Method for correcting luminance and chrominance defects of a matrix display and matrix display and circuit for carrying out the method

摘要

The method involves using a circuit containing three memories for primary colour correction look-up tables (LUT) and multipliers for corresponding inputs from a colour decoder. Correction is performed on a pixel to pixel basis. The multiplication products are processed by individual peak limiters (4-6). Unitary correction is applied to the slightly altered part of the picture and multiplied by a coefficient corresponding to the average of the look-up table contents over a number of preceding pixels. Smoothing can be applied to preserve detail threatened by chromatic overcorrection.