公开(公告)号：US20240404479A1

公开(公告)日：2024-12-05

申请号：US18328329

申请日：2023-06-02

Applicant: Apple Inc.

Inventor： Shereef Shehata ,  Jim C. Chou

IPC: G09G3/3291

Abstract: An electronic display may include a display panel comprising a plurality of display pixels, an image source configured to store image data, and image processing circuitry. The image processing circuitry may receive a brightness level of the display panel and receive the image data that may include gray level data for a first display pixel of the plurality of display pixels. The image processing circuitry may convert the gray level data to voltage data based on the brightness level, determine a compensation for the voltage data based on a global voltage compensation value and a local voltage compensation value, and apply the compensation to the voltage data to generate compensated voltage data. The image processing circuitry may compress a range of the compensated voltage data and convert the compensated voltage data into compensated gray level data for the first display pixel.

公开(公告)号：US11955054B1

公开(公告)日：2024-04-09

申请号：US17933776

申请日：2022-09-20

Applicant: Apple Inc.

Inventor： Jim C Chou ,  Shereef Shehata ,  Yung-Chin Chen

IPC: G09G3/20

CPC classification number: G09G3/2096 ,  G09G2320/0233 ,  G09G2320/043 ,  G09G2320/046 ,  G09G2320/0626 ,  G09G2340/0407 ,  G09G2354/00

Abstract: A device may include a display that display an image frame that is divided into adjustable regions having respective resolutions based on compensated image data. The device may also include image processing circuitry to generate the compensated image data by applying gains that compensate for burn-in related aging of pixels of the display. The gains are based on an aggregation of history updates indicative of estimated amounts of aging associated with pixel utilization. The circuitry may generate a history update by obtaining boundary data indicative of the boundaries between the adjustable regions, determining an estimated amount of aging, and dynamically resampling the estimated amount of aging by resampling a portion of the estimated amount of aging corresponding to an adjustable region by a factor and resampling of a different portion of the estimated amount of aging corresponding to another adjustable region by a different factor based on the boundary data.

公开(公告)号：US11929021B1

公开(公告)日：2024-03-12

申请号：US18328617

申请日：2023-06-02

Applicant: Apple Inc.

Inventor： Shereef Shehata ,  Jim C Chou ,  Sheng Zhang ,  Shengchang Cai

IPC: G09G3/3208 ,  G06F3/01

CPC classification number: G09G3/3208 ,  G06F3/013 ,  G09G2320/0214

Abstract: Systems and methods are provided for using an optical crosstalk compensation (OXTC) block to compensate for optical crosstalk resulted from a combination of viewing angle change across field of view (FoV), color filter (CF) crosstalk, and the OLED various angle color shift (VACS) of a foveated electronic display. One or more two-dimensional (2D) OXTC factor maps are used to determine OXTC factors for input image data of the OXTC block, and the OXTC factors are updated on a per frame basis. Offset values are determined using a parallel architecture and used to determine the OXTC factors. Compensation weights are used to determine weighted OXTC factors to improve processing efficiency. Output image data are obtained by applying the weighted OXTC factors to the input image data.

公开(公告)号：US11741918B1

公开(公告)日：2023-08-29

申请号：US17511375

申请日：2021-10-26

Applicant: Apple Inc.

Inventor： Shengchang Cai ,  Sheng Zhang ,  Sterling G. Orsten ,  Shereef Shehata

IPC: G09G5/10 ,  G06F3/01 ,  G09G3/3208

CPC classification number: G09G5/10 ,  G06F3/013 ,  G09G3/3208 ,  G09G2320/0646 ,  G09G2320/0686 ,  G09G2354/00 ,  G09G2360/16

Abstract: It may be desirable to implement a vignetting effect in a display. The vignetting effect causes the display to have a light-emitting area that gradually fades to a black, non-light-emitting area. The vignetting effect allows for the size and shape of the light-emitting area to be controlled while still being aesthetically pleasing to a viewer. To implement a vignetting mask for the vignetting effect, control circuitry in the electronic device may apply dimming factors to image data for the display. To avoid artifacts caused by the vignetting mask, an initial array of dimming factors for implementing the vignetting mask may have a range between −0.5 and 1.5. After upsampling, clamping may be performed to reduce the range of the dimming factors to between 0 and 1. Ultimately, the dimming factors are applied to image data for each frame to implement the vignetting mask in each frame.

公开(公告)号：US10438561B2

公开(公告)日：2019-10-08

申请号：US15842383

申请日：2017-12-14

Applicant: Apple Inc.

Inventor： Shereef Shehata ,  Christopher P. Tann ,  Guy Côté

IPC: G09G5/06 ,  G09G5/39 ,  G06T11/00 ,  G06T3/40

Abstract: Systems and methods for interpolating overdrive values using a lookup table to compensate for potential display artifacts. Interpolating includes applying a first interpolation type to a first portion of the lookup table when a point to be interpolated is in the first portion of the lookup table. However, interpolating includes applying a second interpolation type to a second portion of the lookup table when the point to be interpolated is in the second portion of the lookup table. The interpolated values are then used to drive pixels of a display panel.