Gamma correction circuit

Abstract

A gamma correction circuit includes: a first set of operational amplifiers each configured as a voltage follower, each of the first set of operational amplifiers including a phase compensation circuit that has a variable current source; and a second operational amplifier configured as a voltage follower, the gamma correction circuit dividing an input voltage so as to generate a plurality of divided voltages, and outputting a plurality of grayscale voltages based on the plurality of divided voltages generated, the first set of operational amplifiers generating a most significant voltage and a least significant voltage of the plurality of grayscale voltages, based on a predetermined divided voltage of the plurality of divided voltages, the second operational amplifier generating an intermediate voltage of the plurality of grayscale voltages, but not the most significant voltage nor the least significant voltage of the grayscale voltages, based on a predetermined divided voltage of the plurality of divided voltages, an output capability of each of the first set of operational amplifiers being larger than an output capability of the second set of operational amplifier, and the variable current source being allowed to change and set a current value to an arbitral value.

Dependencies are inferred from the claim text.