Channel circuit of source driver

A channel circuit of a source driver, 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 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 is idle, and
• which one 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.