Reference voltage selection circuit, display driver,...

Details Reference voltage selection circuit, display driver,... Reference voltage selection circuit, display driver,...

2011-01-25

2011-01-25

Osorio, Ricardo L (Department: 2629)

Computer graphics processing and selective visual display system

Display driving control circuitry

Display power source

C345S087000

Reexamination Certificate

active

07876316

ABSTRACT:
A reference voltage selection circuit includes a first switch element SW1that outputs a first selection voltage among first to third selection voltages as a first reference voltage among first and second reference voltages, a second switch element SW2that outputs the second selection voltage as the first reference voltage, a third switch element SW3that outputs the second selection voltage as the second reference voltage, and a fourth switch element SW4that outputs the third selection voltage as the second reference voltage. The first to fourth switch elements SW1to SW4are ON/OFF-controlled using gamma correction data that contains at least three bits. When the first selection voltage is a ground power supply voltage, reliability can be improved by protecting the first switch element.

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