Patents by Inventor Haipeng Zhang

Haipeng 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).

  • METHODS AND SYSTEMS FOR ON-DEVICE SOCIAL GROUPING
    Publication number: 20140337340
    Abstract: Methods, systems, and computer readable media for social grouping are provided to perform social grouping of a user's contacts based on the user's interactions with the contacts. A set of attributes associated with interactions between a user and a set of contacts may be determined by a first device. The set of attributes associated with the interactions may be related to the first device. The set of contacts may be organized into a set of groups based on the set of attributes.
    Type: Application
    Filed: May 9, 2014
    Publication date: November 13, 2014
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jun Yang, Zhixian Yan, Lu Luo, Xuan Bao, Haipeng Zhang, Emmanuel Munguia Tapia
  • High repetition rate photoconductive terahertz emitter using a radio frequency bias
    Patent number: 8642964
    Abstract: A terahertz generation system that emits pulsed THz radiation and incorporates a rapidly oscillating, high voltage bias across electrodes insulated from a photoconductive material. The system includes an ultrafast optical pulse source configured to generate an optical pulse having a duration between about ten picoseconds and ten femtoseconds, the pulse further having a repetition rate of about one megahertz or higher. The system further includes a photoconductor configured to receive the optical pulse from the ultrafast optical pulse source and to generate a terahertz frequency pulse, the photoconductor having insulated electrodes. The system still further includes a radio frequency generator configured to apply an electric field to the photoconductor via the insulated electrodes.
    Type: Grant
    Filed: August 22, 2011
    Date of Patent: February 4, 2014
    Assignee: The United States of America, as represented by the Secretary of Commerce, NIST
    Inventors: Steven Cundiff, Jared Wahlstrand, Haipeng Zhang, Soobong Choi
  • HIGH REPETITION RATE PHOTOCONDUCTIVE TERAHERTZ EMITTER USING A RADIO FREQUENCY BIAS
    Publication number: 20120126122
    Abstract: A terahertz generation system that emits pulsed THz radiation and incorporates a rapidly oscillating, high voltage bias across electrodes insulated from a photoconductive material. The system includes an ultrafast optical pulse source configured to generate an optical pulse having a duration between about ten picoseconds and ten femtoseconds, the pulse further having a repetition rate of about one megahertz or higher. The system further includes a photoconductor configured to receive the optical pulse from the ultrafast optical pulse source and to generate a terahertz frequency pulse, the photoconductor having insulated electrodes. The system still further includes a radio frequency generator configured to apply an electric field to the photoconductor via the insulated electrodes.
    Type: Application
    Filed: August 22, 2011
    Publication date: May 24, 2012
    Inventors: Steven Cundiff, Jared Wahlstrand, Haipeng Zhang, Soobong Choi