Patents by Inventor Tyvis Cheung

Tyvis Cheung has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 12205534
    Abstract: Certain display types—such as organic light emitting diode (OLED) displays—may be more prone to burn-in or ghosting due to the varied luminance degradation rates of pixel cells of the display—especially in applications or content types that require display of prolonged, continuous, static textures. To account for this, aging of pixel cells (e.g., R, G, B, and/or W pixel cells) of a display may be tracked such that more aged pixel cells may be compensated for by reducing pixel values of one or more (e.g., each) other pixel cells of the display. As a result, the effect of burn-in or ghosting may be mitigated by tracking luminance degradation over time and compensating for the luminance degradation across some or all of the pixel cells of the display.
    Type: Grant
    Filed: January 13, 2021
    Date of Patent: January 21, 2025
    Assignee: NVIDIA Corporation
    Inventors: Yanbo Sun, Tyvis Cheung, Gerrit Slavenburg
  • Publication number: 20220223104
    Abstract: Certain display types—such as organic light emitting diode (OLED) displays—may be more prone to burn-in or ghosting due to the varied luminance degradation rates of pixel cells of the display—especially in applications or content types that require display of prolonged, continuous, static textures. To account for this, aging of pixel cells (e.g., R, G, B, and/or W pixel cells) of a display may be tracked such that more aged pixel cells may be compensated for by reducing pixel values of one or more (e.g., each) other pixel cells of the display. As a result, the effect of burn-in or ghosting may be mitigated by tracking luminance degradation over time and compensating for the luminance degradation across some or all of the pixel cells of the display.
    Type: Application
    Filed: January 13, 2021
    Publication date: July 14, 2022
    Inventors: Yanbo Sun, Tyvis Cheung, Gerrit Slavenburg
  • Patent number: 10880531
    Abstract: The disclosure is directed to transforming signals from one signal format to another signal format. For example, the format of a digital signal can change from storing video information in 12 bits of data to storing the video information in 32 bits of data. Other storage values and combinations can also be used. Since the number of bits available to store a portion of the video information can change when changing formats, a process is needed to translate or transform the video information appropriately. A transfer function utilizing a lookup table is used for the transforming. The lookup table utilizes a variable step size segmentation scheme that decreases the amount of lookup table storage space required and also decreases the number of estimation errors, i.e., interpolation errors. Estimation errors can occur when looking up a value not stored in the lookup table, and using neighboring values that are stored to estimate the value requested.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: December 29, 2020
    Assignee: Nvidia Corporation
    Inventors: Yanbo Sun, Tyvis Cheung, Gennady Petrov
  • Publication number: 20190238816
    Abstract: The disclosure is directed to transforming signals from one signal format to another signal format. For example, the format of a digital signal can change from storing video information in 12 bits of data to storing the video information in 32 bits of data. Other storage values and combinations can also be used. Since the number of bits available to store a portion of the video information can change when changing formats, a process is needed to translate or transform the video information appropriately. A transfer function utilizing a lookup table is used for the transforming. The lookup table utilizes a variable step size segmentation scheme that decreases the amount of lookup table storage space required and also decreases the number of estimation errors, i.e., interpolation errors. Estimation errors can occur when looking up a value not stored in the lookup table, and using neighboring values that are stored to estimate the value requested.
    Type: Application
    Filed: August 17, 2018
    Publication date: August 1, 2019
    Inventors: Yanbo Sun, Tyvis Cheung, Gennady Petrov
  • Patent number: 10062142
    Abstract: Data transfer techniques include transferring display surface data from a memory subsystem into a stutter buffer at a first rate until the stutter buffer is substantially full. The memory interface and/or memory of the memory subsystem may then be placed into a suspend state until the stutter buffer is substantially empty. The display surface data is transferred from the stutter buffer to display logic at a second rate even when the memory subsystem is in a suspend state. The second rate, which is typically the rendering rate of the display, is substantially slower than the rate at which data is transferred into the stutter buffer.
    Type: Grant
    Filed: December 31, 2012
    Date of Patent: August 28, 2018
    Assignee: NVIDIA CORPORATION
    Inventors: Rupesh Shah, Tyvis Cheung, Thomas Edward Dewey, Chris Cheng, Franciscus Sijstermans