Gamma correcting circuit

摘要: PROBLEM TO BE SOLVED: To obtain a uniform video signal by correcting color unevenness and luminance due to the manufacture variation of display device generating gamma characteristics according position on screen. SOLUTION: This circuit is equipped with input terminal 17, polygonal point value setting 11 which specifies values points as many 2 raised (N)th power plus 1, screen control 19 outputs information multiple divided areas, offset 20 sets quantity be added set corresponding an adding 21 adds output 20, selecting 12 end line 13 start position, 14 controls circuits high-order digit bits 16 from at variable mixing ratio, 15 ratio low-order in data 17.