公开(公告)号：WO2020060736A1

公开(公告)日：2020-03-26

申请号：PCT/US2019/048638

申请日：2019-08-28

Applicant: APPLE INC.

Inventor： CALAYIR, Vehbi ,  PIPER, Johan L.

IPC: G09G3/34

Abstract: Aspects of the subject technology relate to control circuitry for light-emitting diodes (LEDs). The control circuitry may include an LED timing controller integrated circuit configured to receive data from host circuitry for an electronic device, an LED row driver integrated circuit, the LED row driver integrated circuit configured to connect a high voltage power rail to the light-emitting diodes via plurality of switches, and LED column driver integrated circuits each configured to adjust a current through at least one of the light-emitting diodes.

公开(公告)号：WO2019152874A1

公开(公告)日：2019-08-08

申请号：PCT/US2019/016399

申请日：2019-02-01

Applicant: APPLE INC.

Inventor： LE, Chengrui ,  WANG, Chaohao ,  TAO, Li ,  HONG, Lingyu ,  SACCHETTO, Paolo ,  ZHANG, Sheng ,  LI, Xiaokai ,  TANG, Yingying ,  HOU, Yunhui ,  PIPER, Johan L.

IPC: G09G3/34

CPC classification number: G09G3/3406 ,  G09G3/342 ,  G09G3/36 ,  G09G2320/0247 ,  G09G2320/0261 ,  G09G2320/041 ,  G09G2320/0606 ,  G09G2320/062 ,  G09G2320/0633 ,  G09G2320/064 ,  G09G2320/0646 ,  G09G2320/103 ,  G09G2340/0435 ,  G09G2354/00 ,  G09G2360/16

Abstract: Aspects of the subject technology relate to pulsed backlight operation for a display backlight. Backlight pulse patterns are provided that include steady state pulse patterns to be applied during operation of a liquid crystal display unit of the display at a corresponding frame rate. The backlight pulse patterns can be arranged to prevent visible artifacts such as flicker or strobing, particularly at or near a transition between LCD frame rates. In some scenarios, transition pulse patterns are provided.