Patents by Inventor Mohammad Tofighi

Mohammad Tofighi 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).

  • Using content type to select brightness in direct-lit backlight units
    Patent number: 11967291
    Abstract: A display may have a pixel array such as a liquid crystal pixel array. The pixel array may be illuminated by a backlight unit that includes an array of light-emitting diodes (LEDs). The backlight unit may determine the type of content in the image data. The backlight unit may decide to prioritize either mitigating halo or mitigating clipping based on the type of content. The determination of the type of content in the image data may be used to determine the brightness values for the LEDs in the LED array. If the content is determined to be a first type of content, at least one given LED in the LED array may have a different brightness value than if the content is determined to be a second, different type of content. Classifying content in the image data may be useful in optimizing visible artifacts such as visible halo and clipping.
    Type: Grant
    Filed: June 2, 2023
    Date of Patent: April 23, 2024
    Assignee: Apple Inc.
    Inventors: Mohammad Tofighi, Meng Cao, Pierre-Yves Emelie, Duane M Petrovich, Shuo Han, Zhendong Hong, Tobias Jung, Marc Albrecht, Jiulong Shan, Wei H Yao
  • HDR image generation from single-shot HDR color image sensors
    Patent number: 11922639
    Abstract: A method for generating an high-dynamic-range (HDR) color image from a dual-exposure-time single-shot HDR color image sensor includes obtaining pixel values generated by a local region of sensor pixels of the image sensor, determining a motion parameter for the local region from pixel values associated with a first color, and demosaicing the pixel values of the local region to determine, for each of three colors, an output value of the images pixel, wherein relative contributions of short-exposure-time pixels and long-exposure-time pixels to the output value are weighted according to the motion parameter.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: March 5, 2024
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Yuelong Li, Jon Scott McElvain, Mohammad Tofighi
  • HDR IMAGE GENERATION FROM SINGLE-SHOT HDR COLOR IMAGE SENSORS
    Publication number: 20210248758
    Abstract: A method for generating an high-dynamic-range (HDR) color image from a dual-exposure-time single-shot HDR color image sensor includes obtaining pixel values generated by a local region of sensor pixels of the image sensor, determining a motion parameter for the local region from pixel values associated with a first color, and demosaicing the pixel values of the local region to determine, for each of three colors, an output value of the images pixel, wherein relative contributions of short-exposure-time pixels and long-exposure-time pixels to the output value are weighted according to the motion parameter.
    Type: Application
    Filed: June 4, 2019
    Publication date: August 12, 2021
    Applicant: Dolby Laboratories Licensing Corporation
    Inventors: Yuelong Li, Jon Scott McElvain, Mohammad Tofighi