Patent
Projection-display apparatus and method providing improved brightness of projected color image
Tetsuo Hattori,Yoshiro Oikawa +1 more
TLDR
In this paper, a representative apparatus for obtaining a bright projected color image is described, in which polarized beam splitters separate s- and p-polarized light for each color into a respective spatial light modulator, and modulated light fluxes produced by the two spatial modulators, which perform modulation of the same image, are analyzed and integrated.Abstract:
Methods and apparatus are disclose for obtaining a bright projected color image. In a representative apparatus, polarized beam splitters (one for each primary color of an image to be projected) separate p-polarized light and s-polarized light for each of the primary colors. Each separated s- and p-polarized light for each color enters a respective spatial light modulator. For each primary color, modulated light fluxes produced by the two spatial light modulators, which perform modulation of the same image, are analyzed and integrated by the polarized beam splitters. The analyzed and integrated light fluxes for each primary color are color integrated, either by projection using separate projection lenses for each color, or by a cross-dichroic prism followed by projection using a single lens.read more
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Patent
Polarizer apparatus for producing a generally polarized beam of light
Douglas P. Hansen,John Gunther +1 more
TL;DR: In this paper, a polarizing system having a light source (23) and a polarising device (10) is described, where the polarizing device is disposed in an unpolarized source light beam for transmitting a transmitted light beam (24) having a first polarization and reflecting a reflected light beam having a second polarization.
Patent
Image projection system with a polarizing beam splitter
TL;DR: In this article, a wire grid polarizing beam splitter is used as both the polarizer and the analyzer in an image projection system, which is capable of being oriented at various angles with respect to the source light beam and modulated beam, and accepts relatively divergent light.
Patent
Projection type image display apparatus
TL;DR: A projection-type color image display as mentioned in this paper includes a light source for emitting white light, a first optical element for dividing the white light into a plurality of colored lights and for converging each colored light to form plurality of spots, the spots of each coloured light being formed at different positions from the positions of the other colored light.
Patent
Reflective liquid-crystal-on-silicon projection engine architecture
TL;DR: In this article, a projection engine for use with liquid-crystal-on-silicon semiconductor imager devices is described, which relates to rear projection television and computer monitor applications, wherein image resolution is higher and image size is larger than is practical with cathode ray tube based technologies.
Patent
Digital cinema projector
TL;DR: In this paper, a first modulation optics system comprises a prepolarizer (212), which prepolarizes a first color beam; a wire grid polarization beamsplitter (224), which transmits a first predetermined polarization state of the prepolarized beam; and a reflective spatial light modulator ( 204), which alters the transmitted prepolarised beam with information and reflects the image bearing first colour beam through the wire grid polarized beam.
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Patent
High brightness full color image light valve projection system
TL;DR: In this article, an electro-optical system for real time projection of very high brightness, full color pictorial images from television or other program sources onto a large display screen from a set of three reflection type AC driven field effect mode birefringent liquid crystal light valves each of which modulates a primary color component video image onto a collimated beam of polarized light of a given primary color by modulating the polarization state thereof.
Patent
Projection-type liquid crystal display apparatus
Hisashi Atarashi,Yutaka Takafuji +1 more
TL;DR: A projection-type liquid crystal display apparatus using liquid crystal cells as light polarizing devices is described in this paper, where the first linearly polarized light penetrating through pixel portions of the first liquid crystal cell (5P) corresponding to bright pixels of the image and the second linearly polarizing light penetrating into pixel portions corresponding to the same bright pixels as the above-mentioned bright pixels through a polarized light composing device (5S) and projects the composed light on the screen through an optical device (9).
Patent
Full color three dimensional projector
TL;DR: In this paper, a full color three dimensional projector comprising a light source for emitting light, a condensing means for condensing the emitted light and converting the light into a parallel light, and a color separating means for separating the parallel light into red, blue and green color components, was described.
Patent
Projector lens system having three lens groups for image projector
Toshio Konno,Shintaro Nakagaki,Ighiro Negishi,Tetsuji Suzuki,Fujiko Tatsumi,Ryusaku Takahashi,Keiichi Maeno +6 more
TL;DR: In this paper, an image projector for projecting a tri-color composite optical image on a screen as a magnified optical image is described, where a reading light beam emitted from a light source is separated into three color beams, e.g., Red, Green and Blue color beams.
Patent
Liquid crystal video projector
TL;DR: In this paper, a dichroic mirror which is arranged that optically modulated light is color-mixed and made incident on a projection lens with variable focal length is presented.