Abstract: There is provided an optical communication apparatus having high communication stability. An optical communication apparatus of the present invention includes: a signal-transmitting portion; and a signal-receiving portion. The signal-transmitting portion includes a light-emitting element, and a first polarizing plate, which light output from the light-emitting element enters, and which is configured to output polarized light. The signal-receiving portion includes a second polarizing plate, which the light from the signal-transmitting portion enters, and a light-receiving element configured to receive light passing through the second polarizing plate. The first polarizing plate includes a first reflective polarizer.

Abstract: Methods and systems are provided to assemble an optical waveguide assembly. An optical waveguide assembly may be used in a virtual reality headset or other type of projection system. The optical waveguide assembly includes a front lens, one or more optical waveguides, and a back lens. In one embodiment, an insert is used that is the same width as the optical waveguides to prevent cracking of the optical waveguides. In another embodiment, the optical waveguide assembly includes Optically Clear Adhesive (OCA) tape between the different elements of the optical waveguide assembly to precisely align the optical waveguides. In another embodiment, the optical waveguide assembly has cover portions or a frame that protect the optical waveguides in the optical waveguide assembly.

Abstract: According to one embodiment, the power consumption can be reduced as a whole without a large decrease in the efficiency of transmittance. According to one embodiment, a display device includes subpixels arranged in a first direction and a second direction Y intersecting the first direction, color filters corresponding to the subpixels, respectively, and a light device. The color filters include at least blue filters and yellow filters adjacent to each other. A frame period of the light device includes at least a period of outputting cyan light and a period of outputting magenta light.

Abstract: A head mounted or helmet mounted display (HMD), head up display (HUD, or collimated virtual window can be used in various applications including but not limited to avionic applications. The HMD, HUD, or collimated virtual window can include a cylindrical, elliptical, or curved substrate waveguide combiner. The cylindrical or curved substrate waveguide combiner can be used with a projector which provides pre-aberrated light. The cylindrical substrate waveguide combiner provides collimated light to a user with reduced wavefront errors.

Abstract: An image processing method and image processing device for performing the same are disclosed. In one aspect, the image processing method includes transmitting a content image having a visual condition to a display unit. The method also includes periodically changing the visual condition from a first visual condition to a second visual condition according to a modulation timing such that the content image to be displayed after the modulation timing has the second visual condition different from the first visual condition before commencement of the modulation timing.

Abstract: Dual modulator displays are disclosed incorporating a phosphorescent plate interposed in the optical path between a light source modulation layer and a display modulation layer. Spatially modulated light output from the light source modulation layer impinges on the phosphorescent plate and excites corresponding regions of the phosphorescent plate which in turn emit light having different spectral characteristics than the light output from the light source modulation layer. Light emitted from the phosphorescent plate is received and further modulated by the display modulation layer to provide the ultimate display output.

Abstract: The liquid crystal panel displays a video in a display area by modulating light from the backlight including a plurality of light sources. The luminance value calculator calculates light source luminance values of the light sources based on an input video signal including signal values of pixels. The luminance distribution calculator calculates luminance distribution of light in illumination areas obtained by tentatively dividing the display area if the light sources emit light according to the light source luminance values. The representative value calculator calculates, based on the input video signal, a representative luminance value in each of divided areas obtained by dividing the display area. The signal corrector corrects the input video signal based on the luminance distribution according to a difference between a maximum value of the representative luminance values and an average value of the representative luminance values.

Abstract: A cooling device for use in an electronic apparatus is capable of achieving a sufficient cooling capability with an effective replacement method in a narrow flow path. The cooling device for the electronic apparatus, which includes a plurality of members juxtaposed such that surfaces thereof confront each other, at least one of the members including a heat radiating surface, includes a first air-cooling member which includes a first outlet port that creates a first air stream, and a second air-cooling member which includes a second outlet port that creates a second air stream to flow in a direction different from the first air stream. The first and second outlet ports have different opening widths, respectively.

Abstract: A projector includes: a lighting device that emits light of a plurality of different colors; a plurality of liquid crystal light valves that modulate the light of a plurality of colors; a color synthesizing optical system that synthesizes the color light modulated by the plurality of liquid crystal light valves; and a projection optical system that projects the light synthesized by the color synthesizing optical system to a projection target face. A cell thickness of one liquid crystal light valve modulating light of one color of the plurality of liquid crystal light valves is smaller than a cell thickness of the other liquid crystal light valves modulating the light of other colors, and an alignment state of liquid crystal at the time of applying the maximum gradation voltage is substantially the same in one liquid crystal light value and the other liquid crystal light valve.

Abstract: A liquid crystal display device displays an image by stacking a plurality of liquid crystal panels, and by controlling a light transmittance with voltage application to liquid crystal of each panel, wherein during execution of voltage application to the liquid crystal of one of the panels, a voltage to the liquid crystal of the other panel serves as a non-display voltage. No image is displayed simultaneously on the two or more stacked liquid crystal panels. In the liquid crystal panel to which no voltage is applied and on which no image is displayed, the longitudinal axial direction of liquid crystal molecules coincides with the polarizing axial direction of polarizers, or is orthogonal to the polarizing axial direction; therefore, no influence is exerted on the overall double refraction, and the overall voltage-transmitted light intensity characteristic corresponds to the sum of the voltage-transmitted light intensity characteristics of the respective panels.

Abstract: A projection stereoscopic display includes: a stereoscopic display optical system receiving linearly polarized light from the light source and displaying a first picture and a second picture both having binocular parallax by linearly polarized light with polarization directions orthogonal to each other, in which the stereoscopic display optical system includes: a reflective liquid crystal panel modulating and reflecting linearly polarized light from the light source in response to a picture signal, a first polarizing device splitting the first picture from reflected light from the reflective liquid crystal panel, a retardation device converting the polarization direction of the first picture into a direction orthogonal thereto, and a second polarizing device splitting the second picture from reflected light from the reflective liquid crystal panel, and superimposing the second picture on the first picture of which the polarization direction is converted by the retardation device.

Abstract: A diffractive head up display device that includes a projection unit that uses a display to project an image through a projection window of an image mask, and towards a diffractive combiner. The display and the mask are moveable at right angles to the axis of the projection light beam, so that the adjustment of the position of the virtual image in the field of view of the observer, for example the driver of a vehicle, is obtained by translation of the display and of the mask.

Abstract: A projector system includes a light source module, a light guiding plate, a polarizing beam splitter (PBS) module and a projection lens module. The light source unit includes a red-color light source, a green-color light source and a blue-color light source respectively for emitting red, green and blue light. The light guiding plate optically combines light emitted from the red-color light source, the green-color light source and the blue-color light source. The PBS module is positioned opposite to the light output surface of the light guiding plate and is configured for splitting the combined light into s-polarization light and p-polarization light, reflecting the s-polarization light and converting the reflected s-polarization light into p-polarization light, modulating and outputting the converted p-polarization light using a display information signal. The projection lens module projects light with information onto a screen.

Abstract: An electronic display device includes a display unit adapted to display an image, and a barrier unit overlapping the display unit, the barrier unit including a liquid crystal layer between first and second substrates, the first and second substrates facing each other, a common electrode between the liquid crystal layer and the first substrate, a transparent insulation layer between the liquid crystal layer and the second substrate, the transparent insulation layer having an inner surface facing the liquid crystal layer and an outer surface facing the second substrate, a plurality of first electrodes along a first direction between the outer surface of the transparent insulation layer and the second substrate, the first electrodes being spaced apart from each other along a second direction, and a plurality of second electrodes along the first direction between the inner surface of the transparent insulation layer and the first substrate.

Abstract: Disclosed are display systems using reflective liquid-crystal microdisplays that efficiently use unpolarized light sources without needing to double the étendue of the source as occurs with conventional polarization conversion systems. Furthermore, the display systems can utilize on-axis projection lenses, and fast-switching ferroelectric-liquid-crystal-on-silicon (FLCOS) microdisplays. The systems utilize beam splitters that split unpolarized incident light into two diverged beams of opposite polarization. Ferroelectric liquid crystal display elements are combined with fixed retarders to enable an element that can selectively flip or not flip the handedness of incident circularly polarized light.

Abstract: A portable material exhibiting apparatus comprises a base assembly having a pivoting base, the pivoting base being disposed on one side of the base assembly; a retractable rod assembly having one end pivoting to the pivoting base; and an image capturing module having one end pivoting to the other end of the retractable rod assembly. Therefore, when carrying the portable material exhibiting apparatus, the image capturing module may rotate to be parallel with the retractable rod assembly. The retractable rod assembly may shorten its length and rotate to be parallel with the base assembly. Via this arrangement, the spaced occupied by the portable material exhibiting apparatus is reduced greatly.

Abstract: A liquid crystal projection apparatus having an image synthesizing unit including a color synthesization prism having an upper surface, a lower surface facing the upper surface, and three light incident faces between the upper and lower surfaces; an upper prism pedestal provided on the upper surface of the color synthesization prism; a lower prism pedestal provided on the lower surface of the color synthesization prism; an upper liquid crystal panel holder provided on the upper prism pedestal and having first jointing sections, a lower liquid crystal panel holder provided on the lower prism pedestal and having second jointing sections; three liquid crystal panels; and three liquid crystal panel mounting members securely fixing thereon the three liquid crystal panels, the three mounting members arranged on the respective three incident faces of the color synthesization prism joining the first jointing sections located in association with the respective incident faces to corresponding second jointing sections l

Abstract: The invention pertains to an improved LCOS microdevice that eliminates colored lights required generally in a prior art system. According to one aspect of the present invention, the LCOS structure uses color filters directly in the LCOS chip. Depending on the number of colors being used, the color filters are arranged repeatedly according to a predefined pattern across an entire LCOS chip to coincide with pixels in the microdevice. When a white light is focused onto the LCOS microdevice, it reflects a color image that is then magnified and projected onto a display screen.

Abstract: An image display apparatus includes a polarization conversion element which converts second color light of unpolarized light emitted from a light source into a first linear polarized light, and a light path separation element which separates the second color light emitted from the first and third color light; and performs image display by illuminating a first, a second and a third liquid crystal display elements with the first, second and third color light that pass through the light path separation element, wherein the light path separation element leads a first linear polarized light component of the second color light to the second liquid crystal display element, and wherein the light path separation element leads a second linear polarized light component whose direction of polarization is orthogonal to the first linear polarized light component of the second color light, in a direction different from any of the liquid crystal display elements.

Abstract: An illumination system for providing an illumination beam to a light valve is provided. The illumination system includes a light source, a light integration rod, a color wheel, a first focusing unit and a second focusing unit. The light source is capable of generating the illumination beam, and the light integration rod is disposed on the transmission path of the illumination beam. The first focusing unit is disposed between the integration rod and the color wheel and is capable of focusing the illumination beam onto the color wheel. The second focusing unit is disposed between the color wheel and the light valve and is capable of focusing the illumination beam onto the light valve.

Abstract: A projection display apparatus 101 in which the light quantity adjusting means has a simple and readily interchangeable structure, and which can improve image quality by adjusting the quantity of light received by a light valve continuously, without causing illuminance irregularities, and without having unwanted light radiated onto the screen, the light quantity adjusting means 9 having light blocking members 91L, 91R for blocking light in transit to a second lens array 22, and rotational axes 91LA, 91RA for turnably supporting each of the light blocking members on an xy plane, the light blocking members 91L, 91R and rotational axes 91LA, 91RA being positioned so that the rotational axes 91LA, 91RA are disposed in positions symmetric with respect to the optical axis AX on the xy plane, and the turning range from the light blocking initiation position at which the light blocking members 91L, 91R, by being turned, start to block light in transit toward the second lens array 22 to the maximum light blocking posi

Abstract: A projection image display device including a display plane for displaying an image, a projection mechanism projecting an image on the display plane, and an imaging mechanism arranged on the same side of the display plane as the projection mechanism for imaging the display plane. The imaging mechanism is arranged at a position where a position symmetric with respect to the display plane of the projection mechanism is out of the range of the field angle of the imaging mechanism. By arranging the imaging mechanism at a position where no direct reflecting light of the light source of the projection mechanism comes, it is possible to prevent generation of a hot spot.

Abstract: The invention enables efficient cooling of: a light source providing source light; an optical system adapted to split the source light received from the light source into three primary colors R, G, and B; and a power supply unit for supplying electric power to various electric components installed in a casing of a projector apparatus. To do so, a first fan is arranged between the light source and the power supply unit such that its air inspiration face is directed to the power supply unit and its air expiration face is directed to the light source. Further, a second fan, adapted to inspire air from within the projector apparatus, is provided in the central area of the projector apparatus. On the air expiration side of the second fan is a cooling duct for cooling the light source and optical system.

Abstract: A visual presenter includes a base, an upright portion standing from the base and having a distal end, a support column including a horizontal portion formed by bending the distal end of the upright portion so that the horizontal portion protrudes forward away from the base, the horizontal portion having a distal end, an imaging camera head mounted on the distal end of the horizontal portion, and a pivot portion provided on the upright portion of the support column so that the horizontal portion is pivotable horizontally.

Abstract: A projection system includes a projector that emits imaging light, a polarization screen that selectively reflects, of the imaging light, only light in a specified state of polarization, and a reflecting element placed on an optical path between the projector and the polarization screen to reflect the imaging light. The projector emits imaging light containing circularly polarized light whose state of polarization varies according to the wave range of the light, and the first and the second reflective layers in the reflecting element have polarization characteristics and reflection wave ranges corresponding to the state of polarization and the wave range of the circularly polarized light contained in the imaging light in such a manner that the state of polarization of the circularly polarized light, after being reflected from the first and the second reflective layers, is uniform irrespective of the wave range of the light.

Abstract: A liquid crystal projector device of the present invention includes a lamp unit, an optical system for separating light emitted from the lamp unit into light of three primary colors, and an image synthesizer for generating image light of three primary colors from the light of three primary colors, and synthesizing the generated image light of three primary colors into color image light. The image synthesizer includes three liquid crystal panels for three primary colors and three incidence polarizing plates arranged at light incidence sides of the liquid crystal panels. Each of the incidence polarizing plates includes a glass base material and a polarizing film joined to a surface thereof. The surface area ratio of the glass base material to the polarizing film is set to 178%.

Abstract: An optical scanner suitable for scanning a vertical object. The optical scanner has a scanning body, a focusing device and a scanning module. The scanning body has a transparent window, the focusing device has an arm, a reflective mirror and a lens. One end of the arm is coupled to the scanning body, and the reflecting mirror and the lens are disposed on the arm. The scanning module is disposed in the scanning body with a shell, a lens and an optical sensor. The shell has a light cone opening, and the lens and optical sensor are disposed within the shell. The image of the vertical object is focused by the focusing device on the transparent window, incident to the scanning module via the light cone opening, and refracted by the lens to form an image on the optical sensor.

Abstract: A display apparatus for displaying video information by superimposing a plurality of images obtained through a plurality of display systems, each being constituted by a light source, a reflection type liquid crystal panel and an optical system, characterized in that the apparatus comprises at least either of system selection means for selecting at least one of the plurality of display systems and modifying means for modifying the attributes of the image obtained through one of the display systems.

Abstract: An elevator installation includes an elevator car moved in an elevator shaft between floors in a building. A shaft door for closing the elevator shaft is arranged at each floor. A method for representing information on the shaft doors makes possible a qualitatively high-grade projection of an image on the shaft door. The shaft doors are formed to be at least partly transparent, wherein a projector is arranged in the elevator shaft and projects an image onto the side of the shaft door facing the elevator shaft.

Abstract: In the liquid crystal display device having a back-light source for illumination, image data is provided to the panel in successive frames such that the optical response of the liquid crystal in each pixel within a frame period has an impulse-like shape. The back-light source is controlled to illuminate the liquid crystal display panel such that the illumination is provided to the pixels for only part of the frame period. The optical response curve has a rising portion followed by a falling portion, and the back-light source is controlled by a timing control module such that the back-light is turned off at least when the optical response curve is in the falling portion. It is also possible to remove the image data from the pixels, or to control the charging and discharging of the electrodes to produce the impulse-like shape.

Abstract: An image projection apparatus includes a light modulation system, a projection optical system for projecting a two-dimensional image onto a surface to be projected with light from the light modulation system, and an image signal processing unit for supplying an image signal to the light modulation system. A power supplying portion supplies power to the light modulation system, a head portion contains the projection optical system, and a main body portion contains the power supplying portion. In addition, a drive connection portion connects the head portion with the main body portion, in which the head portion and the main body portion can be relatively driven.

Abstract: A lighting apparatus used for a projection type display is provided, which can change the incident ray volume to an optical modulation device without changing the optical output intensity of the lamp, and can exhibit excellent effects in expressive power of an image and adaptability to the use environment. The lighting apparatus of the present invention comprises; a light source, two fly-eye lenses constituting a uniform lighting device, and a shading plate arranged between these fly-eye lenses and constituting a dimming device for adjusting the amount of light of the outgoing light from the light source. The angle of inclination of the shading plate is controlled based on an image signal supplied to the optical modulation device, thereby enabling adjustment of the amount of light.

Abstract: A convection cooled liquid crystal display panel projector having a low wattage light source. The projector consist of a housing with a plurality of louvered vents preventing light from escaping from the housing while allowing air to circulate there through. A primary lens configuration having a light source, and a liquid crystal display panel, a Fresnel lens and a projector mirror. An overhead lens configuration by said light source and a Fresnel lens and liquid crystal display panel with a mirror in spaced relation thereto.

Abstract: A projection method using a real object projector is disclosed. The real object projector comprises a base, a control circuit installed in the base, and an image receiving apparatus installed on the base. The base is combined with a light source module, and between the light source module and the base is a different movable connection relationships according to different designs. The light source module can have a transparent film clip with an identifying mark, and different transparent film clips have different marks. When projecting with the real object projector the steps are, firstly moving the image receiving apparatus to a suitable position according to the mark on the transparent film clip, then focusing the image receiving apparatus according to the transparent film clip, and finally pressing an image receiving key to automatically identify the kind of transparent film clip and magnify the projection image with the control circuit.

Abstract: The invention provides a light shielding film having excellent capability of shielding light. The light shielding film includes a barrier layer formed of a material selected from the group including a refractory nitride compound, silicon compound, tungsten compound, tungsten, and silicon, and also includes a metal layer formed of a material selected from the group including a metal in the form of a simple substance or a metal compound, whose high capability of shielding light is degraded when being oxidized.

Abstract: In a camera-assisted presentation system, a microcomputer activates a motion detecting module to detect a motion of an object, based on a variation in luminance of image data representing a material photographed by a photographing module. In the case of detection of a motion of the object, the microcomputer controls an output control module to prohibit transfer of the image data to an image output module. Image data photographed immediately before detection of the motion is kept in an output image storage sub-module of the image output module. This arrangement effectively prevents any action of setting the material from being undesirably displayed on an external display unit, thus ensuring smooth presentation with improved display of images during the actions of setting the material in the camera-assisted presentation system.

Abstract: A relay optical system, which focuses light from a light outgoing plane of an integrator rod into an image on a predetermined illumination area, has a first optical element for correcting at least a distortion aberration, and a second optical element for correcting at least a chromatic aberration. The first optical element includes at least one focusing lens having a non-spherical convex plane, and the second optical element includes at least one diverging lens having a spherical concave lens. The diverging lens is composed of a relatively high dispersive optical glass material having an Abbe's number of not greater than 40. The focusing lens is composed of either an acrylic resin material or an olefin resin material. This arrangement focuses light into an image as an illumination area with a high accuracy and thereby enhances the quality of a resulting displayed image in a projector based on SCR technique.

Abstract: A reflecting optical element is disclosed which includes the following articles. The reflecting optical element is constituted by: a base member having a continuous curved-surface portion, and a resin layer integrally formed of resin on the curved surface of the base member, and having a plurality of mutually discontinuous curved surfaces to be reflecting surfaces. The base member is made of a material smaller in coefficient of linear expansion than the resin for forming the resin layer. Thus, a reflecting optical element is provided which is low in optical-performance deterioration caused by the temperature effect, and small in the number of restraints in fabrication.

Abstract: A display device for selectively displaying any one of 2D and 3D images with a capacity of displaying the 3D image with the same resolution as that of the 2D image. The display device includes a light source radiating white colored light, and an image display unit receiving the light from the light source to display the desired images. A beam splitter is placed between the light source and the image display unit to split the light radiated from the light source in the directions of left and right eyes of the user, and feed the split light rays to the image display unit. An optical shutter is provided at any one of front and rear surfaces of the beam splitter. The optical shutter has a plurality of shutter members with variable light transmittance to control the light transmission such that at least one of the two-directional light rays split at the beam splitter reaches the user.

Abstract: A flat-panel projection display comprises a slab waveguide having a preferably embossed diffraction grating on one face, a lens for directing light into an edge of the waveguide, and in the focal plane of the lens a liquid-crystal modulator for modulating the intensity of the light as a function of lateral position and elevational direction of travel. The light is ejected from the slab waveguide by the grating at angles corresponding to the input angles, giving a virtual display. The light from the modulator can be expanded in one dimension by passing through a magnifying waveguide, followed by scattering in the plane by a screen and projection by a lens at the other end of the waveguide. Head-up and 3-D displays can be constructed using this principle.

Abstract: An image display apparatus which includes at least one light source to generate and radiate a light beam, a color separating unit to separate the light beam emitted from the light source into a plurality of color light beams and make at least one of the separated color light beams and the other color light have different polarizations. Further, a plurality of light valves are used to form an image by controlling at least one of the color light beams separated by the color separating unit and emitted therefrom, in the unit of pixel according to input image signals. Additionally, an image combiner is used to combine images generated by the light valves.

Abstract: A real object projector having a base, a control circuit installed in the base, and an image receiving apparatus installed on the base. The base is combined with a light source module, and between the light source module and the base are different movable connection relationships according to different designs. The light source module can have a transparent film clip with an identifying mark, and different transparent film clips have different marks. When projecting with the real object projector the steps are, firstly moving the image receiving apparatus to a suitable position according to the mark on the transparent film clip, then focusing the image receiving apparatus according to the transparent film clip, and finally pressing an image receiving key to automatically identify the kind of transparent film clip and magnify the projection image with the control circuit.

Abstract: A rear projection display device includes an image generator, a reflector, a screen and a light shield disposed between the reflector and the screen. The image engine emits image beams among which ineffective ones are blocked by the light shield while effective ones are reflected on the screen via the reflector, thereby increasing the image forming performance of the displace device. The light shield is mounted on an adjusting device having an adjusting element. After the rear projection display device has been assembled, an angle and position of the light shield can be adjusted by means of rotating the adjusting element to further help the light shield to block the ineffective beams.

Abstract: An image projecting system for mounting in a hidden location such as a ceiling or a piece of furniture such as a desk. The system includes an image producing apparatus and a plurality of optical components. At least one of the optical components is a mirror that can move between two positions. In the first position the mirror is flush with the ceiling or the desk so that the system is hidden from view. In the second position the mirror is at an angle to the ceiling or the desk so as to project an image externally of the hidden location and onto a screen or other surface.

Abstract: The invention provides a cased electro-optical apparatus that can include an electro-optical unit that receives light in the image display area from a light source, a plate that opposes one side of the electro-optical unit, and a cover for covering the electro-optical unit. The cased electro-optical apparatus can have a case for containing the electro-optical unit by supporting at least a portion of the periphery of the image display area of the electro-optical unit by the plate and/or the cover. One of the plate and the cover is selected from a plurality of ones having different shapes and each of the plurality of ones is attachable to the other.

Abstract: A flat mirror for folding an optical path in a casing of a rear projection television is arranged in the casing on not the side of a screen but a rear or upper side of the casing. In order to direct an optical path of an image projection to a flat mirror on a rear or upper side of the casing, a plurality of focusing mirrors, with which a light beam can be directed at a large angle with respect to a normal line of the screen and can focus an image through a shorter distance compared with a conventional lens system, are used. Since the light beam projected by the focusing mirrors is directed at high angle and reflected by the rear or upper side flat mirror in the casing, the light beam is focused on the screen provided on a front side of the casing.

Abstract: In a liquid crystal projection display, first, second and third color components of an input light beam are processed by first, second and third polarizers that are disposed respectively perpendicular to propagation directions of the first, second and third color components. First, second and third liquid crystal modulators modulate the first, second and third color components from the polarizers. First, second and third analyzers process the modulated first, second and third color components, respectively, and are disposed perpendicular to the propagation directions of the first, second and third color components. The first, second and third liquid crystal modulators are disposed respectively at an angle relative to a recombiner unit such that an output light beam can be provided by the recombiner unit to a projection lens group with a propagation direction that is parallel to an optical axis of the projection lens group.

Abstract: An overhead projector is provided which eliminates disturbing light on a projection screen (12) from parts of a picture plate (2) of the projector which surround a projected document (10) as well as light on the screen (12) which arises when documents are being changed on the picture plate (2). The picture plate (2) is covered with a first polarizing layer (3) which is a supporting surface for the document, by placing a second polarizing layer (9) in the path of the light close to a projector head (6, 7) and by arranging the polarization directions of the first and second polarizing layers (3, 9) perpendicular to each other so that light which first passes the first polarizing layer (3) where no document is placed and thereafter passes the second polarizing layer (9) is absorbed.

Abstract: An electronic screen display includes a screen, a memory storing digital content for display on the screen, a processor communicatively coupled to the memory and the screen, and a sensor communicatively coupled to the processor. The processor obtains digital content from the memory and generates signals causing a primary display to appear on the screen. The sensor is activated by sensing a light signal emitted from an external device being used to read information from the primary display, and causes the processor to obtain further digital content from the memory and generate signals causing a secondary display to appear on the screen. A corresponding display method includes displaying primary digital content on a screen, sensing a light signal emitted from an external device being used to read information from the screen, and in response to the sensing the light signal, causing secondary digital content to appear on the screen.

Abstract: Images with enhanced resolution are created with a display device comprising a non-transmissive light valve including addressable pixels, a light source that directs light to the light valve, and a lens positioned between the light valve and the light source, the lens directing light from the light source to the pixels on the light valve and the light valve directing light to viewing optics. The light valve is an integrated circuit ferroelectric liquid crystal device (ICFLCD), or other light valve arrays such as a digital light processor (DLP) display, having an array of addressable pixels. Such light valves may be mounted in a head mounted display.