Abstract: A projector includes a lens driving unit that drives a lens unit including a projection lens; a reception unit that receives instruction information that is input; and a control unit that controls a lens shift by the lens driving unit based on lens shift instruction information with respect to the projection lens, which is received by the reception unit, in such a manner that zoom, which is performed by the lens driving unit based on zoom instruction information adjusting angle of view with respect to the projection lens, is performed in a predetermined state for a first image which is projecting in a state that a central position of the first image is different from a basis position of the zoom.

Abstract: A projector has a storage unit storing data on a plurality of different light emission patterns each occurring in a period based on a plurality of different-colored lights, wherein each light emission pattern corresponds to a respective one of a plurality of different projection conditions of a color image. An acquiring unit acquires a present projection condition of the color image, and a controller controls a light emission operation of the plurality of different-colored light emitting elements in the period in accordance with data on a light emission pattern corresponding to the present projection condition of the color image.

Abstract: A projector displays an image on a projection surface. The projector has a zoom adjusting module and a keystone correcting module. The zoom adjusting module adjusts zoom level of a zoom lens for enlarged projection of image light. The keystone correcting module corrects trapezoidal distortion of the image displayed on the projection surface by means of forming the effective panel image in a revised image formation area, the revised image formation area being part of the image formation area of the panel surface.

Abstract: A projector includes a lens driving section that drives a lens section having a projection lens, an accepting section that accepts first control value indication information indicating a first control value including a drive instruction value of the lens section, a determining section that determines whether a drive instruction direction for the lens section is a first drive direction that is same as the last drive direction or a second drive direction that is different from the last drive direction, and a control section that drives the lens section by using a second control value whose drive instruction value is greater than the drive instruction value of the first control value in case that the drive instruction direction is the second drive direction.

Abstract: A dual TIR prism has an input prism, a wedge prism, an output prism, and a reflective polarizer. The dual TIR prism is configured to receive an optical beam at an entrance surface, to pass the first polarization direction of the received optical beam from a second exit surface, and to output the second polarization direction of the received optical beam from a first exit surface of the input prism.

Abstract: An image display apparatus detects a projection angle of a projection unit that projects a screen image on a screen and is capable of vertically changing the projection angle, and corrects trapezoidal distortion of the screen image according to the projection angle. The image display apparatus changes the amount and direction of trapezoidal distortion correction based on the projection angle. The image display apparatus also determines whether a projection mode is projection upward to a wall or projection to a ceiling and changes the direction of trapezoidal distortion correction for projection upward to the wall and projection to the ceiling. Specifically, for projection upward to the wall, a correction factor is positive and an upper edge portion of the screen image is compressed for correction; and for projection to the ceiling, a correction factor is negative and a lower edge portion of the screen image is compressed for correction.

Abstract: A method for projection includes generating a pattern of illumination, and positioning an array of lenses so as to project different, respective parts of the pattern onto a scene.

Abstract: A method for creating an interactive display in which users/players can form the projection screen. The method includes providing granular display material, such as a layer of sand in a container, and storing a guide image and a display image in memory of a control system. Then, a projector is first operated to project the guide image on an upper surface of the display material. After a sculpting period or in response to a user or operator provided trigger, the method includes second operating the projector to project the display image on the upper surface which has been sculpted by the user into a 3D projection surface or screen during the first operating step. The projected guide image may include an outline of an object, and the display image may include an image element that is mapped to the location of the outlined object.

Abstract: Projector alignment in a multiple-projector projection system is checked by determining a location of at least a portion of a boundary of an image field projected by at least one of the projectors and comparing the determined location of the at least the portion of the image field to a system-calibrated reference location of the at least the portion of the boundary of the image field.

Abstract: A method and an apparatus for displaying 3D images are disclosed. 2D images are projected from multiple points to a surface with narrow diffusion characteristics, thus it is possible to get a 3D light field with arbitrary angular dependence. According to the invention, the projectors (10) do not target particular screen (12) points. The projectors (10) are directed to the screen (12) with no special positioning, however from the bunch of light beams present, pertaining to the large number of pixels in the projected images, it is possible to select and define a pixel-wise precise 3D light-field through a calibration process. A novel calibration method and device are also described for calibrating 3D display systems, the device being equipped with proper image sensor(s) and a control system.

Abstract: A projection apparatus, an illumination module and a brightness adjusting method for the projection apparatus are provided. The projection apparatus comprises the illumination module and the actuator. The illumination module comprises a luminous element. First, the actuator drives the luminous element to move from the first position to the second position to detect the first brightness and second brightness generated by the luminous element. When the first brightness is higher than the second brightness, the actuator is adapted to drive the luminous element to the first position. Thereby, the brightness of a projection image generated by the projection apparatus can be adjusted to an optimal value.

Abstract: A polarization image capturing section 103 obtains a first polarization image containing polarization information. A polarization information obtaining section 104 obtains first polarization information from the first polarization image. An illumination control section 102 changes an illumination section 101 and again obtains a second polarization image by means of the polarization image capturing section 103. The polarization information obtaining section 104 obtains second polarization information from the second polarization image. A light source dependency estimation section 105 obtains light source dependency from the first and second polarization information obtained from the first and second polarization images. An area dividing section 106 performs an area division by using the polarization information and light source dependency information.

Abstract: A method and apparatus for bitstream modulation of an infrared light source used by an optical sensor in a stereoscopic projection system, combined with a bitstream filter on the receiver electronics.

Abstract: The invention provides a system and method that reduces the tediousness of the manual alignment process. Users select correspondences between projectors or components of a projector, to form a common coordinate. Using models of the display system, and projectors, the common coordinate system can be mapped quickly to the entire display. The process avoids a need to measure screen points, and allows the user to move significantly fewer points. Alternatively, the invention allows introduction of machine-vision style algorithms into manual calibration techniques to improve performance. This overcomes the tediousness of prior systems by introducing models of the display into the manual alignment process, allowing selection of a small number of points on each projector, and avoiding selection of precisely measured screen points. The system conversely finds correspondences between projectors, allowing mapping of the projectors into a common coordinate system, and quick warping of the coordinate system to the screen.

Abstract: A projector and a method for operating the projector are provided, in which an optical module alternately emits first image information and second image information at intervals, and an optical path switch is installed to be switched on or off from a traveling path of the first and second image information emitted from the optical module.

Abstract: An optical micro-projection system comprising the following components: at least one laser light source (200, 400, 402, 600); at least one movable mirror (102, 103, 203) for deviating light from said light source to allow generation of images on a projection surface (104, 301, 303, 306, 603); a self mixing module for measurement of the distance (604) between the projection source and a projection surface, said self mixing module comprising:—at least one photodiode (401, 601) for monitoring the light emission power of the laser light source;—an optical power variation counter for counting optical power variations (605); successive displacements of said mirror allowing the self mixing module providing successive projection distance measurements of a plurality of points of said projection surface. A projection method for optical micro-projection system and a distance measurement method are also provided.

Abstract: Method to display an image using four or more primaries having different spectral distributions that are distributed into three groups of primaries, wherein, in a visual color space, all primaries belonging to the same group have the same visual color and are metamehc. Each image being got from a combination of three primary images and each primary image being associated with each visual color of a group, the different primaries of each group are spatially or sequentially distributed over the primary image associated with this group, then allowing an efficient anti-copy protection based on metamerization of images, without any supplemental video processing.

Abstract: A method for positioning a light modulation element of a projector. The projector including a first light modulation element unit having first through third light modulation elements and a second light modulation element unit having fourth through sixth light modulation elements. The projector further including a combining system for combining a first image light supplied from the first light modulation element unit and a second image light supplied from the second light modulation element unit and supplying the combined light, and positioning the first light modulation element unit and the second light modulation element unit such that color of combined light of color lights obtained from the first light modulation element, the second light modulation element, and the sixth light modulation element becomes a predetermined color.

Abstract: Provided is a system for adjusting an image of a beam projector using a camera attached remote controller and a method thereof. The system for adjusting images of a beam projector according to the present invention includes: a remote controller photographing test images projected on a screen and detecting pattern images from the photographed test images and generating control information including at least one parameter necessary to adjust the images through the detected pattern images; and a beam projector receiving the control information for adjusting images from the remote controller and adjusting the input image by using parameters included in the received control information and outputting them to the screen. Therefore, the present invention adjusts colors and geometrical shapes of images at a user's viewpoint, thereby making it possible to improve the satisfaction of user and implement the system in various forms.

Abstract: A stereo 3D projector with the ability to provide the native lumen output of the projector when not in 3D mode. This is accomplished by using two rotating polarizing filters at least partially overlapping, each with at least two or more segments, some of which are fully transparent and at least some of which are polarized linearly or circularly.

Abstract: A scanning projector for projecting an image comprising multiple wavelength signals is disclosed. Embodiments of the present invention include a beam combiner comprising a planar lightwave circuit having a plurality of surface waveguides arranged to define a plurality of input ports, a mixing region, and an output port. Each input port receives a different wavelength signal and provides it to the mixing region. The mixing region combines the plurality of wavelength signals into a single composite output beam that is scanned over a region to create an image in a region. In some embodiments, the projector (1) interrogates image points in the region using a first wavelength signal to determine a measurand and (2) projects an image over the image points of the region using a second wavelength signal, wherein each image point is illuminated with the second wavelength signal based on a measurand at that image point.

Abstract: A projection device with a brightness adjustment function includes a reflective display, a light source, a lens module, a power supply unit, a light detection unit and a power controller. The light source emits light to the reflective display. The lens module projects the images displayed by the reflective display. The reflective display is periodically rotated for reflecting the light to the lens module. The power supply unit supplies power for the light source. The light detection unit acquires a digital value of a portion of the light reflected by the reflective display that is not received by the lens module, and compares the digital value with a predetermined digital value to generate a control signal. The power controller adjusts power from the power supply unit to the light source according the control signal until the digital value matches the predetermined digital value of the light.

Abstract: In at least one embodiment of the disclosure, a projector comprises an imaging unit that photographs a projection surface and acquires a first photographed image during a projection of a featured image at a first time point and acquires a second photographed image during the projection of the featured image at a second time point different from the first time point. An image processing unit generates a reference image based on the first photographed image and generates a comparative image based on the second photographed image. A movement detecting unit detects a change in a relative position of the projector with respect to the projection surface by using the reference image and the comparative image generated by the image processing unit.

Abstract: A projection device with a brightness adjustment function includes a display, a light source, a lens module, a power supply unit, a light detection unit and a power controller. The light source emits light to the display. The lens module projects the images to be displayed by the display. The power supply unit supplies power for the light source. The light detection unit acquires a digital value of a portion of the light from the light source that is not received by the display, and compares the digital value with a predetermined digital value to generate a control signal. The power controller adjusts power from the power supply unit to the light source according the control signal until the digital value matches the predetermined digital value of the light from the light source.

Abstract: A projection display device including: an image projection section configured to project an image toward a projection surface; an imaging section configured to shoot the image projected on the projection surface; a location specifying section configured to specify a location of a position indication light based on a shot image by the imaging section; and a display control section configured to set a projection range of the image to a range including an image area corresponding to the location specified by the location specifying section, and to alter the projection range of the image in accordance with the set projection range.

Abstract: A method to display images using four or more different primaries having different spectral distributions wherein, in the LMS color space, at least two of these primaries have the same L coordinates and the same M coordinates; thank to the invention, different metamers, when being legally displayed, will be not only perceptually indistinguishable to a viewer with normal color vision but also indistinguishable by most of the viewers with non-normal color vision.

Abstract: An image display system includes an image display apparatus and an image signal supply apparatus which are connected to each other via an interface and displaying an image based on an image signal supplied from the image signal supply apparatus on the image display apparatus, wherein the image signal supply apparatus includes: an imaging unit taking an image of a subject; a movable holding unit holding the imaging unit and having a first state and a second state other than the first state; a state detector detecting which state of the first state and the second state the movable holding unit has; and an image signal supply apparatus controller transmitting the image acquired by the imaging unit and the detection result of the state detector via the interface, and wherein the image display apparatus includes: a state detection result acquiring unit acquiring the detection result of the state detector transmitted from the image signal supply apparatus; and an image display apparatus controller displaying a pred

Abstract: A projector array includes a plurality of projectors, which together project images into a projection area on a projection surface. Aspect ratios are normalized for all of multiple images designated for display. The normalized aspect ratios are aligned at a common central point. An aspect ratio of a minimum rectangular shape is determined that will encompass all of the aligned aspect ratios. A maximum rectangular projection area is determined within the projection area having the same aspect ratio as the minimum rectangular shape. The center of the maximum rectangular area is designated as a centralization point. Each of all of the multiple images is sequentially projected into the projection area. Each image is scaled for display at its aspect ratio and is displayed centered at the centralization point.

Abstract: An apparatus and method for stereoscopic 3D image projection and viewing using a single projection source, alternating polarization, and passive eyewear. This approach is applicable to frame sequential video created using existing 3D graphics APIs, as well as other video signal formats, and is compatible with existing digital light processor (DLP) technology for both front and rear projection systems. A alternating polarizer filter actuator in the form of a closed feedback loop with pulse width modulated control is used to modulate the projected image. A preferred embodiment enables an existing DLP projection system to be enhanced with 3D capability.

Abstract: An input device providing users with a pointing capability includes a sender portion and a receiver portion. The sender portion is adapted to be manipulated by a user to specify a target point within a target area. The sender portion projects a light beam including a pattern on to the target area. A receiver portion includes one or more sensor units located in or near the target area. At least some of the sensor units receive a portion of the light beam regardless of the location of the target point within the target area. A processing unit in the receiver portion analyzes the portions of the light beam received by one or more sensor units to determine an attribute of the target point. The attribute can be the location or relative motion of the target point. The receiver portion may be integrated with a display device.

Abstract: A projection type video display apparatus includes a projection lamp and a video signal processing circuit which performs video processing to an input video signal. The projection type video display apparatus includes means for performing an initializing process of the video signal processing circuit in a period until brightness of the projection lamp reaches brightness enough to project video since the projection lamp is lit and in a period except for a period during which lamp lighting noise is generated immediately after the projection lamp is lit.

Abstract: A projection type display device that displays an image with projected light onto a target to he projected, including a first sensor (12) that detects reflected light of the projected light; a second sensor (13) that detects an infrared ray in a predetermined range in an optical path direction of the projected light; and a light amount deciding section (23) that decides an amount of the projected light based on the amount of reflected light detected by the first sensor (12) and an amount of change of the infrared ray detected by the second sensor (13).

Abstract: An electricity storage section that stores power from an external power source and supplies the stored power as operating power is provided, and, when an interruption of the external power source to a projection display device is detected, control to reduce the power consumption of a device main body and control to drive an exhaust port shutter so that it is closed by the power supplied from the electricity storage section are performed.

Abstract: A mobile projector and method are provided for performing Auto Focusing (AF). The mobile projector includes a projection system for projecting an image onto a screen, a camera module for receiving an input image which is the projected image, an edge detection logic for detecting an edge value of the input image, and a controller for controlling the edge detection logic to detect the edge value of the input image, and controlling focusing of the mobile projector based on the edge value.

Abstract: A method of and apparatus for turning off a projector. The method and apparatus identify a condition to the effect that the projector should not be powered on, identify a condition to the effect that the power draw of the projector is above a threshold value, and instruct the projector to turn off.

Abstract: A display device (100) of the present invention has a first switch (3) and a second switch (4) on an upper surface of its casing, and includes a control circuit (18) for controlling the first switch (3) and the second switch (4) and a light source (19) inside the casing. The control circuit (18) performs control so that the light source (19) is turned on when the second switch (4) is pressed after a predetermined period of time has passed from when the first switch (3) was pressed. Thereby, the display device (100) of the present invention prevents entering of a person into a projection area before projection of video, and controls inadvertent start-up.

Abstract: A 3D stereographic projection apparatus comprises an input for receiving stereographic image data that includes sync signals corresponding to image streams in the image data. A digital light projector projects the stereographic image data. A motor driven rotating filter has a marker disposed thereon positioned in the path of the projected stereographic image data. The motor driven rotating filter separately polarizes the image streams in the stereographic image data. A motor drive circuit, coupled to the input, receives the sync signals and synchronizes a rotation of the filter with the sync signals. A tach sensor, comprising a light transmitter and detector coupled to the rotating filter, detects the marker and outputs marker signals indicating that the marker is detected.

Abstract: An apparatus that presents a projection image has a screen and plural projectors, each of which projects a section of the projection image onto the screen. The apparatus has a projected-section-determining unit that determines as a projected section the section of the projection image, based on an input image signal, corresponding to a part of the screen onto which each of the projectors projects the section of the projection image. The apparatus has an image-signal-generating unit that generates an image signal corresponding to the section of the projection image which each of the projector projects onto the part of the screen, based on the input image signal and the projected section determined by the projected-section-determining unit, and a projectors-controlling unit that controls the projectors to adjust centers and/or ranges of the projections by the projectors based on the projected section determined by the projected-section-determining unit.

Abstract: A projection display apparatus displays a test pattern image formed of at least parts of three or more line segments defining three or more intersection points. The projection display apparatus computes a positional relationship between the projection display apparatus and the projection surface, based on the three or more intersection points. The test pattern image has a distortion in an opposite direction to a direction of the lens.

Abstract: Described herein is processor for providing image data signalling to a projector. The provided image data signalling represents an image to be projected by the projector. The processor comprises both an input to receive movement signalling associated with movement of the projector, and an output configured to provide image data signalling to the projector. The processor is also configured to provide image data signalling to the projector based on received movement signalling.

Abstract: The present invention relates to a method for controlling a projector. More particularly, the present invention relates to a method for controlling a projector that enables a projector to operate even when the temperature of the ambient air exceeds a predetermined temperature, and prevents the operation of the projector from being forcibly terminated even when the inside of the projector overheats beyond a predetermined temperature.

Abstract: According to one embodiment, an image projector has a spatial light modulator (SLM) adapted to modulate illumination from a laser with a spatial pattern such that the modulated illumination projects an image on a viewing screen. The image projector further has an optical diffuser located on an optical path between the laser and the SLM. The laser is adapted to illuminate the SLM through the optical diffuser to create an illuminated area at the SLM. The optical diffuser is adapted to introduce an angular spread into the light transmitted therethrough. The image projector is adapted to move the illuminated area with respect to the SLM to mitigate speckle in the projected image.

Abstract: An electronic device comprises a processor, a light source, and a controller coupled to the light source. The controller comprises logic to cycle the light source between an active state and an inactivate state at with a pulse duration that measures between 30 milliseconds and 100 milliseconds and jitter a time onset of the active state by a quasi-random time that measures between 0 and 30 milliseconds for one or more cycles. Other embodiments may be described.

Abstract: A projector displays an image on a projection surface. The projector has a zoom adjusting module and a keystone correcting module. The zoom adjusting module adjusts zoom level of a zoom lens for enlarged projection of image light. The keystone correcting module corrects trapezoidal distortion of the image displayed on the projection surface by means of forming the effective panel image in a revised image formation area, the revised image formation area being part of the image formation area of the panel surface.

Abstract: In a system and method of image display, an image projector is positioned to back project (or rear project) an image on one or more platform doors disposed between a passenger platform of a train or people mover station and a pathway of the train or people mover. The image projector is positioned on the pathway side of the one or more platform doors. The image projector back projects the image on the one or more platform doors such that the image is diffusedly transmitted through them for observation by passengers on the platform side of the station. The back projected image is oriented such that characters or words in the image have a proper left-to-right, or right-to-left, orientation for reading by passengers on the platform side of the station.

Abstract: A method for creating an interactive display in which users/players can form the projection screen. The method includes providing granular display material, such as a layer of sand in a container, and storing a guide image and a display image in memory of a control system. Then, a projector is first operated to project the guide image on an upper surface of the display material. After a sculpting period or in response to a user or operator provided trigger, the method includes second operating the projector to project the display image on the upper surface which has been sculpted by the user into a 3D projection surface or screen during the first operating step. The projected guide image may include an outline of an object, and the display image may include an image element that is mapped to the location of the outlined object.

Abstract: A method corrects trapezoid distortion of projected images using a projector. The projector includes a projection lens, a driver device, an image capturing device, and a storage system. A rectangular picture is read from the storage system and projected on a projection area by the projection lens. The method controls the image capturing device to capture an image from the projection area when the projection lens increases one trapezoid row correction grade, and corrects each trapezoid row of the captured image if the captured image has trapezoid rows. The method further controls the image capturing device to capture an image from the projection area when the projection lens increases one trapezoid column correction grade, and corrects each trapezoid column of the captured image if the captured image has trapezoid columns.

Abstract: A projector includes a projection unit, an imaging unit, a correction control unit acquiring first correction information based on a first captured image acquired by capturing a distortion detection image projected onto a projection surface, and a distortion correction unit performing distortion correction based on the first correction information.

Abstract: An optical system that projects a real image to a location in free space and includes one or more features located along the optical path that enhance the viewability of the real image. The optical system includes a converging element for converging a portion of source light so as to form the real image. One viewability-enhancing features is the use of a broadband reflector-polarizer having high transmitting and reflecting efficiencies. Another viewability-enhancing features is the use of polarizing elements having substantially matched bandwidth responses and/or comprising an achromatic design. An additional viewability-enhancing feature is the use of a wide-view film to increase the viewing angle of the image.

Abstract: The image display system comprises laser light source units (2 to 4) for emitting green, red and blue laser beams, a laser output control unit (52) and a drive control unit (53). Upon detecting an overlapping in the output timing of the laser beams of two or more of the laser light source units, the drive control unit ceases the application of the drive current to at least one of the two or more laser light source units according to the output control signal.