Patents by Inventor Hongmei Zang

Hongmei Zang 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).

  • ELECTROPHORETIC DISPLAY
    Publication number: 20120176663
    Abstract: The present invention is directed to an electrophoretic display comprising: (a) microcups comprising partition walls and top-openings; (b) an organic-based electrophoretic fluid filled in the microcups, wherein said fluid comprises charged pigment particles dispersed in a solvent; and (c) a top-sealing layer formed from a sealing composition to enclose the electrophoretic fluid within the microcups. The sealing composition comprises: (i) a water soluble polymer, (ii) a water-based suspension, a water-based dispersion, a water-based emulsion, or a water-based latex, each comprising a polymer; and (iii) water.
    Type: Application
    Filed: March 21, 2012
    Publication date: July 12, 2012
    Inventors: HongMei ZANG, Hui Chen
  • ELECTROPHORETIC DISPERSION
    Publication number: 20120112131
    Abstract: The present invention is directed to an electrophoretic dispersion comprising pigment particles dispersed in a solvent or solvent mixture, wherein said pigment particles comprises at least one polymer chain comprising a terminal thiocarbonylthio group, attached to the particle surface. The invention also relates to pigment particles suitable for use in an electrophoretic dispersion and methods for their preparation through a RAFT polymerization technique.
    Type: Application
    Filed: November 2, 2011
    Publication date: May 10, 2012
    Inventors: Yu Li, Hui Du, Yayong Liu, Haiyan Gu, HongMei Zang
  • ELECTROPHORETIC DISPERSION
    Publication number: 20120049125
    Abstract: The present invention is directed to methods for the preparation of pigment particles suitable for use in an electrophoretic dispersion, particularly an electrophoretic dispersion in a fluorinated solvent. The method comprises: a) treating pigment particles to incorporate reactive groups onto the surface of the pigment particles; and b) reacting said reactive group with a functional group in a fluorinated monomer, oligomer or polymer to form a polymer layer over the surface of the pigment particles.
    Type: Application
    Filed: August 23, 2011
    Publication date: March 1, 2012
    Inventors: Hui Du, Yu Li, Wie-Ho Ting, Yayong Liu, Haiyan Gu, HongMei Zang
  • METHODS AND COMPOSITIONS FOR IMPROVED ELECTROPHORETIC DISPLAY PERFORMANCE
    Publication number: 20120013971
    Abstract: The invention is directed to methods and compositions useful for improving the performance of electrophoretic displays. The methods comprise adding a conductive filler in the form of nanoparticles and having a volume resistivity of less than about 104 ohm cm into at least one electrode protecting layer of the display.
    Type: Application
    Filed: August 31, 2011
    Publication date: January 19, 2012
    Inventors: Zarng-Arh George Wu, Xiaojia Wang, Xin Weng, Yajuan Chen, Rong-Chang Liang, HongMei Zang, Yayong Liu
  • MAGNETOPHORETIC AND ELECTROMAGNETOPHORETIC DISPLAYS
    Publication number: 20110292495
    Abstract: The present invention is directed to a display device which comprises two layers of insulating substrate, at least the substrate on the viewing side is transparent, an array of display cells sandwiched between the two layers of substrate, a writing means, and optionally an erasing means to magnetically or electrically erase the image. The display cells are filled with a dispersion of magnetic particles which may be charged or non-charged. The display of the invention eliminates the use of the transparent conductor film, such as ITO, on the viewing side. Therefore, the displays of this invention are more cost effective, more flexible and durable and capable of higher image contrast ratio and higher reflectance in the Dmin area.
    Type: Application
    Filed: August 9, 2011
    Publication date: December 1, 2011
    Inventors: Ching-Shon Ho, Jerry Chung, Paul Gendler, Rong-Chang Liang, HongMei Zang
  • PIGMENT PARTICLES FOR ELECTROPHORETIC DISPLAY
    Publication number: 20110242641
    Abstract: The present invention is directed to an electrophoretic display fluid, in particular, pigment particles dispersed in a solvent or solvent mixture, and methods for their preparation. The pigment particles generated, according to the present invention, are stable in solvent under an electric field, have desired charge and charge density on the particle surface.
    Type: Application
    Filed: April 4, 2011
    Publication date: October 6, 2011
    Inventors: Hui Du, Xiaojia Wang, HongMei Zang, Haiyan Gu
  • Transmissive or reflective liquid crystal display
    Patent number: 8023071
    Abstract: This invention relates to a liquid crystal display with improved contrast ratio, switching performance, reflectivity at the Dmin state and structural integrity, and methods for its manufacture. The liquid crystal display of the present invention comprises microcups as display cells, wherein the microcups are formed from a microcup composition and filled with a liquid crystal composition.
    Type: Grant
    Filed: August 17, 2006
    Date of Patent: September 20, 2011
    Assignee: SiPix Imaging, Inc.
    Inventors: Rong-Chang Liang, Scott C-J Tseng, Ying-Syi Li, HongMei Zang
  • Magnetophoretic and electromagnetophoretic displays
    Patent number: 8018643
    Abstract: The present invention is directed to a display device which comprises two layers of insulating substrate, at least the substrate on the viewing side is transparent, an array of display cells sandwiched between the two layers of substrate, a writing means, and optionally an erasing means to magnetically or electrically erase the image. The display cells are filled with a dispersion of magnetic particles which may be charged or non-charged. The display of the invention eliminates the use of the transparent conductor film, such as ITO, on the viewing side. Therefore, the displays of this invention are more cost effective, more flexible and durable and capable of higher image contrast ratio and higher reflectance in the Dmin area.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: September 13, 2011
    Assignee: SiPix Imaging, Inc.
    Inventors: Ching-Shon Ho, Jerry Chung, Paul Gendler, Rong-Chang Liang, HongMei Zang
  • PROCESS FOR PREPARING A DISPLAY PANEL
    Publication number: 20110217896
    Abstract: This application is directed to processes for preparing electrophoretic displays and semi-finished display panels comprising display cells prepared from the microcup and top-sealing technologies. The semi-finished display panel comprises an array of display cells sandwiched between two temporary substrate layers, between a temporary substrate layer and a conductor layer or between a temporary substrate layer and a permanent substrate layer, wherein said display cells are filled with an electrophoretic fluid and top-sealed with a polymeric sealing layer formed from a top-sealing composition which is being hardened while on top of the electrophoretic fluid.
    Type: Application
    Filed: February 14, 2011
    Publication date: September 8, 2011
    Inventors: Rong-Chang Liang, Mary Chan-Park, Scott C-J Tseng, Zarng-Arh George Wu, HongMei Zang, Xiaojia Wang
  • Process for forming a patterned thin film structure for in-mold decoration
    Patent number: 7972472
    Abstract: A process for forming a patterned thin film structure on a substrate or in-mold decoration film is disclosed. A pattern is printed with a material, such as a masking coating or ink, on the substrate, the pattern being such that, in one embodiment, the desired structures will be formed in the areas where the printed material is not present, i.e., a negative image of thin film structure to be formed is printed. In another embodiment, the pattern is printed with a material that is difficult to strip from the substrate, and the desired thin film structures will be formed in the areas where the printed material is present, i.e., a positive image of the thin film structure is printed. The thin film material is deposited on the patterned substrate, and the undesired area is stripped, leaving behind the patterned thin film structure.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: July 5, 2011
    Assignees: SiPix Imaging, Inc., Etansi Inc.
    Inventors: Yi-Shung Chaug, Xiaojia Wang, Sean Kiluk, Scott Tseng, HongMei Zang, Rong-Chang Liang
  • DISPLAY CELL STRUCTURE AND ELECTRODE PROTECTING LAYER COMPOSITIONS
    Publication number: 20110157682
    Abstract: The invention is directed to compositions of display cell structure and electrode protecting layers for improving the performance of display devices. The composition comprises a polar oligomeric or polymeric material having a glass transition temperature below about 100° C., and the resulting display cells or electrode protecting layer have an average crosslinking density of below about 1 crosslink point per 80 Dalton molecular weight.
    Type: Application
    Filed: January 14, 2011
    Publication date: June 30, 2011
    Inventors: HongMei Zang, Kangtai Ren, Jack Hou, Wanheng Wang, Chia-Pu Chang, Jing-Den Chen, Yajuan Chen, Fei Wang, Yi-Shung Chaug, Quan Gu, Hui Chen
  • High performance capsules for electrophoretic displays
    Patent number: 7955532
    Abstract: The present invention is directed to novel non-aqueous capsules suitable as display cells for an electrophoretic display and the encapsulation process for their manufacture. The present invention is also directed to an encapsulation process for the preparation of non-aqueous capsules suitable as display cells for an electrophoretic display. The process comprises emulsifying an internal phase comprising pigment particles or pigment-containing microparticles dispersed in a halogenated solvent and a halogenated shell-forming material into an external phase comprising a complementary chain extender or crosslinker in an organic solvent.
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: June 7, 2011
    Assignee: SiPix Imaging, Inc.
    Inventors: Rong-Chang Liang, HongMei Zang
  • Fluorinated dyes or colorants and their uses
    Patent number: 7951938
    Abstract: The present invention relates to novel fluorinated dyes or colorants having high solubility and low viscosity in halogenated, especially fluorinated, solvents. The dyes or colorants of the present invention have shown to improve the performance of electrophoretic displays. The invention is particularly directed to a fluorinated porphyrin dye or colorant expressed by Formula (VII).
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: May 31, 2011
    Assignee: SiPix Imaging, Inc.
    Inventors: Jin Yang, Kai-Chia Feng, Ying-Syi Li, HongMei Zang, Hong Wang, Chien-Hung Chou, Rong-Chang Liang
  • Durable layer composition for in-mold decoration
    Patent number: 7927711
    Abstract: This invention relates to a durable layer for in-mold decoration. The durable layer is formed from a composition comprising (i) a thermally crosslinkable and photochemically or radically graftable polymer, (ii) a non-ethylenical thermal crosslinker, and (iii) a radiation curable multifunctional monomer or oligomer. The durable layer of the present invention has excellent surface quality with a wider geometric tolerance and can be formed at low cost.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: April 19, 2011
    Assignee: SiPix Chemical Inc.
    Inventors: Xiaojia Wang, Haiyan Gu, Fei Wang, HongMei Zang, Tina Wu, Xin Huo, Rong-Chang Liang
  • Release layer for in-mold decoration
    Patent number: 7910205
    Abstract: This invention relates to a composition suitable for the formation of a release layer in an in-mold decoration or thermal transfer printing process. The invention also relates to a process for the formation of a release layer comprising dispersing or dissolving the release layer composition of the present invention in a solvent followed by curing said composition.
    Type: Grant
    Filed: February 28, 2008
    Date of Patent: March 22, 2011
    Assignee: SiPix Chemical Inc.
    Inventors: Fei Wang, Scott C. J. Tseng, Xiaojia Wang, Kai-Chia Feng, Haiyan Gu, HongMei Zang, Rong-Chang Liang
  • DISPLAY DEVICES HAVING MICRO-REFLECTORS AND COLOR FILTERS
    Publication number: 20110043894
    Abstract: The present invention relates to a process for manufacturing a brightness enhancement structure comprising micro-reflectors. The process comprises forming an array of micro-structures by embossing; and depositing a metal layer over the surface of the micro-structures. The present invention also relates to a process for manufacturing a display device comprising micro-reflectors. The present invention further relates to a display device comprising micro-reflectors and color filters.
    Type: Application
    Filed: November 3, 2010
    Publication date: February 24, 2011
    Inventors: Robert A. Sprague, Yi-Shung Chaug, HongMei Zang, Xiaojia Wang, Gary Kang
  • COLOR TUNING FOR ELECTROPHORETIC DISPLAY
    Publication number: 20110043543
    Abstract: The present invention is directed to a color tuning composition and a method for adjusting the color temperature of an electrophoretic display. A display device comprising a color tuning layer of the present invention has several advantages. For example, the colors of the images displayed may be modified according to different needs without affecting the performance of the display device; the level of whiteness may be improved; and in some cases, the need for a UV barrier layer may also be eliminated.
    Type: Application
    Filed: August 6, 2010
    Publication date: February 24, 2011
    Inventors: Hui Chen, HongMei Zang, Robert A. Sprague
  • ELECTROPHORETIC DISPLAY AND PROCESS FOR ITS MANUFACTURE
    Publication number: 20110000605
    Abstract: This invention relates to an electrophoretic display comprising a plurality of cells, each of said cells comprises: a) partition walls; b) an electrophoretic fluid filled therein; c) a polymeric sealing layer to enclose the electrophoretic fluid within the cell; and d) an interface between the electrophoretic fluid and the sealing layer.
    Type: Application
    Filed: April 1, 2010
    Publication date: January 6, 2011
    Inventors: Rong-Chang Liang, Mary Chan-Park, Scott C-J Tseng, Zarng-Arh George Wu, HongMei Zang
  • Compositions for liquid crystal display
    Patent number: 7850867
    Abstract: This invention relates to compositions and an assembly process for the manufacture of liquid crystal displays. The assembly process is especially advantageous because it can be easily scalable to roll-to-roll continuous manufacturing of liquid crystal displays. The invention is directed to a photoalignable top-sealing composition for top-sealing a liquid crystal display cell.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: December 14, 2010
    Assignee: SiPix Imaging, Inc.
    Inventors: Rong-Chang Liang, HongMei Zang, Haiyan Gu
  • Display devices having micro-reflectors
    Patent number: 7830592
    Abstract: The present invention relates to a process for manufacturing a brightness enhancement structure comprising micro-reflectors. The process comprises forming an array of micro-structures by embossing; and depositing a metal layer over the surface of the micro-structures. The present invention also relates to a process for manufacturing a display device comprising micro-reflectors. The present invention further relates to a display device comprising micro-reflectors.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: November 9, 2010
    Assignee: SiPix Imaging, Inc.
    Inventors: Robert A. Sprague, Yi-Shung Chaug, HongMei Zang, Xiaojia Wang, Gary Kang