Patent ID: 6831621
Filing Date: 2004-12-14
Classification: G09G

Abstract:
A liquid crystal display device comprising:a transmissive liquid crystal display panel devoid of any color filter; an image data processor for converting one frame of an image including a plurality of color components into a plurality of subframes each consisting of a single color component to output said subframes in predetermined order; a driver circuit for driving said liquid crystal display panel based on said subframes received from said image data processor; a backlight for illuminating a backside of said liquid crystal display panel, and including a light source for emitting light of a plurality of colors; a backlight controller for controlling said backlight to turn on to emit light of a color corresponding to a color component of each of said subframes in a time-shared manner in synchronism with the time at which said driver circuit writes each of said subframes into said liquid crystal display panel; a judging circuit for calculating difference data between adjacent ones of said subframes which are successive in display order on a pixel-by-pixel basis to judge whether or not there is a subframe-to-subframe difference therebetween on a line-by-line basis, based on said difference data for one line; and a controller for temporarily shortening a write cycle duration of a clock for defining the timing of writing of image data for a line judged by said judging circuit to be devoid of the subframe-to-subframe difference into said liquid crystal display panel, wherein said driver circuit reduces a pulse width of an address signal to be applied to a scanning line of said liquid crystal display panel in accordance with said write cycle duration.