公开(公告)号：US20200219945A1

公开(公告)日：2020-07-09

申请号：US16826521

申请日：2020-03-23

Applicant: Apple Inc.

Inventor： Cheng-Ho Yu ,  Chin-Wei Lin ,  Shyuan Yang ,  Ting-Kuo Chang ,  Tsung-Ting Tsai ,  Warren S. Rieutort-Louis ,  Shih-Chang Chang ,  Yu Cheng Chen ,  John Z. Zhong

IPC: H01L27/32 ,  G09G3/3233 ,  G09G3/3266 ,  G06F3/044

Abstract: A display may have an array of pixels. Display driver circuitry may supply data and control signals to the pixels. Each pixel may have seven transistors, a capacitor, and a light-emitting diode such as an organic light-emitting diode. The seven transistors may receive control signals using horizontal control lines. Each pixel may have first and second emission enable transistors that are coupled in series with a drive transistor and the light-emitting diode of that pixel. The first and second emission enable transistors may be coupled to a common control line or may be separately controlled so that on-bias stress can be effectively applied to the drive transistor. The display driver circuitry may have gate driver circuits that provide different gate line signals to different rows of pixels within the display. Different rows may also have different gate driver strengths and different supplemental gate line loading structures.

公开(公告)号：US10707237B2

公开(公告)日：2020-07-07

申请号：US16125973

申请日：2018-09-10

Applicant: Apple Inc.

Inventor： Vasudha Gupta ,  Jae Won Choi ,  Shih Chang Chang ,  Tsung-Ting Tsai ,  Young Bae Park

IPC: H01L27/12 ,  G02F1/1362 ,  G02F1/1368 ,  H01L27/32 ,  G02F1/1345 ,  H01L29/786

Abstract: An electronic device may include a display having an array of display pixels on a substrate. The display pixels may be organic light-emitting diode display pixels or display pixels in a liquid crystal display. In an organic light-emitting diode display, hybrid thin-film transistor structures may be formed that include semiconducting oxide thin-film transistors, silicon thin-film transistors, and capacitor structures. The capacitor structures may overlap the semiconducting oxide thin-film transistors. Organic light-emitting diode display pixels may have combinations of oxide and silicon transistors. In a liquid crystal display, display driver circuitry may include silicon thin-film transistor circuitry and display pixels may be based on oxide thin-film transistors. A single layer or two different layers of gate metal may be used in forming silicon transistor gates and oxide transistor gates. A silicon transistor may have a gate that overlaps a floating gate structure.

公开(公告)号：US20200152117A1

公开(公告)日：2020-05-14

申请号：US16678203

申请日：2019-11-08

Applicant: Apple Inc.

Inventor： Chin-Wei Lin ,  Hung Sheng Lin ,  Vasudha Gupta ,  Shinya Ono ,  Tsung-Ting Tsai ,  Shyuan Yang

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

Abstract: An electronic device comprises a display and a controller. The controller is configured to provide a first frequency refresh rate to the display. The controller is also configured to generate a control signal configured to control emission of a light emitting diode of a display pixel of the display at a second frequency based on whether the first frequency refresh rate of the display is less than a predetermined threshold value.

公开(公告)号：US10535286B2

公开(公告)日：2020-01-14

申请号：US16255562

申请日：2019-01-23

Applicant: Apple Inc.

Inventor： Vasudha Gupta ,  Chin-Wei Lin ,  Tsung-Ting Tsai

IPC: G09G3/00 ,  G09G3/3266 ,  G09G3/3233

Abstract: A display device may include rows of pixels that may display image data on a display and a circuit. The circuit may perform a progressive scan across the rows of pixels to display the image data using a plurality of pixels, supply test data to a pixel of plurality of pixels that corresponds to a first row of the rows of pixels during one frame of the progressive scan, and initiate a sensing period for determining one or more sensitivity properties associated with the pixel based on the performance of the pixel with respect to the test data in response to receiving a pulse of a first global signal. The circuit may then end the sensing period in response to receiving a second global signal and resume the progressive scan across the rows of pixels to display the image data after the sensing period ends.

公开(公告)号：US20200013342A1

公开(公告)日：2020-01-09

申请号：US16577597

申请日：2019-09-20

Applicant: Apple Inc.

Inventor： Keitaro Yamashita ,  Abbas Jamshidi Roudbari ,  Shin-Hung Yeh ,  Tsung-Ting Tsai ,  Shih-Chang Chang ,  Ting-Kuo Chang ,  Ki Yeol Byun ,  Warren S. Rieutort-Louis

IPC: G09G3/3266

Abstract: An electronic device may include a display such as a light-emitting diode display. The electronic device may be a head-mounted device that provides a virtual reality or augmented reality environment to a user. To reduce artifacts in the display, a display may be operable in both a normal scanning mode and a partial scanning mode. In the normal scanning mode, every row of the display may be enabled to emit light in each frame. In the partial scanning mode, only a subset of the rows of the display may be enabled to emit light in each frame. The display may have a higher refresh rate in the partial scanning mode than in the normal scanning mode. To ensure uniform transistor stress across the display, the scanning driver for the display may scan the disabled rows in the partial scanning mode even though the rows will not be used to emit light.

公开(公告)号：US10482822B2

公开(公告)日：2019-11-19

申请号：US15384096

申请日：2016-12-19

Applicant: Apple Inc.

Inventor： Keitaro Yamashita ,  Abbas Jamshidi Roudbari ,  Shin-Hung Yeh ,  Tsung-Ting Tsai ,  Shih-Chang Chang ,  Ting-Kuo Chang ,  Ki Yeol Byun ,  Warren S. Rieutort-Louis

IPC: G09G3/3266

Abstract: An electronic device may include a display such as a light-emitting diode display. The electronic device may be a head-mounted device that provides a virtual reality or augmented reality environment to a user. To reduce artifacts in the display, a display may be operable in both a normal scanning mode and a partial scanning mode. In the normal scanning mode, every row of the display may be enabled to emit light in each frame. In the partial scanning mode, only a subset of the rows of the display may be enabled to emit light in each frame. The display may have a higher refresh rate in the partial scanning mode than in the normal scanning mode. To ensure uniform transistor stress across the display, the scanning driver for the display may scan the disabled rows in the partial scanning mode even though the rows will not be used to emit light.

公开(公告)号：US20190043418A1

公开(公告)日：2019-02-07

申请号：US15975390

申请日：2018-05-09

Applicant: Apple Inc.

Inventor： Warren S. Rieutort-Louis ,  Shyuan Yang ,  Tsung-Ting Tsai ,  Cheng-Ho Yu ,  Jae Won Choi ,  Bhadrinarayana Lalgudi Visweswaran ,  Abbas Jamshidi Roudbari ,  Ting-Kuo Chang

IPC: G09G3/3216 ,  G09G3/3283 ,  G09G3/3266 ,  H01L27/32

Abstract: A display may have rows and columns of pixels that form an active area for displaying images. A display driver integrated circuit may provide multiplexed data signals to demultiplexer circuitry in the display. The demultiplexer circuitry may demultiplex the data signals and provide the demultiplexed data signals to the pixels on data lines. Gate lines may control the loading of the data signals into the pixels. The display may have a length dimension and a width dimension that is shorter than the length dimension. The data lines may extend parallel to the width dimension and the gate lines may extend parallel to the length dimension such that there are more data lines than gate lines in the display. A notch that is free of pixels may extend into the active area. Data lines extending parallel to the width dimension of the display may be routed around the notch.

公开(公告)号：US20180315357A1

公开(公告)日：2018-11-01

申请号：US15882908

申请日：2018-01-29

Applicant: Apple Inc.

Inventor： Donghee Nam ,  Bhadrinarayana Lalgudi Visweswaran ,  Cheng Chen ,  Meng-Huan Ho ,  Nathan K. Gupta ,  Rui Liu ,  Sebastian Knitter ,  Sudirukkuge T. Jinasundera ,  Tsung-Ting Tsai ,  Weibo Cheng

IPC: G09F13/22 ,  H01L51/52 ,  H01L27/32

Abstract: An electronic device may be provided with a display. The display may have a display cover layer. The display may have an active area with pixels and an inactive area with dummy pixels. The dummy pixels may have structures that are optically matched to the pixels so that the dummy pixels and pixels have similar visual appearances when the display is off. An optical window may be formed in the inactive area. A light-based component such as an ambient light sensor, proximity sensor, or image sensor may be mounted in the electronic device in alignment with the optical window. A polarizer layer may overlap the active and inactive areas of the display. An opening in the polarizer or a bleached unpolarized portion of the polarizer may be aligned with the optical window.

公开(公告)号：US20180204895A1

公开(公告)日：2018-07-19

申请号：US15922727

申请日：2018-03-15

Applicant: Apple Inc.

Inventor： Chin-Wei Lin ,  Stephen S. Poon ,  Warren S. Rieutort-Louis ,  Cheng-Ho Yu ,  ChoongHo Lee ,  Doh-Hyoung Lee ,  Ting-Kuo Chang ,  Tsung-Ting Tsai ,  Vasudha Gupta ,  Younggu Lee

IPC: H01L27/32 ,  G09G3/3291 ,  G09G3/3258 ,  G09G3/00

CPC classification number: H01L27/3248 ,  G09G3/006 ,  G09G3/3233 ,  G09G3/3258 ,  G09G3/3291 ,  G09G2300/0426 ,  G09G2310/0297 ,  H01L27/3246 ,  H01L27/3276 ,  H01L27/3279 ,  H01L51/5228

Abstract: An organic light-emitting diode display may have thin-film transistor circuitry formed on a substrate. The display and substrate may have rounded corners. A pixel definition layer may be formed on the thin-film transistor circuitry. Openings in the pixel definition layer may be provided with emissive material overlapping respective anodes for organic light-emitting diodes. A cathode layer may cover the array of pixels. A ground power supply path may be used to distribute a ground voltage to the cathode layer. The ground power supply path may be formed from a metal layer that is shorted to the cathode layer using portions of a metal layer that forms anodes for the diodes, may be formed from a mesh shaped metal pattern, may have L-shaped path segments, may include laser-deposited metal on the cathode layer, and may have other structures that facilitate distribution of the ground power supply.

公开(公告)号：US20180174505A1

公开(公告)日：2018-06-21

申请号：US15895248

申请日：2018-02-13

Applicant: Apple Inc.

Inventor： Prashant Mandlik ,  Bhadrinarayana Lalgudi Visweswaran ,  Izhar Z Ahmed ,  Zhen Zhang ,  Tsung-Ting Tsai ,  Ki Yeol Byun ,  Yu Cheng Chen ,  Sungki Lee ,  Mohammad Hajirostam ,  Sinan Alousi

IPC: G09G3/32 ,  G01L1/22 ,  G11C19/28 ,  H01L27/32 ,  H01L51/00

CPC classification number: G09G3/32 ,  G01L1/2281 ,  G09G3/3266 ,  G09G3/3677 ,  G09G2300/043 ,  G09G2310/0286 ,  G09G2330/12 ,  G09G2380/02 ,  G11C19/28 ,  H01L27/3225 ,  H01L27/3276 ,  H01L51/0031 ,  H01L51/0097 ,  H01L2251/5338

Abstract: An electronic device may have a flexible display such as an organic light-emitting diode display. A strain sensing resistor may be formed on a bent tail portion of the flexible display to gather strain measurements. Resistance measurement circuitry in a display driver integrated circuit may make resistance measurements on the strain sensing resistor and a temperature compensation resistor to measure strain. A crack detection line may be formed from an elongated pair of traces that are coupled at their ends to form a loop. The crack detection line may run along a peripheral edge of the flexible display. Crack detection circuitry may monitor the resistance of the crack detection line to detect cracks. The crack detection circuitry may include switches that adjust the length of the crack detection line and thereby allow resistances to be measured for different segments of the line.