Patent ID: 6388716
Filing Date: 2002-05-14
Classification: H04N

Abstract:
An automatic brightness correction apparatus for automatically correcting the brightness property of an image display device, comprising:a test video signal generator for generating a test video signal at a predetermined level; a level corrector for correcting the level of the test video signal generated by the test video signal generator by using a correction signal pertinent to the signal level; an image display device for displaying the test video signal corrected the level by the level corrector; a brightness information detector for detecting brightness information of the test video signal displayed on the image display device; a benchmark memory for storing benchmarks; a benchmark selector for selecting a benchmark pertinent to the brightness information signal from the benchmark memory; a comparator for comparing the brightness information signal detected by the brightness information detector and the benchmark selected by the benchmark selector; and a controller for controlling the level corrector to revise the correction data pertinent to the signal level of the test video signal in the level corrector based on the comparison result provided from the comparator.