F. Chau & Associates, LLC
Liquid crystal display and driving device thereof
The present invention discloses a data driver and a liquid crystal display including the same capable of solving the problems on the liquid crystal display and of decreasing the number of input pins of an external side by generating gamma reference voltages at internal or external side.According to the present invention, a digital gamma storage is provided with digital gamma data for each of R, G and B through predetermined data bus from an external device on the basis of a predetermined gamma load signal, and a gamma reference voltage generator generates gamma reference voltages for gray display, which are used in converting display data into analog data, for each of R, G and B independently, on the basis of the stored digital gamma data for each of R, G and B. A digital-to-analog converter converts image data for each of R, G and B into analog voltages to output them on the basis of the generated gamma reference voltages.As a result, it is possible to solve the problems on image quality of the liquid crystal display as well as to decrease the number of input pins of the external side by generating the gamma reference voltages for each of R, G and B without receiving them from an external device to control so that each of the R, G and B has an independent gamma curve.
Samsung Electronics Co., Ltd.
G G G
G09G G09G G09G
inventional additional additional
Seung-Woo
Lee