公开(公告)号：US20220270547A1

公开(公告)日：2022-08-25

申请号：US17593414

申请日：2020-08-21

Applicant: GOOGLE LLC

Inventor： Ken Kok Foo ,  John William Kaehler ,  Chien-Hui Wen

IPC: G09G3/3208

Abstract: A non-transitory computer-readable storage medium can include instructions stored thereon that, when executed by at least one processor, are configured to cause a computing device to determine, in response to a change in a refresh rate of a display, an encoded intensity of at least a portion of an image presented by the display, determine that the encoded intensity is within a predetermined range, and based on determining that the encoded intensity is within the predetermined range, adjust an intensity of a signal for the portion of the image.

公开(公告)号：US12217722B2

公开(公告)日：2025-02-04

申请号：US18435708

申请日：2024-02-07

Applicant: Google LLC

Inventor： Hyunchul Kim ,  Chien-Hui Wen ,  Ken Kok Foo

IPC: G09G3/36 ,  G09G5/02

Abstract: Techniques and apparatuses are described that perform frequency compensation for a display. In aspects, a first uniformity of multiple regions of the display can be measured at a reference frequency. The display can then be driven at a second frequency and a second uniformity of the multiple regions of the display can be measured. The differences between the first and second uniformity can then be used to generate a compensation mask. XYZ domain data from the first and second uniformity measurements can be used to generate a color model characterization. The color model characterization can be used to convert the XYZ domain data into RGB data when the display is driven at the second frequency to compensate for the differences in uniformity across the multiple regions of the display.

公开(公告)号：US11972723B2

公开(公告)日：2024-04-30

申请号：US17593414

申请日：2020-08-21

Applicant: GOOGLE LLC

Inventor： Ken Kok Foo ,  John William Kaehler ,  Chien-Hui Wen

IPC: G09G3/3208

CPC classification number: G09G3/3208 ,  G09G2320/0247 ,  G09G2320/0626 ,  G09G2340/0435

Abstract: A non-transitory computer-readable storage medium can include instructions stored thereon that, when executed by at least one processor, are configured to cause a computing device to determine, in response to a change in a refresh rate of a display, an encoded intensity of at least a portion of an image presented by the display, determine that the encoded intensity is within a predetermined range, and based on determining that the encoded intensity is within the predetermined range, adjust an intensity of a signal for the portion of the image.

公开(公告)号：US20240177687A1

公开(公告)日：2024-05-30

申请号：US18435708

申请日：2024-02-07

Applicant: Google LLC

Inventor： Hyunchul Kim ,  Chien-Hui Wen ,  Ken Kok Foo

IPC: G09G5/02

CPC classification number: G09G5/02 ,  G09G2320/0233

Abstract: Techniques and apparatuses are described that perform frequency compensation for a display. In aspects, a first uniformity of multiple regions of the display can be measured at a reference frequency. The display can then be driven at a second frequency and a second uniformity of the multiple regions of the display can be measured. The differences between the first and second uniformity can then be used to generate a compensation mask. XYZ domain data from the first and second uniformity measurements can be used to generate a color model characterization. The color model characterization can be used to convert the XYZ domain data into RGB data when the display is driven at the second frequency to compensate for the differences in uniformity across the multiple regions of the display.

公开(公告)号：US20230274678A1

公开(公告)日：2023-08-31

申请号：US17998227

申请日：2021-05-25

Applicant: Google LLC

Inventor： Chien-Hui Wen ,  Hsin-Yu Chen ,  Ken Kok Foo ,  John William Kaehler

IPC: G09G3/20

CPC classification number: G09G3/20 ,  G09G2340/0435 ,  G09G2320/0626 ,  G09G2320/0673 ,  G09G2360/16 ,  G09G2320/0247

Abstract: A method may include measuring, from a device having a display panel configured to operate at a first refresh rate or a second refresh rate, a difference in luminance of the display panel between the first refresh rate and the second refresh rate for an input gray level. The method may also include applying, based on the measured difference in luminance, a value offset to a default gamma value used by the device for the input gray level when the display panel is operating at the second refresh rate, thereby generating a new gamma value. The method may further include storing, at the device, the new gamma value, where subsequent to the storing, the device is configured to override the default gamma value for the input gray level with the new gamma value when the display panel is operating at the second refresh rate.

公开(公告)号：US20250087148A1

公开(公告)日：2025-03-13

申请号：US18286028

申请日：2022-12-22

Applicant: Google LLC

Inventor： Chien-Hui Wen ,  Daniel Solomon ,  Ken Kok Foo

IPC: G09G3/3233

Abstract: In general, the subject matter described in this disclosure can be embodied in methods, systems, and program products for presenting display content on a display of a computing system. A method includes selecting, from a collection of luminance profiles (308) that are each configured to reduce brightness of the display content in different manners, a first luminance profile based on the current display brightness setting (320), the first luminance profile specifying a first amount of brightness reduction to a peripheral portion of the display content and a first gradient of brightness reduction for a portion of the display content between the peripheral portion of the display content and a center portion of the display content; applying the first luminance profile to the display content to modify the display content by reducing a brightness of the display content according to the first luminance profile; and presenting the display content on the display.

公开(公告)号：US12230199B2

公开(公告)日：2025-02-18

申请号：US18620973

申请日：2024-03-28

Applicant: Google LLC

Inventor： Ken Kok Foo ,  John William Kaehler ,  Chien-Hui Wen

IPC: G09G3/3208

Abstract: A non-transitory computer-readable storage medium can include instructions stored thereon that, when executed by at least one processor, are configured to cause a computing device to determine, in response to a change in a refresh rate of a display, an encoded intensity of at least a portion of an image presented by the display, determine that the encoded intensity is within a predetermined range, and based on determining that the encoded intensity is within the predetermined range, adjust an intensity of a signal for the portion of the image.

公开(公告)号：US20250046241A1

公开(公告)日：2025-02-06

申请号：US18780154

申请日：2024-07-22

Applicant: Google LLC

Inventor： Hyunchul Kim ,  Chien-Hui Wen ,  Ken Kok Foo

IPC: G09G3/3208 ,  G06T7/11 ,  G06T7/136

Abstract: This document describes systems and techniques directed at zonal attenuation compensation. In aspects, a system includes a graphics processing unit configured to provide image data to a display panel. A zonal attenuation module is configured to combine a zonal attenuation mask with the image data to generate masked image data, the masked image data having a reduced brightness for portions of data corresponding to one or more regions on the display panel based on the zonal attenuation mask. An inverse zonal attenuation module is configured to apply an inverse zonal attenuation mask to the masked image data to reduce a brightness for additional portions of data corresponding to one or more additional regions on the display panel effective to offset increased brightness in the one or more additional regions on the display panel.

公开(公告)号：US12183235B2

公开(公告)日：2024-12-31

申请号：US17998227

申请日：2021-05-25

Applicant: Google LLC

Inventor： Chien-Hui Wen ,  Hsin-Yu Chen ,  Ken Kok Foo ,  John William Kaehler

IPC: G09G3/20

Abstract: A method may include measuring, from a device having a display panel configured to operate at a first refresh rate or a second refresh rate, a difference in luminance of the display panel between the first refresh rate and the second refresh rate for an input gray level. The method may also include applying, based on the measured difference in luminance, a value offset to a default gamma value used by the device for the input gray level when the display panel is operating at the second refresh rate, thereby generating a new gamma value. The method may further include storing, at the device, the new gamma value, where subsequent to the storing, the device is configured to override the default gamma value for the input gray level with the new gamma value when the display panel is operating at the second refresh rate.

公开(公告)号：US12272306B2

公开(公告)日：2025-04-08

申请号：US18286028

申请日：2022-12-22

Applicant: Google LLC

Inventor： Chien-Hui Wen ,  Daniel Solomon ,  Ken Kok Foo

IPC: G09G3/3233

Abstract: In general, the subject matter described in this disclosure can be embodied in methods, systems, and program products for presenting display content on a display of a computing system. A method includes selecting, from a collection of luminance profiles that are each configured to reduce brightness of the display content in different manners, a first luminance profile based on the current display brightness setting, the first luminance profile specifying a first amount of brightness reduction to a peripheral portion of the display content and a first gradient of brightness reduction for a portion of the display content between the peripheral portion of the display content and a center portion of the display content; applying the first luminance profile to the display content to modify the display content by reducing a brightness of the display content according to the first luminance profile; and presenting the display content on the display.