公开(公告)号：US20240013692A1

公开(公告)日：2024-01-11

申请号：US18212710

申请日：2023-06-21

Applicant: Apple Inc.

Inventor： Jie Won Ryu ,  Ardra Singh ,  Arthur L. Spence ,  Christopher P. Tann ,  Chun Lu ,  Daniel J. Drusch ,  Hyunwoo Nho ,  Jongyup Lim ,  Kingsuk Brahma ,  Marc J. DeVincentis ,  Mohammad Ali Jangda ,  Paolo Sacchetto ,  Peter F. Holland ,  Shawn P. Hurley ,  Wei H. Yao ,  Yue Jack Chu ,  Zhe Hua

IPC: G09G3/20

CPC classification number: G09G3/20 ,  G09G2330/021 ,  G09G2360/16 ,  G09G2320/103

Abstract: To reduce overall power consumption for an electronic display power management integrated circuit (PMIC), one of multiple electric power converters and/or electric power regulators may be selected based on an electrical load (e.g., due to the total brightness of the content displayed) on the electronic display at a given moment. In some embodiments, the PMIC may include a less efficient heavy load converter designed with high-current handling capability and a more efficient light load (e.g., low current) converter with lower current handling capability. A controller may dynamically select between the converters depending on a present load or an expected load on the electronic display.

公开(公告)号：US20230197020A1

公开(公告)日：2023-06-22

申请号：US17988721

申请日：2022-11-16

Applicant: Apple Inc.

Inventor： Shengkui Gao ,  Jie Won Ryu ,  Kingsuk Brahma ,  Marc J DeVincentis ,  Mohammad Ali Jangda ,  Paolo Sacchetto ,  Weijun Yao ,  Yafei Bi ,  Yang Xu ,  Yue Jack Chu ,  Zhe Hua

IPC: G09G3/34 ,  G09G3/36

CPC classification number: G09G3/3426 ,  G09G3/3611 ,  G09G2330/021 ,  G09G2360/16

Abstract: This disclosure provide various techniques for tracking emission profiles on an electronic display. An emission profile may be applied to the electronic display in order to illuminate certain pixels and deactivate (e.g., turn off) certain pixels in the electronic display to facilitate refreshing (e.g., programming with new image data) the deactivated pixels. A real-time row-based average pixel level or average pixel luminance calculation architecture may track the one or more EM profiles to accurately model EM profile behavior, which may enable accurate calculation of the average pixel level or average pixel luminance of the electronic display at any one point in time. The accurate average pixel level or average pixel luminance calculations effectuated by the EM profile tracking may be used to reduce the IR drop, improve real-time peak-luminance control, and improve the performance of under-display sensors, among other advantages.

公开(公告)号：US20230089942A1

公开(公告)日：2023-03-23

申请号：US17889242

申请日：2022-08-16

Applicant: Apple Inc.

Inventor： Yao Shi ,  Wei H Yao ,  Hyunwoo Nho ,  Jie Won Ryu ,  Kingsuk Brahma ,  Li-Xuan Chuo ,  Hyunsoo Kim ,  Myungjoon Choi ,  Ce Zhang ,  Alex H Pai ,  Shengkui Gao ,  Rungrot Kitsomboonloha ,  Shatam Agarwal ,  Vehbi Calayir ,  Chaohao Wang ,  Steven N Hanna ,  Pei-En Chang

IPC: G09G3/20

Abstract: This disclosure provides various techniques for providing fine-grain digital and analog pixel compensation to account for voltage error across an electronic display. By employing a two-dimensional digital compensation and a local analog compensation, a fine-grain and robust pixel compensation scheme may be provided to the electronic display.

公开(公告)号：US11488529B2

公开(公告)日：2022-11-01

申请号：US16849712

申请日：2020-04-15

Applicant: Apple Inc.

Inventor： Injae Hwang ,  Jesun Kim ,  Hyunwoo Nho ,  Jie Won Ryu ,  Hyunsoo Kim ,  Junhua Tan ,  Myungjoon Choi ,  Rebecca Park ,  Shiping Shen ,  Sun-Il Chang ,  Shengkui Gao ,  Kingsuk Brahma ,  Jesse Aaron Richmond ,  Changki Min ,  Yifan Zhang ,  Jiye Lee ,  Chaohao Wang

IPC: G09G3/3233 ,  G09G3/00

Abstract: A current-voltage (IV) relationship of a pixel having a diode is initially determined. A first voltage is determined that does not cause the diode to emit light, and a first current across the diode is sensed by applying the first voltage. A predetermined current is determined based on the first voltage and the IV relationship. A ratio is determined based on the first current, a target current, and the predetermined current. A ratio voltage is determined by applying the ratio to a predetermined target voltage. If the first current is less than the predetermined current, then the ratio voltage is applied to supply a target current to the diode. If the first current is greater than the predetermined current, then a second voltage is determined by averaging the first test voltage and the ratio voltage, and the second voltage is applied to supply the target current to the diode.

公开(公告)号：US11282458B2

公开(公告)日：2022-03-22

申请号：US16897206

申请日：2020-06-09

Applicant: Apple Inc.

Inventor： Hyunsoo Kim ,  Injae Hwang ,  Jesun Kim ,  Jesse A. Richmond ,  Junhua Tan ,  Jie Won Ryu ,  Hyunwoo Nho ,  Kingsuk Brahma ,  Chaohao Wang ,  Shiping Shen ,  Myungjoon Choi ,  Myung-Je Cho ,  Rebecca Park ,  Sun-Il Chang

IPC: G09G3/32 ,  G09G3/3258 ,  G09G3/36 ,  G06F3/044

Abstract: Systems and methods are presently disclosed that compensate for temperature-based parasitic capacitance variation of a pixel of a display by causing a driver transistor of the pixel to enter an ohmic or linear region. A lookup table is generated based on temperatures at the pixel, diode voltages, and target diode currents or luminances at a diode of the pixel. A correction voltage is determined based on a target diode current or luminance, a temperature at the pixel, and the lookup table. A data voltage is applied corresponding to the target diode current or luminance and the correction voltage to the driver transistor.

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：US11158256B2

公开(公告)日：2021-10-26

申请号：US16762846

申请日：2018-09-28

Applicant: Apple Inc.

Inventor： Chin-Wei Lin ,  Fan Gui ,  Hung Sheng Lin ,  Hyunwoo Nho ,  Jie Won Ryu ,  Junhua Tan ,  Kingsuk Brahma ,  Majid Gharghi ,  Mohammad Reza Esmaeili Rad ,  Shinya Ono ,  Yun Wang ,  Zino Lee

IPC: G09G3/3233 ,  G09G3/3275

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 in-frame current sensing operations, the emission control transistor may be turned off to decouple the drive transistor from the diode, thereby blocking off any residue current and lateral leakage current that may be present at the diode.

公开(公告)号：US20210118349A1

公开(公告)日：2021-04-22

申请号：US17016282

申请日：2020-09-09

Applicant: Apple Inc.

Inventor： Myungjoon Choi ,  Kingsuk Brahma ,  Li-Xuan Chuo ,  Mohammad Ali Jangda ,  Hyunsoo Kim ,  Hyunwoo Nho ,  Alex H. Pai ,  Jesse Aaron Richmond ,  Jie Won Ryu ,  Shiping Shen ,  Chaohao Wang

IPC: G09G3/20 ,  G06F3/044

Abstract: An electronic display may include pixel circuitry to display an image based on image data compensated for voltage variations within the pixel circuitry. Image processing circuitry may generate a compensation value to compensate the image data for cross-talk (e.g., electromagnetic coupling between an electrode of touch sensor circuitry and an electrode of the pixel circuitry) that may cause the voltage variations. Additionally or alternatively, the image processing circuitry may generate another compensation value to compensate the image data for another cross-talk (e.g., electromagnetic coupling between two electrodes of the pixel circuitry). The image processing circuitry may generate the compensated image data based on the first compensation value and/or the second compensation value.

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.