High luminance projection displays and associated methods
AssigneeDolby Laboratories Licensing Corporation
InventorsGerwin Damberg, Martin J. Richards, Craig Todd
Life of this patent
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Abstract
Projection displays include a highlight projector and a main projector. Highlights projected by the highlight projector boost luminance in highlight areas of a base image projected by the main projector. Various highlight projectors are based on steerable beams, holographic projectors, and spatial light modulators. A Fourier transform component and a mask positioned on the Fourier plane thereof are used to attenuate or eliminate selected spatial frequencies, e.g., to increase peak luminance without raising the black level of the projected image.
Claims18
A method for displaying images, comprising:
- spatially modulating first light according to a desired image with a first spatial light modulator;
- Fourier transforming the first light representing the desired image onto a Fourier plane of a Fourier transform component;
- producing second light by attenuating or eliminating one or more frequency components of the Fourier transformed light by a mask positioned on the Fourier plane;
- spatially modulating the second light according to the desired image with a second spatial light modulator;
- generating the first light with a first light source;
- and
- generating third light with a second light source;
- and
- wherein the second spatial light modulator is configured to spatially modulate both the second light and the third light according to the desired image, the second light and the third light being spatially overlapped on the second spatial light modulator.
A display system, comprising:
- a first spatial light modulator configured to spatially modulate first light according to a desired image;
- a Fourier transform component configured to Fourier transform the first light representing the desired image onto a Fourier plane;
- a mask positioned on the Fourier plane and configured to produce second light by attenuating or eliminating one or more frequency components of the Fourier transformed light;
- a second spatial light modulator configured to spatially modulate the second light according to the desired image;
- a first light source configured to generate the first light and
- a second light source configured to generate third light and
- wherein the second spatial light modulator is configured to spatially modulate both the second light and the third light according to the desired image, the second light and the third light being spatially overlapped on the second spatial light modulator.
Dependencies are inferred from the claim text.