公开(公告)号：US11922870B2

公开(公告)日：2024-03-05

申请号：US18000909

申请日：2020-08-31

Applicant: Google LLC

Inventor： Sangmoo Choi ,  Yi Zhang

IPC: G09G3/3225 ,  G06V40/13

CPC classification number: G09G3/3225 ,  G06V40/1318 ,  G09G2360/145 ,  G09G2360/148

Abstract: An example method includes programming, based on image data of a frame of a plurality of frames and during a non-emission period of the frame, pixels of a plurality of pixels of a display of a computing device; causing pixels of the plurality of pixels to emit light during an emission period of the frame, wherein an amount of light emitted by the pixels during the emission period is based on the programming; and synchronizing operation of one or more sensors and operation of the plurality of pixels by at least causing the one or more sensors to emit, during a particular portion of the emission period of the frame, electromagnetic radiation through the display.

公开(公告)号：US11783750B2

公开(公告)日：2023-10-10

申请号：US17260871

申请日：2020-07-29

Applicant: Google LLC

Inventor： Sangmoo Choi ,  Janghoon Song ,  Taesung Kim

IPC: G09G3/20 ,  G09G3/3208

CPC classification number: G09G3/2007 ,  G09G3/3208 ,  G09G2320/0233 ,  G09G2320/0276 ,  G09G2320/0673 ,  G09G2320/0686

Abstract: A method for driving an organic light emitting diode (OLED) display having a first area with a first pixel density and a second area with a second pixel density higher than the first pixel density, the method includes receiving image content that specifies a grayscale value for both a first pixel in the first area and a second pixel in the second area, providing, based on the grayscale value, a first voltage to the first pixel in the first area, and providing, based on the grayscale value, a second voltage that is different from the first voltage to the second pixel in the second area, where the second voltage causes the second pixel to emit light less brightly than the first voltage causes the first pixel to emit light.

公开(公告)号：US11687126B2

公开(公告)日：2023-06-27

申请号：US17598738

申请日：2021-02-17

Applicant: Google LLC

Inventor： Sun-il Chang ,  Sangmoo Choi

IPC: G06F1/16 ,  H10K59/00 ,  H01L27/32

CPC classification number: G06F1/1686 ,  G06F1/1688 ,  H01L27/3225

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.

公开(公告)号：US20230122018A1

公开(公告)日：2023-04-20

申请号：US17905427

申请日：2020-11-25

Applicant: GOOGLE LLC

Inventor： Sangmoo Choi

IPC: G09G3/3208

Abstract: A display includes subpixel emissive areas of first, second, and third colors arranged in an array that includes rows and columns. The display also includes scan lines, column lines, and electronic subpixel circuits arranged in the array, with each subpixel circuit in a column of the array being electrically connected to a same column line and each electronic subpixel circuit configured for receiving electronic signals from a scan line and from a column line and for converting the received signals into a current signal provided to one of the subpixel emissive areas to drive light emission from the subpixel emissive area. The display further includes multiplexer (MUX) switches, where every other column line of the columns lines is configured to be connected to at least two outputs from a column line driver through the MUX switches.

公开(公告)号：US20230030201A1

公开(公告)日：2023-02-02

申请号：US17786961

申请日：2020-03-31

Applicant: GOOGLE LLC

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

IPC: G09G3/34

Abstract: PWM-frame rate misalignment is mitigated through implementation of a discrete variable refresh rate (VRR) scheme. A target frame rate is limited to a frame rate selected from only those frame rates that facilitate alignment of each frame period to a specified edge of a PWM cycle of a brightness control signal of a display panel. This alignment results in each frame period at the selected frame rate starting at a same point in a corresponding PWM cycle and ending at a same point in a corresponding PWM cycle to help ensure a constant effective duty cycle across each successive frame period, which in turn mitigates perception of flicker that otherwise would arise. Further, the discrete VRR scheme can employ a compensation mode for compensating for the delay in rendering or otherwise obtaining a frame for display so as to maintain a consistent duty cycle in the brightness control signal.

公开(公告)号：US20220392973A1

公开(公告)日：2022-12-08

申请号：US17760679

申请日：2020-12-08

Applicant: GOOGLE LLC

Inventor： Sangmoo Choi ,  Adrian Gheorghe Manea

IPC: H01L27/32

Abstract: A display panel includes: a display active area having multiple pixels; a bezel surrounding the display active area; a connector tab attached to the bezel at a first edge of the bezel; and a power line(s) formed from an opaque material, the power line(s) extending from the connector tab to a second edge of the bezel opposite the first edge, the power line(s) being configured to supply electrical power to the display active area, the power line(s) having a first width in a plane of the display along a side edge of the bezel between the first and second edges and, at a portion of the bezel at the second edge, a second width narrower than the first width or a gap in the power lines, the portion of the bezel at the second edge being substantially transparent.

公开(公告)号：US20220375385A1

公开(公告)日：2022-11-24

申请号：US17880223

申请日：2022-08-03

Applicant: Google LLC

Inventor： David Morris Hoffman ,  Sangmoo Choi ,  Sun-il Chang ,  Ion Bita

IPC: G09G3/20 ,  G09G3/3208

Abstract: A display panel includes a first set of pixels that each include a respective red sub-pixel and a respective green sub-pixel and a second set of pixels that each include a respective blue sub-pixel and a respective green sub-pixel, where the first set of pixels and the second set of pixels are arranged on the display panel such that at least one side of each of the pixels in the first set of pixels is adjacent to at least one of the pixels in the second set of pixels, at least one side of each of the pixels in the first set of pixels is not adjacent to any pixel, and the green sub-pixels are arranged on the display panel such that the green sub-pixels are evenly distributed in the display panel.

公开(公告)号：US11488533B2

公开(公告)日：2022-11-01

申请号：US17394953

申请日：2021-08-05

Applicant: Google LLC

Inventor： Sangmoo Choi

IPC: G09G3/3233

Abstract: This document describes systems and techniques for delaying anode voltage reset for quicker response times in organic light-emitting diode (OLED) displays. In an aspect, a pixel circuit includes a transistor electrically connected to an anode of an organic light-emitting diode and a reset voltage. Upon receiving an anode reset signal, the transistor completes the circuit causing the anode voltage to reset to the reset voltage in an anode voltage reset process. Delaying anode voltage reset can hasten response times in OLED displays.

公开(公告)号：US11482577B2

公开(公告)日：2022-10-25

申请号：US17119580

申请日：2020-12-11

Applicant: Google LLC

Inventor： David Morris Hoffman ,  Sangmoo Choi

IPC: H01L27/32

Abstract: An apparatus is described that includes a light emitting diode (LED) display and a sensor. The LED display includes pixel emissive areas that are each coupled by a corresponding conductive trace to a corresponding pixel circuit that drives the respective pixel emissive area. The LED display has a high density region, a low density region, and a transition region between the high density region and the low density region. A pattern of the pixel circuits in the transition region matches a pattern of pixel circuits in the low density region, with at least some conductive traces that couple pixel emissive areas to pixel circuits in the transition region being longer than corresponding conductive traces that couple pixel emissive areas to pixel circuits in the low density region. The sensor is arranged to receive electromagnetic radiation transmitted through the low density region of the LED display.

公开(公告)号：US20220309983A1

公开(公告)日：2022-09-29

申请号：US17260871

申请日：2020-07-29

Applicant: Google LLC

Inventor： Sangmoo Choi ,  Janghoon Song ,  Taesung Kim

IPC: G09G3/20 ,  G09G3/3208

Abstract: A method for driving an organic light emitting diode (OLED) display having a first area with a first pixel density and a second area with a second pixel density higher than the first pixel density, the method includes receiving image content that specifies a grayscale value for both a first pixel in the first area and a second pixel in the second area, providing, based on the grayscale value, a first voltage to the first pixel in the first area, and providing, based on the grayscale value, a second voltage that is different from the first voltage to the second pixel in the second area, where the second voltage causes the second pixel to emit light less brightly than the first voltage causes the first pixel to emit light.