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

Claim 0:
1. A display driver integrated circuit, comprising:
a gamma circuit configured to generate a plurality of gamma voltages based on gamma control information, a first gamma power supply voltage, and a second gamma power supply voltage;
a control circuit configured to calculate 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, and configured to compare 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; and
an output buffer circuit including a plurality of buffer circuits that provide analog image signals to a plurality of pixels included in a display panel, each of the plurality of buffer circuits including an input stage, an amplification stage, and an output stage, and the input stage including first transistors having a first type and second transistors having a second type,
wherein, in the first driving mode, each of the plurality of buffer circuits is configured to turn off the first transistors included in the input stage, and configured to turn on the second transistors included in the input stage,
wherein, in the second driving mode, each of the plurality of buffer circuits is configured to turn on the first transistors and the second transistors included in the input stage,
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 control circuit is configured to generate 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.