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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：US20220301518A1
公开(公告)日：2022-09-22
申请号：US17207443
申请日：2021-03-19
Applicant: Google LLC
Inventor： Hyunchul Kim , Sang Young Youn
Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for three sub-color correction based on two-dimensional graphs. In an aspect, a method includes obtaining an image to be shown on a display, determining three sub-color values of a particular pixel in the image, including a first sub-color value for a first sub-color, a second sub-color value for a second sub-color, and a third sub-color value for a third sub-color of the particular pixel, obtaining a representation of a two-dimensional graph of color-correction curves, selecting a selected color-correction curve to use to correct the first sub-color value based on both the second sub-color value and the third sub-color value, determining a corrected first sub-color value based on the first sub-color value, and outputting the image using the corrected first sub-color value instead of the first sub-color value.
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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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公开(公告)号：US12148382B2
公开(公告)日：2024-11-19
申请号：US18275822
申请日：2021-03-30
Applicant: Google LLC
Inventor： Sangmoo Choi , Sang Young Youn
IPC: G09G3/3258 , G09G3/3233
Abstract: A first image is rendered on an active area of an OLED display panel with a first refresh rate that is below a threshold refresh rate and, subsequent to rendering the first image with the first refresh rate, a second image that is different from the first image is rendered on the active area, where the rendering of the second image includes rendering a number of initial frames of the second image at a second refresh rate that is at or above the threshold refresh rate. After rendering the number of initial frames of the second image at the second refresh rate, additional frames of the second image on the active area are rendered with the first refresh rate, where the number of initial frames is greater than 1.
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Patent Agency Ranking
公开(公告)号：US12020411B2
公开(公告)日：2024-06-25
申请号：US17051822
申请日：2019-12-04
Applicant: Google LLC
Inventor： Hyunchul Kim , Wonjae Choi , Sang Young Youn , Sun-il Chang
CPC classification number: G06T5/92 , G06T2207/20208
Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for remapping for mixed dynamic range content. In one aspect, a method for remapping for mixed dynamic range content, the method includes obtaining an image to be displayed that includes both first dynamic range content and second dynamic range content, determining that the image includes first dynamic range content at a first pixel, determining a first remapped value for the first pixel based on a lookup table for first dynamic range content and an initial value for the first pixel, providing the first remapped value for the first pixel for display, determining that the image includes second dynamic range content at a second pixel, determining a second remapped value for the second pixel based on a second initial value for the second pixel, and providing the second remapped value for the second pixel for display.
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公开(公告)号：US11955076B2
公开(公告)日：2024-04-09
申请号：US17756319
申请日：2020-07-10
Applicant: Google LLC
Inventor： Ji Hoon Lee , Sun-il Chang , Sang Young Youn
IPC: G09G3/3233 , G09G3/3258
CPC classification number: G09G3/3233 , G09G3/3258 , G09G2330/021
Abstract: An example method includes estimating, based on content to be displayed at a display of a mobile computing device at a future time, an amount of power to be used by the display at the future time; selecting, based on the estimated power level, a power converter of a plurality of power converters of the mobile computing device, each of the plurality of power converters optimized for a different output power range; and causing electrical power from the selected power converter to be supplied to the display at the future time.
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公开(公告)号：US11908416B2
公开(公告)日：2024-02-20
申请号：US17920719
申请日：2021-05-10
Applicant: Google LLC
Inventor： Chien-Hui Wen , Sang Young Youn
IPC: G09G3/3258 , G09G3/34
CPC classification number: G09G3/3258 , G09G3/3406 , G09G2360/144
Abstract: A method, includes: (i) receiving information about an ambient light level; (ii) receiving image frame data for an active matrix display panel with an array of pixels each having a light emitting diode (LED) and a pixel circuit to control current supplied to the LED; (iii) selecting a selected current-resistance compensation (IRC) setting based on the information about the ambient light value; (iv) selecting a selected source voltage level based on the selected IRC setting that was selected by the computing system; (v) generating compensated image frame data for the image frame based on the received image frame data and the selected IRC setting; and (vi) displaying the image frame by supplying data signals based on the compensated image frame data to corresponding pixels from the array of pixels, while applying a source voltage corresponding to the selected source voltage level to all of the pixels.
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公开(公告)号：US20230177728A1
公开(公告)日：2023-06-08
申请号：US17997109
申请日：2020-08-25
Applicant: Google LLC
Inventor： Hyunchul Kim , Sang Young Youn
IPC: G06T7/90 , G06T1/20 , G06T1/60 , G06F3/14 , G09G3/3208
CPC classification number: G06T7/90 , G06F3/14 , G06T1/20 , G06T1/60 , G09G3/3208
Abstract: An example method includes obtaining a particular input color sample of a current line of samples rendered by a graphical processing unit (GPU) of the device; maintaining a cache that includes entries mapping input color samples to output interpolated color samples; determining whether the cache includes an entry corresponding to the particular input color sample; responsive to determining that the cache includes an entry corresponding to the particular input color sample, outputting, by the processing circuitry, a particular output interpolated color sample included in the entry corresponding to the particular input color sample without performing interpolation on the particular input color sample; and displaying, at a display of the device, a representation of the particular output interpolated color sample.
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公开(公告)号：US11640811B2
公开(公告)日：2023-05-02
申请号：US17207443
申请日：2021-03-19
Applicant: Google LLC
Inventor： Hyunchul Kim , Sang Young Youn
Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for three sub-color correction based on two-dimensional graphs. In an aspect, a method includes obtaining an image to be shown on a display, determining three sub-color values of a particular pixel in the image, including a first sub-color value for a first sub-color, a second sub-color value for a second sub-color, and a third sub-color value for a third sub-color of the particular pixel, obtaining a representation of a two-dimensional graph of color-correction curves, selecting a selected color-correction curve to use to correct the first sub-color value based on both the second sub-color value and the third sub-color value, determining a corrected first sub-color value based on the first sub-color value, and outputting the image using the corrected first sub-color value instead of the first sub-color value.
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