公开(公告)号：US11302264B2

公开(公告)日：2022-04-12

申请号：US16510755

申请日：2019-07-12

Applicant: Apple Inc.

Inventor： Shengkui Gao ,  Marc Joseph DeVincentis ,  Yue Jack Chu ,  Sinan Alousi ,  Mohammad Hajirostam ,  Mohammad Ali Jangda ,  Koorosh Aflatooni ,  Pierre-Yves Emelie ,  Yafei Bi ,  Paolo Sacchetto ,  Kasra Omid-Zohoor

IPC: G09G3/3291 ,  G09G3/3233 ,  G09G3/36 ,  H01L27/32

Abstract: A display device may include rows of pixels that display image data on a display and a circuit. The circuit may receive pixel data value of image data for a pixel in a first row of the rows of pixels, determine a weight factor to apply to the pixel data value based on a position of the first row with respect to the other rows, such that each row is associated with a current-resistance (IR) drop across the display. The weight factor is determined based on a respective IR drop associated with the first row. The circuit may also generate a weighted pixel data value based on the weight factor and the pixel data value and send the weighted pixel data value to a display driver circuit that renders the image data via the display.

公开(公告)号：US20210304673A1

公开(公告)日：2021-09-30

申请号：US17191009

申请日：2021-03-03

Applicant: Apple Inc.

Inventor： Shengkui Gao ,  Haifeng Li ,  Sinan Alousi ,  Marc Joseph DeVincentis ,  Yafei Bi ,  Hung Sheng Lin ,  Yi Qiao ,  Paolo Sacchetto ,  Weijun Yao ,  Pierre-Yves Emelie ,  Maofeng Yang ,  Yue Jack Chu

IPC: G09G3/3233

Abstract: A system may include an electronic display panel having pixels, where each pixel may emit light based on a respective programming signal. The system may include a memory storing a map. The processing circuitry may determine a function for each pixel from the map. The processing circuitry may determine a respective control signal based on the function and a target brightness level for each pixel to generate multiple control signals, where the respective control signal is used to generate the respective programing signal for each pixel. The processing circuitry may determine a scaling factor based at least in part on the first map and may scale at least a subset of the multiple control signals based at least in part on the scaling factor.

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.