Color correcting contrast enhancement of displays
AssigneeHoneywell International Inc.
InventorsBrent D. Larson, Matthew B. Dubin
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Abstract
Methods and apparatus are provided for color correction and contrast enhancement of projection displays. A visual display system includes a projector having a light source with a fixed spectral output, a display screen receiving the output of the projector and emitting a diffused output, and a color correction contrast enhancement filter positioned between the diffusing screen and a viewer. The filter differentially attenuates primary colors of the emission from the diffusing screen. The method includes projecting a light output from a light source having a fixed spectral output onto a diffusing screen, and attenuating primary colors of the emission from the diffusing screen with a light filter positioned adjacent to the diffusing screen.
Claims18
A visual display system comprising:
- a light source having a fixed spectral output and specific spectral deficiencies;
- a display screen having a viewing surface, said display screen configured to receive said fixed spectral output of said light source and further configured to emit a plurality of primary colors from said viewing surface;
- and
- a colored polarizer positioned adjacent said viewing surface of said display screen, said colored polarizer configured to receive said plurality of primary colors and further configured to attenuate a first primary color of said plurality of primary colors more than a second primary color of said plurality of primary colors, based on the specific spectral deficiencies.
A light balancing system comprising:
- a projector configured to project an image having a plurality of primary color bands;
- a lamp having a fixed spectral output containing specific spectral deficiencies, said lamp configured to illuminate said projector with said fixed spectral output;
- a diffusing screen configured to receive said image from said projector said diffusing screen comprising a viewing surface configured to emit said diffused image having a plurality of primary color bands, and;
- a filter affixed to said viewing surface of said diffusing screen, said filter being configured to receive said diffused image and further configured to differentially attenuate said plurality of primary color bands of said diffused image in order to correct the specific spectral deficiencies.
A method of color correction and contrast enhancement comprising the steps of:
- determining spectral deficiencies of a fixed spectral light output;
- emitting an image with the fixed spectral light output, the image having a plurality of primary color bands;
- and
- differentially attenuating the plurality of primary color bands of the image based on the determined spectral deficiencies.
Dependencies are inferred from the claim text.