公开(公告)号：US11101337B2

公开(公告)日：2021-08-24

申请号：US16872842

申请日：2020-05-12

Applicant: Apple Inc.

Inventor： Yuchi Che ,  Warren S. Rieutort-Louis ,  Tsung-Ting Tsai ,  Abbas Jamshidi Roudbari ,  Jiun-Jye Chang ,  Ting-Kuo Chang ,  Shih Chang Chang ,  Chin-Wei Lin ,  Stephen S. Poon ,  Cheng-Ho Yu ,  ChoongHo Lee ,  Doh-Hyoung Lee ,  Vasudha Gupta ,  Younggu Lee

IPC: H01L27/32 ,  G09G3/3233 ,  H01L51/52 ,  G09G3/00 ,  G09G3/3258 ,  G09G3/3291

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, may be formed from a mesh shaped metal pattern, may have L-shaped path segments, and may include laser-deposited metal on the cathode layer. Data lines may be formed from metal layers in the active area to accommodate the rounded corners of the display.

公开(公告)号：US10964262B1

公开(公告)日：2021-03-30

申请号：US16414512

申请日：2019-05-16

Applicant: Apple Inc.

Inventor： Chin-Wei Lin ,  Shinya Ono ,  Yun Wang

IPC: G09G5/10 ,  G09G3/3233 ,  G09G3/20

Abstract: Techniques for reducing image artifacts on a display s may include receiving image data, such that the image data includes pixel luminance data for a frame of image data. The technique may also include determining an emission duration for a pixel of the plurality of pixels during a sub-frame of the frame of image data based on the pixel luminance data. The technique may also include determining an emission duration extension to apply to the emission duration associated with the sub-frame based on a luminance baseline associated with the sub-frame, a luminance level associated with the sub-frame, and a time period associated with the sub-frame. The technique may then involve sending an emission signal to the pixel, such that the emission signal is configured to cause the pixel to emit light for a duration that correspond to the emission duration and the emission duration extension.

公开(公告)号：US20200302864A1

公开(公告)日：2020-09-24

申请号：US16897129

申请日：2020-06-09

Applicant: Apple Inc.

Inventor： Chin-Wei Lin ,  Hung Sheng Lin ,  Shih Chang Chang ,  Shinya Ono

IPC: G09G3/3233 ,  H01L29/786 ,  G09G3/3266 ,  G09G3/3275 ,  H01L27/12

Abstract: A display may have an array of pixels each of which has a light-emitting diode such as an organic light-emitting diode. A drive transistor and an emission transistor may be coupled in series with the light-emitting diode of each pixel between a positive power supply and a ground power supply. The pixels may include first and second switching transistors. A data storage capacitor may be coupled between a gate and source of the drive transistor in each pixel. Signal lines may be provided in columns of pixels to route signals such as data signals, sensed drive currents from the drive transistors, and predetermined voltages between display driver circuitry and the pixels. The switching transistors, emission transistors, and drive transistors may include semiconducting-oxide transistors and silicon transistors and may be n-channel transistors or p-channel transistors.

公开(公告)号：US20200273928A1

公开(公告)日：2020-08-27

申请号：US16872842

申请日：2020-05-12

Applicant: Apple Inc.

Inventor： Yuchi Che ,  Warren S. Rieutort-Louis ,  Tsung-Ting Tsai ,  Abbas Jamshidi Roudbari ,  Jiun-Jye Chang ,  Ting-Kuo Chang ,  Shih Chang Chang ,  Chin-Wei Lin ,  Stephen S. Poon ,  Cheng-Ho Yu ,  ChoongHo Lee ,  Doh-Hyoung Lee ,  Vasudha Gupta ,  Younggu Lee

IPC: H01L27/32 ,  G09G3/3233 ,  H01L51/52 ,  G09G3/00 ,  G09G3/3258 ,  G09G3/3291

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, may be formed from a mesh shaped metal pattern, may have L-shaped path segments, and may include laser-deposited metal on the cathode layer. Data lines may be formed from metal layers in the active area to accommodate the rounded corners of the display.

公开(公告)号：US10755638B2

公开(公告)日：2020-08-25

申请号：US16325236

申请日：2017-08-10

Applicant: Apple Inc.

Inventor： Cheuk Chi Lo ,  Chin-Wei Lin ,  Chun-Yao Huang ,  Shih Chang Chang

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

Abstract: A display has rows and columns of pixels (22). A data line (Dn) in each column provides image data signals to the pixels of that column. Each row has first and second control lines (select[m], monitor[m]) coupled to the gates of first and second respective transistors (SE, MO) in each pixel. A third transistor in each pixel serves as a drive transistor (DR) and is coupled in series with a light-emitting diode (30) between positive and ground power supply voltages (VDD, VSS). A display driver circuitry in the display characterizes each of the light-emitting diodes in a column using the data line in an adjacent column from that light-emitting diode. Each of the drive transistors in a column is characterized using the data line in that column and the data line in an adjacent column.

公开(公告)号：US10714009B2

公开(公告)日：2020-07-14

申请号：US16678148

申请日：2019-11-08

Applicant: Apple Inc.

Inventor： Chin-Wei Lin ,  Hung Sheng Lin ,  Shih Chang Chang ,  Shinya Ono

IPC: G09G3/3233 ,  H01L29/786 ,  G09G3/3266 ,  G09G3/3275 ,  H01L27/12

Abstract: A display may have an array of pixels each of which has a light-emitting diode such as an organic light-emitting diode. A drive transistor and an emission transistor may be coupled in series with the light-emitting diode of each pixel between a positive power supply and a ground power supply. The pixels may include first and second switching transistors. A data storage capacitor may be coupled between a gate and source of the drive transistor in each pixel. Signal lines may be provided in columns of pixels to route signals such as data signals, sensed drive currents from the drive transistors, and predetermined voltages between display driver circuitry and the pixels. The switching transistors, emission transistors, and drive transistors may include semiconducting-oxide transistors and silicon transistors and may be n-channel transistors or p-channel transistors.

公开(公告)号：US10573211B2

公开(公告)日：2020-02-25

申请号：US16361018

申请日：2019-03-21

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Shengkui Gao ,  Hyunwoo Nho ,  Chin-Wei Lin ,  Mohammad B. Vahid Far ,  Jie Won Ryu ,  Kingsuk Brahma ,  Junhua Tan ,  Sun-Il Chang ,  Shinya Ono ,  Jesse A. Richmond ,  Yafei Bi ,  Derek K. Shaeffer

IPC: G09G3/00

Abstract: Systems and methods are provided for differential sensing (DS), difference-differential sensing (DDS), correlated double sampling (CDS), and/or programmable capacitor matching to reduce display panel sensing noise. An electronic device may include one or more processors and an electronic display. The one or more processors may generate image data and adjust the image data based at least in part on display sensing feedback. The electronic display may employ sensing circuitry that obtains the display sensing feedback at least in part by applying test data to a pixel of a column of an active area of the display and differentially senses an electrical value of the pixel in comparison to a reference signal from a different column. This reference signal may provide a common mode noise reference, which is removed by the differential sensing and thereby enhances a quality of the sensed electrical value of the pixel.

公开(公告)号：US20200051500A1

公开(公告)日：2020-02-13

申请号：US16536221

申请日：2019-08-08

Applicant: Apple Inc.

Inventor： Chin-Wei Lin ,  Shinya Ono ,  Zino Lee

IPC: G09G3/3233 ,  G09G3/3258

Abstract: A display may include an array of organic light-emitting diode display pixels having transistors characterized by threshold voltages subject to transistor variations. Compensation circuitry may be used to sense a current from selected display pixels. A display pixel may include a drive transistor, a gate setting transistor for driving a reference voltage onto the gate terminal of the drive transistor, a data loading and current sensing transistor for connecting the drive transistor to a data/current-sensing line, a light-emitting diode, an emission control transistor coupled between the drive transistor and the diode, and an anode resetting transistor for selectively resetting the anode terminal of the diode. During pixel conditioning and current sensing operations, the anode resetting transistor may be constantly turned on to ensure that there is no voltage perturbation at the source terminal of the drive transistor, which can help prevent hysteresis-induced current sensing error.

公开(公告)号：US10522569B2

公开(公告)日：2019-12-31

申请号：US15339376

申请日：2016-10-31

Applicant: Apple Inc.

Inventor： Shinya Ono ,  Chin-Wei Lin ,  Hung Sheng Lin

IPC: H01L27/12

Abstract: Display panels including mirror pixel layouts and power rail bridges are described. In an embodiment, a display panel includes a plurality of power rail bridges joining together a subset of power rails for a plurality of adjacent mirror pixels within a row of mirror pixels.

公开(公告)号：US10431154B2

公开(公告)日：2019-10-01

申请号：US15431337

申请日：2017-02-13

Applicant: Apple Inc.

Inventor： Tsung-Ting Tsai ,  Shinya Ono ,  Chin-Wei Lin ,  Ting-Kuo Chang

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

Abstract: An organic light-emitting diode display may contain an array of display pixels. Each display pixel may have a respective organic light-emitting diode that is controlled by a drive transistor. At low temperatures, it may be necessary to increase the amount of current through an organic light-emitting diode to achieve a desired luminance level. In order to increase the current through the light-emitting diode, the ground voltage level may be lowered. However, this may lead to thin-film transistors within the pixel leaking, which may result in undesirable display artifacts such as bright dots being displayed in a dark image. In order to prevent leakage in the transistors, the transistors may be coupled to separate reference voltage supplies or separate control lines. Additionally, the transistors may be positioned to minimize leakage even at low ground voltage levels.