Edge lit LED based locally dimmed display
First Claim
Patent Images
1. An edge lit locally dimmed display, comprising:
- a spatial light modulator;
a light source configured to cause an illumination on the spatial light modulator;
wherein;
the light source is at an edge and behind a viewing side of the spatial light modulator;
the illumination comprises a series of lighting elements having a spread function causing the illumination to vary smoothly at the spatial light modulator; and
the illumination comprises a low resolution version of a desired image.
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Abstract
A display has a screen which incorporates a light modulator. The screen may be a front projection screen or a rear-projection screen. The screen is illuminated with light from a light source comprising an array of controllable light-emitters. The controllable-emitters and elements of the light modulator may be controlled to adjust the intensity of light emanating from corresponding areas on the screen. The display may provide a high dynamic range.
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Citations
16 Claims
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1. An edge lit locally dimmed display, comprising:
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a spatial light modulator; a light source configured to cause an illumination on the spatial light modulator; wherein; the light source is at an edge and behind a viewing side of the spatial light modulator; the illumination comprises a series of lighting elements having a spread function causing the illumination to vary smoothly at the spatial light modulator; and the illumination comprises a low resolution version of a desired image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A locally dimmed display method, comprising the steps of:
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energizing a lighting device; reflecting light from the energized lighting device onto a spatial light modulator; and modulating the reflected light to produce a desired image; wherein; the reflected light comprises a low resolution version of a the desired image; the lighting device is located at an edge and behind the spatial light modulator; and the reflected light comprises a series of lighting elements that vary smoothly from one element to another at the spatial light modulator. - View Dependent Claims (14, 15, 16)
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Specification