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公开(公告)号：US20220366829A1
公开(公告)日：2022-11-17
申请号：US17774386
申请日：2019-12-05
Applicant: Google LLC
Inventor： Hyunchul Kim , Wonjae Choi , Sun-il Chang
IPC: G09G3/20
Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for dual color management for a multi-pixel density display. In one aspect, the method includes obtaining an image to be shown on a display, where the display includes both a first area that has a first pixel density and a second area that has a second pixel density that is less than the first pixel density, determining that a pixel with an initial value in the image will be displayed in the first area of the display (120), in response to determining that a pixel with the initial value in the image will be displayed in the first area of the display, determining a remapped value for the pixel in the image based on the initial value and a lookup table for the first area (130), and providing the remapped value for output on the display (150).
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公开(公告)号：US11948520B2
公开(公告)日：2024-04-02
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
CPC classification number: G09G3/3406 , G09G2320/0252 , G09G2320/064 , G09G2340/0435
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.
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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.
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公开(公告)号：US20220319382A1
公开(公告)日：2022-10-06
申请号：US17615992
申请日：2019-12-17
Applicant: Google LLC
Inventor： Hyunchul Kim , Sun-il Chang , Wonjae Choi , Sang Young Youn
Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for gamma lookup table compression. In one aspect, a method includes obtaining a gamma value for a pixel of an image to be shown on a display, determining a base gamma value based on a base lookup table that corresponds to a base display condition, determining a delta gamma value based on a delta lookup table that corresponds to a current display condition for the pixel, determining a remapped gamma value for the pixel based on a combination of the base gamma value and the delta gamma value, and providing the remapped gamma value to be shown on the display.
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公开(公告)号：US20220020323A1
公开(公告)日：2022-01-20
申请号：US17311632
申请日：2019-08-01
Applicant: GOOGLE LLC
Inventor： Sangmoo Choi , Wonjae Choi , Sang Young Youn , Sun-il Chang
IPC: G09G3/3225 , G09G3/20
Abstract: A method for driving an organic light emitting diode display having a first plurality of pixel lines having a first pixel density and a second plurality of pixel lines having a second pixel density higher than the first pixel density, the method including driving the first and second plurality of pixel lines with corresponding drive signals at a frame rate at which frames are displayed, where during each of the frames the drive signals have a pixel on time during which pixels in the pixel lines driven by the drive signals emit light and a pixel off time during which pixels in the pixel lines driven by the drive signals are dark, where the pixel on times and the pixel off times are varied between the drive signals to reduce variations in luminance.
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Patent Agency Ranking
公开(公告)号：US20210350771A1
公开(公告)日：2021-11-11
申请号：US17379371
申请日：2021-07-19
Applicant: Google LLC
Inventor： Wonjae Choi , Daniel Solomon , John Kaehler
Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for enabling a variable refresh rate on a display. One of the methods includes receiving, from a content presentation device, a first signal set to a first value; completing generation of first visual content; and after completing the generation of the first visual content, determining that the first signal is set to the first value and a second threshold duration of time has not expired; sending, to the content presentation device, the first visual content, wherein sending the first visual content causes the content presentation device to change the first signal from the first value to the second value; and after sending the first visual content, receiving, from the content presentation device, the first signal set to the second value.
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公开(公告)号：US11094296B2
公开(公告)日：2021-08-17
申请号：US16545663
申请日：2019-08-20
Applicant: Google LLC
Inventor： Wonjae Choi , Daniel Solomon , John Kaehler
Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for enabling a variable refresh rate on a display. One of the methods includes receiving, from a content presentation device, a first signal set to a first value; completing generation of first visual content; and after completing the generation of the first visual content, determining that the first signal is set to the first value and a second threshold duration of time has not expired; sending, to the content presentation device, the first visual content, wherein sending the first visual content causes the content presentation device to change the first signal from the first value to the second value; and after sending the first visual content, receiving, from the content presentation device, the first signal set to the second value.
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公开(公告)号：US11688352B2
公开(公告)日：2023-06-27
申请号：US16967192
申请日：2019-09-09
Applicant: Google LLC
Inventor： Sangmoo Choi , Wonjae Choi
IPC: G09G3/3291 , G09G3/3233 , G09G3/3266
CPC classification number: G09G3/3291 , G09G3/3233 , G09G3/3266 , G09G2310/027 , G09G2320/0209 , G09G2360/16
Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for displaying an image on a flat panel display with an array of pixels. A method includes receiving image data including a grayscale value for each pixel; determining a grayscale delta for each pixel where the grayscale delta is a variation between the grayscale value for a given pixel addressable by a first scan line and the grayscale value for another pixel addressable by a scan line addressed prior to the first scan line; determining an aggregated grayscale delta for the first scan line; comparing a magnitude of the aggregated grayscale delta to a threshold value corresponding to a data signal that results in line crosstalk; modifying the image data when the magnitude of the aggregated grayscale delta equals or exceeds the threshold value, and displaying the image on the flat panel display using the modified image data.
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公开(公告)号：US10952356B2
公开(公告)日：2021-03-16
申请号：US16788968
申请日：2020-02-12
Applicant: Google LLC
Inventor： Qi Qi , Wonjae Choi , Yi Tao
Abstract: Methods, systems, and apparatus, for shielding a bending portion of a flexible display that can be incorporated in electronic devices. One of the apparatus includes a cover glass element; a driver integrated circuit (D-IC); a mandrel portion; a shaft portion; a panel, positioned between the cover glass element and the D-IC, and comprising an inner panel layer that wraps around at least a portion of the mandrel portion to form a bending portion of the panel, the panel attached on either side on the shaft portion; and a shielding layer positioned around the inner panel layer and configured to inhibit electromagnetic signals through the bending portion.
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公开(公告)号：US10602645B2
公开(公告)日：2020-03-24
申请号：US16201029
申请日：2018-11-27
Applicant: Google LLC
Inventor： Qi Qi , Wonjae Choi , Yi Tao
Abstract: Methods, systems, and apparatus, for shielding a bending portion of a flexible display that can be incorporated in electronic devices. One of the apparatus includes a cover glass element; a driver integrated circuit (D-IC); a mandrel portion; a shaft portion; a panel, positioned between the cover glass element and the D-IC, and comprising an inner panel layer that wraps around at least a portion of the mandrel portion to form a bending portion of the panel, the panel attached on either side on the shaft portion; and a shielding layer positioned around the inner panel layer and configured to inhibit electromagnetic signals through the bending portion.
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