Abstract: A projection system including a first imager that is an organic light emitting diode (OLED) imager configured to modulate a light band on a pixel-by-pixel basis proportional to gray scale values provided for each pixel of the image to provide a first output matrix and a second imager positioned and configured to receive the first output matrix of modulated pixels of light from the first imager on a pixel-by-pixel basis proportional to a second gray scale value provided for each pixel of the image is disclosed.

Abstract: An apparatus for adding red light to a polarized light system includes a first light source and a second light source. A polarizing beam splitter combines S-polarized-light from the first light source and P-polarized light from the second light source. A first multi-layer filter means rotates the polarization state of the green light from the first light source to the P-polarization state. A second multi-layer filter means rotates the first light source red light to the P-polarization state and rotates the second light source red light to the S-polarization state. Finally, a reflective cleanup polarizer reflects the P-polarized-light back to the respective first and second light source and passes the S-polarized-light.

Abstract: A light projection system projects an image comprising a matrix of light pixels having modulated luminance. The projection system includes a first imager configured to modulate a light band on a pixel-by-pixel basis proportional to gray scale values provided for each pixel of the image to provide a first output matrix. A second imager is positioned and configured to receive the first output matrix of modulated pixels of light and modulate the individual modulated pixels of light from said first imager on a pixel-by-pixel basis proportional to a second gray scale value provided for each pixel of the image.

Abstract: The invention relates to a light valve system that enhances the contrast ratio for light and dark video images and reduces contouring artifacts. The light valve system comprises a color selection device configured to temporally attenuate component color bands of light to correspond with a video input signal. A first polarizing beam splitter configured to polarize the component color bands into oppositely polarized components, and a microdisplay configured to receive at least one of the oppositely polarized components for forming a projected light matrix.

Abstract: A projection system is provided, comprising three discrete monochromatic light sources for sequentially providing monochromatic beams of blue, green and red light to a single imager, which modulates the light on a pixel-by-pixel basis to form a matrix of modulated light pixels. Each of the monochromatic light sources has a switching rate consistent with a refresh rate of the projection system for generating sequential, discrete monochromatic beams of light. The monochromatic matrices of modulated light are combined to form a full color viewable image.

Abstract: A lens system for use in a two-stage projection system that relays light output from a first imager on a pixel-by-pixel basis onto a second imager (e.g. an LCOS). The lens system includes a double gauss lens set having a distortion of less than about 0.015% with at least about 90% of the light energy of a specific pixel projected within about a 15.4 micrometer square. Thus a projection system that enhances the contrast ratio for video images, particularly in the dark state, and reduces contouring artifacts, can be achieved.

Abstract: The disclosed embodiments relate to a system and method for projecting video onto a screen. A video unit (10) comprising a first component (30) configured to create a first beam of light with a first polarity, a second component (40) configured to create a second beam of light with a second polarity subsequent to the creation of the first beam of light, and a third component (42) configured to allow the first beam of light pass through it without a change of polarity and to change the polarity of the second beam of light to the first polarity.

Abstract: A liquid crystal display projection system for pictures that can be viewed stereoscopically, comprising: a source of a repetitive three color sequence of light; first and second imagers responsive to respective drive signals representative of the same picture from different angles of view; at least a first polarizing beam splitter for separating said repetitive three-color sequence of light into a P polarized three color sequence of light and an S polarized three color sequence of light, said S polarized three color sequence of light illuminating said first imager and said P polarized three color sequence of light illuminating said second imager; a first filter for removing P polarized light directed to said first imager; and, a second filter for removing P polarized light reflected from said second imager, wherein said light reflected from said first imager and said light filtered by said second filter form a stereoscopic image when viewed through respective P and S polarizing lenses.

Abstract: A stereoscopic projection system is provided having two channels, each having two LCOS imagers that modulate light on a pixel-by pixel basis. A first polarizing beam splitter is configured to direct light of a first polarization onto a first channel first stage LCOS imager and direct light of a second polarization, opposite the first polarization, onto a second channel first stage LCOS imager. A relay lens system directs the output of the first stage imagers into a second polarizing beam splitter. The second polarizing beam splitter is configured to direct light of the second polarization onto the first channel second stage LCOS imager and direct light of the first polarization onto the second channel second stage LCOS imager.

Abstract: A two-stage light projection system is provided for projecting an image comprising a matrix of light pixels having modulated luminance. A first imager is configured to modulate a light band on a pixel-by-pixel basis proportional to gray scale values provided for each pixel of the image to provide a first output matrix. A second imager is positioned and configured to receive the first output matrix and modulate the individual modulated pixels of light from the first imager on a pixel-by-pixel basis proportional to a second gray scale value provided for each pixel. A relay lens system having a single-gauss lens set and a mirror positioned at the system stop focuses the modulated light output from the first imager on a pixel-by-pixel basis onto the corresponding pixels of the second imager.

Abstract: A light valve projection system (30) includes a plurality of resonant microcavity anodes (RMAs) (32, 42, and 52), each for emitting a respective wavelength of light and an imager device (38, 48, and 58) for each of the plurality of resonant microcavity anodes, where each of the imager devices emits an image. The light valve projection system further includes a plurality of polarizing beam splitters (34, 44, and 54) for reflecting and redirecting the light and images from the RMAs and the imager devices. The light valve projection system may further include a combiner (40) for combining the image from each of the imager devices and a projection lens (50) for receiving a combined image from the combiner.

Abstract: A projection television receiver having red, green and blue image projectors for respective images of different colors and a high gain projection screen formed by at least one hologram disposed on a substrate superimposed on at least one light transmissive panel. The high gain holographic screen provides increased horizontal viewing performance over lenticular (e.g., fresnel) screens without reliance on screens having wide horizontal half viewing angles.

Abstract: A projection television has a screen with a three dimensional hologram on a film substrate for collecting light over a range of incident angles and redirecting the light more nearly forward. Vertical and horizontal holograms can have varying gain across a horizontal viewing span of ±40° and a vertical viewing span of ±20° can be stacked. Image projection tubes project an image onto at least one mirror that reflects the image along an optical path that converges at an angle of projection, &phgr;, between about 0° and 30° relative to an axis orthogonal to the screen. Each tube can have a separate mirror. The hologram redirects the images reflected to an angle of display relative to the orthogonal axis of the screen of from 0 to 5°.

Abstract: The invention concerns an illumination source for a LCOS projection system. The illumination source is a cathode ray tube (CRT) that excites an array of phosphor based resonant microcavities. By selecting a uniform phosphor type for use in the array of resonant microcavities, the CRT can be designed to exclusively generate light of a selected color. The resonant microcavities can be arranged so that the light is projected through an LCOS device to produce an image. A projector lens can also be provided for magnifying and focusing the image for projection on a screen.

Abstract: A light valve projection system (30) includes a plurality of resonant microcavity anodes (RMAs) (32, 42, and 52), each for emitting a respective wavelength of light and an imager device (38, 48, and 58) for each of the plurality of resonant microcavity anodes, where each of the imager devices emits an image. The light valve projection system further includes a plurality of polarizing beam splitters (34, 44, and 54) for reflecting and redirecting the light and images from the RMAs and the imager devices. The light valve projection system may further include a combiner (40) for combining the image from each of the imager devices and a projection lens (50) for receiving a combined image from the combiner.

Abstract: An illumination source for a LCOS projection system, is comprised of a vacuum cavity, an array of field emission display points on a first side of the vacuum cavity, and an array of resonant microcavity anodes on a second side of the vacuum cavity. The field emission display points are electron emitters used to excite array of resonant microcavity anodes to exclusively generate light of a selected color. The light is projected through an LCOS device to produce an image. A projector lens is provided for magnifying and focusing the image for projection on a screen.

Abstract: A projection television is provided comprising at least three image projectors for projecting respective images of different colors onto a holographic projection screen. One of the projectors has a first, shortest optical path disposed in a substantially orthogonal orientation with the holographic projection screen and at least two of the projectors are disposed in adjacent, stepped-relation to one another and have respective optical paths that are (i) selectively defined by the stepped-relation of the projectors; and (ii) converge toward the first optical path in a non-orthogonal orientation so as to define angles of incidence corresponding to a lowest level chromatic aberration of the images by the holographic projection screen. The projection screen is formed by a three dimensional hologram representing a three dimensional array of lenticular elements disposed on a substrate.

Abstract: An East-West switching transistor is coupled between a flyback transformer primary winding and a horizontal deflection output transistor circuit to control retrace energy to obtain an East-West modulation of the deflection current amplitude as required for East-West pincushion raster correction. A pair of series coupled first and second capacitors forming a capacitive voltage divider are coupled to a retrace resonant circuit that includes the deflection winding via a sampling switch, during a first half of a retrace interval, to produce a first ramping capacitor voltage in the first capacitor from a portion of a retrace pulse voltage. The first capacitor is coupled to an East-West pincushion raster correction current for producing a second ramping capacitor voltage in the first capacitor that ramps in an opposite direction. A comparator is responsive to the capacitor voltage for controlling a conduction interval of the East-West switching transistor.

Abstract: In a method for controlling color temperature a projection television having green, blue and red image projectors and a projection screen, holographically improving color shift performance of the screen results in an undesirable controlled input angle characteristic that attenuates images projected thereon at horizontal viewing angles of a few degrees from an axis orthogonal to the screen. Projecting blue images along an optical axis orthogonally aligned with the projection screen and projecting green and red along respective optical axes converging toward the orthogonally aligned optical axis makes it possible to energize the blue and green image projectors at substantially equal energy levels when producing a white image on the screen.

Abstract: A projection light valve system comprises a ring of light sources directed toward a parabolic reflector. The reflector reflects the light to a point of focus. An optical means, such as a lens, directs the light to a beam expander which expands the beam to irradiate a light valve. Multiple arrangements can be used to obtain a multicolor image.