ADAPTIVE PARKING VOLTAGE TUNING TO OPTIMIZE DISPLAY FRONT-OF-SCREEN WITH DYNAMIC SUPPLY VOLTAGE

• Main Authors: Koo, Kyung Hoae, Huang, Ruo-Gu, Lim, Michael H, Yao, Weijun, Qian, Chuang, Chu, Yue Jack
• Format: Patent
• Language: English
• Published: 14.01.2021
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DISPLAY; EDUCATION; PHYSICS; SEALS

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.