| 摘要 |
A liquid crystal display ( 1 ) includes a liquid crystal panel ( 12 ) including a number of thin film transistors ( 123 ), a timing control circuit ( 16 ), a common voltage generating circuit ( 14 ) and a gamma circuit ( 13 ). The timing control circuit is configured for generating timing signals. The common voltage generating circuit is configured for generating a common voltage. The gamma circuit is configured for generating gray-scale voltages. When the liquid crystal panel is powered on, the common voltage is applied to the liquid crystal panel and reaches a predetermined value before the gray-scale voltages are applied to the liquid crystal panel and comes to predetermined values. And when liquid crystal panel is powered off the common voltage and the gray-scale voltages drops to 0V simultaneously by control of the common voltage generating circuit and the gamma circuit with the thin film transistors switched on.
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