公开(公告)号：WO2021201844A1

公开(公告)日：2021-10-07

申请号：PCT/US2020/025980

申请日：2020-03-31

Applicant: GOOGLE LLC

Inventor： YOUN, Sang Young ,  CHANG, Sun-il ,  CHOI, Wonjae ,  CHOI, Sangmoo

IPC: G09G5/00 ,  G09G5/12 ,  G09G5/18 ,  G09G3/34 ,  G09G3/3208 ,  G09G2300/0861 ,  G09G2310/0237 ,  G09G2320/0247 ,  G09G2320/0252 ,  G09G2320/0257 ,  G09G2320/064 ,  G09G2340/0435 ,  G09G2360/18 ,  G09G2370/06 ,  G09G3/3406 ,  G09G5/006

Abstract: PWM-frame rate misalignment is mitigated through implementation of a discrete variable refresh rate (VRR) scheme. A target frame rate is limited to a frame rate selected from only those frame rates that facilitate alignment of each frame period to a specified edge of a PWM cycle of a brightness control signal of a display panel. This alignment results in each frame period at the selected frame rate starting at a same point in a corresponding PWM cycle and ending at a same point in a corresponding PWM cycle to help ensure a constant effective duty cycle across each successive frame period, which in turn mitigates perception of flicker that otherwise would arise. Further, the discrete VRR scheme can employ a compensation mode for compensating for the delay in rendering or otherwise obtaining a frame for display so as to maintain a consistent duty cycle in the brightness control signal.

公开(公告)号：WO2021145727A1

公开(公告)日：2021-07-22

申请号：PCT/KR2021/000608

申请日：2021-01-15

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： SIN, Youngcheol ,  CHO, Daehyun

IPC: H04N21/462 ,  H04N21/4402 ,  G06N20/00 ,  G09G2310/08 ,  G09G2320/0252 ,  G09G2354/00 ,  G09G2360/18 ,  G09G5/003

Abstract: An electronic device may include a display, and a processor operatively connected to the display. The processor is configured to identify a frame rate of a first application that is currently being executed. The processor is also configured to, based on the frame rate, determine a scanning rate of the display and a frame refresh rate for refreshing a frame related to the first application. The processor is further configured to control a first screen refresh of the first application, based on the scanning rate and the frame refresh rate.

公开(公告)号：WO2022240777A1

公开(公告)日：2022-11-17

申请号：PCT/US2022/028394

申请日：2022-05-09

Applicant: META PLATFORMS TECHNOLOGIES, LLC

Inventor： KIM, Cheonhong ,  CHOI, Min Hyuk ,  QIAO, Wenhao

IPC: G09G3/32 ,  G09G3/3233 ,  G09G2300/0439 ,  G09G2300/0819 ,  G09G2300/0852 ,  G09G2300/0861 ,  G09G2310/0272 ,  G09G2320/0238 ,  G09G2320/0252 ,  G09G3/3291

Abstract: Embodiments relate to a display device with reduced scanning time by using a reference line separate from a data line to improve frame rate of the display device. A first pixel in a first row samples a reference voltage during a first period and samples a data voltage during a second period. A second pixel in a second row adjacent to the first row samples the reference voltage during a third period and samples the data voltage during a fourth period, where the third period overlaps with at least a portion of the second period. The reference voltage is provided by the reference line that is connected to a reference buffer, and the data voltage is provided by the data line connected to a source driver circuit.