Abstract: A video projector employs an acousto-optic deflector for moving a horizontal line of pixels vertically to form an image on a remote screen. Because the pixel images are formed from parallel beams, rather than by reimaging a line of pixel images on a vertical deflector, the image formed is in focus at all screen distances. The horizontal line of pixels is formed from a single laser beam which is expanded laterally and passes through individual intensity modulators before being aimed at the vertical deflector. The horizontal line of beams may be divided into zones, one above the other, and later reorganized into a single line at the vertical deflector, in order to reduce the size of the projector.

Abstract: A color liquid crystal display apparatus comprises an ECB (Electrically Controlled Birifringence) type liquid crystal display device, which has a plurality of dots arranged in a matrix form and displays a plurality of colors in accordance with applied voltages dot by dot, and a driving circuit. The driving circuit includes an image memory, a display controller, a conversion table, a D/A converter and drivers. The display controller reads image data stored in the image memory. This image data defines a display color of a pixel consisting of a plurality of dots and a gradation. The conversion table converts image data to voltage data defining voltages to be applied to a plurality of dots of the liquid crystal display device in order to display the color and gradation defined by the image data. The D/A converter converts this voltage data to an analog voltage and the drivers apply this analog voltage to each dot of the liquid crystal display device.

Abstract: An optical system is described consisting of reflection birefringent light valves, polarizing beam splitter, color image combining prisms, illumination system, projection lens, filters for color and contrast control, and screen placed in a configuration offering advantages for a high resolution color display. In particular, the present invention includes a color splitting prism assembly having a plurality of output faces through which a separate color component is directed to be reflected by a respective light valve. Color absorbing filters are disposed at each of the output faces to absorb the color components not corresponding to the color directed through each output face.

Abstract: An optical system is described consisting of reflection birefringent light valves, polarizing beam splitter, color image combining prisms, illumination system, projection lens, filters for color and contrast control, and screen placed in a configuration offering advantages for a high resolution color display. The illumination system includes a light tunnel having a cross-sectional shape corresponding to the geometrical shape of the spacial light modulator to optimize the amount of light projected onto the screen.

Abstract: The projection apparatus of the present invention includes a light source; a three-color separation means such as a cross dichroic prism or a cross dichroic mirror; three first polarization beam splitters; three spatial light modulators; three write image formation devices; and a projection optical system. The three-color separation means and the three first polarization beam splitters all lie in a single plane, and the three first polarization beam splitters are so arranged that a reflected light beam is emitted from each of the three first polarization beam splitters in the same direction.

Abstract: The present invention relates to an image display device comprising a plurality of image display means for displaying a plurality of bits of time-serial image information from image producing means, shutter means corresponding to the plurality of image display means and transmitting or not transmitting a light beam therethrough, an imaging optical system for imaging the plurality of bits of time-serial image information on the same area on a common imaging plane, and control means for repeating to bring about a state in which only one of the plurality of shutter means transmits a light beam therethrough for a predetermined time with a predetermined time difference to thereby image the plurality of bits of image information successively on the imaging plane.

Abstract: An image processing apparatus which enables error diffusion in interlaced-scanning image data. An input unit inputs image data formed by interlaced-scanning, and an adder adds error data to the input data. A binarization circuit performs level-conversion on this data. An error calculator obtains a quantization error as error data to be diffused to other pixels. The error data is stored in first and second lines in a line buffer. When processing for one scanning line is finished, error data for the next scanning line is read out of a frame buffer and stored into the first line in the line buffer, and the error data stored in the second line in the line buffer is stored at a corresponding position in the frame buffer, then the second line is cleared.

Abstract: In a projector comprising three image forming devices, disposed between a separation optical section and a combination optical section, for processing a red, a green, and a blue light beams, at least one of the three image forming devices comprises a polarization direction converting means, such as a halfwave plate for converting polarization direction for one of the red, the green, and the blue image light beams so that one of a color combining dichroic mirrors has a cutoff wavelength of spectral characteristic which shifts toward outside for one of the red, the green, and the blue central wavelengths from that of one of a color separating dichroic mirrors. The halfwave plate may be disposed in a light-leaving side of at least one of the three image forming devices.

Abstract: In a color image display apparatus, light beams intensity modulated by a green color image signal are deflected by an ocillating mirror, and then focused on a photo-conductive layer (PCL) member of a light-written type spacial light modulation element (SLM) through two focusing lenses for light write operation. Light beams intensity modulated by a time-axis compressed time-divisional image signal of two remaining colors (red and blue) are deflected by another mirror oscillated simultaneously with the ocillating mirror, and then focused on a PCL member of a SLM of the same type through two focusing lenses for light write operation. A read light beam is resolved into the light of the green wave length band and the lights of red and blue wave length bands, respectively, and then given to the SLMs, respectively for light read operation. The two read light beams reflected by the SLMs are synthesizing, and then projected on a screen through a common projection lens.

Abstract: An electro-optical device includes a light amplifying portion comprising a first substrate having a transparent conductive film, a photoconductor whose electric resistance is lowered in accordance with light irradiation and a dielectric thin film, a second substrate having a transparent conductive film and uniaxially-orienting layer and a ferroelectric liquid crystal or antiferroelectric liquid crystal layer sandwiched between the first and second substrate, an image write-in portion comprising a display body, a mirror for splitting an image light into three color lights and light shutters for performing a switching operation between transmission and interception of the split lights, and serves to irradiate the image light through the first substrate of each light amplifying portion, an image read-out portion comprising a light source for irradiating light through the second substrate of each of the three light amplifying portions, and red, green and blue color filter portions, and an imaging portion for synt

Abstract: Disclosed is a picture information memory device, including a picture information memory means for generating electric charges corresponding to the intensity of write-in light incident thereon, and for holding the generated electric charges as polarized charges, an exposing means for exposing the picture information memory means to light from an object, and an alternating-current bias voltage applying means for applying an alternating-current bias voltage having a desired frequency to the picture information memory means, whereby electric charges generated by the portion of the object light the intensity of which varies at the same frequency as that of the alternating-current bias voltage, are selectively accumulated from the entirety of electric charges generated by the object light incident on the picture information memory means, and held as the polarized charges in the picture information memory means.

Abstract: A projection TV light controller is comprised of a plurality of blocks of material which are transparent to the light of a lamp, adjacent sides of the blocks being cooperatively shaped and being disposed adjacent to each other, to form a single light controlling element. The element is shaped to surround a cylindrical region coaxial with a central axis of the element for containing the lamp. Light is conducted from the lamp in each of the three primary colours into respective ones of the blocks. Apparatus is associated with each block for creating video display light signals relating to a corresponding primary colour. The video display light signals of all of the primary colours are combined into a single light beam which is conducted out of the light controlling element. With the lamp being contained in a central region, it can be cooled either by convection, by a fan, or by a fused quartz fluid jacket around the lamp, maintaining the block cool and minimally subject to expansion or contraction.

Abstract: This specification discloses an image projector for projecting a tri-color composite optical image on a screen as a magnified optical image. A reading light beam emitted from a light source is separated into three color beams, e.g., Red, Green and Blue color beams through a tri-color separation and composition optical system. The separated color beams are irradiated on image forming devices provided correspondingly with Red, Green and Blue color images to read out color images respectively therefrom. Each of the reflected light beams from the image forming device carrying color image information impinges again on the tri-color separation and composition optical system to compose a composite image beam. The composite image beam is projected on the screen through an optical lens system comprising a first lens group, a second lens group and a third lens group disposed along an optical axis in order.

Abstract: A front projection video display system achieves high contrast without darkened ambient room conditions by a specific combination and arrangement of the components of this system. These components include a front-projection video projector which projects an image of particular direction of polarization; polarizing lenses which polarize light radiated from room light fixtures in a direction orthogonal to that of the projected image; a polarizing filter which substantially transmits light polarized parallel to the projected image and substantially blocks light orthogonal to the projected image; and a projection screen which is polarization maintaining and which receives the projected image for viewing by the viewing audience.