公开(公告)号：US10964275B2

公开(公告)日：2021-03-30

申请号：US16418748

申请日：2019-05-21

Applicant: Apple Inc.

Inventor： Duane M. Petrovich ,  Sean C. Chang ,  Tobias Jung ,  Pierre-Yves Emelie ,  Marc Albrecht ,  Chen Zheng ,  Andrei E. Toma ,  Kevin W. Sliech ,  Mingxia Gu ,  Wei H. Yao

IPC: G09G3/34 ,  G02F1/13357 ,  G02F1/1335

Abstract: A display may have a pixel array such as a liquid crystal pixel array. The pixel array may be illuminated by a backlight unit that includes an array of light-emitting diodes. A backlight brightness selection circuit may select brightness values for the light-emitting diodes. The backlight brightness selection circuit may select the brightness values based on image data, based on brightness values used in previous image frames, based on device information, and/or based on sensor information. The backlight brightness selection circuit may select the backlight brightness levels to mitigate visible artifacts such as flickering and halo. The backlight levels selected by the backlight brightness selection may be modified by a power consumption compensation circuit. The power consumption compensation circuit may estimate the amount of power consumption required to operate the backlight using the target brightness levels and may modify the target brightness levels to meet maximum power consumption requirements.

公开(公告)号：US20190073962A1

公开(公告)日：2019-03-07

申请号：US15989066

申请日：2018-05-24

Applicant: Apple Inc.

Inventor： Koorosh Aflatooni ,  Warren S. Rieutort-Louis ,  Jean-Pierre S. Guillou ,  Pierre-Yves Emelie ,  Myung-Je Cho ,  Marc Albrecht ,  Graeme M. Williams ,  Sean C. Chang ,  Zhao Wang

IPC: G09G3/3275

Abstract: A display may have an active area that includes display pixels. The display may include an inactive notch region that extends into the active area. Data lines may provide image data from display driver circuitry to the display pixels. The image data may include data signals that correspond to portions of the display that do not include pixels, such as the inactive notch region. The null data signals may cause nonuniformities in the displayed image. The null data signals may be adjusted to minimize the nonuniformities. Null data signals corresponding to the inactive notch region may be adjusted to have gray levels that gradually decrease with distance from the border between the inactive notch and the active area. All of the data signals corresponding to the inactive notch may be set to a uniform gray level.

公开(公告)号：US11170690B2

公开(公告)日：2021-11-09

申请号：US17003730

申请日：2020-08-26

Applicant: Apple Inc.

Inventor： Adria Fores Herranz ,  Chaohao Wang ,  Jun Li ,  Koorosh Aflatooni ,  Pierre-Yves Emelie ,  Sheng Zhang ,  Yingying Tang ,  Yunhui Hou

IPC: G09G3/20 ,  G09G5/10

Abstract: An electronic device may include an electronic display having multiple pixels to display an image based on processed image data. Each of the pixels may include multiple sub-pixels. The electronic device may also include image processing circuitry to receive input image data, in a first color space, having luminance values for each of the sub-pixels. The circuitry may also map the input image data from the first color space to a second color space and apply a multi-dimensional lookup table, based on the input image data in the second color space, to generate compensated image data. The lookup table may receive the luminance values for each of the sub-pixels and output corrected luminance values compensated for an expected amount of current leakage between the sub-pixels. The circuitry may also inversely map the compensated image data from the second color space to the first color space to generate the processed image data.

公开(公告)号：US10573236B1

公开(公告)日：2020-02-25

申请号：US16283473

申请日：2019-02-22

Applicant: Apple Inc.

Inventor： Shengkui Gao ,  Graeme M. Williams ,  Haifeng Li ,  Mohammad Ali Jangda ,  Paolo Sacchetto ,  Pierre-Yves Emelie ,  Shyuan Yang ,  Sinan Alousi ,  Tsung-Ting Tsai ,  Warren S. Rieutort-Louis ,  Weijun Yao ,  Yafei Bi ,  Yue Jack Chu

IPC: G09G3/3233 ,  G09G3/20 ,  G09G3/3266

Abstract: A display may have an array of pixels. Due to the presence of a notch in the display, the display may have some rows that are shorter than other rows in the display, and accordingly different gate line loading. To account for the gate line loading variations, the display driver circuitry may have gate driver circuits that provide different gate line signals to different rows of pixels within the display. In other arrangement, luminance adjustment circuitry may receive image data and generate corresponding compensated image data to account for gate line loading variations between rows of pixels in the display. The image data may be compensated based on the location of the pixel, the gray level of the image data, the display brightness, and/or temperature.

公开(公告)号：US12142207B2

公开(公告)日：2024-11-12

申请号：US17191009

申请日：2021-03-03

Applicant: Apple Inc.

Inventor： Shengkui Gao ,  Haifeng Li ,  Sinan Alousi ,  Marc Joseph DeVincentis ,  Yafei Bi ,  Hung Sheng Lin ,  Yi Qiao ,  Paolo Sacchetto ,  Weijun Yao ,  Pierre-Yves Emelie ,  Maofeng Yang ,  Yue Jack Chu

IPC: G09G3/3233

Abstract: A system may include an electronic display panel having pixels, where each pixel may emit light based on a respective programming signal. The system may include a memory storing a map. The processing circuitry may determine a function for each pixel from the map. The processing circuitry may determine a respective control signal based on the function and a target brightness level for each pixel to generate multiple control signals, where the respective control signal is used to generate the respective programming signal for each pixel. The processing circuitry may determine a scaling factor based at least in part on the first map and may scale at least a subset of the multiple control signals based at least in part on the scaling factor.

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：US10672320B2

公开(公告)日：2020-06-02

申请号：US16132116

申请日：2018-09-14

Applicant: Apple Inc.

Inventor： Hung Sheng Lin ,  Soojin Park ,  Bhadrinarayana L. Visweswaran ,  Chieh-Wei Chen ,  Anshi Liang ,  Marc Albrecht ,  Pierre-Yves Emelie ,  Sean C. Chang ,  Hyunwoo Nho ,  Mohammad Hajirostam ,  Myung-Je Cho ,  Shengkui Gao ,  Wei H. Yao ,  Yafei Bi

IPC: G09G3/20 ,  G09G3/3208

Abstract: A display device may include a processor that may receive image data, such that the image data may include gray level data and display brightness value (DBV) data for a first pixel of a display. The processor may then determine a gain compensation factor associated with the first pixel based on a correction spatial map, a brightness adaptation lookup table (LUT), the gray level data, and the DBV data. The processor may then determine an offset compensation factor associated with the first pixel based on the correction spatial map, the brightness adaptation lookup table (LUT), the gray level data, and the DBV data. The processor may generate compensated gray level data by applying the gain compensation factor and the offset compensation factor to the gray level data and transmit the compensated gray level data to pixel driving circuitry associated with the first pixel.

公开(公告)号：US11120747B2

公开(公告)日：2021-09-14

申请号：US16802756

申请日：2020-02-27

Applicant: Apple Inc.

Inventor： Koorosh Aflatooni ,  Warren S. Rieutort-Louis ,  Jean-Pierre S. Guillou ,  Pierre-Yves Emelie ,  Myung-Je Cho ,  Marc Albrecht ,  Graeme M. Williams ,  Sean C. Chang ,  Zhao Wang

IPC: G09G3/3275

Abstract: A display may have an active area that includes display pixels. The display may include an inactive notch region that extends into the active area. Data lines may provide image data from display driver circuitry to the display pixels. The image data may include data signals that correspond to portions of the display that do not include pixels, such as the inactive notch region. The null data signals may cause nonuniformities in the displayed image. The null data signals may be adjusted to minimize the nonuniformities. Null data signals corresponding to the inactive notch region may be adjusted to have gray levels that gradually decrease with distance from the border between the inactive notch and the active area. All of the data signals corresponding to the inactive notch may be set to a uniform gray level.

公开(公告)号：US20200335047A1

公开(公告)日：2020-10-22

申请号：US16418748

申请日：2019-05-21

Applicant: Apple Inc.

Inventor： Duane M. Petrovich ,  Sean C. Chang ,  Tobias Jung ,  Pierre-Yves Emelie ,  Marc Albrecht ,  Chen Zheng ,  Andrei E. Toma ,  Kevin W. Sliech ,  Mingxia Gu ,  Wei H. Yao

IPC: G09G3/34 ,  G02F1/1335

Abstract: A display may have a pixel array such as a liquid crystal pixel array. The pixel array may be illuminated by a backlight unit that includes an array of light-emitting diodes. A backlight brightness selection circuit may select brightness values for the light-emitting diodes. The backlight brightness selection circuit may select the brightness values based on image data, based on brightness values used in previous image frames, based on device information, and/or based on sensor information. The backlight brightness selection circuit may select the backlight brightness levels to mitigate visible artifacts such as flickering and halo. The backlight levels selected by the backlight brightness selection may be modified by a power consumption compensation circuit. The power consumption compensation circuit may estimate the amount of power consumption required to operate the backlight using the target brightness levels and may modify the target brightness levels to meet maximum power consumption requirements.

公开(公告)号：US10607549B2

公开(公告)日：2020-03-31

申请号：US15989066

申请日：2018-05-24

Applicant: Apple Inc.

Inventor： Koorosh Aflatooni ,  Warren S. Rieutort-Louis ,  Jean-Pierre S. Guillou ,  Pierre-Yves Emelie ,  Myung-Je Cho ,  Marc Albrecht ,  Graeme M. Williams ,  Sean C. Chang ,  Zhao Wang

IPC: G09G3/3275

Abstract: A display may have an active area that includes display pixels. The display may include an inactive notch region that extends into the active area. Data lines may provide image data from display driver circuitry to the display pixels. The image data may include data signals that correspond to portions of the display that do not include pixels, such as the inactive notch region. The null data signals may cause nonuniformities in the displayed image. The null data signals may be adjusted to minimize the nonuniformities. Null data signals corresponding to the inactive notch region may be adjusted to have gray levels that gradually decrease with distance from the border between the inactive notch and the active area. All of the data signals corresponding to the inactive notch may be set to a uniform gray level.