公开(公告)号：US10997914B1

公开(公告)日：2021-05-04

申请号：US16563286

申请日：2019-09-06

Applicant: Apple Inc.

Inventor： Injae Hwang ,  Jiye Lee ,  Yifan Zhang ,  Hyunwoo Nho ,  Sun-Il Chang ,  Junhua Tan ,  Jie Won Ryu ,  Hyunsoo Kim ,  Myungjoon Choi ,  Shiping Shen ,  Kingsuk Brahma ,  Jesse A. Richmond

IPC: G09G5/10 ,  G09G3/3233 ,  G09G3/36 ,  G09G3/3258

Abstract: A system may include a display panel that includes number of pixels that display image data on a display. The system may also include a circuit that measures a voltage associated with a light-emitting diode (LED) of a pixel of the number of pixels in response to the LED receiving a current. In addition to the circuit, the system may employ data processing circuitry that may generate a calibrated prediction model based at least in part on the voltage and the current, such that the calibrated prediction model predicts a change in voltage performance of the LED as the LED ages.

公开(公告)号：US20200335040A1

公开(公告)日：2020-10-22

申请号：US16802354

申请日：2020-02-26

Applicant: Apple Inc.

Inventor： Hyunwoo Nho ,  Myungjoon Choi ,  Hyunsoo Kim ,  Mohammad Ali Jangda ,  Jie Won Ryu ,  Shiping Shen ,  Kingsuk Brahma ,  Chaohao Wang ,  Wei H. Yao ,  Alex H. Pai

IPC: G09G3/3258

Abstract: An electronic device includes a display having multiple regions of pixels. Each pixel includes a diode that emits light based on an amount of current through the diode and a transistor that controls the amount of current flowing through the diode. The electronic device includes driver-integrated circuitry that reduces hysteresis in a first transistor of a first pixel of a region of pixels, settles a threshold voltage of the first transistor, applies a test voltage to the first transistor, and senses a current across the first transistor. The electronic device includes processing circuitry that determines a predetermined voltage based on the current and a predetermined current-voltage relationship determined at an initial temperature, determines a voltage difference between the test voltage and the predetermined voltage, and applies the predetermined voltage and the voltage difference to a second transistor of a second pixel of the region of pixels.

公开(公告)号：US10564774B1

公开(公告)日：2020-02-18

申请号：US16008997

申请日：2018-06-14

Applicant: Apple Inc.

Inventor： Sun-Il Chang ,  Myung-Je Cho ,  Kingsuk Brahma ,  Jesse A. Richmond ,  Hyunsoo Kim ,  Shiping Shen ,  Injae Hwang ,  Rui Zhang ,  Shengkui Gao ,  Hung Sheng Lin ,  Jie Won Ryu ,  Junhua Tan ,  Hyunwoo Nho

IPC: G06F3/041 ,  G02F1/1335

Abstract: Methods for mitigation of sensing error effects in display panels are disclosed. Display panels, such as pixel-based panels, may have circuitry to sense the luminance values, compare measurements with target luminance values, and provide corrections. Sensing errors, such as ones caused by sensor hysteresis and thermal fluctuations, may lead to overcorrections and visible artifacts. Mitigations schemes discussed herein include filtering of sensed signal with low pass filters, partial correction strategies, and feedforward sensing schemes. Circuitry that implements these schemes are also discussed.

公开(公告)号：US20180342193A1

公开(公告)日：2018-11-29

申请号：US15700971

申请日：2017-09-11

Applicant: Apple Inc.

Inventor： Shiping Shen ,  Derek K. Shaeffer ,  Baris Cagdaser ,  Hyunwoo Nho ,  Kingsuk Brahma ,  Hung Sheng Lin ,  Injae Hwang ,  Jie Won Ryu ,  Hyunsoo Kim ,  Junhua Tan ,  Rui Zhang ,  Shengkui Gao ,  Mohammad B. Vahid Far ,  Jesse A. Richmond ,  Sun-Il Chang

IPC: G09G3/20 ,  G09G3/3233 ,  G09G3/36

CPC classification number: G09G3/2092 ,  G09G3/006 ,  G09G3/20 ,  G09G3/3233 ,  G09G3/3648 ,  G09G2320/0209 ,  G09G2320/0219 ,  G09G2320/0233 ,  G09G2320/0285 ,  G09G2320/0295 ,  G09G2320/0693 ,  G09G2330/021 ,  G09G2330/06 ,  G09G2330/12

Abstract: Electronic devices and methods for compensating for noise in a display that includes sensing a current in a sensing channel of the display. Compensating for the noise also includes sensing an observation current from noise in an observation channel of the display and scaling the observation current to generate a scaled observation current. The scaled observation current is subtracted from the sense current to generate a compensated output. The compensated output is used to drive compensation operations of the display based at least in part on the compensated output to reduce effects of the noise.

公开(公告)号：US12211435B2

公开(公告)日：2025-01-28

申请号：US18470216

申请日：2023-09-19

Applicant: Apple Inc.

Inventor： Sun-Il Chang ,  Kwang Soon Park ,  Hao-Lin Chiu ,  Jie Won Ryu ,  Hyunsoo Kim ,  Hyunwoo Nho ,  Wei Xiong ,  Patrick R Cruce

IPC: G09G5/10 ,  G01R31/28 ,  G09G3/3208

Abstract: An electronic device may include an electronic display having a gate-on-array (GOA) that generates gate signals in response to an activation signal, pixels that activate in response to a combination of the gate signals and data signals indicative of image data, and sensing circuitry. The sensing circuitry may measure a characteristic response of a gate signal a characteristic response of one or more pixels, or both and compare the characteristic responses to baselines. The electronic device may also include compensation circuitry that applies a compensation to the activation signal and/or to the image data based on the comparisons between the characteristic responses and the baselines.

公开(公告)号：US20240169903A1

公开(公告)日：2024-05-23

申请号：US18470216

申请日：2023-09-19

Applicant: Apple Inc.

Inventor： Sun-Il Chang ,  Kwang Soon Park ,  Hao-Lin Chiu ,  Jie Won Ryu ,  Hyunsoo Kim ,  Hyunwoo Nho ,  Wei Xiong ,  Patrick R. Cruce

IPC: G09G3/3208

CPC classification number: G09G3/3208 ,  G09G2300/0408 ,  G09G2300/0413 ,  G09G2310/0289 ,  G09G2320/045

Abstract: An electronic device may include an electronic display having a gate-on-array (GOA) that generates gate signals in response to an activation signal, pixels that activate in response to a combination of the gate signals and data signals indicative of image data, and sensing circuitry. The sensing circuitry may measure a characteristic response of a gate signal a characteristic response of one or more pixels, or both and compare the characteristic responses to baselines. The electronic device may also include compensation circuitry that applies a compensation to the activation signal and/or to the image data based on the comparisons between the characteristic responses and the baselines.

公开(公告)号：US11756481B2

公开(公告)日：2023-09-12

申请号：US17469816

申请日：2021-09-08

Applicant: Apple Inc.

Inventor： Hyunsoo Kim ,  Kingsuk Brahma ,  Myungjoon Choi ,  Yue Jack Chu ,  Li-Xuan Chuo ,  Hassan Edrees ,  Chin-Wei Lin ,  Hyunwoo Nho ,  Shinya Ono ,  Alex H. Pai ,  Jie Won Ryu ,  Yao Shi ,  Chaohao Wang

IPC: G09G3/3233 ,  G09G3/3266

CPC classification number: G09G3/3233 ,  G09G3/3266 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2320/0247 ,  G09G2320/041 ,  G09G2320/0626 ,  G09G2360/12

Abstract: Systems, methods, and devices are provided for mitigating visual artifacts by dynamically tuning bias voltages applied to display pixels. An electronic display may include a display pixel and a bias voltage supply. The bias voltage supply may supply a first bias voltage to the display pixel for a first subframe of a frame of image data. The bias voltage supply may supply a different second bias voltage to the display pixel for a second subframe of the frame of image data. This may mitigate certain image artifacts, such as flicker or variable refresh rate luminance difference, that could arise due to display pixel hysteresis that varies across subframes of the image frame.

公开(公告)号：US20220076627A1

公开(公告)日：2022-03-10

申请号：US17469816

申请日：2021-09-08

Applicant: Apple Inc.

Inventor： Hyunsoo Kim ,  Kingsuk Brahma ,  Myungjoon Choi ,  Yue Jack Chu ,  Li-Xuan Chuo ,  Hassan Edrees ,  Chin-Wei Lin ,  Hyunwoo Nho ,  Shinya Ono ,  Alex H. Pai ,  Jie Won Ryu ,  Yao Shi ,  Chaohao Wang

IPC: G09G3/3233

Abstract: Systems, methods, and devices are provided for mitigating visual artifacts by dynamically tuning bias voltages applied to display pixels. An electronic display may include a display pixel and a bias voltage supply. The bias voltage supply may supply a first bias voltage to the display pixel for a first subframe of a frame of image data. The bias voltage supply may supply a different second bias voltage to the display pixel for a second subframe of the frame of image data. This may mitigate certain image artifacts, such as flicker or variable refresh rate luminance difference, that could arise due to display pixel hysteresis that varies across subframes of the image frame.

公开(公告)号：US11164515B2

公开(公告)日：2021-11-02

申请号：US16603188

申请日：2018-03-27

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Hyunwoo Nho ,  Sun-Il Chang ,  Junhua Tan ,  Jie Won Ryu ,  Shengkui Gao ,  Rui Zhang ,  Injae Hwang ,  Kingsuk Brahma ,  Jesse Aaron Richmond ,  Shiping Shen ,  Hyunsoo Kim

IPC: G09G3/3216 ,  G09G3/3225 ,  G09G3/3233

Abstract: An electronic device comprises an electronic display having an active area having a pixel. The electronic device also comprises processing circuitry configured to receive image data to send to the pixel and adjust the image data to generate corrected image data based at least in part on a stored correction value for the pixel. The processing circuitry also is configured to generate a test data to send to the pixel subsequent to sending corrected image data to the pixel, wherein the test data is selected based upon a comparison of at least one aspect of the corrected image data with a threshold value.

公开(公告)号：US11158253B1

公开(公告)日：2021-10-26

申请号：US16563500

申请日：2019-09-06

Applicant: Apple Inc.

Inventor： Injae Hwang ,  Hung Sheng Lin ,  Hyunwoo Nho ,  Sun-Il Chang ,  Rui Zhang ,  Mohammad B. Vahid Far ,  Kingsuk Brahma ,  Jesse A. Richmond ,  Hyunsoo Kim ,  Junhua Tan

IPC: G09G3/3233 ,  G09G3/3275

Abstract: A display device may include a plurality of pixels configured to display image data on a display. The display device may also include a circuit that measures a first current associated with a light-emitting diode (LED) of a pixel of the plurality of pixels in response to the circuit receiving a first data voltage. The circuit may also measure a second current associated with the LED of the pixel of the plurality of pixels in response to the circuit receiving a second data voltage. The circuit may then determine a voltage associated with the LED based at least in part on the first current and the second current.