Embedded and programmable gamma correction circuit and method
OwnerPeter Chang, Welton Shih +1inventors
InventorsPeter Chang, Welton Shih, Shinichi Tanaka
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Abstract
A gamma correction circuit (224) and method of gamma correction. The gamma correction circuit (224) comprises a plurality of digital-to-analog converters (DACs), each DAC having an output, and a register (226) with an output coupled to provide input information to each of the DACs. The output of each of the DACs provides an analog voltage which can be used for gamma correction. A source driver (222) is coupled to each of the DAC outputs. The gamma correction circuit (224) and the source driver (222) may be integral to the same integrated circuit chip.
Claims23
A gamma correction circuit comprising:
- a plurality of digital-to-analog converters (DACs), each DAC having an output;
- and
- a register with an output coupled to provide input information to each of the DACs, wherein the output of each of the DACs provides an analog voltage which can be used for gamma correction.
A display system adapted to receive an output from a video image source, the display system comprising:
- a gamma correction circuit including a plurality of digital-to-analog converters (DACs) coupled to the video image source output, each DAC having an output, the gamma correction circuit including a register with an output coupled to provide input information to each of the DACs, wherein the output of each of the DACs provides an analog voltage which can be used for gamma correction;
- a source driver coupled to the output of each DAC, the source driver having an output;
- and
- a display coupled to the source driver output.
A method of correcting gamma from video image source having an output to a display having an input, comprising:
- coupling a gamma correction circuit comprising a plurality of digital-to-analog converters (DACs) to the video image source output, each DAC having an output, the gamma correction circuit including a register with an output coupled to provide input information to each of the DACs, wherein the output of each of the DACs provides an analog voltage which can be used for gamma correction;
- and
- coupling a source driver to the output of each DAC and the display input.
Dependencies are inferred from the claim text.