Patents by Inventor Ziling Zhang

Ziling Zhang 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).

  • Publication number: 20220245415
    Abstract: A printing system is disclosed. The printing system includes at least one physical memory device to store ink model logic and one or more processors coupled with the at least one physical memory device to execute the ink model logic to generate first ink model parameter data for a first print medium based on first ink deposition data for a second print medium and first optical density measurement data for the first print medium.
    Type: Application
    Filed: February 2, 2021
    Publication date: August 4, 2022
    Applicant: Ricoh Company, Ltd.
    Inventors: Mikel Stanich, Nikita Gurudath, Pallavi Premkumar, Ziling Zhang, Burke Larsen
  • Patent number: 11368592
    Abstract: A printing system is disclosed. The printing system includes at least one physical memory device to store calibration logic and one or more processors coupled with the at least one physical memory device to execute the calibration logic to generate a uniformity compensated transfer function for each of a plurality of pel forming elements, generate a missing neighbor corrected transfer function for each of the pel forming elements, generate a missing neighbor transfer function based on the uniformity compensated transfer functions and the missing neighbor corrected transfer function and compute an average of the missing neighbor transfer functions to generate an average missing neighbor transfer function.
    Type: Grant
    Filed: March 5, 2021
    Date of Patent: June 21, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Walter .F Kailey, Nikita Gurudath, Mikel Stanich, William Manchester, Ziling Zhang
  • Patent number: 11338591
    Abstract: A printing system is disclosed. The printing system includes at least one physical memory device to store nozzle correction logic and one or more processors coupled with at least one physical memory device to execute the nozzle correction logic to receive a uniformity compensated transfer function for each of a plurality of pel forming elements, receive an average missing neighbor transfer function, receive a defective nozzles list including one or more of the plurality of pel forming elements indicated as defective during print production; and perform missing neighbor processing by applying the average missing neighbor transfer function associated with the pel forming element determined to be a neighbor of a defective pel forming element.
    Type: Grant
    Filed: March 5, 2021
    Date of Patent: May 24, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Walter .F Kailey, Nikita Gurudath, Mikel Stanich, William Manchester, Ziling Zhang
  • Patent number: 11310379
    Abstract: Systems and methods are provided for reviewing printed jobs. On embodiment is a system comprising a print review device. The print review device includes a memory that stores an image of a test pattern printed by printheads of a printer, and a controller that generates a Graphical User Interface (GUI), for presentation at a display, depicting states of the printheads based on the image, receives input from a user selecting one of the printheads, correlates the printhead with a portion of the image, and presents the portion of the image for review at the GUI. The controller also identifies locations on the portion that are correlated with nozzles of the printhead, and selectively highlights the locations based on state information for the nozzles.
    Type: Grant
    Filed: March 8, 2021
    Date of Patent: April 19, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Nathan Young, Ziling Zhang, Kara Larsen, Scott R. Johnson
  • Patent number: 11283936
    Abstract: A system is disclosed. The system at least one physical memory device to store ink estimation logic and one or more processors coupled with the at least one physical memory device, to execute the ink estimation logic to receive a histogram for each of a plurality of color planes, receive uncalibrated drop fraction data for each of a plurality of drop sizes in a printing system, perform a direct drop fraction conversion of the uncalibrated drop fraction data to generate calibrated drop fraction data for each of the plurality of drop sizes by applying a first transfer function to the uncalibrated drop fraction data and generate estimated ink usage data for each of the plurality of drop sizes based on the histograms and the calibrated drop fraction data.
    Type: Grant
    Filed: December 18, 2020
    Date of Patent: March 22, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Mikel Stanich, Nikita Gurudath, Pallavi Premkumar, Ziling Zhang
  • Patent number: 11157786
    Abstract: A printing system is disclosed. The printing system includes at least one physical memory device to store uniformity compensation logic and one or more processors coupled with the at least one physical memory device to execute the uniformity compensation logic to receive print image measurement data corresponding with each of a plurality of pel forming elements, generate a first set of intermediate images based on the print image measurement data, determine whether historical sets of intermediate images are available, generate first transfer functions corresponding to each of the pel forming elements based on the first set of intermediate images and the historical sets of intermediate images upon a determination that the historical sets of intermediate images are available and transmit the first transfer functions for each of the pel forming elements.
    Type: Grant
    Filed: November 19, 2020
    Date of Patent: October 26, 2021
    Assignee: Ricoh Company, Ltd.
    Inventors: Nikita Gurudath, Ziling Zhang, Scott Johnson, Nathan Young
  • Publication number: 20210183036
    Abstract: Systems and methods are provided for. One embodiment is a system that includes an interface configured to receive an image of media printed on with print data, and memory configured to store defect reference data of nozzles belonging to printheads of a printer. The system also includes a print defect controller configured to detect a nozzle defect in the image based on a comparison of the image with the print data, and to determine a type of the nozzle defect based on a comparison of the nozzle defect with the defect reference data.
    Type: Application
    Filed: December 12, 2019
    Publication date: June 17, 2021
    Applicant: Ricoh Company, Ltd.
    Inventors: Nikita Gurudath, Scott R. Johnson, Nathan Young, Ziling Zhang