Source driver and liquid crystal display using the same

Details Source driver and liquid crystal display using the same Source driver and liquid crystal display using the same

2007-11-06

2007-11-06

Awad, Amr A. (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S209000, C327S333000

Reexamination Certificate

active

10709641

ABSTRACT:
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.

REFERENCES:
patent: 5731796 (1998-03-01), Furuhashi et al.
patent: 6552708 (2003-04-01), Wang et al.
patent: 2003/0155958 (2003-08-01), Yamamoto et al.

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