公开(公告)号：US10902777B1

公开(公告)日：2021-01-26

申请号：US16505556

申请日：2019-07-08

Applicant: Apple Inc.

Inventor： Ruo-Gu Huang ,  Kyung Hoae Koo ,  Michael H. Lim ,  Chuang Qian ,  Weijun Yao ,  Yue Jack Chu

IPC: G09G3/3291 ,  G09G3/3233

Abstract: A display driver is disclosed that reduces first frame dimming and flicker in light-emitting diode pixels of a display device. The display driver may receive a display brightness value and determine a value of a dynamic supply voltage parameter based on the display brightness value. Over a first time interval, the display driver may apply a supply voltage that is based on the dynamic supply voltage parameter to one of a gate of a drive transistor of a light-emitting-diode circuit and a channel of the drive transistor. Over a second time interval, the display driver may apply a parking voltage to an anode of a light-emitting diode of the light-emitting-diode circuit and to the channel of the drive transistor. The value of the parking voltage may be below a threshold voltage of the light-emitting diode and correspond to the value of the dynamic supply voltage parameter.