Novatek Microelectronics Corp.

Der-Yuan Tseng

Chih-Hsin Hsu

A gray-scale method for a flat panel display is provided, which includes the following: A plurality of scan-line initial signals are provided during a frame period. The scan-line initial signals are transmitted sequentially. According to the scan-line initial signals, the scan-lines are scanned. In which, the frame period includes X horizontal periods. And each horizontal period includes Y initial periods. X and Y each is a positive integer. The scan-line initial signal Kij is appeared during the jinitial period of the ihorizontal period. In which, the i and j at one to one correspondence. The i and j each is a positive integer where 1&#x2266;i&#x2266;X and 1&#x2266;j&#x2266;Y.

Gray-scale method for a flat panel display

A low-power-consumption source driver for a liquid crystal display is provided. More than one middle voltage level for the level shifter and the output buffer is provided, in addition to the power supply voltage level VDD and the ground level GND, to provide different voltage levels for image data of different polarities. Hence, amplitude of the operational voltage of the level shifters and the analog circuits with different polarities can be reduced. It also can reduce the amplitude of the operational voltage of the level shifter and can reduce significantly the dynamic power consumption of the level shifter and the DAC. Because the voltage amplitude of the circuit is reduced and a low-voltage tolerated device can be used, so that the present invention can further reduce the cost of the circuit.

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Taoyuan County, Taiwan

Der-Yuan Tseng