Patent ID: 6275207
Filing Date: 2001-08-14
Classification: G09G

Abstract:
A liquid crystal driving circuit for driving a data line of a liquid crystal panel including the data line and a scan line to apply voltage to a liquid crystal, the liquid crystal driving circuit comprising:a latch address control circuit for successively generating a latch signal to pick up display data;a first holding circuit for picking up and holding the display data of an amount corresponding to an output data line in accordance with the latch signal;a second holding circuit for further picking up and holding the display data, held in the first holding circuit, of the amount corresponding to the output data line in accordance with a horizontal synchronous signal at the same time;a set register for operating setting of a gray-scale voltage value of gray-scale voltage;a gray-scale voltage generating circuit for receiving a plurality of different reference voltages and generating gray-scale voltages whose number is larger than that of the reference voltages, in response to an instruction of the set register;a gray-scale voltage selection circuit for selecting the gray-scale voltage in accordance with the display data held in the second holding circuit; andan amplifying circuit for amplifying and outputting the gray-scale voltage selected by the selection circuit.