Digital driving circuit, digital-analog converter having decoders with different turn on/off state, and display device thereof

A method of driving a data driving circuit, the method comprising:

• obtaining image data of a digital format;
• generating a plurality of gamma reference voltages based on a reference voltage by a plurality of gamma decoders included in the data driving circuit;
• generating a plurality of global gamma reference voltages, wherein each of the plurality of global gamma reference voltages is generated based on a portion of the plurality of gamma reference voltages;
• outputting one of the plurality of global gamma reference voltages corresponding to the image data of the digital format;
• converting the image data of the digital format into analog data signals based on the one of the plurality of global gamma reference voltages;
• and
• turning off at least some of the plurality of gamma decoders while maintaining remaining gamma decoders among the plurality of gamma decoders except for the at least some of the plurality of gamma decoders in a turn-on state,
• wherein the at least some of the plurality of gamma decoders are turned off based on the image data of the digital format.

A method of driving a data driving circuit, the method comprising:

• obtaining image data of a digital format;
• generating a plurality of gamma reference voltages based on a reference voltage by a plurality of gamma decoders included in the data driving circuit generating a plurality of global gamma reference voltages, wherein each of the plurality of global gamma reference voltages is generated based on a portion of the plurality of gamma reference voltages;
• outputting one of the plurality of global gamma reference voltages corresponding to the image data of the digital format converting the image data of the digital format into analog data signals based on the one of the plurality of global gamma reference voltages;
• turning off at least some of the plurality of gamma decoders while maintaining remaining gamma decoders among the plurality of gamma decoders except for the at least some of the plurality of gamma decoders in a turn-on state;
• and
• comparing most significant bits of the image data of the digital format.