Patent ID: 11942015
Assignee: NOVATEK MICROELECTRONICS CORP.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 23:
24. A source driver, comprising:
a plurality of channel circuits, each of the channel circuits comprising:
an output buffer circuit, at least having a plurality of input terminals and an output terminal, wherein the output terminal of the output buffer circuit is configured to be coupled to a data line of a display panel;
a plurality of digital-to-analog converters, comprising a first digital-to-analog converter and a second digital-to-analog converter, wherein an output terminal of the first digital-to-analog converter is coupled to a first input terminal among the input terminals of the output buffer circuit, and an output terminal of the second digital-to-analog converter is coupled to a second input terminal among the input terminals of the output buffer circuit, wherein when a value of pixel data falls within a first sub-range, the first digital-to-analog converter is configured to convert the pixel data to output a first gamma voltage which falls in a first output voltage range, and when the value of the pixel data falls within second sub-range, the second digital-to-analog converter is configured to convert the pixel data to output a second gamma voltage which falls in a second output voltage range;
wherein for each value of the pixel data, one of the first digital-to-analog converter and the second digital-to-analog converts the pixel data and the other one of the first digital-to-analog converter and the second digital-to-analog does not convert the pixel data, and
each of the first digital-to-analog converter and the second digital-to-analog converts the pixel data depends upon the value of the pixel data.