公开(公告)号：US11978385B2

公开(公告)日：2024-05-07

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

CPC classification number: G09G3/2096 ,  G09G3/2007 ,  G09G2310/0291 ,  G09G2320/0223 ,  G09G2320/0233 ,  G09G2330/021 ,  G09G2360/16

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：US20220059018A1

公开(公告)日：2022-02-24

申请号：US17406012

申请日：2021-08-18

Applicant: Apple Inc.

Inventor： Shatam Agarwal ,  Sean C. Chang ,  Hao-Lin Chiu ,  Fenghua Zheng ,  Pierre-Yves Emelie ,  Yao Chen ,  Marc Albrecht ,  Mingxia Gu ,  Jun Qi ,  Wei Chen

IPC: G09G3/32

Abstract: A light emitting diode (LED) display can calculate a common voltage charge of a line of pixels in the LED display, the common voltage charge comprising a difference between a first line of pixels and a second line of pixels. If the calculated common voltage charge exceeds a predetermined threshold, a toggle matrix can be generated for the line of pixels. The toggle matrix can include a matrix of charge values generated by calculating a difference in charge values for each subpixel a first line of subpixels with each subpixel a second line of subpixels. The LED display can identify one or more regions of subpixels exhibiting the predetermined toggle pattern in the toggle matrix. The LED display can generate a voltage correction charge to apply to affected regions of the display. Alternatively, the subpixels or pixels could be swapped with adjacent pixels to reduce toggling or settling error.

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：US20200294435A1

公开(公告)日：2020-09-17

申请号：US16574572

申请日：2019-09-18

Applicant: Apple Inc.

Inventor： Fenghua Zheng ,  Shatam Agarwal

IPC: G09G3/20

Abstract: Aspects of the subject technology relate to control circuitry for displays. A display control circuitry includes a plurality of amplifiers to drive gamma signals for a pixel array having a plurality of pixels of a display and a segmented resistor string coupled to the plurality of amplifiers. The resistor string includes a plurality of resistor segments with a resistor segment being designed with a modified resistance to modify display performance parameters including at least one of a settling time of an associated gamma signal, a power supply rejection ratio (PSRR) of an amplifier of the plurality of amplifiers, or an output voltage offset of an amplifier of the plurality of amplifiers.

公开(公告)号：US10923012B1

公开(公告)日：2021-02-16

申请号：US16814879

申请日：2020-03-10

Applicant: Apple Inc.

Inventor： Jiaxi Hu ,  Hao-Lin Chiu ,  Shatam Agarwal ,  Kwang Soon Park ,  Joonggun Lee ,  Kyung Wook Kim ,  Shih Chang Chang ,  Fenghua Zheng

IPC: G09G3/20

Abstract: An electronic device may include a display. The display may include display driver circuitry that is configured to provide image data to columns of pixels and gate driver circuitry that is configured to provide control signals to rows of pixels. The display may be operable at a native refresh rate that is equal to the highest refresh rate at which the display has full resolution. The display may also be operable in a high refresh rate mode with a high refresh rate that is twice (or some other scaling factor greater than) the native refresh rate. To enable operation at the high refresh rate mode, vertical resolution of the display may be sacrificed. In other words, rows of pixels may be grouped together into effective rows that are then scanned in sequence. The gate driver circuitry may be formed as thin-film transistor circuitry or from gate driver integrated circuits.

公开(公告)号：US20250095576A1

公开(公告)日：2025-03-20

申请号：US18883524

申请日：2024-09-12

Applicant: Apple Inc.

Inventor： Shatam Agarwal ,  David S Zalatimo ,  Fenghua Zheng ,  Jason N Gomez ,  Nikolaus Hammler ,  Patrick R Cruce ,  Vehbi Calayir ,  Yue Zhang

IPC: G09G3/3233 ,  G09G3/20

Abstract: An electronic device may include a display panel having display pixels and pixel drive circuitry that drives the display pixels based on a set of analog voltages according to display image data. Additionally, the electronic device may include a gamma generator to generate the set of analog voltages and voltage regulating circuitry that adjusts a supply voltage to a portion of the gamma generator based on a brightness setting of the display panel.

公开(公告)号：US11810494B2

公开(公告)日：2023-11-07

申请号：US17820190

申请日：2022-08-16

Applicant: Apple Inc.

Inventor： Jie Won Ryu ,  ByoungSuk Kim ,  David S Zalatimo ,  Graeme M Williams ,  Hyunsoo Kim ,  Hyunwoo Nho ,  Jesse R Manders ,  Kingsuk Brahma ,  Li-Xuan Chuo ,  Sachiko Oda ,  Shatam Agarwal ,  Yao Shi

IPC: G09G3/20 ,  H03M1/10

CPC classification number: G09G3/2044 ,  H03M1/1019 ,  G09G2310/027 ,  G09G2320/0276

Abstract: An electronic device may include an electronic display having multiple display pixels to display an image based on analog voltage signals. The electronic device may also include optical calibration circuitry to generate digital-to-analog converter (DAC) data based on image data associated with the image and dither circuitry to reduce a bit-depth of the DAC data, generating dithered DAC data. Additionally, the electronic device may include a gamma generator having one or more DACs to generate the analog voltage signals based on the dithered DAC data, which may instruct the gamma generator to generate the analog voltage signals indicative of the image data.

公开(公告)号：US20230087480A1

公开(公告)日：2023-03-23

申请号：US17820190

申请日：2022-08-16

Applicant: Apple Inc.

Inventor： Jie Won Ryu ,  ByoungSuk Kim ,  David S. Zalatimo ,  Graeme M. Williams ,  Hyunsoo Kim ,  Hyunwoo Nho ,  Jesse R. Manders ,  Kingsuk Brahma ,  Li-Xuan Chuo ,  Sachiko Oda ,  Shatam Agarwal ,  Yao Shi

IPC: G09G3/20 ,  H03M1/10

Abstract: An electronic device may include an electronic display having multiple display pixels to display an image based on analog voltage signals. The electronic device may also include optical calibration circuitry to generate digital-to-analog converter (DAC) data based on image data associated with the image and dither circuitry to reduce a bit-depth of the DAC data, generating dithered DAC data. Additionally, the electronic device may include a gamma generator having one or more DACs to generate the analog voltage signals based on the dithered DAC data, which may instruct the gamma generator to generate the analog voltage signals indicative of the image data.

公开(公告)号：US20220375388A1

公开(公告)日：2022-11-24

申请号：US17735843

申请日：2022-05-03

Applicant: Apple Inc.

Inventor： Hyunsoo Kim ,  Hyunwoo Nho ,  Hoon Sik Kim ,  Shatam Agarwal ,  Mahdi Farrokh Baroughi

IPC: G09G3/20 ,  G09G3/00

Abstract: The present disclosure relates to systems and methods to control brightness and color output in foldable displays. A foldable electronic display may, when folded, includes a first part in a first plane and a second part in a second plane different from the first plane. A brightness or color setting of the first part may be controlled independently of a brightness or color setting of the second part.

公开(公告)号：US11081032B2

公开(公告)日：2021-08-03

申请号：US16574572

申请日：2019-09-18

Applicant: Apple Inc.

Inventor： Fenghua Zheng ,  Shatam Agarwal

IPC: G09G3/20

Abstract: Aspects of the subject technology relate to control circuitry for displays. A display control circuitry includes a plurality of amplifiers to drive gamma signals for a pixel array having a plurality of pixels of a display and a segmented resistor string coupled to the plurality of amplifiers. The resistor string includes a plurality of resistor segments with a resistor segment being designed with a modified resistance to modify display performance parameters including at least one of a settling time of an associated gamma signal, a power supply rejection ratio (PSRR) of an amplifier of the plurality of amplifiers, or an output voltage offset of an amplifier of the plurality of amplifiers.