Compensation for edge effects and cell gap variation in tiled flat-panel, liquid crystal displays
AssigneeRainbow Displays, Inc.
InventorsRaymond G. Greene, J. Peter Krusius, Dean W. Skinner, Boris Yost
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Abstract
The present invention features procedures for correcting discoloration and brightness variations due to liquid crystal cell gap variations or other optical, electro-optical, ambient light, electronic, mechanical, and materials anomalies arising in tiled, flat-panel displays. The purpose of these corrections is to achieve a visually seamless appearance. Absolute, relative and/or smoothing corrections are implemented by performing pixel data video processing with correction data acquired from memory. Techniques for determining and applying these corrections are described.
Claims8
A method for producing a tiled, flat-panel LCD having substantially uniform luminance and chromaticity and having visually imperceptible seams, the steps comprising:
- a) arranging a plurality of individual display tiles with seams therebetween, each of said tiles comprising an array of pixels, said pixels comprising sub-pixels, each of said sub-pixels comprising a liquid crystal cell having a respective effective T-V curve;
- b) providing driver means for presenting sub-pixel stimulation signals to said sub-pixels, said driver means comprising a plurality of driver chips, each of said plurality of driver chips being operatively connected to a predetermined group of said sub-pixels;
- c) modifying the effective T-V curve of each of said sub-pixels and associated driver chips in a predetermined manner;
- d) adjusting the luminance and chromaticity of sub-pixels disposed at interior regions of said individual display tiles to a predetermined level;
- and
- e) adjusting the luminance and chromaticity of sub-pixels proximate said seams substantially to a predetermined grey scale excitation level.
Dependencies are inferred from the claim text.