Abstract: The invention generally relates to the display of images viewable from any direction and devices therefor. In some aspects, the invention provides an apparatus for displaying a hologram-like image. The apparatus includes an inverted, truncated pyramid bearing semi-reflective facets visible from outside of the apparatus in all horizontal directions. A base frame supports the truncated pyramid, houses an imaging system, and provides image source surfaces that display images beneath each of the facets to be reflected by each of the facets.

Abstract: An information processor receives, from each of a plurality of projectors, the number of pixels to be projected and the number of pixels of a region to be superposed of the projector, and the information processor calculates the number of pixels of an integrated image based on the number of pixels to be projected and the number of pixels of a region to be superposed of each projection screen of the projectors.

Abstract: Provided is a projector capable of suppressing deterioration of a portion of a projection portion irradiated with a laser beam while improving brightness. This projector is formed to deviate optical axes of laser beams emitted from a plurality of laser beam generation portions respectively from each other so that the laser beams emitted from the plurality of laser beam generation portions respectively do not concentrate on one point of a projection portion.

Abstract: A display apparatus includes a display unit that time-divisionally displays a plurality of view point images in N divisions, N being an integer equal to or more than 2, a backlight that irradiates the display unit with image display light, and a separation unit that separates M view point images displayed in the same time slot in the display unit, M being an integer equal to or more than 2. The backlight controllably switches the exit direction of light time-divisionally in synch with the timing of time division display by the display unit, the backlight controllably switching the exit direction of light between N directions.

Abstract: Image generation systems and image generation methods are described. In one aspect, an image generation system includes an attachment system configured to secure the image generation system to a head of a user in a position to be observed by the user; an illumination system having an exit pupil located at infinity and configured to emit light; a light modulator configured to receive the light from the illumination system and to selectively reflect at least some of the received light which corresponds to an image; a control system coupled with the light modulator and configured to access data content regarding the image, to generate a plurality of control signals according to the accessed data content, and to output the control signals to the light modulator to control the selective reflection of at least some of the received light; and an output optical system configured to direct the selectively reflected light towards an observer's eye to be observed by the observer.

Abstract: A 3D image display device including a position detector, a display panel, a barrier panel, and a barrier panel controller. The position detector detects a position of a viewer and generates a selection signal. The display panel includes a plurality of pixels and alternately displays a left-eye image and a right-eye image. The barrier panel includes a light transmitting portion and a light blocking portion. The barrier panel controller controls a width of each of the light transmitting portion and the light blocking portion. The barrier panel is operated in one of a first mode, a second mode, and a third mode.

Abstract: This invention discloses a combined-screen-based multi-pitching angle suspended panoramic space 3D display device comprising: a combined deflective diffusing screen, a high speed projector, an image control module, a rotation detecting module, a motor and a drive mechanism. The high speed projector projects the composite images of the 3D objects of different pitching angles and horizontal 360° FOV to different areas of the combined deflective diffusing screen. Each area of the combined deflective diffusing screen controls the deflecting angle and the scattering angle in the vertical direction and the diffusing angle in the horizontal direction, ensuring that the eyes of the surrounding viewers of different height levels can see the 3D images corresponding to their respective positions, representing the 3D scene suspended over the combined deflective diffusing screen.

Abstract: This invention discloses a multi-pitching angle suspended space 3D display device with 360° FOV, comprising: a transmitted composite deflective diffusing screen, a high speed projector, an image generator, a detecting module and a rotating drive mechanism. The high speed projector projects the composite images of the 3D objects of different pitching angles and horizontal 360° views to the composite deflective diffusing screen that rotates at a high speed. The composite deflective diffusing screen is able to control the vertical deflecting and scattering angles and horizontal diffusing angle for incident rays with different angles, allowing the surrounding viewers at different height levels to see the images corresponding to their viewpoints, making the displayed 3D objects suspended over the composite deflecting scattering screen, of which the position does not change as the height of the viewpoint changes.

Abstract: An autostereoscopic projection device comprises a light source providing a light, a light scanning module, a light transmitting module, a light combining module including a first light combining element, a spatial light modulator module including a first spatial light modulator element, and a lens. The light scanning module includes a reflective surface and an actuating device capable of deflecting the reflective surface. The normal vector of an incident surface of the first light combining element is coplanar with the normal vector of a reflective surface of the first spatial light modulator element, and the coplanar plane is perpendicular to a disposition plane of the projection device. The light provided by the light source module is transmitted through the light scanning module, the light transmitting module, the light combining module and the spatial light modulator module sequentially and then leaves the projection device through the lens.

Abstract: A projector includes a lamp that emits projection light to project 3D picture, in which a right eye image and a left eye image are represented in a time division manner, to an object, a synchronization signal transmission section which transmits shutter synchronization signal to glasses having a right eye shutter and a left eye shutter to control the opened state or the closed state of the right eye shutter and the left eye shutter, based on the signal indicating a displaying period of the right eye image and the left eye image of 3D picture, and a lamp drive section that supplies AC current having peak overlapping with a period when the right eye shutter of the glasses is in the opened state and peak overlapping with a period when the left eye shutter of the glasses is in the opened state to the lamp, based on the signal.

Abstract: A projection-type display system includes: a projection-type display apparatus that alternately switches images for the left eye and images for the right eye and projects the images onto an object; and an opening and closing control device that receives a control signal based on the display states of the images projected onto the object by the projection-type display apparatus and controls switching apertures of stereoscopic image viewing glasses corresponding to left and right eyes, wherein the projection-type display apparatus is connected to one end of a LAN cable and the opening and closing control device is connected to the other end of the LAN cable.

Abstract: A liquid crystal display device (1) includes a liquid crystal panel having a plurality of pixels disposed in a matrix form, and a patterned retarder having retarder plates (RR) and retarder plates (RL) formed at positions corresponding to odd-numbered rows and even-numbered rows, respectively, of the liquid crystal panel. Among sub pixels disposed in the pixels positioned in the n-th row, a sub pixel electrode of a boundary-proximity sub pixel, which is positioned closest to a boundary between the associated retarder plate (RR) and the associated retarder plate (RL), is connected to an auxiliary bus line via a transistor having a gate electrode connected to a gate bus line in the (n?1)-th or prior row. In the second display mode, gate signals are sequentially supplied to the gate bus lines in order from the first to the N-th rows, and, in the first display mode, gate signals are sequentially supplied to the gate bus lines in order from the N-th to the first rows.

Abstract: A method of projecting an image is provided. The method includes the step of providing a first light source, the first light source emitting light at a first polarization. A second light source is provided adjacent the first light source, the second light source emitting light at a second polarization. A digital mirror device is provided (DMD), the DMD having a first axis. A mirror is provided optically disposed between the first light source, the second light source and the DMD, the mirror being adjacent the DMD. A first light is emitted from the first light source. The first light is reflected with the mirror onto the DMD. A second light is emitted from the second light source after the first light is emitted. The second light is reflected with the mirror onto the DMD.

Abstract: A polarization controller adapted to output respective projection lights for a right-eye image and a left-eye image that are incident from a projector to a screen in different polarization directions, includes: a liquid crystal device adapted to change the polarization directions of the projection lights; and a controller adapted to control the liquid crystal device so that the respective projection lights for the right-eye image and the left-eye image have different polarization directions, wherein the controller performs control for mirror-reversing the polarization directions of the projection lights in the liquid crystal device according to a control signal indicating whether the projector performs mirror reversal of the right-eye image and the left-eye image, input from the projector.

Abstract: A projector includes: a discharge lamp; a discharge lamp driving unit that drives the discharge lamp by supplying a driving power to the discharge lamp through supply of a driving current thereto; and a control unit that controls the discharge lamp driving unit based on plural operating modes in which maximum values of the driving power are different from one another, wherein the control unit switches the operating mode through a transition period and controls the discharge lamp driving unit so that an average value of a frequency of the driving current in the former half of the transition period becomes larger than an average value of a frequency of the driving current in the latter half of the transition period.

Abstract: Various embodiments relate to a method for projecting a 3D image onto a projection surface, which includes a first and a second partial images for a right and left eyes of a first viewer, respectively. A first illumination beam, which has electromagnetic radiation of a predetermined first property, is produced depending on first image data. A second illumination beam, which has electromagnetic radiation of a predetermined second property different from the first property, is produced depending on second image data. The first and the second illumination beam are deflected towards the projection surface such that the first and the second illumination beams produce a first and a second beam spots thereon, respectively. The first and the second beam spots are moved across the projection surface such that the first and the second partial images are shown with the aid of the first and the second beam spot, respectively.

Abstract: Disclosed is a three dimensional (3D) continuous display system based on a plurality of projexels. Each projexel may include of a plurality of light emitting devices. Each light emitting device may project a directional beam of light that spans an angular range. The sum of the angular ranges of each beam of light total an angular range for the projexel. Each projexel is also associated with a set of transition angles. The transition angles may be defined by the angle where two beams coincide. The projexels are configured such that sets of transition angles between adjacent projexels are offset.

Abstract: Disclosed is a digital virtual object projector capable of projecting an auto-stereoscopic, 3D, high definition, virtual object or motion graphic upon three-dimensional space. Producing a collective, interactive, virtual platform viewable from multiple angles, the Holoscope is adaptable to a variety of digital imaging applications and can support traditional imaging formats. The Holoscope can project an auto-stereoscopic, 3D object at an improved resolution, frame rate, size, and cost than was heretofore possible. The Holoscope offers a new form of auto-stereoscopic display and spatially augmented, virtual environment.

Abstract: A discharge lamp driving device includes: a direct-current power supply section (a power supply section) that controls a current of power to be supplied to a discharge lamp from input power, and outputs the current; a voltage detecting section that detects a lamp voltage (a drive voltage) of the discharge lamp; and a control section that controls a modulation factor of a lamp current (a drive current) on which amplitude modulation has been performed, the lamp current (the drive current) which is supplied to the discharge lamp from the direct-current power supply section (the power supply section), in accordance with the detected lamp voltage (drive voltage) of the discharge lamp.

Abstract: A projector includes a lamp that emits projection light to project 3D picture, in which a right eye image and a left eye image are represented in a time division manner, to an object, a synchronization signal transmission section which transmits shutter synchronization signal to glasses having a right eye shutter and a left eye shutter to control the opened state or the closed state of the right eye shutter and the left eye shutter, based on the signal indicating a displaying period of the right eye image and the left eye image of 3D picture, and a lamp drive section that supplies AC current having peak overlapping with a period when the right eye shutter of the glasses is in the opened state and peak overlapping with a period when the left eye shutter of the glasses is in the opened state to the lamp, based on the signal.

Abstract: An external polarization conversion device used for a projector includes a first element which converts light from the projector to polarized light in a uniform polarization direction, and a second element which is arranged in a position subsequent to the first element in such a way that there is a space between the first element and the second element and which converts the polarized light from the first element to predetermined polarized light that is different from the polarized light from the first element.

Abstract: An aerial projection display project an image of an object to a remote location for viewing. The display includes a pair of spherical, parabolic, or elliptical reflectors positioned and oriented relative to one another such that, when the object is placed at one or more predetermined locations, an image of such object is transmitted to the first reflector of said pair, reflected by said first reflector to the second reflector, and refocused by the second reflector as an undistorted 3-D image. In a second embodiment, the reflectors are paraboloid reflectors sharing a common axis of revolution. In another embodiment, the reflectors are elliptical reflectors each having a pair of foci. The foci lie along a common axis, and one of said foci is common to both reflectors.

Abstract: In the present invention, high-quality 3D images can be displayed using a simple configuration. A rotating screen, comprising a lens which is set at a position such that the rotational center of the lens is eccentric in relation to a light axis, is rotationally driven. A plurality of projectors are disposed offset from the rotational center axis of the rotating screen.

Abstract: A system may comprise a selectively transparent projection device for projecting an image toward an eye of a viewer from a projection device position in space relative to the eye of the viewer, the projection device being capable of assuming a substantially transparent state when no image is projected; an occlusion mask device coupled to the projection device and configured to selectively block light traveling toward the eye from one or more positions opposite of the projection device from the eye of the viewer in an occluding pattern correlated with the image projected by the projection device; and a zone plate diffraction patterning device interposed between the eye of the viewer and the projection device and configured to cause light from the projection device to pass through a diffraction pattern having a selectable geometry as it travels to the eye.

Abstract: A method for automatic delivery of consistent imagery in a multi-projector system includes the steps of dividing the projectors into a plurality of sub-groups of projectors, each projector oriented to project a sub-frame to a sub-group display location, and adjusting the output of each projector in each sub-group to provide selected target display characteristics across all sub-groups.

Abstract: A stereo display system including a plurality of projection apparatuses and a screen module is provided. The projection apparatuses project a plurality of image beams. The screen module is disposed in front of the projection apparatuses, wherein the image beams are transmitted toward the screen module. The screen module includes a light diffusion layer and a beam splitting layer. The light diffusion layer has at least one diffusion direction, and the light diffusion layer diffuses the image beams with a diffusion angle. The light diffusion layer is disposed between the beam splitting layer and the projection apparatuses, wherein each of the image beams is divided into a plurality of sub image beams by the beam splitting layer. The sub image beams of each image beam transmit with different angles, such that the image beams form a plurality of stereo image viewing zones after passing through the screen module.

Abstract: A phosphor wheel includes a glass, a first phosphor agent and a first filter. The glass has a first region and the first phosphor agent is coated on the first region for converting a first color light into a second color light. The first filter is disposed next to the first region for filtering at least a portion of the first color light and a first light beam of the second color light, so that a second light beam of the second color light is transmitted through the first filter. The second color light is yellow light, the first phosphor agent is yellow phosphor agent, and the first filter is a red light filter. The present invention achieves the advantages of decreasing the fabricating cost, increasing the brightness of the red light with increasing of driving current and the whole brightness of the illumination system, and improving the image quality.

Abstract: A color wheel module and a projector apparatus using the same are disclosed. The color wheel module has a driving device, a polarity of color filters and a switching device. The color filters are disposed on and driven by a rotary axle of the driving device. The switching device is disposed on the side of the driving device. The driving device is capable of rotating the rotary axle and driving the color filters of the color wheel module. While the projector apparatus is in a planar image mode, a lock rod of the switching device will lock the rotary axle of the driving device to stop the operation of the driving device. While the projector apparatus is in a stereoscopic mode, the lock rod will release the axle so that the driving device is turned to drive the color filters.

Abstract: Methods and systems are described herein which produce polarization-independent full color images suitable for rear-projection television sets and other multimedia displays. The system uses illumination with R, G, B light from two different light sources for each color. A viewer wears glasses with narrowband optical filters, preferably holographic filters. The R, G, B light from the light sources is slightly offset at each of the 3 emission wavelengths, with one set of R, G, B light being filtered by the holographic filter in front of the left eye of the, and the other set of R, G, B light being filtered by the holographic filter in front of the viewer's right eye.

Abstract: A stereoscopic image projection apparatus includes a projection portion emitting laser beams, a microlens array diffusing the laser beams from the projection portion, and a plane-symmetric imaging element projecting a stereoscopic projection image onto a position plane-symmetric to the microlens array by internally reflecting the laser beams from the microlens array and emitting the laser beams to an opposite side to the microlens array. The microlens array is arranged to be inclined with respect to the plane-symmetric imaging element.

Abstract: A 3D image convertible projection system for viewing an image broadcasted as a 3D image or an image from a 3D DVD, etc., using a general projector in which a general projector receives a left-eye image and a right-eye image for the 3D image in one frame and projects them toward a projection lens. The 3D image projection system is configured so that the left-eye image and the right-eye image having a 2D form, which are projected from a general projector, are magnified so that a vertical magnification rate is 0 and a horizontal magnification rate is 1.5-2.5 times and at the same time divides the images into leftward and rightward directions. The optical system includes a first and second curved surface mirrors or a left and right symmetric eccentric curved surface lens, and a second set of mirrors for reflecting and magnifying the images to be projected toward a screen.

Abstract: A system and a method for time-multiplexed autostereoscopic display are disclosed, wherein the system includes a projector, an optical relaying device and a slit array. The projector can project a plurality of rays of different directions in different time sequences respectively. The optical relaying device is optically coupled with the projector for relaying the rays. The slit array is optically coupled with the optical relaying device for being illuminated by the rays. The slit array further has a plurality of regions which are illuminated by the rays respectively; and each of the regions has a plurality of slits which are turned on sequentially for a part of the rays to pass therethrough. Therefore, the display system can reduce the light loss of the rays each time when a 3D virtual image is formed.

Abstract: Eyeglasses including a lens unit including a pair of lenses and a frame, a supporting unit supporting the lens unit, a camera mounted on the frame, a projector mounted on the frame and configured to project content on a screen, and a processor configured to control the camera and the projector. A method of controlling eyeglasses, including generating a first projector image to be projected on a screen by a projector mounted on the eyeglasses, obtaining a camera image from a camera mounted on the eyeglasses, and generating a first user input signal by analyzing the camera image.

Abstract: A display apparatus (10) has at least one color channel providing a modulated light for each of a plurality of image frames (92). One or more laser sources that provide an illumination beam having a first polarization transmission axis. An imaging modulator (854, 85g, 85b) in the path of the illumination beam is actuable to direct the modulated light toward a projection lens. A laser blanking apparatus in the path of the modulated light is disposed to block transient light between image frames and has at least one analyzer (66) having a second polarization transmission axis that is orthogonal to the first polarization transmission axis and at least one light polarization modulator that is synchronously timed to rotate polarization of transient light during an interval between frames.

Abstract: An apparatus and method of processing three-dimensional (3D) images on a multi-layer display may generate virtual depth information based on original depth information, and display 3D images having various depth values using the generated virtual depth information. Also, the apparatus and method may appropriately provide color information to each of a plurality of display layers, thereby preventing an original image from being damaged.

Abstract: A stereoscopic digital projection system that projects stereoscopic images including first-eye images and second-eye images. The system includes one or more narrow-band, solid-state, tunable light emitters, each being controllable to alternately provide emitted light in a first state in a corresponding first spectral band and emitted light in a second state in a corresponding second spectral band. An image forming system including at least one spatial light modulator is used to form modulated images by modulating light from the tunable lights emitters. A controller synchronously controls the state of the tunable light emitters and the spatial light modulator pixels, wherein the spatial light modulator pixels are controlled responsive to first-eye image data when the tunable light emitters are in the first state and are controlled responsive to second-eye image data when the tunable light emitters are in the second state.

Abstract: A 2-dimensional (2D)/3-dimensional (3D) image display device generates 2D or 3D image data according to an input image signal and displays them on a display unit. The display unit includes a display panel for displaying an image in response to the 2D or 3D image data and an optical element layer operative during first and second driving modes in accordance with the 3D and 2D image data. A controller converts the optical element layer to be in the first driving mode in a first period before a 3D image signal is displayed when the input image signal changes from a 2D image signal to the 3D image signal, and converts the optical element layer to be in the second driving mode in a second period after the 2D image signal is displayed when the input image signal changes from the 3D image signal to the 2D image signal.

Abstract: A transparent display with a dynamic mask for generating three dimensional (3D) imagery. The display or apparatus includes a display element that is transmissive and that is selectively operable to display an image on the display element. The apparatus includes a dynamic mask element that is transmissive to light and that is positioned adjacent to the display element. The dynamic mask element is selectively operable to provide a mask with a shape and a size corresponding to the displayed image. The mask is positioned on the dynamic mask element so as to be adjacent to the first location, e.g., to be behind the displayed image, and, typically, the mask includes portions that are semi-transparent or opaque to block light from passing from the background through the displayed image and from passing through the display element at the location of the displayed image into the background to avoid double imaging.

Abstract: In exemplary implementations of this invention, light from a light field projector is transmitted through an angle-expanding screen to create a glasses-free, 3D display. The display can be horizontal-only parallax or full parallax. In the former case, a vertical diffuser may positioned in the optical stack. The angle-expanding screen may comprise two planar arrays of optical elements (e.g., lenslets or lenticules) separated from each other by the sum of their focal distances. Alternatively, a light field projector may project light rays through a focusing lens onto a diffuse, transmissive screen. In this alternative approach, the light field projector may comprise two spatial light modulators (SLMs). A focused image of the first SLM, and a slightly blurred image of the second SLM, are optically combined on the diffuser, creating a combined image that has a higher spatial resolution and a higher dynamic range than either of two SLMs.

Abstract: A viewing device for a stereo projection system, having a first and a second viewing window, each having an optically filtering filter layer system, wherein each viewing window has a filter spectrum in the visual spectral range having a plurality of pass bands that are separated from each other by blocking regions, and wherein each pass band of the filter spectrum of the first viewing window is covered by an associated blocking region of the filter spectrum of the second viewing window. Each filter layer system can be designed as an absorption filter layer system having a plurality of substances absorbing in differing spectral ranges, wherein at least one of the absorbing substances is a cyanine dye in the supramolecular configuration of a J-aggregate.

Abstract: Image projector can include a first optical system for producing a first image polarized into a first polarized light, a second optical system for producing a second image polarized into a second polarized light, a polarized light splitting device for reflecting one of the first polarized light and the second polarized light and transmitting the other one such that the first image and the second image travel on the same optical path, and a projecting lens for enlarging and projecting the first and second images from the polarized light splitting device.

Abstract: A projector that outputs a first image and a second image alternately image image, includes: a discharge lamp driving section that supplies, to a discharge lamp, a drive current that drives the discharge lamp; a state detecting section that detects a deteriorating state of the discharge lamp; and a control section that controls the discharge lamp driving section, wherein the control section controls the discharge lamp driving section so that the absolute value of the drive current becomes relatively small in the first period and relatively large in the second period and, in the second period, the control section controls the discharge lamp driving section so that the discharge lamp driving section supplies an alternating current to the discharge lamp as the drive current and controls the discharge lamp driving section so that at least part of the frequency of the drive current is decreased with the progress of the deteriorating state.

Abstract: Shaped glasses have curved surface lenses with spectrally complementary filters disposed thereon. The filters curved surface lenses are configured to compensate for wavelength shifts occurring due to viewing angles and other sources. Complementary images are projected for viewing through projection filters having passbands that pre-shift to compensate for subsequent wavelength shifts. At least one filter may have more than 3 primary passbands. For example, two filters include a first filter having passbands of low blue, high blue, low green, high green, and red, and a second filter having passbands of blue, green, and red. The additional passbands may be utilized to more closely match a color space and white point of a projector in which the filters are used. The shaped glasses and projection filters together may be utilized as a system for projecting and viewing 3D images.

Abstract: A method for producing a first output image and a second output image for being projected by a first projector and a second projector, respectively, is disclosed. The method comprises: providing a source image comprising a plurality of pixels, each pixel having a source value, providing an inverted threshold value for each pixel of the plurality of pixels, and generating thereof a temporary image comprising a temporary value for each pixel of the plurality of pixels. The method further comprises: generating the first output image comprising a first output value for each pixel of the plurality of pixels, the first output value being generated from the temporary value and the source value for each pixel, and generating the second output image comprising a second output value for each pixel of the plurality of pixels, the second output value being generated from the temporary value.

Abstract: A polarization conversion system (PCS) is located in the output light path of a projector. The PCS may include a polarizing beam splitter, a polarization rotating element, a reflecting element, and a polarization switch. Typically, a projector outputs randomly-polarized light. This light is input to the PCS, in which the PCS separates p-polarized light and s-polarized light at the polarizing beam splitter. P-polarized light is directed toward the polarization switch on a first path. The s-polarized light is passed on a second path through the polarization rotating element (e.g., a half-wave plate), thereby transforming it to p-polarized light. A reflecting element directs the transformed polarized light (now p-polarized) along the second path toward the polarization switch. The first and second light paths are ultimately directed toward a projection screen to collectively form a brighter screen image in cinematic applications utilizing polarized light for three-dimensional viewing.

Abstract: A projector is provided, including a first light source, a second light source, a splitting unit, a first modulating element, a second modulating element, a projection lens unit, a projection screen and a combining unit. The first light source provides a first beam in a first state. The second light source provides a second beam in a second state. The splitting unit receives the first beam and the second beam, splitting the first beam into a first sub-beam and a second sub-beam, and splitting the second beam into a third sub-beam and a fourth sub-beam. The first modulating element receives the first sub-beam and the third sub-beam from the splitting unit. The second modulating element receives the second sub-beam and the fourth sub-beam from the splitting unit. The combining unit respectively combines the first sub-beam and the second sub-beam, and combines the third sub-beam and the fourth sub-beam.

Abstract: An optical polarization state modulator assembly for use in a stereoscopic three-dimensional image projection system includes a spatial light modulator, a light source emitting multiple wavelength components of light for incidence on the spatial light modulator, and a projection lens. A polarization converter system cooperates with the spatial light modulator to produce in alternating sequence polarized light carrying first and second perspective view images of a scene in different ones of first and second subframes. A polarization modulator, in response to first and second drive signals, imparts to, respectively, the image-carrying polarized light a first output polarization state during the first subframe and to the image-carrying polarized light a second output polarization state during the second subframe. The image-carrying polarized light in the first and second output polarization states propagates through the projection lens for transmission to an observer.

Abstract: An electronic device having a 3-D image projection mechanism is provided. The electronic device comprises a display panel, a processing module, a projection screen and at least two micro projectors. The display panel is formed on a main body of the electronic device to display a 2-D display frame. The processing module determines whether a 3-D display request is received and generates a 3-D display command when the 3-D display request is received. The projection screen is formed according to the 3-D display command and is substantially vertical to the display panel, in which a light refractive rate of the projection screen is different from that of the air around the projection screen. The micro projectors are disposed in a circumference of the display panel and project image on the projection screen according to the 3-D display command such that a 3-D display frame is formed thereon.

Abstract: A projector that outputs a first picture and a second picture alternately, wherein a control section performs first control and second control, controls a discharge lamp driving section. In the first control and the second control, the absolute value of a drive current is relatively small in a first period and relatively large in a second period. In the first control, the energy provided to a first electrode in the second period is greater than the energy provided to the second electrode in the second period. In the second control, the energy provided to the second electrode in the second period is greater than the energy provided to the first electrode in the second period.

Abstract: A projector adapted to switch between a right-eye image and a left-eye image at predetermined timings to output the right-eye image and the left-eye image alternately, includes: a discharge lamp; a discharge lamp drive section adapted to supply the discharge lamp with a drive current for driving the discharge lamp; and a control section adapted to control the discharge lamp drive section, wherein a period between the switching timings temporally adjacent to each other starts with a first period and ends with a second period, and the control section performs a second period alternating-current control process for controlling the discharge lamp drive section so that an absolute value of the drive current becomes relatively small in the first period, and becomes relatively large in the second period, and an alternating current is supplied to the discharge lamp as the drive current in the second period.