Patents by Inventor Rangarajan Krishnan

Rangarajan Krishnan 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: 11842005
    Abstract: In some examples, a touch screen includes resistors between the touch electrodes and routing traces. In some examples, the resistors can include a transparent conductive material included in the touch electrodes of the touch screen. The resistors can be located in a border region of the touch screen that can surround an active area of the touch screen that can include the touch electrodes and display pixels of the touch screen, for example. In some examples, the resistors included in the touch screen can have different resistances from each other and the same outer dimensions as one another. The resistors can reduce the variation in resistance from channel to channel in the touch screen, which can improve touch screen performance, for example.
    Type: Grant
    Filed: February 13, 2023
    Date of Patent: December 12, 2023
    Assignee: Apple Inc.
    Inventors: Zhou Lu, Isaac Wing-Tak Chan, Justin Zachary Wu, Rangarajan Krishnan, Qingbo Guo, Chao Zhang
  • Publication number: 20230195254
    Abstract: In some examples, a touch screen includes resistors between the touch electrodes and routing traces. In some examples, the resistors can include a transparent conductive material included in the touch electrodes of the touch screen. The resistors can be located in a border region of the touch screen that can surround an active area of the touch screen that can include the touch electrodes and display pixels of the touch screen, for example. In some examples, the resistors included in the touch screen can have different resistances from each other and the same outer dimensions as one another. The resistors can reduce the variation in resistance from channel to channel in the touch screen, which can improve touch screen performance, for example.
    Type: Application
    Filed: February 13, 2023
    Publication date: June 22, 2023
    Inventors: Zhou LU, Isaac Wing-Tak CHAN, Justin Zachary WU, Rangarajan KRISHNAN, Qingbo GUO, Chao ZHANG
  • Patent number: 11592929
    Abstract: In some examples, a touch screen includes resistors between the touch electrodes and routing traces. In some examples, the resistors can include a transparent conductive material included in the touch electrodes of the touch screen. The resistors can be located in a border region of the touch screen that can surround an active area of the touch screen that can include the touch electrodes and display pixels of the touch screen, for example. In some examples, the resistors included in the touch screen can have different resistances from each other and the same outer dimensions as one another. The resistors can reduce the variation in resistance from channel to channel in the touch screen, which can improve touch screen performance, for example.
    Type: Grant
    Filed: January 24, 2022
    Date of Patent: February 28, 2023
    Assignee: Apple Inc.
    Inventors: Zhou Lu, Isaac Wing-Tak Chan, Justin Zachary Wu, Rangarajan Krishnan, Qingbo Guo, Chao Zhang
  • Publication number: 20220147217
    Abstract: In some examples, a touch screen includes resistors between the touch electrodes and routing traces. In some examples, the resistors can include a transparent conductive material included in the touch electrodes of the touch screen. The resistors can be located in a border region of the touch screen that can surround an active area of the touch screen that can include the touch electrodes and display pixels of the touch screen, for example. In some examples, the resistors included in the touch screen can have different resistances from each other and the same outer dimensions as one another. The resistors can reduce the variation in resistance from channel to channel in the touch screen, which can improve touch screen performance, for example.
    Type: Application
    Filed: January 24, 2022
    Publication date: May 12, 2022
    Inventors: Zhou LU, Isaac Wing-Tak CHAN, Justin Zachary WU, Rangarajan KRISHNAN, Qingbo GUO, Chao ZHANG
  • Publication number: 20220050571
    Abstract: In some examples, a touch screen includes resistors between the touch electrodes and routing traces. In some examples, the resistors can include a transparent conductive material included in the touch electrodes of the touch screen. The resistors can be located in a border region of the touch screen that can surround an active area of the touch screen that can include the touch electrodes and display pixels of the touch screen, for example. In some examples, the resistors included in the touch screen can have different resistances from each other and the same outer dimensions as one another. The resistors can reduce the variation in resistance from channel to channel in the touch screen, which can improve touch screen performance, for example.
    Type: Application
    Filed: August 14, 2020
    Publication date: February 17, 2022
    Inventors: Zhou LU, Isaac Wing-Tak CHAN, Justin Zachary WU, Rangarajan KRISHNAN, Qingbo GUO, Chao ZHANG
  • Patent number: 11231807
    Abstract: In some examples, a touch screen includes resistors between the touch electrodes and routing traces. In some examples, the resistors can include a transparent conductive material included in the touch electrodes of the touch screen. The resistors can be located in a border region of the touch screen that can surround an active area of the touch screen that can include the touch electrodes and display pixels of the touch screen, for example. In some examples, the resistors included in the touch screen can have different resistances from each other and the same outer dimensions as one another. The resistors can reduce the variation in resistance from channel to channel in the touch screen, which can improve touch screen performance, for example.
    Type: Grant
    Filed: August 14, 2020
    Date of Patent: January 25, 2022
    Assignee: Apple Inc.
    Inventors: Zhou Lu, Isaac Wing-Tak Chan, Justin Zachary Wu, Rangarajan Krishnan, Qingbo Guo, Chao Zhang
  • Publication number: 20130118585
    Abstract: Embodiments of the invention are to a copper indium diselenide (CIS) comprising nanoparticle where the nanoparticle includes a CIS phase and a second phase comprising a copper selenide. The CIS comprising nanoparticles are free of surfactants or binding agents, display a narrow size distribution and are 30 to 500 nm in cross section. In an embodiment of the invention, the CIS comprising nanoparticles are combined with a solvent to form an ink. In another embodiment of the invention, the ink can be used for screen or ink-jet printing a precursor layer that can be annealed to a CIS comprising absorber layer for a photovoltaic device.
    Type: Application
    Filed: June 22, 2011
    Publication date: May 16, 2013
    Applicant: UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, INC.
    Inventors: Timothy James Anderson, Chinho Park, Rangarajan Krishnan, Umme Farva