MULTI-SOURCE PROJECTION-TYPE DISPLAY
A display device capable of displaying a plurality of projection images is provided. The display device includes a light source within a base and a plurality of projection outputs. Each projection output comprises an optical modulation device and a projection lens system. The light source includes a switch and a plurality of light sources such as lasers or LEDs with different color to one another. The switch receives and diverts light beams from the light sources in a predetermined sequential order to the plurality of projection outputs.
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In general, a projection-type display or video projector displays an image that corresponds to a video signal upon a projection screen or other surface (e.g., wall). One of the major characteristics of projection-type display devices is their ability to display images that are larger in size than images produced by other displays such as CRT (cathode-ray tube) or LCD (liquid crystal display). Projection-type display devices have relatively smaller size compared to the image capable of being projected.
Traditionally, these video projection devices are widely used for business presentations, classroom training, home theater, etc. For example, projection devices are widely used in many schools and institutions to project onto an interactive white board during the course of teaching students.
Most modern projection devices are capable of correcting distortion, focus, and other inconsistencies by way of manual controls. However, to date, conventional projection-type display devices have been designed in a fixed CRT/LCD traditional mindset, such as single video output per device, or a lack of portability for a large image.
The innovation is now described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the subject innovation. It may be evident, however, that the innovation may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing the innovation.
As used in this application, the terms “component” and “system” are intended to refer to a computer-related entity, either hardware, a combination of hardware and software, software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a server and the server may be a component. One or more components may reside within a process and/or thread of execution, and a component may be localized on one computer and/or distributed between two or more computers.
The innovation disclosed and claimed herein, in aspects thereof, comprises a projection system that displays a plurality of images upon a single or a plurality of surfaces. In aspects, a switch is provided that selectively diverts light to each of a plurality of projection outputs, for example, in accordance with predetermined video data. The multiple projection outputs enable multiple images to be displayed upon a single or multiple surfaces simultaneously.
Moreover, color wheels have conventionally been used as a type of analog switch, but are deficiencies inherent to the switching with color wheels that can cause temporary gaps in the resulting display that are sometimes noticeable during viewing. Thus, in accordance with a one non-limiting benefit of one or more embodiments described herein, digital switching of multiples colored light output is enabled that does not suffer from the temporary gaps inherent in analog color wheels. In non-limiting implementations of multiple outputs, three outputs from three projection heads are provided in correspondence to three light sources, e.g., red, green and blue light sources such as light emitting diodes (LEDs) or lasers.
In other non-limiting embodiments, a projection apparatus not only provides digital control of the positioning of multiple light outputs, but also mechanical control on top of the digital control of the light outputs. In these embodiments, in addition to providing digital switching among multiple colored light outputs, the light outputs can be physically moved by way of mechanical structure, such as a semi-rigid but bendable structure, to additionally aim of the colored light outputs. In this way, while the projection apparatus may be able to handle 60 inch image/video rendering, a user can adjust the outputs mechanically to achieve a subset of the total imaging space possible, e.g., such that the lights outputs cover a 40 inch image/video rendering. Thus, less than the total imaging space can be realized through the combination of digital switching of multiple colored light outputs as well as mechanical maneuverability of the light outputs.
In other aspects of the subject innovation, the system may automatically adjust resolution of each (or all) of the displayed images. In other aspects, multiple image alignment may be adjusted as appropriate or otherwise desired. In embodiments, keystone correction may be employed to adjust a displayed image in accordance with a displayed surface. Similarly, image quality may be monitored and detected. Accordingly, light sources may be dynamically controlled as a function of captured data.
Referring initially to the drawings,
As shown in
At 202, light is produced via multiple light sources such as multiple laser sets. In alternative aspects, it is to be understood that light may be produced via multiple light emitting diodes (LEDs) or other suitable light source. Video data may be analyzed at 204, for example, to determine an intended display configuration. In examples, the innovation may be used to project multiple images upon a single surface. Alternative, in other aspects, multiple surfaces may be employed to display multiple images.
At 206, light may be diverted to multiple outputs 107 as described with reference to
At 208, light may be selectively transmitted. For example, modulation devices within each output may selectively transmit light in accordance with video data. At 210, the transmitted light may be output onto a surface or screen. In other aspects, multiple surfaces or screens may be employed to output or display images. As described above, multiple projection chambers may be used to project multiple images from a single projection-type display device, though chambers are optional in that multiple light outputs is sufficient. The figures that follow illustrate more detailed example devices in accordance with the features, functions and benefits of the innovation. Thus, the innovation will be better understood upon a review of the disclosure with respect to the following figures.
Referring now to
Base 12 is configured to maintain a position of display device 10, e.g., relative to a stationary object. In embodiments, base 12 includes a relatively flat bottom that allows display device 10 to rest upon a flat surface such as a table or desk. One or more high friction pads 18 attach to a bottom surface 22b of base 12 to increase static friction with the flat surface. Base 12 may also comprise a receiving slot 27 that allows modular attachment of functional accessories for display device 10. For example, slot 27 may receive a clip attachment that comprises a spring-powered clip for clamping base 12 onto a stationary object. This allows base 12 and display device 10 to be mounted on non-flat or non-horizontal surfaces such as vertical walls of bookshelves and cubicles, and personal clothing or accessories such as belts or straps, for example. Base 12 may also comprise another slot on its bottom side, dimensioned the same, to permit reception of the functional accessories on the bottom side of base 12.
A housing 20 protects internal components within base 12, defines outer dimensions of base 12, and defines dimensions of an inner light source output. As shown, housing 20 is about rectangular and comprises four sidewalls 22c-f (only facing sidewalls 22c and 22d are shown in the figure), top wall 22a, and bottom wall 22b. Walls 22 comprise a suitably stiff or rigid material that grants structural rigidity for base 12 and mechanical protection for internal components within housing 20. A lightweight and rigid plastic, composite, alloy or aluminum is suitable in this regard. One or more walls of housing 20 may also include air vents 24 that allow air flow between the inner chamber and an environment external to housing 20. In other embodiments, housing 20 includes a more rounded or contoured shape than that shown in
Each projection output 14, such as but not limited to a projection chamber 14 as presently described, may include components responsible for the production of images based on received light and received video data, and components capable for the projection of those images. Projection chamber 14 comprises a projection chamber housing 32, an optical modulation device (within projection chamber housing 32, not shown), and an output projection lens system (within projection chamber housing 32, not shown). In accordance with aspects of the innovation, the optical modulation device selectively transmits light generated by a light source in base 12 according to video data included in a video signal provided to the optical modulation device, and will be described in further detail with respect to the figures that follow. The projection lens system outputs light transmitted by the optical modulation device along a projection path, and will also be described in further detail infra.
In operation, a light source within base 12 generates light which is provided to the optical modulation device within projection chamber 14 as a luminous flux. In embodiments, one or more optical fibers transmit light from the light source within base 12 to the optical modulation device within projection chamber 14. The optical modulation device selectively transmits light according to video data in a signal that corresponds to an image to be projected. The projection lens system enlarges and projects an image formed by the optical modulation device. The image is cast with a splay angle such that the image enlarges as the distance to a receiving surface increases.
Projection chamber 14 comprises a projection chamber housing 32 that protects internal components of projection chamber 14; and defines outer and inner dimensions of projection chamber 14. As shown, projection chamber housing 32 is substantially cylindrical, except for an added receiving interface 29 on its bottom side. Projection chamber housing 32 has a cylindrical axis that is about collinear with output projection path. An output optical projection lens 37 of the projection lens system forms and seals forward end of projection chamber 14.
In embodiments, the average diameter of cylindrical projection chamber housing 32 is relatively within ten percent of the diameter of output optical projection lens 37. In other embodiments, projection chamber housing 32 tapers slightly such that its forward end is slightly larger than an aft end, resulting in a slightly frustoconical shape where lens 37 constitutes the larger end.
It is to be understood that the shape and design of projection chamber 14 may vary in alternative aspects. For example, forward end of projection chamber 14 may be rounded to accommodate a circular output lens 37 while aft end is cornered to accommodate a rectangular optical modulation device and associated support components that are locally contained better by a rectangular housing. Projection chamber housing 32 defines an inner chamber as described in further detail below. Projection chamber housing 32 comprises a suitably stiff material for structural rigidity of base 12 and internal component protection. A lightweight and rigid plastic, composite, alloy or aluminum is suitable for several embodiments.
Receiving interface 29 is disposed on the lower side of projection chamber 14 and permits coupling between projection chamber 14 and positional interface 16. Receiving interface 29 also permits containment and protection of display device 10 components that do not entirely fit within projection chamber 14, or components that require spatial arrangements outside of projection chamber 14. In embodiments, receiving interface 29 comprises the same material as projection chamber housing 32 and extends the interior projection chamber provided by projection chamber housing 32.
Positional interface 16 allows projection chamber 14 to be moved relative to base 12, and allows projection chamber 14 to maintain a constant position relative to base 12 after being moved. Thus, positional interface 16 allows a user to point or aim projection chamber 14 and manipulate the position of an output image projected by display device 10 with ease. In embodiments, positional interface 16 comprises a ball and socket combination that permits relative rotational movement between projection chamber 14 and base 12. In other embodiments, positional interface 16 comprises corrugated metal tubing that is sufficiently rigid to hold a position for projection chamber 14, while compliant enough for a user to bend the tubing to achieve a desired position and orientation for projection chamber 14.
Positional interface 16 couples to base 12 and couples to projection chamber 14. For the embodiments shown in
In embodiments, upper end of positional interface 16 couples at a location relatively close to a center of mass of projection chamber 14 to minimize mechanical moments transmitted onto base 12, e.g., those resulting from a displacement of center of mass of projection chamber 14 away from a center of mass for base 12. In other embodiments, base 12 includes a recessed groove in top wall 22a that allows positional interface 16 to be folded or collapsed down into top wall 22a, thereby decreasing the profile of display device 10 during non-use.
In embodiments, display device 10 comprises three projection chambers 14. Each of the projection chambers 14 includes an optical modulation device 102 and a projection lens system 112. The optical modulation device 102 is configured to selectively transmit light generated by the light source according to a receiving video data. The projection lens system 112 is configured to output light transmitted by the optical modulation device 102 along a predetermined projection path, so as to display projection images on one or more external receiving surfaces.
The switch 8 is capable of diverting the red laser beam, the green laser beam and the blue laser beam in a predetermined sequential order to each of the three projection chambers 14. For instance, in embodiments, there are three modes corresponding to a first time frame, a second time frame and a third time frame, respectively.
In the first mode, during the first time frame, red laser beam is transmitted from switch 8 to optical modulation device 102a; green laser beam is transmitted from switch 8 to optical modulation device 102b; blue laser beam is transmitted from switch 8 to optical modulation device 102c.
In the second mode, during the second time frame, red laser beam is transmitted from switch 8 to optical modulation device 102c; green laser beam is transmitted from switch 8 to optical modulation device 102a; blue laser beam is transmitted from switch 8 to optical modulation device 102b.
In the third mode, during a third time frame, red laser beam is transmitted from switch 8 to optical modulation device 102b; green laser beam is transmitted from switch 8 to optical modulation device 102c; blue laser beam is transmitted from switch 8 to optical modulation device 102a.
Lasting time of the first time frame, the second time frame and the third time frame may be identical to one another in embodiments. Namely, the first mode, the second mode and the third mode take turns evenly to be applied in the light source 64. In some other embodiments, lasting time of the first time frame, the second time frame and the third time frame may differ from one another according to system requirement. Such adjustment toward lasting time may be used as color control manner of the display device 10.
In embodiments, base 12 is designed or configured to maintain balance of display device 10. In this case, base 12 may be designed to maintain balance for any position of projection chamber 14 relative to base 12 while base 12 rests on a flat surface. Thus, components within base 12 may be arranged and situated such that they cumulatively provide a center of mass 23 relatively close to a geometric center for a footprint of base 12. As shown, light source 64 and power supply 66, which are typically the heaviest components in base 12, are disposed relatively central to the footprint in one dimension and on opposite sides of center of mass 23 in the other dimension. In embodiments, components within base 12 are arranged within base 12 according to their weight in order to substantially balance moments about a center of mass 23. The exact position of each component will depend of on the number and type of components and base 12 layout. In addition, housing 20 may be sized to provide a wide enough footprint to balance moments produced by positions and orientations of projection chamber 14 away from a center of mass 23 for base 12.
Fans 62a and 62b move air through light source chamber 65 for cooling components within light source chamber 65. In embodiments, fans 62a and 62b draw air in through inlet air vents 24a on one side of base 12 and exhaust heated air out of exhaust air vents 24b after the air has cooled internal components of base 12 and walls of housing 20. One skilled in the art will appreciate that fans 62a and 62b, inlet air vents 24 and exhaust air vents 24b placement will vary with internal component placement within light source chamber 65. Specifically, fan 62a and 62b placement, and airflow patterns effected by fans 62 within light source chamber 65, is designed according to individual temperature regulation requirements and heat generation contributions of components within base 12. Light source 64 and power supply 66 generate the largest proportion of heat within base 12, while control circuitry 76 and input/output circuitry 74 call for tighter temperature regulation. Correspondingly, inlet air 69 passes in through inlet air vents 24a, initially passes and cools control circuitry 76 and input/output circuitry 74 while the air is relatively cool, passes across power supply 66 and light source 64, and exits out exhaust air vents 24b. The exhaust air may also cool fan motors 63a and 63b, which rotate fans 62a and 62b, respectively. In embodiments, multiple fans are used to permit a lower profile for base 12.
It is to be understood that the number and size of fans used will depend on heat generation within display device 10 and a desired air flow to maintain one or more heat dissipation goals. Light source chamber 65 may also include one or more vertical or horizontal airflow guides 67 within light source chamber 65 to direct and distribute airflow as desired. In embodiments, light source 64 comprises one or more diode laser arrays and one or more circuit boards to power and control the diode lasers. In this case, airflow guides 67 are arranged to direct cooling air across the surfaces of each circuit board. As will be described in further detail below, fans 62a and 62b may also be responsible for drawing air through positional interface 16 and to or from projection chamber 14 to cool the optical modulation device included therein.
The array of lasers may comprise one or more red diode lasers 96a, one or more green diode lasers 96b, and one or more blue diode lasers 96c. A red laser set 961 comprises a plurality of red diode lasers 96a. A green laser set 962 comprises a plurality of green DPSS lasers 96b. A blue laser set 963 comprises a plurality of blue diode lasers 96c. The number and power of lasers for each color is scaled according to a desired light intensity output for display device 10 and according to the light sensitivity of a viewer to each color. Each laser diode is installed on a circuit board 97, which mounts, and provides electrical control for each laser diode installed thereon. Multiple lasers may be mounted on a single board 97 to reduce space occupied by light source 64. Including multiple lasers for a single color allows output luminosity of display device 10 to vary with the number of lasers turned on for each color, and allows for redundant control of light generation by lasers. Thus, one or more of the lasers may be turned off if less light intensity is desired, longevity of individual lasers benefits from periodic shut-down, or power conservation for display device 10 is preferred.
Referring to
Referring again to
The number of fiber optic cables in cabling 72 will vary with design. Multiple fiber-optic cables may be employed in a design where each cable services one or more colors to the switch and one cable from the switch to each optical modulation device. As shown in
Junction 75 permits transmission of light from fiber-optic cables 72 into converging optics 77, and into common fiber-optic cable 79. Converging optics 77 redirect incoming light from each fiber-optic cable into common fiber-optic cable 79 and comprise a converging lens 77a that redirects light toward re-collimating lens 77b, which collimates and re-directs incoming laser light from converging lens 77a into common optical fiber 79. Although not shown, junction 75 may also include a rigid structure, such as a suitably dimensioned molded plastic, that fixtures (e.g., holds and positions) fiber-optic cables and common fiber-optic cable 79. In embodiments, junction 75 comprises an optical adhesive that adheres cables directly to converging lens 77a. In other embodiments, at the outlet end 72b, the fiber-optic cables are combined into a larger cable that contains multiple fibers. Multiple fiber cables, such as fiber ribbon-based cables and those that employ multiple fibers located circumferentially within a round tube, are commercially available from a variety of vendors.
Multiple fiber-optic cable designs may be employed where each cable transmits a primary color. For example, three fiber-optic cables may be employed in which each cable transmits light from a primary color set of lasers along three different optical paths to three primary colors dedicated optical modulation devices.
Referring again to
Power supply 66 is configured provide to electrical power to light source 64 and other components within display device 10 that rely on electrical power. Thus, power supply 66 provides electrical energy to control circuitry 76, input/output circuitry 74, fans 62a and 62b, power diode 80 and components within projection chamber 14 such as optical modulation device 102 (
In other embodiments, power supply 66 comprises at least one rechargeable battery 66a. Battery 66a may be recharged using power provided through inlet port 81. Battery 66a allows display device 10 to operate on stored energy and without reliance on proximity to an AC power source, which further increases portability of display device 10. For example, inclusion of a battery in base 12 extends usage into a car, library, coffee shop, remote environment, or any other setting where AC and fixed power outlets are not readily available or within reach.
At least one fiber-optic cable 72 transmits light from light source 64 to relay optics disposed along a light path between an exit end of fiber-optic cable 72 and optical modulation device 102 (
Fiber-optic interface 70 facilitates transmission of light from each laser into fiber-optic cabling 72. Fiber-optic interface 70 may include one or more fixtures that position and hold an inlet end for each fiber-optic cable included in fiber-optic cabling 72 such that light output from the light source transmits into a fiber-optic cable. Fiber-optic interface 70 may also include optics that direct light from lasers into fiber-optic cabling 72. In embodiments, a single fiber-optic cable is used in cabling 72 and fiber-optic interface 70 includes a lens system disposed between the outlet of a lamp or each laser and the inlet of the single fiber-optic cable to direct light into the cable. The lens system may comprise at least two lenses: a first lens to direct the light towards the fiber entrance and a second lens that collimates light entering the cable. In other embodiments that implement a one-to-one laser to fiber-optic cable relationship; fiber-optic interface 70 holds the inlet end for each fiber-optic cable relatively close to the outlet of each laser to receive light therefrom. Each cable in this case may include a converging lens at its inlet end that facilitates light capture and transmission into a cable.
In another one-to-one design, each fiber-optic cable in fiber-optic cabling 72 includes a fixture that permits attachment to another object. For example, conventionally available fiber-optic cables available from vendors such as Ocean Optics Inc. of Dunedin, Fla. include a detachable fixture with a thread that allows screwing and fixing of the fiber-optic cable to a mating thread disposed on a laser housing. In this case, fiber-optic interface 70 comprises the threaded fixture from each cable and the mating thread on the laser.
In some cases, a projection device with multiple outputs may be operated in single output mode. In single path embodiments where red, green and blue lasers transmit colored light to a single optical modulation device along a single fiber-optic cable, switch 105 and fiber-optic interface 70 receives colored light from each colored laser, in turn, according to timed control signals provided to the lasers by control circuitry 76.
Input/output circuitry 74 provides an interface between control circuitry 76 and one or more input/output interfaces 78. Input/output interfaces 78 are configured to receive at least one cable, wire, or connector, such as a cable for transmitting a video signal comprising video data from a digital computing device. Common ports suitable for use with input/output interfaces 78 include ports that receive S video cable, 6-pin mini DIN, VGA 15-pin HDDSUB female, an audio cable, component RCA through an S-Video adaptor, composite video RCA cabling, a universal serial bus (USB) cable, fire wire, etc. Input/output interfaces 78 may also include an audio output port for wired connection to speakers employed by a headphone or speaker system.
Control circuitry 76 provides control signals to components of display device 10. In embodiments, control circuitry 76 provides control signal to components not within base 12 by routing data from input/output circuitry 74.
Control circuitry 76 may provide control signals to light source 64 that determine when light source 64 is turned on/off. In addition, circuitry 76 may include memory that stores instructions for the operation of components within display device 10. For example, circuitry 74 may provide control signals to control fans 24 according to stored heat regulation instructions. One or more sensors may also be disposed within base 12 to facilitate thermal regulation. For example, a temperature sensor may be disposed proximate to circuitry 74 and 76 to monitor temperature levels and participate in closed loop temperature control within base 12 as controlled by control circuitry 76.
Input/output circuitry 74 and input ports 78 collectively permit communication between display device 10 and a device that outputs a video signal carrying video data. For example, desktop computers, laptop computers, personal digital assistants (PDAs), cellular telephones, video game consoles, digital cameras, digital video recorders, DVD players, and VCRs, may all be suitable to output video data to display device 10. Video data provided to control circuitry 76 may be in an analog or digital form. In some cases, input/output circuitry 74 and control circuitry 76 convert analog video signals into digital video signals suitable for digital control of an optical modulation device included in display device 10, such as a liquid crystal display “LCD” device or a digital micromirror “DMD” device. Thus, input/output circuitry 74 or control circuitry 76 may also include support software and logic for particular connector types, such as processing logic required for S-video cabling or a digital video signal. Control circuitry 76 may also include and access memory that facilitates conversion of incoming data types and enhances video compatibility of display device 10. Suitable video formats having stored conversion instructions within memory accessed by control circuitry 76 may include NTSC, PAL, SECAM, EDTV, and HDTV (1080i and 720p RGBHV), for example.
When lasers are used for light generation within light source 64, as described above, control circuitry 76 receives video data included in a signal via one or more input ports 78 and input/output circuitry 74, converts the data to color frame sequential data, and synchronizes the frame sequential data for delivery to each optical modulation device 102 and to each laser 96. In a single, double or triple path design between lasers 96, switch, and the optical modulation device where optical fibers transmit red, green and blue light in a time controlled sequential order to each optical modulation device, this includes synchronizing the timing of data sent to the optical modulation device and on-off commands sent to lasers 96. It is to be understood that circuitry, e.g., control circuitry, is not intended to be limited to hardware only. Rather the circuitry, or controller, is intended to include hardware, software or combinations of hardware and software.
Fiber-optic cabling 72 attaches to a fiber-optic interface 104 and outputs light to relay optics 106. In embodiments, fiber-optic interface 104 secures fiber-optic cabling 72 such that slack is provided for fiber-optic cabling 72 between attachment at fiber-optic interface 104 and attachment within base 12. The slack allows fiber-optic cabling 72 to deflect with positional interface 16 for various positions of projection chamber 14 relative to base 12.
Together, fiber-optic cabling 72 and fiber-optic interface 104 direct light generated by light source 64 to prism 110. In embodiments, fiber-optic cabling 72 and interface 104 are configured with respect to prism 110 so as to provide an optical path of incident light that is about perpendicular to an incident surface of prism 110. Some digital micro-mirror light modulator designs require that incoming light be incident on the light modulator from either above or below its light reflecting surface to allow light output along projection path 31.
Receiving interface 29 of projection chamber housing 32 and fiber-optic interface 104 ease this requirement and allow a designer to arrange fiber-optic cabling 72 and fiber-optic interface 104 within receiving interface 29 such that fiber-optic interface 104 directs light at a particular desired angle relative to prism 110, and onto optical modulation device 102. For example, fiber-optic interface 104 may be coupled to receiving interface 29 to provide an incident light path that is perpendicular onto an incident surface of prism 110 and has a 45 degree angle relative to optical modulation device 102, e.g., prism 110 is rotated 45 degrees about projection path 31. Attachment between interface 104 and housing 29 maintains the desired incoming light angle despite changing positions of fiber-optic cabling 72 along its length caused by repositioning of positional interface 16.
Relay optics 106 and 108 convert light receive from fiber-optic cabling 72 to light suitable for transmission into prism structure 110 and onto optical modulation device 102. This may include shaping and resizing light flux received from fiber-optic cabling 72 using one or more lenses.
In other embodiments, display device 10 comprises a pair of fly-eye lenses arranged in the optical path between light source 64 and prism 110. Cumulatively, the pair of fly-eye lenses uniformly distributes light received from fiber-optic cabling 72 to the flux transmitted upon optical modulation device 102. In embodiments, the pair of fly-eye lenses are arranged on either and a fiber-optic cabling 72. The first fly-eye lens is disposed at fiber-optic interface 70 within base 12, receives light from a lamp or diode laser array, and spatially divides the entire input light flux into a set of blocks or components that each comprises a portion of the total area of the inlet flux. Light for each block or component then travels down its own fiber-optic cabling 72. The second fly-eye lens comprises the same number of blocks or components and is disposed at relay lens 106. The second fly-eye lens receives a fiber-optic cable for each block or component and outputs light for each component such that the light from each component is expanded to span the downstream dimensions of optical modulation device 102 and the projected image.
Prism structure 110 is an optical modulation system that provides light to optical modulation device 102 at predetermined angles. Prism structure 110 also transmits light from optical modulation device 102 to the projection lens system 112 along projection path 31. Prism structure 110 comprises prism components 110a and 110b that are separated by air space or bonding interface 110c. Interface 110c is disposed at such an angle so as to reflect light provided from fiber-optic cables 72, and intermittent relay optics, towards optical modulation device 102. In addition, interface 110c allows light reflected by optical modulation device 102 to transmit to projection lens system 112 along projection path 31.
Optical modulation device 102 is configured to selectively transmit light to provide an output image along projection path 31. To do so, optical modulation device 102 is supplied with video data included in a video signal and selectively transmits light according to the video data. The video data is typically provided to device 102 on a frame by frame basis according to individual pixel values. If the video data is not received by display device 10 in this format, control circuitry 76 in base 12 may convert the video data to a suitable format for operation of optical modulation device 102. In embodiments, individual light modulation elements within optical modulation device 102, which each correspond to an individual pixel on the output image, translate received digitized pixel values into corresponding light output values for each pixel.
In embodiments, optical modulation device 102 is a mirror based optical modulation device, such as a digital micro mirror device (or DMD, a trademark of Texas instruments Inc.) commercially available from Texas Instruments, Inc. In this case, optical modulation device 102 comprises a rectangular array of tiny aluminum micromechanical mirrors, each of which individually deflects about a hinged axis to selectively reflect output image light down projection path 31, and reflect non-image light away from projection path 31. The deflection state or angle of each mirror is individually controlled by changing memory contents of an underlying addressing circuit and mirror reset signal. The array of mirrors is arranged such that each mirror is responsible for light output of a single pixel in the video image. Control signals corresponding to pixel output are supplied to control electrodes disposed in the vicinity of each mirror, thereby selectively deflecting individual mirrors by electromagnetic force according to video data on a pixel by pixel basis. Light reflected by each mirror is then transmitted along projection path 31, through prism structure 110, and out of projection chamber 14 using projection lens system 112.
A controller 114 is included with optical modulation device 102 and provides control electrical signals that direct each micromechanical mirror to desired light reflecting states corresponding to pixel video data for each pixel. Control and power cabling 120 provides electrical communication between controller 114 and control circuitry 76 in base 12 (
The illumination angles for optical modulation device 102 are set by the output direction of fiber-optic interface 102, arrangement of relay optics 106 and 108, and the faces of prism structure 110. After light reflection by individual mirrors of optical modulation device 102, reflected light exits prism structure 110 towards lenses 112 along projection path 31.
Vents 118 are disposed on an aft portion of projection chamber housing proximate to optical modulation device 102. An air duct 122 includes a high-pressure end proximate to optical modulation device 102 and controller 114, and a low pressure end disposed within base 12. As mentioned above, fans 62a and 62b may draw air from within base 12 and exhaust the air out exhaust vents 24b, which creates a negative pressure within base 12 relative to the ambient room or surroundings. Correspondingly, fans 62a and 62b create a negative pressure for the end of air duct 122 within base 12 relative to the opposite end in projection chamber 14, which would otherwise rest at room pressure due to vents 118. By disposing one end of air duct 122 within base 12 and the other end in a space 125 around optical modulation device 102, fans 62 thus draw air from the space 125 and cool optical modulation device 102. Cumulatively, cooling air is drawn from the ambient surroundings around projection chamber 14, through vents 118 and into a space 125 surrounding optical modulation device 102, into duct 122 at end 122a, through duct 122, out duct 122 at end 122b, into base 12, and out air vents 24b. Fans 62 maintain end 122b at a low pressure relative to end 122a, and thus providing cooling for optical modulation device 102.
A projection lens system 112 is disposed along projection path 31 for outputting light transmitted by the optical modulation device along projection path 31. Projection lens system 112 manipulates image light transmitted by optical modulation device 102 along projection path 31 such that a projected image cast on a receiving surface enlarges as distance from output optical projection lens 37 to the receiving surface increases. Projection lens system 112 comprises lenses 112a, 112b, 112c and output optical projection lens 37, each of which are disposed centrically along and orthogonal to projection path 31. Distances between each lens may vary with a desired splay angle from output optical projection lens 37, as may the number of lenses used. In embodiments, display device 10 is designed for a short throw distance, such as between about six inches and about fifteen feet. Display device 10 may also include one or more buttons or tools that allow a user to manually focus and manually zoom output from projection lens system 112. Projection chamber 14 may also include a lens between optical modulation device 102 and prism 110 that converges image light reflected by device 102 towards projection path 31. This allows a reduction in output lens 112 diameters, and a corresponding reduction in diameter and size for projection chamber 14.
In some other embodiments, other types of light modulators and light path designs may be employed. For example, fiber-optic cabling 72 may be arranged for a multiple light path design to transmit light to three primary color dedicated LCD optical modulators, or to three primary color dedicated DMD optical modulators. In the case of an LCD optical modulation device, selective transmission of light comprises selective passage of light through a liquid crystal medium on a pixel by pixel basis.
In addition, although base 12 of
Fiber-optic interfaces 1004 allow a designer to arrange fiber-optic cablings 1072 and fiber-optic interfaces 1004 such that the fiber-optic interfaces 104 direct light at a particular desired angle relative to prism 1010. Relay optics 1006 and 1008 convert light receive from fiber-optic cablings 72 to light suitable for transmission into prism structures 1010. This may include shaping and resizing light flux received from fiber-optic cablings 72 using one or more lenses. In other embodiments, display device 1020 comprises a pair of fly-eye lenses arranged in the optical path between the light sources and prisms 1010.
Prism structures 1010 are optical modulation systems that provide light to optical modulation devices at predetermined angles. The illumination angles for the optical modulation devices are set by the output directions of the fiber-optic interfaces, arrangement of relay optics 1006 and 1008, and the faces of prism structures 1010. After light reflection by individual mirrors of the optical modulation devices, reflected light exits prism structures 1010 along projection paths 1031a, 1031b and 1031c, respectively, from the different positional interfaces 1016. In some other embodiments, other types of light modulators and light path designs may be employed. In the present embodiment, fiber-optic cablings 72 are arranged for a multiple light path design to transmit light from each of the outputs 1014.
In embodiments according to
The switch 8 is capable of diverting the red laser beam, the green laser beam and the blue laser beam in a predetermined sequential order to each of the two optical modulation devices 102. For instance, in embodiments, there are three modes corresponding to a first time frame, a second time frame and a third time frame, respectively.
In the first mode, during the first time frame, red laser beam is transmitted from switch 8 to optical modulation device 102a; green laser beam is transmitted from switch 8 to optical modulation device 102b; and blue laser set 963 is turned off or stays in a low voltage stage which no laser light is generated.
In the second mode, during the second time frame, green laser beam is transmitted from switch 8 to optical modulation device 102a; blue laser beam is transmitted from switch 8 to optical modulation device 102b; and red laser set 961 is turned off or stays in a low voltage stage which no laser light is generated.
In the third mode, during a third time frame, red laser beam is transmitted from switch 8 to optical modulation device 102b; blue laser beam is transmitted from switch 8 to optical modulation device 102a; and green laser set 962 is turned off or stays in a low voltage stage which no laser light is generated.
Lasting time of the first time frame, the second time frame and the third time frame may be identical to one another in embodiments. Namely, the first mode, the second mode and the third mode take turns evenly to be applied in the light source 64. In some other embodiments, lasting time of the first time frame, the second time frame and the third time frame may differ from one another according to system requirement. Such adjustment toward lasting time may be used as color control manner of the display device 10a.
It is to be understood that that keystone correction may be applied in the condition of the projection path 31 of a projection chamber 14 being not perpendicular to receiving surface 521, so as to display images corresponding to orthogonal image coordinates.
The orthogonal image coordinates refer to a stored data format, positional arrangement for pixels, or an assumed output format for display of the video information. In some embodiments, pixel values are assigned or stored according to a positional arrangement of pixels in a planar image, such as a right angle x-y coordinate system. The x-y coordinate pixel locations are then used to determine where video data is output on an image. Characterizing video information according to orthogonal image coordinates denotes how they are stored and/or intended for display, and not necessarily how they are actually cast or displayed. Thus, for several present embodiments, the projection image may not always be truly orthogonal if keystone correction has not been applied. Namely, when the projection path 31 of a projection chamber 14 is not perpendicular to receiving surface 521, keystone distortion of the image may appear. Keystone distortion often produces a trapezoidal image for rectangular video information intended for display according to orthogonal image coordinates. In some embodiments, the display device includes keystone correction tool for reducing keystone distortion.
In embodiments, display device 10a also includes one or more image detectors, such as camera module, configured to detect image of external environment, such as receiving surface 521, and to detect projection images, such as video images projected in first projection area 501 and second projection area 502. In embodiments, two image detectors are disposed within each of the two projection chamber 14 of display devices 10a respectively, so as to utilize optical function of the projection lens system 112. In some other embodiments, image detector is disposed outside projection chamber 14; and each of projection chambers 14 comprises an image detector coupled to projection chamber housing externally. In other embodiments, display device 10a may comprise one or more image detector coupled to base 12, optionally with a positional interface to shift viewing angle of image device so as to detect image at various positions.
In other embodiments, image detector(s) may provide information of projection image to display device 10a for automatic keystone correction. Display device 10a may firstly project test images in the first projection area 501 and the second projection area 502. The test images may be quickly flashed in some cases so a user may or may not be aware of their presence. Each of the image detectors is capable of detecting the projection test image in real-time and providing the receiving information to control circuitry 76 so as to fix the keystone distortion in closed loops. In embodiments, the detected outlines of the projection images 501 and 502 are compared to predetermined orthogonal image coordinates so as to perform automatic keystone correction function. In other embodiments, the default test image may include a horizontal reference line 531 and a vertical reference line 532. The horizontal reference line 531 and the vertical reference line 532 may include graduation label therein. The automatic keystone correction may be performed by detecting distortion of the horizontal reference line 531 and the vertical reference line 532 of the projection image.
In embodiments, the display device 10a may include an image coordination tool to automatically coordinate multiple projection areas, such as first projection area 501 and second projection area 502.
As shown in
A user may wish to have the first projection area 501 and second projection area 502 with the same size and the same altitude. In this application, the horizontal lines 531 detected by the image detector may be used by the image coordination tool for measuring the size and relative location of each projection area. By aligning the horizontal lines, the image coordination tool is capable of arranging the first projection area 501 and second projection area 502 at a same altitude.
In another embodiment, images 501 and 502 are connected horizontally. In this case, the image coordination may be used to remove any projection overlap between the images 502 and 504 on the receiving surface—after keystone correction. The removed portion of display may be taken from either projected image 502 or 504. A graphics processor associated with the images may then provide a continuous digital workspace between projection images 501 and 502, e.g., a mouse or pointer moves smoothly between the projection images 501 and 502 at their intersection.
In embodiments, the display device 10 uses three projection chambers 14 to project images within three projection areas. First projection area 501 and third projection area 503 are lined up horizontally while second projection area 502 is placed below the first projection area 501 and third projection area 503 as shown. In embodiments, horizontal reference lines 531 and vertical reference lines 532 with graduation labels may be employed by keystone correction tool so as to form projection areas with the same size and with reduced keystone distortion. Intersections of horizontal reference lines 531 and vertical reference line 532 may be used by image coordination tool to adjust locations of the three projection areas to match such setting or default.
In embodiments which user may selectively move and locate first projection area 501, the second projection area 502 and third projection area 503 on the receiving surface 521 according to his/her preference. User may control the position of each projection areas by using OSD (On-screen display) interface 533 such as an arrow as shown. In other embodiments, display device 10 incorporates a built-in screen or is able to connect to an accessory external display 19 as shown. User may drag each of the projection areas to a preferred location through GUI (Graphics-based user interface) displaying on built in screen or accessory external display 19 by pointer, such as mouse input. In other embodiments user may drag each of the projection areas by finger touch on the built-in screen or accessory external display 19 which has touch-screen function.
As shown in
In embodiments, the display device 10 is employed by a video game device for generating near-peripheral surrounding video. For example, a user sitting in front of display device 10 benefits from a full peripheral vision video game experience where objects may appear from not only the front but also the sides and be detected by peripheral vision. In embodiments, the display device 10 may be installed near to ceiling to prevent casting a shadow of user.
It should be noted that the above-described embodiments are more general than connecting multiple images and are applicable to a variety of techniques for casting the images on a surface efficiently where the assumption of the “fixed TV box” is not available. In other words, more generally, the presently described embodiments enable the projected content to be displayed according to a layout to optimize viewability.
In this regard, without knowing where a user is looking at with his or her eyes, for multiple images, embodiments have been described herein that ensure vertical lines are vertical and horizontal lines are horizontal. In yet another embodiment, with a camera configured to receive video input resulting from the projection of multiple images on the wall, in effect, the device can “see what it is doing” with respect to the projected content and make intelligent adjustments where something about the projected content is disturbing viewability.
A one image projector usually casts orthogonal to its receiving surface. The three image projection system having multiple outputs as described in various embodiments herein will generally have vertical and horizontal keystoning effects, however, since typically orthogonality will not necessarily be maintainable or sustainable. Accordingly, various embodiments can employ software that coordinates the projection of images dynamically based on feedback from the camera about how the images are displaying.
In some cases, a camera included in the projection system obtains image feedback for each of the three images. A controller on the projector or a device in communication with the projector receives the camera feedback and changes vertical and horizontal keystoning accordingly. The camera can also provide a measure of vertical and horizontal distortion for each image.
For example, a continuous horizontal line on all three images may be aligned, despite the offset image castings in height on the three surfaces—both in the horizontal and vertical directions. In this regard, video games often require knowledge of horizon lines for presentation of game graphics. The presently described embodiment thus facilitates the consistent presentation of video games despite different image casting conditions (e.g., as might be ubiquitous from a handheld device that moves with a user's hands).
Software alignment and coordination of the images is thus achievable. The result is the automatic maintenance of rectangular images on all three surfaces. Coordination marks may be cast to facilitate image vertical and horizontal alignment. These are lines or other fiduciary graphics that permit closed loop feedback with the camera. For example, red lines that should be connected on adjacent images may be flashed. The software may then manipulate the images to suitably align the fiduciary lines.
In embodiments which the display device 10 employed by video game device for generating near-peripheral surrounding video, user may experience. For example, these kinds of embodiments may be applied in helicopter, plane and other flying games to form full visual feedback for a horizon change, e.g., the video ground rises or falls. Image coordination tool may be applied to adjust projection images to be projected at proper positions. Other embodiments of the three receiving surfaces may include projecting image on two walls and a ceiling, or on two walls and a floor. It is to be understood and appreciated that other multi-surface examples exist which are to be included within the scope of this disclosure and claims appended hereto.
Control circuitry 76 receives video signal that has been pre-processed by input/output circuitry 76 and then further processes video signal so as to provide control signals to components of display device 10 for outputting video projection according to video signal.
In embodiments, control circuitry 76 may include a processor 761, a memory 762, a control input/output interface 763, a video input interface 764 and a video output interface 765. Video input interface 764 couples to input/output circuitry 74 for receiving pre-processed video signal from input/output circuitry 764. Video output interface 765 couples to light source 64 and optical modulation devices 102 for providing control signals, which are based on the video signal and further modulation by control circuitry 76.
Control input/output interface 763 may include user interface 731, image detector interface 732, network interface 733 for coupling to user input devices, image detector and a network connecting to display device 10. User input device may include embedded/built-in control button(s), keypad, display, touch screen or stick controller; or accessory external mouse, keyboard, display with or without touch-screen function, remote controller or other controller. OSD (On-screen display) control instructions may be displayed on embedded/built-in display or touch screen, external display, or on the projection image.
Processor 761 may be a commercially available processor, controller or microprocessor such as one of the Intel or Motorola family of chips for processing/calculating data based on programs, modules or data structures in memory 762. In other embodiments, processor 761 and at least part of memory 762 are manufactured as a single chip; namely, a system on chip application. Memory 762 may include high speed random access memory and may also include non-volatile memory, such as one or more magnetic disk storage devices. Memory 762 may optionally include one or more storage devices.
The memory 762 in control circuitry 76 may store the following programs, modules and data structures, or a subset or superset thereof: an operation system 710, a video signal processing module 711, a light source control module 712, an optical modulation control module 713, a key stone correction tool 714, an image coordination tool 715, a thermal control application 718, an OSD (On-screen display) application 719, etc.
Operating system 710 includes procedures for handling various basic system services and for performing hardware dependent tasks.
OSD (On-screen display) application 719 contains control icons or figures that may be displayed on embedded/built-in display or touch screen, external display, or on the projection image; it also contains rules and instructions in associated with user's input.
Video signal processing module 711 is used for processing the video signal from input/output circuitry 764 so as to construct frame based control signals which may be adopted by optical modulation device 102.
Light source control module 712 is for controlling red laser set 961, green laser set 962, blue laser set 963 and switch 8 within light source 64 in order to drive light source 64 to divert the red laser beam, the green laser beam and the blue laser beam in a predetermined sequential order to each of the three projection chambers 14. Optical modulation control module 713 is for driving optical modulation device 102.
Keystone correction tool 714 may include one or more distortion reducing algorithm. It may utilize several stored default test images 741 such as those include horizontal references line 531 and/or vertical reference lines shown in the figures described above, and also utilize detected information 742 such as projection image feedback detected by image detector to perform auto keystone correction. In embodiments, keystone correction tool 714 includes a distortion look-up table to fast define a predetermined correction parameter according a match-up result of detected projection image feedback and default test image.
Image coordination Tool 715 may include one or more algorithm to coordinate images to be projected by multiple projection chambers according to user's preference or default configurations. In embodiments, default image configurations 751 and/or user preferences 752 may be stored in the memory 762. Image coordination tool 715 may employ keystone correction tool 714 for coordinating multiple images in a close loop, so as to generate video output not only at target locations but also better matching desired shapes and sizes. In embodiments, an alignment application 753 included in image coordination tool 715 may be used for aligning multiple images such as shown in
Thermal control application 718 may include stored thermal regulation 781 and fan driver 782. Temperature information detected by thermal detector 80 is provided to control circuitry 76 through thermal interface 738. Thermal control application 718 drives 62a and/or 62b based on thermal regulation 782 and the received thermal information.
Of particular note are the limitations that gaming content on handheld devices has suffered in the past without the projection of content as described herein. Namely, due to limited screen real estate, the gaming experience on handheld devices has suffered. In short, a limited amount of eye or pixel resolution makes some tasks in a game tedious if only a small screen is available. For instance, slight motion may be hardly noticeable on a small screen or a screen having limited resolution. However, with the multiple projection output switching techniques described herein, a much larger screen is realized on a wall or other surface, and the gaming experience is vastly improved from small form factor devices, e.g., gaming from small form factors is limitless when greater than equal to 60 inch images can be projected efficiently onto a surface. Additionally, while documents such as Excel spreadsheets are difficult to view on a small screen, when projected according to one or more of the embodiments herein, the Excel spreadsheet can be viewed at full or even greater size.
Besides the central-weighted embodiments as described, the display device 10 may allocate relative higher processing resource for a predetermined angular range of user's visual field. This may be achieved by knowledge of the video data being presented and/or utilizing an eye sensor which is coupled to control circuitry and is configured to detect a direction of line of vision of a user. In the former case, for example in a video game in which the game knows and controls video output to the user, the system may make assumptions about where the user is gazing to reduce video information and processing to other parts. In the latter case, eye detection module 755 included in the image coordination tool 715 uses the fovea information retrieved by the eye sensor to set up a weighted video area; and the resolution adjustment instruction 754 may be applied to areas that outside the weighted video area so as to perform resolution adjustment, such as reducing video resolution in such area.
In embodiments, video details are reduced outside about forty degrees in angular separation from user's fovea, i.e., the line of vision. In other embodiments, video details are reduced in stages. For example, color may be reduced after twenty degrees in angular separation from user's fovea; and resolution may be diminished after forty or sixty degrees, etc.
By way of some background, human vision employs a number of information reduction mechanisms to reduce the amount of visual information in an environment to a manageable level. Such mechanisms include shape detection and foreground/background separation. Foreground/background separation divides an environment to into a foreground where more information is processed (e.g. more detail) and a background where less information is processed (e.g. less detail). Shape detection allows a person to recognize objects based on reduced information, such as outer contours that resemble a shape for the object.
In one embodiment, the invention leverages the background information reduction mechanism to reduce the amount of video information displayed by a multiple image projector. The foreground of human vision is defined by the angular separation of rods and cones. Cones are concentrated in the center, or fovea centralis. Rods are absent there, but dense elsewhere.
Measured density curves for the rods and cones on the retina show an enormous density of cones in the fovea centralis, which are attributed for color vision capability and the highest visual acuity. Visual examination of small detail involves focusing light from that detail onto the fovea centralis. On the other hand, the rods are absent from the fovea. At a few degrees away from it their density rises to a high value and spreads over a large area of the retina. These rods are responsible for night vision, a highly sensitive type of motion detection, as well as our peripheral vision.
Notably, the cones are responsible for high resolution vision. The eye moves continually to keep the light from the object of interest falling on the fovea centralis where the bulk of the cones reside.
Correspondingly, with knowledge of foreground and background areas in media content, the amount of visual information in background portions of the video display can be reduced. This technique leverages the foreground/background visual processing mechanism in humans to reduce video storage and processing demands. Since an individual processes less information in a background visual region, reducing video output in an inactive portion may not sacrifice perceived video quality. In one non-limiting embodiment, video detail is reduced outside about 40 degrees in angular separation from the fovea. Other angular separation amounts or ranges can be suitable for use based on one or more variables affecting an environment.
In another specific embodiment, video detail is reduced in stages. For example, color may be reduced after 20 degrees in angular separation from the fovea, resolution may be diminished after 40 or 60 degrees, etc. In one embodiment, a portion of video of interest is used to determine where the person is looking, e.g., text that they should be reading at a known location. Video away from this foreground section is then deteriorated in acuity and detail.
There are at least two techniques for separating foreground and background. First, a camera can be used to detect where the person is looking to help determine where the person's visual foreground is, i.e., gaze tracking can be employed. The camera can be calibrated to find a user and the user's eyes at a time of context sensitivity, e.g., when the user is entering input into a field or other UI element on screen (for example, entering a user name). In this regard, at the time of entering the input, it is highly likely the user is staring at that field or other UI element. At such time, not only can the UI element be treated like the foreground, thereby reducing background requirements, but also the system is calibrated to find the user's eyes. Information in the background section may then be decreased in detail, particularly in color, while maintaining luminance detail and motion so as to not diminish from relatively larger perception of these in the periphery.
However, with respect to a second technique, gaze tracking may not be available or possible for certain environments for projecting video content as described herein, e.g., for some embodiments involving a handheld device. In such instances, the notion of real-time determination of background and foreground can be achieved based on context sensitive user actions. For instance, as shown in
The de-emphasis of background results in the reduction of size of the video data displayed and also reduces the processing load to output large images, saving power as well. Large images cast by multiple image projectors, as described herein, is revolutionary in that it provides vastly greater visual information for a person than in the past, i.e., this represents a paradigm shift from LCD screens. Portable display manufacturers, video game companies, graphics companies, etc. can all take advantage of the techniques for discriminating between foreground and background content as described herein.
Housing 90 defines outer dimensions of projector module 98 and also provides mechanical protection for internal components of projector module 98. Housing 90 may also include air vents that permit airflow between chamber of housing 90 and external environment. Vents may also be placed on the housing 90. Power supply provides electrical power to red laser set 92, green laser set 94, blue laser set 96 and other components within projector module 98 that consume electrical power. Thus, power supply may provide electrical energy to control circuitry, input/output circuitry, fans, control circuitry 97 and micro scanner 99.
Several different embodiments of red laser set 92, green laser set 94 and blue laser set 96 may be provided. The optics 91 receives red, green and blue laser light from red laser set 92, green laser set 94 and blue laser set 96 respectively and provides three separate light outputs to micro scanner 99. The input/output circuitry provides video signal, from input/output interfaces, to control circuit 97. The control circuit 97 controls red laser set 92, green laser set 94 and blue laser set 96 respectively. During a time frame of pixel, red laser set 92, green laser set 94 and blue laser set 96 respectively generates predetermined power of laser corresponding to a predetermined gray scale of red, green or blue based on control signals from control circuitry 97.
Although the foregoing invention has been described in some detail for purposes of clarity of understanding, those skilled in the art will recognize that various modifications may be made within the scope of the appended claims. For example, although the positional interfaces described herein have coupled to the projection chamber from the bottom, it is understood that a positional interface may couple to the projection chamber from the rear. In this case, an air duct, electrical connection and optical cabling may extend through the projection chamber to its respective functional location. The invention is, therefore, not limited to the specific features and embodiments described herein and claimed in any of its forms or modifications within the scope of the appended claims.
What has been described above includes examples of the innovation. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the subject innovation, but one of ordinary skill in the art may recognize that many further combinations and permutations of the innovation are possible. Accordingly, the innovation is intended to embrace all such alterations, modifications and variations that fall within the spirit and scope of the appended claims. Furthermore, to the extent that the term “includes” is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term “comprising” as “comprising” is interpreted when employed as a transitional word in a claim.
Claims
1. A system configured to facilitate projection display of an image, comprising: a multi-output projection component comprising a plurality of projection outputs, wherein the switching component is configured to direct a portion of the light to an appropriate one of the plurality of projection outputs, and the multi-output projection component is configured to cast multiple images using the portion of the light and video data via more than one of the appropriate one of the projection outputs onto a plurality of projection areas as a function of video data.
- a switching component configured to receive light from a plurality of light sources; and
2. The system of claim 1, further comprising:
- a controller coupled to the switching component configured to control the switching component to sequentially direct the portion of the light to a different one of the plurality of projection outputs.
3. The system of claim 1, wherein the controller controls the switching component to sequentially direct the portion of the light to each of the plurality of projection outputs for substantially the same amount of time before switching to the next projection output.
4. The system of claim 1, wherein the controller controls the switching component to sequentially direct the portion of the light to each of the plurality of projection outputs for variable amounts of time before switching to the next projection output based on at least one system parameter.
5. The system of claim 1, further comprising a plurality of modulators, wherein each of the modulators is configured to facilitate the projection of the portion of light.
6. The system of claim 1, wherein each of the plurality of light sources includes a laser-based light source.
7. The system of claim 1, wherein each of the plurality of light sources includes a light emitting diode (LED).
8. The system of claim 1, wherein the plurality of projection areas are located upon a single planar surface.
9. The system of claim 1, wherein the plurality of projection areas are located upon at least two surfaces.
10. The system of claim 9, wherein the at least two surfaces comprise at least two of a wall, floor, or ceiling surface.
11. The system of claim 1, further comprising a controller configured to align each of the outputs upon each of the plurality of projection areas based at least in part upon video data.
12. The system of claim 1, further comprising a controller that adjusts resolution of each of the outputs upon each of the plurality of projection areas.
13. A display device, comprising:
- a light source configured to generate light, wherein the light source comprises a switch and a plurality of color light sets, wherein each color light set is configured to generate a light beam having a color which is different than a color of the light beam generated by the other color light sets; and
- a plurality of projection outputs, wherein the switch is configured to receive each light beam and to divert each light beam in a predetermined sequential order to at least one of the plurality of projection outputs.
14. The device of claim 13, wherein each of the projection outputs comprises:
- an optical modulation device configured to selectively transmit light generated by the light source according to video data included in a video signal provided to the optical modulation device, and
- a projection lens system configured to output light transmitted by the optical modulation device along a projection path to form a projection image on an external receiving surface.
15. The display device of claim 14, further comprising:
- a base for containing the light source; and
- a plurality of positional interfaces configured to allow a plurality of projection outputs to be moved relative to the base, wherein each of the plurality of positional interfaces is coupled to the base and to a projection output in the plurality of projection outputs.
16. The display device of claim 14, further comprising a plurality of fiber optic cables configured to couple the switch to the each of the plurality of light sets.
17. The display device of claim 14, further comprising at least one fiber optic cables configured to couple the switch to the optical modulation device.
18. The display device of claim 14, further comprising a controller coupled to the optical modulation device, to the switch, and to the light source, wherein the controller is configured to sequentially provide light from the light source to the optical modulation device using the switch.
19. The display device of claim 18, wherein the controller comprises a keystone correction tool configured to reduce keystone distortion of at least one of the projection images, and the device further comprising an image detector coupled to the controller, wherein the keystone correction tool is configured to retrieve information associated with at least one projection image from the image detector.
20. The display device of claim 14, further comprising a controller coupled to the optical modulation device and to the light source, wherein the controller comprises an image coordination tool configured to coordinate projection images cast by the plurality of projection outputs.
21. The display device of claim 20, further comprising an image detector coupled to the controller, wherein the image coordination tool is configured to retrieve information associated with the projection images of the plurality of projection outputs from the image detector.
22. The display device of claim 20, wherein the image coordination tool comprises a plurality of resolution adjustment instructions configured to adjust a resolution of at least a portion of the projection images of the plurality of projection outputs.
23. The display device of claim 20, further comprising an eye sensor, wherein the image coordination tool comprises an eye detection module and a plurality of resolution adjustment instructions, wherein the eye detection module is configured to retrieve information of a direction of a line of vision from the eye sensor, and the plurality of resolution adjustment instructions are configured to adjust a resolution of predetermined portions of the projection images associated with the direction of the line of vision.
24. A computer-implemented method of projecting an image, comprising:
- employing a processor that executes computer-executable instructions stored on a computer readable storage medium to implement the following acts:
- producing an amount of light via a plurality of light sources;
- selectively directing a first portion of the light to a first optical modulation device;
- selectively directing a second portion of the light to a second optical modulation device;
- casting the image using the first portion of the light and the second portion of the light via at least one of the first optical modulation device or the second optical modulation device, wherein the casting includes displaying the image in accordance with video data.
25. The computer-implemented method of claim 24, wherein the directing of the first portion includes selectively directing the first portion of the light to the first optical modulation device for a first time frame; and wherein the directing of the second portion includes selectively directing the second portion of the light to the second optical modulation device for a second time frame, substantially equal to the first time frame.
26. The computer-implemented method of claim 24, wherein the directing of the first portion includes selectively directing the first portion of the light to the first optical modulation device for a predetermined first time frame; and wherein the directing of the second portion includes selectively directing the second portion of the light to the second optical modulation device for a predetermined second time frame, different from the predetermined first time frame.
27. The computer-implemented method of claim 24, wherein the casting includes displaying the image in accordance with gaming video content.
28. The computer-implemented method of claim 27, wherein the casting includes displaying the image in accordance with gaming video content of a multimedia console device.
29. The computer-implemented method of claim 27, wherein the casting includes displaying the image in accordance with gaming video content of a portable electronic device.
30. The computer-implemented method of claim 24, further comprising adjusting a resolution of the image.
31. The computer-implemented method of claim 24, further comprising aligning a plurality of portions of the image.
32. The computer-implemented method of claim 24, wherein the plurality of light sources are laser-based sources.
33. The computer-implemented method of claim 24, wherein the plurality of light sources are LED sources.
34. A system for projecting an image, comprising:
- means for switching light from a plurality of light sources to a plurality of projection outputs; and
- means for configuring the light, wherein the configured light defines a plurality of images that corresponds to each of the plurality of projection outputs.
35. The system of claim 34, further comprising means for displaying each of the plurality of images upon a surface.
36. The system of claim 34, further comprising means for displaying each of the plurality of images upon a plurality of surfaces.
37. The system of claim 34, further comprising:
- means for displaying each of the plurality of images; and
- means for aligning each of the plurality of images as a function of the others.
38. The system of claim 37, further comprising means for adjusting a resolution of a subset of the plurality of images.
39. The system of claim 34, wherein the means for switching light includes means for sequentially switching from a first mapping of the plurality of light sources to the plurality of projection outputs to at least a second mapping of the plurality of light sources to the plurality of projection outputs.
Type: Application
Filed: Jun 3, 2009
Publication Date: Dec 9, 2010
Applicant: HONEYWOOD TECHNOLOGIES, LLC (Los Altos, CA)
Inventor: William J. Plut (Los Altos, CA)
Application Number: 12/477,534
International Classification: H04N 5/74 (20060101); G03B 21/14 (20060101); G09G 5/12 (20060101); G02F 1/00 (20060101);