Patent ID: 6278437
Filing Date: 2001-08-21
Classification: G09G

Abstract:
An LCD apparatus comprising:a pattern generating circuit for generating a dithering pattern for each of a plurality of shades of color in such a way that the dithering pattern is changed every time an LCD screen of the LCD apparatus is refreshed;a detecting circuit for detecting a shade of color of input image data; anda selecting circuit for selecting, in accordance with an output of the detecting circuit, one of the dithering patterns generating by the pattern generating circuit, whereinimages are displayed on the LCD screen by use of the dithering pattern selected by the selecting circuit, andthe LCD screen is refreshed every 1/2 f second by preparing data for two screens for each pixel and displaying the data of those two screens within a period for displaying one screen, thereby reducing the effect of flickers on the LCD screen, where f represents a vertical frequency of an input video signal.