TECHNIQUES FOR MITIGATING DISPLAY ARTIFACTS CAUSED BY COMMON VOLTAGE SETTLING ERROR

    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.

    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.

    Dynamic VCOM compensation
    27.
    发明授权

    公开(公告)号:US11087710B2

    公开(公告)日:2021-08-10

    申请号:US16147045

    申请日:2018-09-28

    Applicant: Apple Inc.

    Abstract: A display includes a plurality of pixels grouped into a plurality of lines of pixels. Each line of pixels of the plurality of lines comprises a group of pixels of the plurality of pixels that are coupled to a common scan line as well and that are coupled to different data lines to individually activate each pixel of the group of pixels. The display also includes a common voltage (VCOM) driving circuit configured to receive a waveform and drive the waveform to the display as a VCOM having a value tailored to an individually activated pixel of the group of pixels.

    Gate line layout configuration
    29.
    发明授权

    公开(公告)号:US10170072B2

    公开(公告)日:2019-01-01

    申请号:US14860397

    申请日:2015-09-21

    Applicant: APPLE INC.

    Abstract: A display device may include pixels and source lines that provide data line signals to the pixels. The display device may also include gate lines that provide gate signals to switches associated with the pixels. The display device may also include vertical gate lines disposed generally parallel to the source lines and coupled to the gate lines at cross point nodes. The display device may also include compensation lines, such that each compensation line is proximate to a respective vertical gate line. The compensation lines may transmit compensation signals having an opposite polarity as compared to respective gate signals to reduce or eliminate a kickback voltage on at least one of the plurality of pixels.

    Display with segmented common voltage paths and common voltage compensation circuits

    公开(公告)号:US09606382B2

    公开(公告)日:2017-03-28

    申请号:US14712311

    申请日:2015-05-14

    Applicant: Apple Inc.

    CPC classification number: G02F1/13306 G02F1/134336 G09G3/3655

    Abstract: A display has an array of pixels controlled by display driver circuitry. Gate driver circuitry supplies gate line signals to rows of the pixels. The pixels may be liquid crystal display pixels. Each pixel may have a common electrode voltage terminal. The display may have a transparent conductive film that forms a common electrode voltage layer that overlaps that array and that is shorted to the common electrode voltage terminals of the pixels. Metal common electrode voltage lines may run across the transparent conductive film to reduce resistance. Metal common electrode voltage paths that are coupled to the metal common electrode voltage lines may run along the left and right edge of the display. Common electrode voltage compensation circuits may receive feedback from the metal common electrode voltage paths. There may be two or more common electrode voltage compensation circuits for both the left and right edges of the display.

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