Patents by Inventor Yuanbao Gu

Yuanbao Gu 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).

  • CALIBRATION IN MULTIPLE SLOPE COLUMN PARALLEL ANALOG-TO-DIGITAL CONVERSION FOR IMAGE SENSORS
    Publication number: 20150103220
    Abstract: An apparatus includes analog-to-digital (A/D) conversion circuitry coupled to a pixel array. The A/D conversion circuitry includes a voltage ramp generator and a set of column A/D conversion circuits. The voltage ramp generator generates a single slope voltage ramp in a first state and a multiple slope voltage ramp in a second state. The set of column A/D conversion circuits is coupled with the voltage ramp generator. The apparatus further includes calibration circuitry coupled with the set of column A/D conversion circuits and operable to determine digital calibration data to adjust digital image data. The calibration circuitry provides analog calibration data that spans a calibration range to the set of column A/D conversion circuits instead of the analog image data from the pixel array being provided to the set of column A/D conversion circuits.
    Type: Application
    Filed: December 17, 2014
    Publication date: April 16, 2015
    Inventors: Zheng Yang, Guangbin Zhang, Yuanbao Gu
  • Calibration in multiple slope column parallel analog-to-digital conversion for image sensors
    Patent number: 8994832
    Abstract: An apparatus includes analog-to-digital (A/D) conversion circuitry coupled to a pixel array. The A/D conversion circuitry includes a voltage ramp generator and a set of column A/D conversion circuits. The voltage ramp generator generates a single slope voltage ramp in a first state and a multiple slope voltage ramp in a second state. The set of column A/D conversion circuits is coupled with the voltage ramp generator. The apparatus further includes calibration circuitry coupled with the set of column A/D conversion circuits and operable to determine digital calibration data to adjust digital image data. The calibration circuitry provides analog calibration data that spans a calibration range to the set of column A/D conversion circuits instead of the analog image data from the pixel array being provided to the set of column A/D conversion circuits.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: March 31, 2015
    Assignee: OmniVision Technologies, Inc.
    Inventors: Zheng Yang, Guangbin Zhang, Yuanbao Gu
  • Calibration in multiple slope column parallel analog-to-digital conversion for image sensors
    Patent number: 8941527
    Abstract: A method of an aspect includes acquiring analog image data with a pixel array, and reading out the analog image data from the pixel array. The analog image data is converted to digital image data by performing an analog-to-digital (A/D) conversion using a multiple slope voltage ramp. At least some of the digital image data is adjusted with calibration data. Other methods, apparatus, and systems, are also disclosed.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: January 27, 2015
    Assignee: OmniVision Technologies, Inc.
    Inventors: Zheng Yang, Guangbin Zhang, Yuanbao Gu
  • CALIBRATION IN MULTIPLE SLOPE COLUMN PARALLEL ANALOG-TO-DIGITAL CONVERSION FOR IMAGE SENSORS
    Publication number: 20140226050
    Abstract: A method of an aspect includes acquiring analog image data with a pixel array, and reading out the analog image data from the pixel array. The analog image data is converted to digital image data by performing an analog-to-digital (A/D) conversion using a multiple slope voltage ramp. At least some of the digital image data is adjusted with calibration data. Other methods, apparatus, and systems, are also disclosed.
    Type: Application
    Filed: April 21, 2014
    Publication date: August 14, 2014
    Inventors: Zheng Yang, Guangbin Zhang, Yuanbao Gu
  • Calibration in multiple slope column parallel analog-to-digital conversion for image sensors
    Patent number: 8730081
    Abstract: A method of an aspect includes acquiring analog image data with a pixel array, and reading out the analog image data from the pixel array. The analog image data is converted to digital image data by performing an analog-to-digital (A/D) conversion using a multiple slope voltage ramp. At least some of the digital image data is adjusted with calibration data. Other methods, apparatus, and systems, are also disclosed.
    Type: Grant
    Filed: March 19, 2012
    Date of Patent: May 20, 2014
    Assignee: OmniVision Technologies, Inc.
    Inventors: Zheng Yang, Guangbin Zhang, Yuanbao Gu
  • CALIBRATION IN MULTIPLE SLOPE COLUMN PARALLEL ANALOG-TO-DIGITAL CONVERSION FOR IMAGE SENSORS
    Publication number: 20130242125
    Abstract: A method of an aspect includes acquiring analog image data with a pixel array, and reading out the analog image data from the pixel array. The analog image data is converted to digital image data by performing an analog-to-digital (A/D) conversion using a multiple slope voltage ramp. At least some of the digital image data is adjusted with calibration data. Other methods, apparatus, and systems, are also disclosed.
    Type: Application
    Filed: March 19, 2012
    Publication date: September 19, 2013
    Inventors: Zheng Yang, Guangbin Zhang, Yuanbao Gu