HDR displays with dual modulators having different resolutions
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.
1. A display comprising:
a light source comprising a two-dimensional array of light emitting elements each having a controllable light output;
a spatial light modulator comprising a plurality of controllable elements located to modulate light from the light source; and,
a controller configured to detect a failure of one of the light emitting elements, and, in response to detecting a failed light emitting element, increase the light output of ones of the light emitting elements neighboring the failed light emitting element and adjust transmissivities of ones of the controllable elements of the spatial light modulator upon which light from the neighboring ones of the light emitting elements is incident to compensate for the failed light emitting element.
2. A display comprising:
a light source comprising a two-dimensional array of light emitting elements each having a controllable light output, each of the light emitting elements corresponding to a location in an image specified by image data;
a spatial light modulator comprising a plurality of controllable elements located to modulate light from the light source; and,
a controller configured to detect a failure of one of the light emitting elements, and, in response to detecting a failed light emitting element, increasing the light outputs of ones of the light emitting elements neighboring the failed light emitting element by amounts based at least in part on the image data for the location corresponding to the failed light emitting element.
3. A display according to claim 1 wherein said ones of the controllable elements of the spatial light modulator include at least one controllable element located to receive light from:
the failed light emitting element, and
at least one of said ones of the light emitting elements neighboring the failed light emitting element.
4. A display according to claim 1 wherein said ones of the controllable elements of the spatial light modulator include at least one controllable element located to not receive light from the failed light emitting element.
5. A display according to claim 1 wherein said ones of the controllable elements of the spatial light modulator comprise at least two controllable elements located to receive light from the failed light emitting element.
6. A display according to claim 1 wherein light output from at least one of said ones of the light emitting elements neighboring the failed light emitting element is incident on:
at least one controllable element located to receive light from the failed light emitting element, and
at least one controllable element not located to receive light from the failed light emitting element.
7. A display according to claim 2 wherein said location corresponding to the failed light emitting element comprises at least part of the location corresponding to one of said ones of the light emitting elements neighboring the failed light emitting element.
8. A display according to claim 7 wherein part of said location corresponding to said one of said ones of the light emitting elements neighboring the failed light emitting element does not comprise any part of said location corresponding to the failed light emitting element.