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US 6,891,672 B2Granted
High dynamic range display devices
AssigneeThe University of British Columbia
InventorsLorne Whitehead, Greg Ward, Wolfgang Stuerzlinger, Helge Seetzen
Life of this patent
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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. 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.
Claims63
A display comprising:
- a light source;
- a first spatial light modulator located to modulate light from the light source;
- a display screen comprising a second spatial light modulator;
- and,
- an optical system configured to image light modulated by the first spatial light modulator onto a first face of the display screen, wherein,
- each of the first and second spatial light modulators comprises a plurality of controllable elements and for each controllable element of the first spatial light modulator, the second spatial light modulator has more than one corresponding controllable element.
3 more elements
A display comprising:
- a light source;
- a first spatial light modulator located to modulate light from the light source, the first spatial light modulator comprising an array of controllable pixels;
- and,
- a second spatial light modulator located to modulate light modulated by the first spatial light modulator, the second spatial light modulator comprising an array of controllable pixels;
- wherein each pixel of one of the first and second spatial light modulators corresponds to a plurality of pixels of the other one of the first and second spatial light modulators, and
- wherein the light source and first spatial light modulator comprise the light source and first spatial light modulator of a digital projector and the digital projector comprises imaging optics which image the first spatial light modulator onto the second spatial light modulator.
3 more elements
A display comprising:
- first spatial modulation means for providing light spatially modulated at a first spatial resolution;
- a display screen comprising second spatial modulation means for further spatially
- modulating the light at a second resolution different from the first resolution;
- and
- means for controlling the first and second spatial modulation means to display an image defined by image data, wherein,
- each of the first and second spatial modulation means comprises a plurality of controllable elements and for each controllable element of one of the first and second spatial modulation means, the other one of the first and second spatial modulation means has more than one corresponding controllable elements.
3 more elements
A method for displaying an image having a high dynamic range, the method comprising:
- generating light;
- spatially modulating the light according to image data in a first light modulating step;
- and
- imaging the spatially modulated light onto a screen comprising a light modulator.
1 more element
Dependencies are inferred from the claim text.