公开(公告)号：US11189202B1

公开(公告)日：2021-11-30

申请号：US16567989

申请日：2019-09-11

Applicant: Apple Inc.

Inventor： Sun-Il Chang ,  Baris Cagdaser ,  Chaohao Wang ,  Derek Keith Shaeffer ,  Hyunsoo Kim ,  Hyunwoo Nho ,  Injae Hwang ,  Jesse Aaron Richmond ,  Jie Won Ryu ,  Junhua Tan ,  Kingsuk Brahma ,  Myung-Je Cho ,  Myungjoon Choi ,  Shengkui Gao ,  Shiping Shen ,  Wei H. Yao ,  Yunhui Hou

IPC: G09G3/00 ,  G09G3/3258 ,  G09G3/3233

Abstract: A system may include an electronic display panel having multiple pixels for depicting image data and processing circuitry that may receive a first error value representative of a first difference between a first electrical signal measured at a first pixel of the multiple pixels and an expected electrical signal for the first pixel. The first electrical signal may be based on a test signal transmitted to the first pixel and the expected electrical signal may correspond to an expected response of the first pixel based on the test signal. The processing circuitry may filter the first error value to generate a first compensated error value and may filter the first error value based on the first compensated error value to generate a second compensated error value, where the second compensated error value may filter one or more effects of spatial crosstalk between one or more pixels near the first pixel.

公开(公告)号：US10943541B1

公开(公告)日：2021-03-09

申请号：US16556037

申请日：2019-08-29

Applicant: Apple Inc.

Inventor： Junhua Tan ,  Hsin-Ying Chiu ,  Sun-Il Chang ,  Yunhui Hou ,  Jie Won Ryu ,  Hyunwoo Nho ,  Weichuan Yao ,  Shiping Shen ,  Injae Hwang ,  Hyunsoo Kim ,  Myungjoon Choi ,  Shengkui Gao ,  Chaohao Wang ,  Kingsuk Brahma ,  Jesse Aaron Richmond ,  Myung-Je Cho ,  Changki Min ,  Wei H. Yao

IPC: G09G5/00 ,  G09G3/3258 ,  G09G3/32 ,  G09G3/3233

Abstract: Current-voltage shift determination circuitry of a processing core complex coupled to the electronic display determines total current-voltage shift values at a pixel. The current-voltage shift determination circuitry then determines temperature-based current-voltage shift values at the pixel. The current-voltage shift determination circuitry extracts the temperature-based current-voltage shift values from the total current-voltage shift values to determine age-based voltage degradation values. Display compensation circuitry of the processing core complex adjusts display of image data by the pixel based on the age-based voltage degradation values. In this manner, voltage degradation due to pixel aging may be determined separately from current-voltage shift due to temperature, and, as such, be more accurately compensated for, resulting in better display of image data. Compensation may thus be performed based on the age of the pixels and a sensed temperature at the pixels, instead of by constantly sensing current across the diodes of the pixels.

公开(公告)号：US20210056930A1

公开(公告)日：2021-02-25

申请号：US16928882

申请日：2020-07-14

Applicant: Apple Inc.

Inventor： Jaeyoung Kang ,  Jesse Aaron Richmond ,  Mahdi Farrokh Baroughi ,  Hopil Bae ,  John T. Wetherell ,  Kingsuk Brahma ,  Yuichi Okuda ,  Shingo Hatanaka ,  Baris Cagdaser ,  Myungjoon Choi ,  Jie Won Ryu ,  Hyunwoo Nho ,  Yafei Bi ,  Wei H. Yao ,  Henry C. Jen ,  Derek Keith Shaeffer

IPC: G09G5/10 ,  G09G3/20

Abstract: An electronic device may include an electronic display having multiple display pixels. The display pixels may illuminate at a target luminance based at least in part on a first analog voltage signal. The electronic device may also include an electrical bus configured to generate multiple analog voltage signals including the first analog voltage signal, which is output on an output of the electrical bus. The electrical bus may include a digital to analog converter to generate at least some of the analog voltage signals and multiple output buffers to buffer the analog voltage signals. The outputs may be buffered by an output buffer of the output buffers.

公开(公告)号：US10923015B2

公开(公告)日：2021-02-16

申请号：US16335148

申请日：2017-09-20

Applicant: Apple Inc.

Inventor： Derek K. Shaeffer ,  Hopil Bae ,  Yafei Bi ,  Wei H. Yao ,  Xiaofeng Wang

IPC: G09G3/20 ,  G09G3/3225 ,  G06F1/06 ,  G09G3/3266

Abstract: A display device may include a plurality of pixels that may display image data on a display. The display device may also include a circuit that may receive pixel data including a gray level for at least one pixel of the plurality of pixels. The circuit may then receive an emission clock signal using a clock circuit based on the pixel data, such that the emission clock signal may cause the at least one pixel to receive a current for an amount of time based on the gray level. The circuit may then gate off the clock circuit after the amount of time.

公开(公告)号：US20200348789A1

公开(公告)日：2020-11-05

申请号：US16936245

申请日：2020-07-22

Applicant: Apple Inc.

Inventor： Wei Chen ,  Steven P. Hotelling ,  John Z. Zhong ,  William C. Athas ,  Wei H. Yao

IPC: G06F3/041 ,  G09G3/32 ,  H04N9/30 ,  G06F3/044

Abstract: An electronic device may include a display. The display may be formed by an array of light-emitting diodes mounted to the surface of a substrate. The substrate may be a silicon substrate. Circuitry may be located in spaces between the light-emitting diodes. Circuitry may also be located on the rear surface of the silicon substrate and may be coupled to the array of light-emitting diodes using through-silicon vias. The circuitry may include integrated circuits and other components that are attached to the substrate and may include transistors and other circuitry formed within the silicon substrate. Touch sensor electrodes, light sensors, and other components may be located in the spaces between the light-emitting diodes. The substrate may be formed from a transparent material that allows image light to reach a lens and image sensor mounted below the substrate.

公开(公告)号：US20200302871A1

公开(公告)日：2020-09-24

申请号：US16893373

申请日：2020-06-04

Applicant: Apple Inc.

Inventor： Sheng Zhang ,  Chih-Wei Yeh ,  Yunhui Hou ,  Chaohao Wang ,  Wei H. Yao ,  Paolo Sacchetto ,  Derek K. Shaeffer ,  Henry C. Jen ,  Shingo Hatanaka ,  Hasan Akyol ,  Mahdi Farrokh Baroughi ,  Hopil Bae

IPC: G09G3/3258 ,  G09G3/3233

Abstract: An electronic device includes a display having an active array and a reference array. The active array includes a pixel and the reference array includes a reference pixel. The electronic device also includes processing circuitry communicatively coupled to the display. The processing circuitry is configured to instruct the active array to drive the pixel based at least in part on a set of degradation ratios and gamma tap points for each brightness setting of the display based at least in part on a reconstructed current-voltage curve.

公开(公告)号：US10650741B2

公开(公告)日：2020-05-12

申请号：US16132320

申请日：2018-09-14

Applicant: Apple Inc.

Inventor： Sheng Zhang ,  Chengrui Le ,  Hopil Bae ,  Mahdi Farrokh Baroughi ,  David W. Lum ,  Adam Adjiwibawa ,  Chaohao Wang ,  Paolo Sacchetto ,  Wei H. Yao ,  Enkhamgalan Dorjgotov ,  Michael Slootsky ,  Giovanni Carbone ,  Derek K. Shaeffer ,  Henry C. Jen ,  Shingo Hatanaka ,  Hasan Akyol

IPC: G09G3/3233 ,  G09G3/3258 ,  G09G3/3208

Abstract: An electronic device includes a display having a reference array that includes a first pixel. The display also includes a first emission power supply coupled to the first pixel. The display further includes an active array having a second pixel. The display also includes a second emission power supply coupled to the second pixel.

公开(公告)号：US09952265B2

公开(公告)日：2018-04-24

申请号：US14993711

申请日：2016-01-12

Applicant: Apple Inc.

Inventor： Kingsuk Brahma ,  David A. Stronks ,  Hopil Bae ,  Wei H. Yao

IPC: G01R27/20 ,  G09G3/20 ,  G09G3/36 ,  G09G3/00

CPC classification number: G01R27/205 ,  G09G3/006 ,  G09G3/2092 ,  G09G3/2096 ,  G09G3/3607 ,  G09G3/3696 ,  G09G2300/0426 ,  G09G2310/08 ,  G09G2320/0223

Abstract: A display may have a substrate layer to which a display driver integrated circuit and flexible printed circuit are bonded. The display driver integrated circuit may be provided with switches and control circuitry for controlling the operation of the switches during bond resistance measurements. Test equipment may apply currents to pads in the display driver integrated circuit through contacts in the flexible printed circuit while controlling the switching circuitry. Based on these measurements and the measurement of trace resistances in a dummy flexible printed circuit, the test equipment may determine bond resistances for bonds between the display driver integrated circuit and the display substrate and between the flexible printed circuit and the display substrate. Displays may have master and slave display driver integrated circuits that share coarse reference voltages produced by the master from raw power supply voltages.

公开(公告)号：US09952264B2

公开(公告)日：2018-04-24

申请号：US14993702

申请日：2016-01-12

Applicant: Apple Inc.

Inventor： Kingsuk Brahma ,  David A. Stronks ,  Hopil Bae ,  Wei H. Yao

IPC: G09G3/36 ,  G01R27/20 ,  G09G3/20 ,  G09G3/00

CPC classification number: G01R27/205 ,  G09G3/006 ,  G09G3/2092 ,  G09G3/2096 ,  G09G3/3607 ,  G09G3/3696 ,  G09G2300/0426 ,  G09G2310/08 ,  G09G2320/0223

Abstract: A display may have a substrate layer to which a display driver integrated circuit and flexible printed circuit are bonded. The display driver integrated circuit may be provided with switches and control circuitry for controlling the operation of the switches during bond resistance measurements. Test equipment may apply currents to pads in the display driver integrated circuit through contacts in the flexible printed circuit while controlling the switching circuitry. Based on these measurements and the measurement of trace resistances in a dummy flexible printed circuit, the test equipment may determine bond resistances for bonds between the display driver integrated circuit and the display substrate and between the flexible printed circuit and the display substrate. Displays may have master and slave display driver integrated circuits that share coarse reference voltages produced by the master from raw power supply voltages.

公开(公告)号：US20180005562A1

公开(公告)日：2018-01-04

申请号：US15199315

申请日：2016-06-30

Applicant: APPLE INC.

Inventor： Hung Shen Lin ,  Jiayi Jin ,  Wei H. Yao ,  Hyunwoo Nho ,  Guangmao Xing ,  Weijun Yao ,  Xiaofeng Wang ,  Yafei Bi ,  Haifeng Li

IPC: G09G3/20 ,  G09G3/3208

CPC classification number: G09G3/2007 ,  G09G3/3208 ,  G09G3/3233 ,  G09G2310/027 ,  G09G2310/06 ,  G09G2310/066 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/029 ,  G09G2320/0693

Abstract: Systems, methods, and devices are provided to reduce noise present in sensing circuits used for calibrating light emitting diodes (e.g., organic light emitting diodes) in electronic display devices. Such a system may include a display that renders image data using self-emissive pixels. Values on the pixels may be sensed using a current source that outputs a current and a comparator that receives the current. The comparator changes states when a voltage signal output by the capacitor crosses a first threshold voltage or a second threshold voltage. A controller receives a first time when the comparator component changes states based on the voltage signal, receives a second time when the comparator component changes states based on the voltage signal, determines a current value based on the first time and the second time, and calibrates a pixel based on the current value.