Patents by Inventor Hanan Liu

Hanan Liu 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).

  • Piezo electrophoretic display
    Patent number: 11493821
    Abstract: A writing apparatus including a first electrode, a layer of piezoelectric material; and a layer of electrophoretic material positioned between the first electrode and the layer of piezoelectric material, wherein stress on the layer of piezoelectric material results in optical changes in the layer of electrophoretic material.
    Type: Grant
    Filed: August 13, 2019
    Date of Patent: November 8, 2022
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Haiyan Gu, Hanan Liu, HongMei Zang
  • PIEZO ELECTROPHORETIC DISPLAY
    Publication number: 20200057348
    Abstract: A writing apparatus including a first electrode, a layer of piezoelectric material; and a layer of electrophoretic material positioned between the first electrode and the layer of piezoelectric material, wherein stress on the layer of piezoelectric material results in optical changes in the layer of electrophoretic material.
    Type: Application
    Filed: August 13, 2019
    Publication date: February 20, 2020
    Inventors: Haiyan GU, Hanan LIU, HongMei ZANG
  • Embossing tool and methods of preparation
    Patent number: 9919553
    Abstract: The present invention is directed to an embossing tool having a microstructure on its surface wherein the surface of the embossing tool has a thin layer of gold or an alloy thereof. Such an embossing tool not only can reduce adhesion between the surface of the embossing tool and a cured material, but also does not cause any significant change to the profile of the microstructure.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: March 20, 2018
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Yih-Ming Kang, Du Quy Le, Hanan Liu, Yu Li, Donald A. Schultz
  • EMBOSSING TOOL AND METHODS OF PREPARATION
    Publication number: 20160059617
    Abstract: The present invention is directed to an embossing tool having a microstructure on its surface wherein the surface of the embossing tool has a thin layer of gold or an alloy thereof. Such an embossing tool not only can reduce adhesion between the surface of the embossing tool and a cured material, but also does not cause any significant change to the profile of the microstructure.
    Type: Application
    Filed: August 31, 2015
    Publication date: March 3, 2016
    Inventors: Yih-Ming Kang, Du Quy LE, Hanan LIU, Yu LI, Donald A. Schultz
  • EMBOSSING TOOL AND METHODS OF PREPARATION
    Publication number: 20160059442
    Abstract: The present invention is directed to an embossing tool having a microstructure on its surface wherein the surfaces of the microstructures are overcoated with a precious metal or an alloy thereof. Such an embossing tool not only can reduce adhesion between the surface of the embossing tool and a cured material, but also does not cause any significant change to the profile of the microstructure.
    Type: Application
    Filed: September 2, 2014
    Publication date: March 3, 2016
    Inventors: Yih-Ming KANG, Du Quy LE, Hanan LIU, Yu LI, Donald A. Schultz
  • EMBOSSING ASSEMBLY AND METHODS OF PREPARATION
    Publication number: 20140050814
    Abstract: The invention is directed to an embossing assembly and methods for its preparation. The assembly comprises a drum, a non-expandable insert and an embossing sleeve and it is particularly useful for the preparation of microcups used in a display device. The assembly may also comprise only a drum and an embossing sleeve.
    Type: Application
    Filed: August 17, 2012
    Publication date: February 20, 2014
    Inventors: Gary Yih-Ming KANG, Hanan Liu, Du Quy Le
  • Post conversion methods for display devices
    Patent number: 7905977
    Abstract: The present invention relates to the use of a scraping element for removing part of a display film coated or laminated to an electrode layer to expose the electrode layer for connection to a drive circuitry. The present invention is directed to a method for removing a portion of a display film coated or laminated on an electrode layer, a process for preparing a display device, and a process for preparing a passive matrix display device.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: March 15, 2011
    Assignee: SiPix Imaging, Inc.
    Inventors: Jun Qi, John Hanan Liu, Yi-Shung Chaug
  • Embossing assembly and methods of preparation
    Patent number: 7767126
    Abstract: The invention is directed to an embossing assembly comprising an embossing sleeve having a three-dimensional pattern formed thereon, an expandable insert; and a drum over which said sleeve and said expandable insert are mounted. The present invention is also directed to a method for preparing an embossing drum or an embossing sleeve. The present invention is further directed to a method for controlling the thickness of a plating material over the surface of a drum or sleeve in an electroplating process.
    Type: Grant
    Filed: August 2, 2006
    Date of Patent: August 3, 2010
    Assignee: SiPix Imaging, Inc.
    Inventors: Gary Yih-Ming Kang, John Hanan Liu, Yi-Shung Chaug
  • Flexible display testing and inspection
    Patent number: 7683606
    Abstract: The present invention provides methods and systems for testing and inspection of a display panel. The methods involve the application of voltages to rollers or testing conductive films. By applying a potential difference to the appropriate rollers or testing conductive films, different optical states of a display panel can be displayed for inspection.
    Type: Grant
    Filed: May 22, 2007
    Date of Patent: March 23, 2010
    Assignee: Sipix Imaging, Inc.
    Inventors: Gary Yih-Ming Kang, John Hanan Liu, Wanheng Wang, Yi-Shung Chaug
  • POST CONVERSION METHODS FOR DISPLAY DEVICES
    Publication number: 20080149271
    Abstract: The present invention relates to the use of a scraping element for removing part of a display film coated or laminated to an electrode layer to expose the electrode layer for connection to a drive circuitry. The present invention is directed to a method for removing a portion of a display film coated or laminated on an electrode layer, a process for preparing a display device, and a process for preparing a passive matrix display device.
    Type: Application
    Filed: November 16, 2007
    Publication date: June 26, 2008
    Inventors: Jun Qi, John Hanan Liu, Yi-Shung Chaug
  • Backplane design for display panels and processes for their manufacture
    Patent number: 7304780
    Abstract: The present invention relates to a backplane design for display panels and processes for their manufacture. The invention provides cost-effective ways to manufacture a display panel because the manufacture does not involve the use of a patterned ITO substrate, flexible printed circuit board or rigid circuit board. In addition, a roll-to-roll process can be employed to manufacture the display panel.
    Type: Grant
    Filed: November 15, 2005
    Date of Patent: December 4, 2007
    Assignee: SiPix Imaging, Inc.
    Inventors: John Hanan Liu, Gary Y. M. Kang, Yi-Shung Chaug