Patent ID: 11875738
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 16:
17. A method of operating a display driver integrated circuit, the method comprising:
generating a plurality of gamma voltages based on gamma control information, a first gamma power supply voltage, and a second gamma power supply voltage;
calculating a gamma limit value based on panel brightness information, voltage levels of the first and second gamma power supply voltages, and a number of the plurality of gamma voltages;
comparing the gamma limit value with a mode determination reference value to generate a mode determination signal representing one of a first driving mode and a second driving mode;
turning off, by each of a plurality of buffer circuits, first transistors included in an input stage and turning on second transistors included in the input stage in the first driving mode, each of the plurality of buffer circuits including the input stage, an amplification stage, and an output stage, and the input stage including the first transistors having a first type and the second transistors having a second type; and
turning on, by each of the plurality of buffer circuits, the first transistors and the second transistors included in the input stage in the second driving mode,
wherein the gamma limit value includes a first limit value, and the mode determination reference value includes a first mode determination reference value, and
wherein the generating the mode determination signal includes:
comparing the first limit value with the first mode determination reference value; and
generating the mode determination signal representing the first driving mode in response to the first limit value being higher than the first mode determination reference value.