Gamma voltage generation circuit

Details Gamma voltage generation circuit Gamma voltage generation circuit

2011-07-05

2011-07-05

Young, Brian (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C341S154000

Reexamination Certificate

active

07973690

ABSTRACT:
A gamma voltage generation circuit is provided. An offset voltage generator generates a first offset voltage by dividing a voltage difference between a first input voltage and a second input voltage based on a first code. A first voltage shifting circuit of a voltage level shifter shifts down a first reference voltage by the first offset voltage to output a first level-shifted voltage. A second voltage shifting circuit of the voltage level shifter shifts down a second reference voltage by the first offset voltage to output a second level-shifted voltage. Each of resistors of a resistor string outputs one of the gamma voltages. A first end and a second end of the resistor string are respectively coupled to a first output terminal and a second output terminal of the voltage level shifter.

REFERENCES:
patent: 7307610 (2007-12-01), Sakaguchi
patent: 7724171 (2010-05-01), Lee et al.
patent: 2009/0244109 (2009-10-01), Chen et al.

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