| 摘要 |
A circuit for supplying gamma reference voltages is provided to display stable images in an LCD(Liquid Crystal Display) panel by supplying gamma buffer voltages having the same absolute value to a source driver through buffering of buffers. A circuit for supplying gamma reference voltages includes a source driver(117) and plural gamma buffers(600,610,620,630). The source driver converts digital data into analog data and outputs the converted data to column lines of an LCD(Liquid Crystal Display) panel. The gamma buffers having two buffers supply a reference voltage, which is used for the conversion of the source driver, to the source driver by buffering alternately two gamma reference voltages having the same absolute value in the two buffers according to a frame signal.
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