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    Electronic display spatiotemporal dithering systems and methods
    71.
    发明授权
    Electronic display spatiotemporal dithering systems and methods 有权

    公开(公告)号：US10593252B1

    公开(公告)日：2020-03-17

    申请号：US15918886

    申请日：2018-03-12

    Applicant: Apple Inc.

    Inventor： Mahesh B. Chappalli

    IPC: G09G3/20 ,  H04N9/64 ,  H04N5/213

    Abstract: An electronic device may include an electronic display to display an image, based in part on display image data that indicates target luminance of the image using a first bit-depth, and a display pipeline. The display pipeline may include dither processing circuitry to determine a pixel cluster of multiple pixel groups of input image data that indicates target luminance using a second bit-depth greater than the first bit-depth. The dither processing circuitry may also determine a phase combination which associates a different dither phase to each of the pixel groups. The dither processing circuitry may also determine and apply a dither pattern and a dither phase to each pixel group to generate dithered image data corresponding with the display image data with the first bit-depth. The dither pattern may be based in part on the least significant bits of input image data of the pixel groups.

    Dithering techniques for electronic displays
    73.
    发明授权
    Dithering techniques for electronic displays 有权

    公开(公告)号：US10403192B2

    公开(公告)日：2019-09-03

    申请号：US15655591

    申请日：2017-07-20

    Applicant: APPLE INC.

    Inventor： Marc Albrecht ,  Mahesh B. Chappalli ,  Christopher P. Tann ,  Jim C. Chou ,  Guy Cote

    IPC: G09G3/20 ,  G09G3/32 ,  G09G3/36 ,  G09G3/3208

    Abstract: Devices and methods for error diffusion and spatiotemporal dithering are provided. By way of example, a method of operating a display includes receiving a pixel input, a set of pixel coordinates, and a current frame number. A kernel and a particular kernel bit of the kernel is selected from a set of kernels, based upon the pixel input, the pixel coordinates, the frame number, or any combination thereof. A dithered output is determined based at least in part upon the kernel bit. When the display is in a diamond pixel configuration, the dithered output is applied in accordance with a diamond pattern formed by red, blue, or red and blue pixel channels.

    ELECTRONIC DISPLAY COLOR ACCURACY COMPENSATION
    75.
    发明申请
    ELECTRONIC DISPLAY COLOR ACCURACY COMPENSATION 审中-公开

    公开(公告)号：US20190080656A1

    公开(公告)日：2019-03-14

    申请号：US15699366

    申请日：2017-09-08

    Applicant: Apple Inc.

    Inventor： Adria Fores Herranz ,  Guy Côté ,  Arthur L. Spence ,  Mahesh B. Chappalli ,  Peter F. Holland ,  Ross Thompson

    IPC: G09G3/36 ,  G09G3/20

    Abstract: Systems, methods, and non-transitory media are presented that provide for improving color accuracy. An electronic display includes a display region having multiple pixels each having multiple subpixels. The electronic device also includes a display pipeline coupled to the electronic display. The display pipeline is configured to receive image data and perform white point compensation on the image data to compensate for a current drop in the display to cause the display to display a target white point when displaying white. The display pipeline also is configured to correct white point overcompensation on the image data to reduce possible oversaturation of non-white pixels using the white point compensation. Finally, the display pipeline is configured to output the compensated and corrected image data to the electronic display to facilitate displaying the compensated and corrected image data on the display region.

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