Patents by Inventor Huadong Dai

Huadong Dai 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).

  • Touch stylus, touch detection method and touch detection system
    Patent number: 8786564
    Abstract: The embodiments of the present invention disclose a touch stylus, a touch detection method and a touch detection system, which are suitable to be used for writing on a capacitive touch screen and can increase the success rate of touch. A method according to an embodiment of the present invention includes: receiving, by a sensing electrode, a square wave signal sent from a stylus tip of a touch stylus; performing a detection process on the square wave signal, by a sensing detection unit, the sensing detection unit having a clock synchronized with a clock of the touch stylus; determining, by a signal processing unit, whether a touch event occurs according to the square wave signal processed with the detection process; and calculating position coordinates of the touch event and reporting the position coordinates to a system control unit, by the signal processing unit, if a touch event occurs.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: July 22, 2014
    Assignee: Focaltech Systems, Ltd.
    Inventors: Lianghua Mo, Huaiyi Xu, Jincheng Tian, Huadong Dai, Xinxi Jiang, Hua Li
  • TOUCH STYLUS, TOUCH DETECTION METHOD AND TOUCH DETECTION SYSTEM
    Publication number: 20130169601
    Abstract: The embodiments of the present invention disclose a touch stylus, a touch detection method and a touch detection system, which are suitable to be used for writing on a capacitive touch screen and can increase the success rate of touch. A method according to an embodiment of the present invention includes: receiving, by a sensing electrode, a square wave signal sent from a stylus tip of a touch stylus; performing a detection process on the square wave signal, by a sensing detection unit, the sensing detection unit having a clock synchronized with a clock of the touch stylus; determining, by a signal processing unit, whether a touch event occurs according to the square wave signal processed with the detection process; and calculating position coordinates of the touch event and reporting the position coordinates to a system control unit, by the signal processing unit, if a touch event occurs.
    Type: Application
    Filed: March 23, 2012
    Publication date: July 4, 2013
    Applicant: FOCALTECH SYSTEMS, LTD.
    Inventors: Lianghua Mo, Huaiyi Xu, Jincheng Tian, Huadong Dai, Xinxi Jiang, Hua Li