公开(公告)号：US20240005833A1

公开(公告)日：2024-01-04

申请号：US18204927

申请日：2023-06-01

Applicant: Apple Inc.

Inventor： Mahdi Farrokh Baroughi ,  Hopil Bae ,  Seung B Rim ,  Haitao Li ,  Sunmin Jang ,  Ce Zhang

IPC: G09G3/20 ,  G09G3/3233

CPC classification number: G09G3/2007 ,  G09G3/3233 ,  G09G2300/0842 ,  G09G2320/041 ,  G09G2330/021 ,  G09G2310/08 ,  G09G2354/00

Abstract: A control circuit adjusts a value of a source supply voltage VSSEL provided to a display area in an electronic display. The control circuit also adjusts a voltage Vreset applied to the display area to cause the display area to emit light more uniformly under various ambient conditions (e.g., temperature) surrounding the display area. Dynamically changing Vreset is employed to make anode charging dynamics independent of temperature. The control circuit adjusts the source supply voltage VSSEL and the voltage Vreset together to compensate display pixel hysteresis effects and display artifacts caused by temperature changes and brightness changes of the display area and collectively produce images. Dynamically tuning the Vreset and the VSSEL voltages also saves power and improves gray level accuracy for the electronic display.

公开(公告)号：US20230087088A1

公开(公告)日：2023-03-23

申请号：US17894935

申请日：2022-08-24

Applicant: Apple Inc.

Inventor： Mahdi Farrokh Baroughi ,  Sandeep Chalasani ,  Xiang Lu ,  Anurag Mehta ,  Hopil Bae ,  Chaohao Wang ,  Rajesh Velayuthan ,  Steven E. Molesa ,  Yaser Azizi ,  Young Don Bae ,  Sunmin Jang ,  Haitao Li ,  Hari P. Paudel ,  Anatole Huang ,  Tyler R. Kakuda ,  David A. Doyle ,  Wei H. Yao ,  Majid Gharghi ,  Vaibhav D. Patel

IPC: H01L27/15 ,  H01L33/62 ,  G09G3/32 ,  H01L33/38

Abstract: A display may be formed by an array of light-emitting diodes mounted to the surface of a display substrate. The light-emitting diodes may be inorganic light-emitting diodes formed from separate crystalline semiconductor structures. An array of pixel control circuits may be used to control light emission from the light-emitting diodes. Each pixel control circuit may be configured to control one or more respective passive matrices. To control partial pixel cells in the display, a donor pixel control circuit in a partial pixel cell may control the pixels in a receptor partial pixel cell without a pixel control circuit. To mitigate the size of an inactive area of the display, fanout signal lines for the display may be formed in the light-emitting active area of the display. The fanout signal lines may be formed between a row of pixel control circuits and a bottom edge of the light-emitting active area.