Patent ID: 7999778

Claim:
An apparatus for driving a liquid crystal display device, comprising: a liquid crystal display panel where a plurality of data lines are formed; a controlling means coupled with the liquid crystal display panel for controlling division and latching of data and for controlling the sampling of the divided data; and a data driving part coupled with the controlling means that divides input digital data into a plurality of digital data under control of the controlling means, converts the plurality of the latched digital data into a plurality of analog data, and then simultaneously sampled the plurality the analog data to supply the data lines, wherein the data driving part includes a decoder operative to decode the input digital data, a dividing part coupled with the decoder and that divides the decoded digital data into the plurality of digital data in accordance with a corresponding plurality of division control signals supplied from the controlling means, a latcher coupled with the dividing part that latches the plurality of divided digital data to produce the plurality of latched digital data, a D/A converter coupled with the latcher that converts the plurality of latched digital data into the plurality of analog data and a sampling unit coupled with the D/A converter that simultaneously samples the plurality of analog data in accordance with a sampling control signal supplied from the controlling means, wherein the dividing part includes a first plurality of switching devices that switch the decoded digital data sequentially turned on by the plurality of division control signals to the latcher, and the first plurality of switching devices include a plurality of PMOS transistors turned on by the plurality of division control signals, respectively, wherein the D/A converter includes a two plurality of switching devices turned on by the plurality of digital data latched by the latcher that simultaneously switch the plurality of analog data, wherein the DAC comprises a plurality of D/A converter parts, wherein each D/A converter part of the plurality of D/A converter parts has a relative common resistor between each D/A converter part.