DMD-based image display systems
First Claim
Patent Images
1. A projection system comprising:
- (a) a first spatial light modulator (SLM) having a first array of separately addressable pixels, the first SLM adapted to receive light from a light source and to modulate light into a subsequent SLM;
(b) a second SLM having a second array of separately addressable pixels, the second SLM positioned in series with the first SLM to receive modulated light from the first SLM and to direct that light for producing an output; and
(c) a controller coupled to the first SLM for delivering first image data comprising first pulse width modulation data to the first SLM, and coupled to the second SLM, for delivering second image data comprising second pulse width modulation data to the second SLM, wherein the first pulse width modulation data is synchronized with the second pulse width modulation data and each bit duration and split bit duration of the second SLM corresponds to an available bit duration and split bit duration of the first SLM in order to produce a multiplicative effect of a bit time duration for all image intensities to provide a viewable image at said output.
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Abstract
A projection system having a controller and a plurality of reflective SLMs operatively coupled to the controller to receive image data from the controller. The reflective SLMs arc aligned in series to receive light form a light source and to reflect imaging light correlated to the image data.
74 Citations
31 Claims
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1. A projection system comprising:
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(a) a first spatial light modulator (SLM) having a first array of separately addressable pixels, the first SLM adapted to receive light from a light source and to modulate light into a subsequent SLM; (b) a second SLM having a second array of separately addressable pixels, the second SLM positioned in series with the first SLM to receive modulated light from the first SLM and to direct that light for producing an output; and (c) a controller coupled to the first SLM for delivering first image data comprising first pulse width modulation data to the first SLM, and coupled to the second SLM, for delivering second image data comprising second pulse width modulation data to the second SLM, wherein the first pulse width modulation data is synchronized with the second pulse width modulation data and each bit duration and split bit duration of the second SLM corresponds to an available bit duration and split bit duration of the first SLM in order to produce a multiplicative effect of a bit time duration for all image intensities to provide a viewable image at said output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A projection system comprising:
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(a) a first spatial light modulator (SLM) having a first array of separately addressable pixels, the first SLM adapted to receive light from a light source and to modulate light into a subsequent SLM; (b) a second SLM having a second array of separately addressable pixels, the second SLM positioned in series with the first SLM to receive modulated light from the first SLM and to direct that light for producing an output; and (c) a controller coupled to the first SLM, for delivering first image data comprising first pulse width modulation data to the first SLM, and coupled to the second SLM for delivering second image data comprising second pulse width modulation data to the second SLM, wherein the first pulse width modulation data is synchronized with the second pulse width modulation data and each bit duration and split bit duration of the second SLM corresponds to an available bit duration and split bit duration of the first SLM to provide a viewable image at said output, wherein the controller is capable of splitting image data of a higher bit-depth into at least the first image data and the second image data in accordance with a coding scheme, the first and second image data having a lower bit depth than the image data, and wherein the controller is capable of delivering the first image data to the first SLM and the second image data to the second SLM to produce an overall output dynamic range that exceeds a dynamic range limitation of each the first and second SLM. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A method of increasing the contrast ratio of a projection system that comprises a first spatial light modulator (SLM), a second SLM, a light source, a controller, and a projection lens, wherein the first and second SLM each have array of addressable pixels, the meted comprising:
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receiving image data; splitting image data of a higher bit depth into at least first image data and second image data in accordance with a coding scheme, the first and second image data having a lower bit depth than the image data; and delivering the first image data to the first SLM and the second image data to the second SLM to produce an overall output dynamic range that exceeds a dynamic range limitation of each the first and second SLM. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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30. A projection system comprising:
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(a) a first spatial light modulator (SLM) having a first array of separately addressable pixels, the first SLM adapted to receive light from a light source and to modulate light into a subsequent SLM; (b) a second SLM having a second array of separately addressable pixels, the second SLM positioned in series with the first SLM to receive modulated light from the first SLM and to direct that light for producing an output; and (c) a controller coupled to the first SLM for delivering first image data having first intensity data for each pixel in the first array to the first SLM, and coupled to the second SLM for delivering second image data having the second image data comprises second intensity data for each pixel in the second array to the second SLM, wherein the first intensity data and the second intensity data are determined in accordance with a bitmap code such that adjacent products of correlated first intensity data and second intensity data differ in quantity approximately in accordance with human ability to detect variations in light intensity levels and the bitmap code correlates first intensity data with second intensity data, the first and second image data being correlated to provide a viewable image at said output. - View Dependent Claims (31)
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Specification