Patent ID: 6219020
Filing Date: 2001-04-17
Classification: G09G

Abstract:
A liquid crystal display device for displaying an image represented by display data comprising a plurality of pixel data that is sequentially inputted, comprising:a liquid crystal panel having a plurality of pixel display units arranged in M rows and N columns;a gray-scale driver having N pixel data latch circuits provided respectively to each of N columns of said liquid crystal panel, and for supplying gray-scale voltages in accordance with pixel data latched by each of said N pixel data latching circuits, respectively, to corresponding columns of said liquid crystal panel, whereby the gray-scale voltages corresponding to one horizontal line are supplied in parallel to said liquid crystal panel;a scanning driver for selecting a line of said liquid crystal panel, which is to be supplied with the gray-scale voltages for one horizontal line, outputted by said gray-scale driver; anda control circuit for generating a first control signal to be provided to said gray-scale driver and a second control signal to be provided to said scanning driver, on the basis of said display data and a sync signal thereof; wherein,according to said first control signal, said plurality of pixel data sequentially inputted from outside are latched into said pixel data latch circuits in sequence;according to said second control signal, said scanning driver sequentially selects a line of said liquid crystal panel, the line being supplied with the gray-scale voltages corresponding to one horizontal line, outputted by said gray-scale driver; andsaid control circuit generates said first control signal so that at least one pixel data is latched into at least two of said plurality of pixel data latch circuits, when a pixel data number V for one horizontal line of said display data is smaller than N, and generates said second control signal so that the gray-scale voltages for at least one horizontal line are supplied into a plurality of lines of the liquid crystal panel, when a pixel data number H for one vertical line is smaller than M.