Display apparatus
First Claim
1. A display apparatus comprising:
- (a) a light source for forming a beam of light;
(b) illumination optics for shaping and directing said beam of light;
(c) a splitter for splitting said beam of light into at least three color beams of light;
(d) a modulation optical system for each of said three color beams of light, comprising;
(1) a pre-polarizer for polarizing said beam of light to provide a polarized beam of light of a given color;
(2) a wire grid polarization beamsplitter for receiving said polarized beam of light, for transmitting said polarized beam of light having a first polarization, and for reflecting said polarized beam of light having a second polarization orthogonal to said first polarization, wherein subwavelength wires on said wire grid polarization beamsplitter face a reflective spatial light modulator;
(3) an imager field lens that provides nominally telecentric light to said reflective spatial light modulators (4) a reflective spatial light modulator wherein said reflective spatial light modulator receives said polarized beam of light, having either a first polarization or a second polarization, and selectively modulates said polarized beam of light to encode data thereon, providing both modulated light and unmodulated light which differ in polarization;
(5) wherein said reflective spatial light modulator reflects back both said modulated light and said unmodulated light to said wire grid polarization beamsplitter, (6) wherein said wire grid polarization beamsplitter separates said modulated light from said unmodulated light; and
(7) a polarization analyzer that receives said modulated light, and which further removes any residual unmodulated light from said modulated light;
(8) an imaging relay lens in each color that provides an intermediate image of the reflective spatial light modulator from the modulated light for that color;
(e) a dichroic combiner for re-combining the modulated light for each given color, such that the multiple color beams form the respective intermediate images along a common optical axis to form a combined intermediate image; and
(f) a projection lens for imaging said combined intermediate image to a display screen.
9 Assignments
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Accused Products
Abstract
A display apparatus (10) comprises a light source (20) for forming a beam of light. Illumination optics shapes and directs the beam of light. A splitter for splits the beam of light into at least three color beams of light. A modulation optical system (120) for each of the three color beams of light comprises a pre-polarizer (160), a wire grid beamsplitter (170), a reflective spatial light modulator (30), and a polarization analyzer (165). An imaging relay lens (130) in each color provides an intermediate image of the reflective spatial light modulator from the modulated light for that color. A dichroic combiner (26) recombines the modulated light for each given color, such that the multiple color beams form the respective intermediate images along a common optical axis to form a combined intermediate image. A projection lens (32) images the combined intermediate image to a display screen. An imager field lens (140) provides nominally telecentric light to the spatial light modulators.
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Citations
86 Claims
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1. A display apparatus comprising:
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(a) a light source for forming a beam of light;
(b) illumination optics for shaping and directing said beam of light;
(c) a splitter for splitting said beam of light into at least three color beams of light;
(d) a modulation optical system for each of said three color beams of light, comprising;
(1) a pre-polarizer for polarizing said beam of light to provide a polarized beam of light of a given color;
(2) a wire grid polarization beamsplitter for receiving said polarized beam of light, for transmitting said polarized beam of light having a first polarization, and for reflecting said polarized beam of light having a second polarization orthogonal to said first polarization, wherein subwavelength wires on said wire grid polarization beamsplitter face a reflective spatial light modulator;
(3) an imager field lens that provides nominally telecentric light to said reflective spatial light modulators (4) a reflective spatial light modulator wherein said reflective spatial light modulator receives said polarized beam of light, having either a first polarization or a second polarization, and selectively modulates said polarized beam of light to encode data thereon, providing both modulated light and unmodulated light which differ in polarization;
(5) wherein said reflective spatial light modulator reflects back both said modulated light and said unmodulated light to said wire grid polarization beamsplitter, (6) wherein said wire grid polarization beamsplitter separates said modulated light from said unmodulated light; and
(7) a polarization analyzer that receives said modulated light, and which further removes any residual unmodulated light from said modulated light;
(8) an imaging relay lens in each color that provides an intermediate image of the reflective spatial light modulator from the modulated light for that color;
(e) a dichroic combiner for re-combining the modulated light for each given color, such that the multiple color beams form the respective intermediate images along a common optical axis to form a combined intermediate image; and
(f) a projection lens for imaging said combined intermediate image to a display screen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A modulation optical system for providing modulation of an incident light beam comprising:
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(a) a prepolarizer for pre-polarizing said beam of light to provide a polarized beam of light;
(b) a wire grid polarization beamsplitter for receiving said polarized beam of light, for transmitting said polarized beam of light having a first polarization, and for reflecting said polarized beam of light having a second polarization orthogonal to said first polarization, wherein subwavelength wires on said wire grid polarization beamsplitter face a reflective spatial light modulator;
(c) wherein said reflective spatial light modulator receives said polarized beam of light, having either a first polarization or a second polarization, and selectively modulates said polarized beam of light to encode data thereon, providing both modulated light and unmodulated light which differ in polarization;
(d) wherein said reflective spatial light modulator reflects back both said modulated light and said unmodulated light to said wire grid polarization beamsplitter;
(e) wherein a polarization compensator, located between said wire grid polarization beamsplitter and said reflective liquid crystal device, is provided for conditioning oblique light rays;
(f) wherein said wire grid polarization beamsplitter separates said modulated light from said unmodulated light;
(g) a polarization analyzer receives said modulated light, and which further removes any residual unmodulated light from said modulated light; and
wherein said modulation optical system further comprises an imager field lens prior to each of said reflective spatial light modulator to provide nominally telecentric light to said spatial light modulators. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A modulation optical system for providing modulation of an incident light beam comprising:
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(a) polarization optics including at least two polarization devices, where at least one of said polarization devices is a wire grid polarization beamsplitter, wherein said wire grid polarization beamsplitter receives said incident beam of light, and transmits a polarized beam of light having a first polarization, and reflects a polarized beam of light having a second polarization nominally orthogonal to said first polarization, wherein subwavelength wires on said wire grid polarization beamsplitter face a reflective spatial light modulator;
(b) wherein said reflective spatial light modulator receives said polarized beam of light, having either a first polarization or a second polarization, and selectively modulates said polarized beam of light to encode data thereon, providing both modulated light and unmodulated light which differ in polarization;
(c) wherein said reflective spatial light modulator reflects back both said modulated light and said unmodulated light to said wire grid polarization beamsplitter;
(d) wherein a polarization compensator, located between said wire grid polarization beamsplitter and said reflective spatial light modulator, is provided for conditioning oblique light rays;
(e) wherein said wire grid polarization beamsplitter separates said modulated light from said unmodulated light; and
(f) wherein said modulation optical system further comprises an imager field lens prior to said reflective spatial light modulator. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58)
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59. A modulation optical system for providing modulation of an incident light beam comprising:
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(a) polarization optics including at least two polarization devices, where at least one of said polarization devices is a polarization beamsplitter, wherein said polarization beamsplitter receives said incident beam of light, and transmits a polarized beam of light having a first polarization, and reflects a polarized beam of light having a second polarization nominally orthogonal to said first polarization;
(b) wherein a reflective spatial light modulator receives said polarized beam of light, having either a first polarization or a second polarization, and selectively modulates said polarized beam of light to encode data thereon, providing both modulated light and unmodulated light which differ in polarization;
(c) wherein said reflective spatial light modulator reflects back both said modulated light and said unmodulated light to said polarization beamsplitter;
(d) wherein a polarization compensator, located between said polarization beamsplitter and said reflective spatial light modulator, is provided for conditioning oblique light rays;
(e) wherein said polarization beamsplitter separates said modulated light from said unmodulated light; and
(f) wherein said modulation optical system further comprises an imager field lens prior to said reflective spatial light modulator. - View Dependent Claims (60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79)
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80. A display apparatus comprising:
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(a) a light source for forming a beam of light;
(b) illumination optics for shaping and directing said beam of light;
(c) a splitter for splitting said beam of light into at least three color beams of light;
(d) a modulation optical system for each of said three color beams of light, comprising;
(1) a pre-polarizer for polarizing said beam of light to provide a polarized beam of light of a given color;
(2) a transmissive spatial light modulator wherein said transmissive spatial light modulator receives said polarized beam of light, and selectively modulates said polarized beam of light to encode data thereon, providing both modulated light and unmodulated light which differ in polarization;
(3) an imager field lens that provides nominally telecentric light to said transmissive spatial light modulators (4) wherein a polarization analyzer separates said modulated light from said unmodulated light; and
(5) an imaging relay lens in each color that provides an intermediate image of the transmissive spatial light modulator from the modulated light for that color;
(e) a dichroic combiner for re-combining the modulated light for each given color, such that the multiple color beams form the respective intermediate images along a common optical axis to form a combined intermediate image; and
(f) a projection lens for imaging said combined intermediate image to a display screen. - View Dependent Claims (81, 82, 83)
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84. A display apparatus comprising:
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(a) a light source for forming a beam of light;
(b) illumination optics for shaping and directing said beam of light;
(c) a splitter for splitting said beam of light into at least three color beams of light;
(d) a modulation optical system for each of said three color beams of light, comprising;
(1) an angle sensitive optic for directing light into a digital micromirror device;
(2) an imager field lens that provides nominally telecentric light to said digital micromirror device;
(3) a digital micromirror device wherein said digital micromirror device receives said beam of light, and selectively modulates said beam of light to encode data thereon, providing both modulated light and unmodulated light which differs in angular directionality over light;
(4) wherein said digital micromirror device reflects back both said modulated light and said unmodulated light to said angle sensitive optic;
(5) wherein said angle sensitive optic separates said modulated light from said unmodulated light; and
(6) an imaging relay lens in each color that provides an intermediate image of the digital micromirror device from the modulated light for that color;
(e) a dichroic combiner for re-combining the modulated light for each given color, such that the multiple color beams form the respective intermediate images along a common optical axis to form a combined intermediate image; and
(f) a projection lens for imaging said combined intermediate image to a display screen. - View Dependent Claims (85)
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86. A modulation optical system for providing modulation of an incident light beam comprising:
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(a) polarization optics including at least two polarization devices, where at least one of said polarization devices is a polarization beamsplitter, wherein said polarization beamsplitter receives said incident beam of light, and transmits a polarized beam of light having a first polarization, and reflects a polarized beam of light having a second polarization nominally orthogonal to said first polarization;
(b) wherein a reflective spatial light modulator receives said polarized beam of light, having either a first polarization or a second polarization, and selectively modulates said polarized beam of light to encode data thereon, providing both modulated light and unmodulated light which differ in polarization;
(c) wherein said reflective spatial light modulator reflects back both said modulated light and said unmodulated light to said polarization beamsplitter;
(d) wherein said polarization beamsplitter separates said modulated light from said unmodulated light; and
(e) wherein said modulation optical system further comprises an imager field lens prior to said reflective spatial light modulator.
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Specification