Patent ID: 6340970
Filing Date: 2002-01-22
Classification: G09G

Abstract:
A liquid crystal display control device for receiving a first video signal and a first synchronous signal to generate a second video signal and a second synchronous signal with which a dot-matrix type liquid crystal panel displays images thereon, including:a clock generating circuit for generating, on the basis of the first synchronous signal, a 1/n-frequency dot clock having a period equal to n times the dot period of the first video signal (n represents an integer not less than 2) and having phase varied on a dot-period basis every frame period of the first video signal; a data input circuit for picking up the first video signal in accordance with the 1/n-frequency dot clock and outputting display data which are digital data; a frame memory in which the display data outputted are stored; and a control circuit for generating the second synchronous signal at a predetermined timing and reading out the display data stored in said frame memory in synchronism with the second synchronous signal to generate the second video signal.