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.
Claims9
A method for correcting luminance and chromaticity variations caused by optical aberrations near an edge of a tile in tiled, flat-panel liquid crystal displays (LCDs), the steps comprising:
- a) identifying an optical aberration affecting sub-pixels proximate an edge of an LCD tile, each of said sub-pixels having an effective T-V curve associated therewith;
- b) determining a transfer function for said affected sub-pixels to change one of said effective T-V curves to a predetermined, reference effective T-V curve;
- and
- c) applying an inverse of said transfer function to said affected sub-pixels so that each pixel appears to have substantially said predetermined, reference effective T-V curve.
Dependencies are inferred from the claim text.