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    Synchronously and locally turning-off sub pixels in under-display sensor area of AMOLED panel
    11.
    发明授权
    Synchronously and locally turning-off sub pixels in under-display sensor area of AMOLED panel 有权

    公开(公告)号：US10984731B2

    公开(公告)日：2021-04-20

    申请号：US16559491

    申请日：2019-09-03

    Applicant: Google LLC

    Inventor： Sangmoo Choi ,  Sun-il Chang ,  Sang Young Youn

    IPC: G09G3/32 ,  G09G3/3291 ,  G09G3/20

    Abstract: An apparatus is described that includes a display panel and a sensor. The display panel includes an array of pixels configured to direct light through a front side of the display panel. Each pixel includes sub-pixels, each of which includes an organic light emitting diode (OLED) and an integrated circuit (IC) for controlling an electrical current to the OLED. The sensor is arranged at a back side of the display panel. The sensor includes an emitter configured to emit electromagnetic radiation transmitted through a first area of the display panel. The IC of sub-pixels of the array of pixels outside the first area includes a first IC arrangement. The IC of sub-pixels of the array of pixels within the first area includes a transistor in addition to the first IC arrangement. The transistor is configured to operate as a control switch controlling emission of light from the sub-pixel.

    GRADUAL CHANGE OF PIXEL-RESOLUTION IN OLED DISPLAY
    12.
    发明申请
    GRADUAL CHANGE OF PIXEL-RESOLUTION IN OLED DISPLAY 有权

    公开(公告)号：US20210074207A1

    公开(公告)日：2021-03-11

    申请号：US16563739

    申请日：2019-09-06

    Applicant: Google LLC

    Inventor： Sangmoo Choi ,  Sun-il Chang ,  Ion Bita

    IPC: G09G3/3225 ,  H04M1/02

    Abstract: An apparatus is described that includes an organic light emitting diode (OLED) display and a sensor. The OLED display includes a first area having a first pixel density, a second area having a second pixel density, and a third area having a third pixel density. The second area is arranged between the first area and the third area. The first pixel density is lower than the second pixel density. The second pixel density is lower than the third pixel density. The sensor is arranged to receive electromagnetic radiation transmitted through the first area of the OLED display.

    Gray Level Control for Mitigating First Frame Rate Effects
    13.
    发明申请
    Gray Level Control for Mitigating First Frame Rate Effects 有权

    公开(公告)号：US20250014494A1

    公开(公告)日：2025-01-09

    申请号：US18884496

    申请日：2024-09-13

    Applicant: Google LLC

    Inventor： Sangmoo Choi ,  Ka Ho Liu

    IPC: G09G3/20 ,  G04G21/08

    Abstract: This document describes systems and techniques for mitigating a display artifact that may result from first frame rate effects at low luminance levels. For example, in an implementation, a computer-implemented method includes receiving display data to be presented on a display of an electronic device at a display driver. At the display driver, a luminance level of the display data is determined. Responsive to determining at the display driver that the luminance level is below a threshold luminance level, a gray level is determined for one or more regions of the display data. Responsive to determining at the display driver that the gray level for at least one region of the one or more regions is below a baseline gray level for the threshold luminance level, the gray level is increased to an adjusted gray level equal to at least the baseline gray level.

    DISPLAY DEVICE WITH VARIABLE IMAGE RESOLUTION
    15.
    发明公开
    DISPLAY DEVICE WITH VARIABLE IMAGE RESOLUTION 审中-公开

    公开(公告)号：US20240274075A1

    公开(公告)日：2024-08-15

    申请号：US18267516

    申请日：2022-10-31

    Applicant: Google LLC

    Inventor： Sangmoo Choi ,  Choongho Lee

    IPC: G09G3/3233

    CPC classification number: G09G3/3233 ,  G09G2300/0861 ,  G09G2310/021 ,  G09G2310/0297 ,  G09G2330/021 ,  G09G2340/0414

    Abstract: The subject matter described in this disclosure can be embodied in methods, systems, and program products for operating a display device that includes a pixel array addressed by a set of data lines and a set of scan lines. A method includes: addressing the set of data lines with first image data; sending a first scan signal to a first line of pixels using a first scan line to move the first image data to the first line of pixels; activating the first line of pixels to emit light; sending a second scan signal to a second line of pixels using a second scan line, without having addressed the set of data lines with image data after having addressed the set of data lines with the first image data; and activating the second line of pixels to emit light after the second scan signal has been sent.

    Reducing hole bezel region in displays
    16.
    发明授权
    Reducing hole bezel region in displays 有权

    公开(公告)号：US11994920B2

    公开(公告)日：2024-05-28

    申请号：US18202877

    申请日：2023-05-26

    Applicant: Google LLC

    Inventor： Sun-il Chang ,  Sangmoo Choi

    IPC: G06F1/16 ,  H10K59/00

    CPC classification number: G06F1/1686 ,  G06F1/1688 ,  H10K59/00

    Abstract: A device includes: an array of light emitting elements extending in a first plane, each light emitting element being arranged to emit light; an array of pixel driver elements extending in a second plane beneath the array of pixels, in which each pixel driver element is configured to drive a corresponding light emitting element of the array of light emitting elements; a hole positioned within the array of light emitting elements and the array of pixel driver elements, in which the hole extends from the first plane through the second plane, a first multiple of light emitting elements from the array of light emitting elements in a first region adjacent the hole are arranged to provide a first resolution, and a second multiple of light emitting elements from the array of elements in a second region away from the hole are arranged to provide a second resolution.

    Image modification for under-display sensor
    17.
    发明授权
    Image modification for under-display sensor 有权

    公开(公告)号：US11881162B2

    公开(公告)日：2024-01-23

    申请号：US17995923

    申请日：2020-08-31

    Applicant: Google LLC

    Inventor： Sangmoo Choi ,  Xiaoping Bai ,  Chien-Hui Wen

    IPC: G09G3/3225 ,  G06V10/60 ,  H04N23/57

    CPC classification number: G09G3/3225 ,  G06V10/60 ,  H04N23/57 ,  G09G2320/0686 ,  G09G2354/00 ,  G09G2360/144

    Abstract: In general, techniques are described for image modification for under-display sensors. A computing device comprising a display, one or more sensors positioned underneath the display, and one or more processors may be configured to perform various aspects of the techniques. The display may be configured to allow the one or more sensors to operate through the display. The one or more processors may be configured to determine an ambient light level, and modify, based on the ambient light level, an area of an image to obtain a modified image. The area of the image may correspond to pixels of the display positioned above the one or more sensors or correspond to pixels of the display that are not positioned above the one or more sensors. The one or more processors may then interface, with the display, to output the modified image.

    Selective black level control in active matrix displays
    18.
    发明授权
    Selective black level control in active matrix displays 有权

    公开(公告)号：US11854457B2

    公开(公告)日：2023-12-26

    申请号：US17910641

    申请日：2021-07-30

    Applicant: Google LLC

    Inventor： Sangmoo Choi ,  Daniel Solomon

    IPC: G09G3/20 ,  G09G3/3225

    CPC classification number: G09G3/2074 ,  G09G3/3225 ,  G09G2300/08 ,  G09G2310/0202 ,  G09G2320/0233 ,  G09G2320/0242 ,  G09G2340/0435

    Abstract: A method includes: (a) receiving initial image frame data to display an image frame on a display panel, a luminance of each pixel of the display corresponding to a gray level; (b) identifying dark pixels at or below a first threshold gray level; (c) identifying pixels to be modified as a subset of the dark pixels neighbored by at least one bright pixel exceeding a second threshold gray level; (d) increasing by an incremental amount the gray level of the pixels to be modified, providing modified image frame data composed of: (i) the dark pixels that are neighbored by at least one bright pixel having gray levels that have been increased by the incremental gray level amount, and (ii) other pixels that have gray levels from the initial image frame data; and (e) displaying the image frame using the modified image frame data.

    POWER LINE DESIGN MODIFICATION TO MITIGATE VERTICAL BAND CROSSTALK
    19.
    发明公开
    POWER LINE DESIGN MODIFICATION TO MITIGATE VERTICAL BAND CROSSTALK 审中-公开

    公开(公告)号：US20230326409A1

    公开(公告)日：2023-10-12

    申请号：US17754830

    申请日：2021-02-02

    Applicant: Google LLC

    Inventor： Sangmoo Choi ,  Chang Kang ,  Jae Choi

    IPC: G09G3/3258

    CPC classification number: G09G3/3258 ,  G09G2300/08

    Abstract: Techniques to provide uniform luminance across a computing device display, such as an active matrix organic light emitting diode (AMOLED) display. In some examples, a computing device display may include a hole within the active area of the display that may be used for a camera, a button or some other function. The hole may result in a non-uniform voltage drop in a power supply mesh in regions of the active area near the hole. The power supply mesh may provide electrical energy to elements of the display. The techniques of this disclosure include portions of the power supply mesh that are not connected to the voltage supply bus to ensure a uniform voltage drop across the active area of the display.

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