公开(公告)号：US11410594B1

公开(公告)日：2022-08-09

申请号：US17325215

申请日：2021-05-20

Applicant: NOVATEK MICROELECTRONICS CORP.

Inventor： Chun-Hung Chen ,  Chia-Hsin Tung ,  Hsin-Hung Ou ,  Hung-Yi Lin

IPC: G09G3/20

Abstract: A method of dynamic bias control of a source driver bases on data wing level for power-saving. In order to cover the operating conditions of various loads under normal operations, the output buffer circuit operation is biased. The method utilizes the display gray scale difference between a previous data line and an immediately subsequent data line to determine the bias current to be used for the output buffer. When the difference between the current data line display gray scale and the previous data line display gray scale is not large, the bias current of the output buffer can be reduced. When the difference between the current data line display gray scale and the previous data line display gray scale is large, the bias current of the output buffer is increased and the current of the output buffer is adjusted according to different load conditions to save power.

公开(公告)号：US20210366407A1

公开(公告)日：2021-11-25

申请号：US17123129

申请日：2020-12-16

Applicant: Novatek Microelectronics Corp.

Inventor： Chun-Hung Chen ,  Chia-Hsin Tung ,  Hsin-Hung Ou ,  Hung-Yi Lin

IPC: G09G3/3291 ,  G09G3/3258

Abstract: A driving device and an operation method thereof are provided. The driver device includes a source driver circuit, an output switching circuit, and an equalization control circuit. Two input ends of the output switching circuit are coupled to two output ends of the source driver circuit. Two output ends of the output switching circuit are coupled to two data lines of an LED display panel. The equalization control circuit checks whether sub-pixel data of the two data lines meets a predetermined condition. A plurality of sub-pixels located on a current display line of the LED display panel are reset in a reset period. In a data scanning period after the reset period, the equalization control circuit determines whether to control the output switching circuit to perform an equalization operation on the two data lines according to the checking result.

公开(公告)号：US11302267B2

公开(公告)日：2022-04-12

申请号：US17123129

申请日：2020-12-16

Applicant: Novatek Microelectronics Corp.

Inventor： Chun-Hung Chen ,  Chia-Hsin Tung ,  Hsin-Hung Ou ,  Hung-Yi Lin

IPC: G09G3/3291 ,  G09G3/3258

Abstract: A driving device and an operation method thereof are provided. The driver device includes a source driver circuit, an output switching circuit, and an equalization control circuit. Two input ends of the output switching circuit are coupled to two output ends of the source driver circuit. Two output ends of the output switching circuit are coupled to two data lines of an LED display panel. The equalization control circuit checks whether sub-pixel data of the two data lines meets a predetermined condition. A plurality of sub-pixels located on a current display line of the LED display panel are reset in a reset period. In a data scanning period after the reset period, the equalization control circuit determines whether to control the output switching circuit to perform an equalization operation on the two data lines according to the checking result.