Patents by Inventor Yajuan Chen

Yajuan Chen 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).

  • Electrode protection film for electrophoretic displays
    Publication number: 20050264869
    Abstract: The invention is directed to methods and compositions useful for enhancing adhesion and protecting electrode layers from corrosion, rust or oxidation.
    Type: Application
    Filed: May 18, 2005
    Publication date: December 1, 2005
    Inventors: Yajuan Chen, Xin Weng, Xiaojia Wang, Rong-Chang Liang
  • Electrophoretic compositions
    Publication number: 20050264868
    Abstract: This invention relates to a novel electrophoretic composition having improved colloidal stability, switching performance and temperature latitude.
    Type: Application
    Filed: October 27, 2004
    Publication date: December 1, 2005
    Inventors: Jiunn Hwang, HongMei Zang, Yajuan Chen, Xin Weng, Jack Hou, Rong-Chang Liang
  • Electrophoretic display with improved temperature latitude and switching performance
    Patent number: 6958849
    Abstract: The invention is directed to a novel electrophoretic fluid composition for improving the temperature latitude and switching performance of an electrophoretic display, particularly at low operation temperatures.
    Type: Grant
    Filed: September 15, 2003
    Date of Patent: October 25, 2005
    Assignee: SiPix Imaging Inc.
    Inventors: Yajuan Chen, Jack Hou, Wan Peter Hsu, Rong-Chang Liang
  • Modification of electrical properties of display cells for improving electrophoretic display performance
    Publication number: 20050189524
    Abstract: The invention is directed to a method for improving the performance of electrophoretic displays by modifying the electrical properties of the display cells.
    Type: Application
    Filed: February 18, 2005
    Publication date: September 1, 2005
    Inventors: Xin Weng, Yajuan Chen, Scott Tseng, Jack Hou
  • Electrophoretic display driving scheme
    Publication number: 20050146775
    Abstract: A system and method are disclosed for reducing reverse bias in an electrophoretic display. The system and method include the application of varying levels of voltages across an array of electrophoretic display cells of the electrophoretic display to move the cells towards a stable state in a driving cycle. In addition, the system and method disconnect the voltages from the electrophoretic display cells at a time duration prior to reaching step transitions of the voltages during the driving cycle. Pre-driving approaches apply a first pre-driving voltage at a first polarity to the display cells before driving the display cells with a second driving voltage at a second, opposite polarity. Varying the time duration and amplitude of the pre-driving signals produces further beneficial reduction in reverse bias.
    Type: Application
    Filed: October 25, 2004
    Publication date: July 7, 2005
    Inventors: Jerry Chung, Wanheng Wang, Yajuan Chen, Wei Yao, Jack Hou, Li-Yang Chu
  • Methods and compositions for improved electrophoretic display performance
    Publication number: 20050007648
    Abstract: The invention is directed to novel methods and compositions useful for improving the performance of electrophoretic displays. The methods comprise adding a high absorbance dye or pigment, or conductive particles, or a conductive filler in the form of nanoparticles and having a volume resistivity of less than about 104 ohm cm, a conductive filler in the form of nanoparticles and having a volume resistivity of less than about 104 ohm cm, or a charge transport material into an electrode protecting layer of the display.
    Type: Application
    Filed: February 23, 2004
    Publication date: January 13, 2005
    Inventors: Zarng-Arh Wu, Xiaojia Wang, Xin Weng, Yajuan Chen, Rong-Chang Liang
  • Electrophoretic display with improved temperature latitude and switching performance
    Publication number: 20040169633
    Abstract: The invention is directed to a novel electrophoretic fluid composition for improving the temperature latitude and switching performance of an electrophoretic display, particularly at low operation temperatures.
    Type: Application
    Filed: September 15, 2003
    Publication date: September 2, 2004
    Inventors: Yajuan Chen, Jack Hou, Wan Peter Hsu, Rong-Chang Liang
  • Electrophoretic display and novel process for its manufacture
    Publication number: 20040169912
    Abstract: This invention relates to an electrophoretic display with improved contrast ratio, switching performance, reflectivity at the Dmin state and structural integrity, and methods for its manufacture.
    Type: Application
    Filed: October 29, 2003
    Publication date: September 2, 2004
    Inventors: Rong-Chang Liang, Jack Hou, Yajuan Chen, Scott C-J Tseng, Jerry Chung
  • Electrophoretic dispersions
    Publication number: 20040131959
    Abstract: This invention relates to electrophoretic displays having improved performance.
    Type: Application
    Filed: October 9, 2003
    Publication date: July 8, 2004
    Inventors: Jack Hou, HongMei Zang, Yajuan Chen, Jing-Den Chen, Chih-Yuan Liao, Rong-Chang Liang