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).

  • MICROCUP COMPOSITIONS
    Publication number: 20140147478
    Abstract: The present invention is directed to a composition for preparing the microcups and the toughness of the display panel formed from such a composition may be significantly improved. In some cases, the panel may have an elongation at break of more than 10% and it can be completely peeled off from the substrate layer on which it is formed, without causing any damage to the panel.
    Type: Application
    Filed: November 27, 2012
    Publication date: May 29, 2014
    Applicant: SIPIX IMAGING, INC.
    Inventors: Yu LI, HongMei ZANG
  • MICROSTRUCTURE FILM
    Publication number: 20140065369
    Abstract: The present invention is directed to a microstructure film comprising an area of microstructures and two edge areas, wherein the height of the highest part in the edge areas exceeds the height of the highest point in the microstructures, preferably by about 1 ?m to about 1 mm. The application also describes how such a film may be manufactured.
    Type: Application
    Filed: August 31, 2012
    Publication date: March 6, 2014
    Inventors: Craig LIN, Gary Yih-Ming Kang, Bryan Hans Chan, HongMei Zang
  • COLOR TUNING FOR ELECTROPHORETIC DISPLAY DEVICE
    Publication number: 20140055840
    Abstract: The present invention is directed to color tuning methods for electrophoretic display devices. For example, a color tuning agent may be added to a composition for forming a display cell structure or a primer layer. Alternatively, a separate color tuning layer may be added to a display device. Further, a color tuning agent may be added to an electrophoretic display fluid. The color tuning methods are useful for adjusting the color temperature of a display device.
    Type: Application
    Filed: August 22, 2013
    Publication date: February 27, 2014
    Applicant: SiPix Imaging, Inc.
    Inventors: HongMei Zang, Hui Chen, Quan Gu, Tyau-Jeen Lin, Robert A. Sprague, Bryan Hans Chan, Ming Wang, Hui Du, Craig Lin
  • ELECTROPHORETIC DISPLAY AND PROCESS FOR ITS MANUFACTURE
    Publication number: 20140057056
    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: August 23, 2013
    Publication date: February 27, 2014
    Applicant: SiPix Imaging, Inc.
    Inventors: Rong-Chang LIANG, Mary CHAN-PARK, Scott C-J TSENG, Zarng-Arh George WU, HongMei ZANG
  • ELECTROPHORETIC FLUID
    Publication number: 20140011913
    Abstract: The present invention is directed to a display fluid comprising charged composite pigment particles dispersed in a solvent. The composite pigment particle comprises at least a core pigment particle, a shell coated over the core pigment particle and steric stabilizer molecules on the surface of the composite pigment particle, wherein the shell is formed from a monomer and a co-monomer. A display fluid comprising the composite pigment particles provides improved display performance.
    Type: Application
    Filed: July 26, 2013
    Publication date: January 9, 2014
    Applicant: SiPix Imaging, Inc.
    Inventors: Hui DU, Craig Lin, Ming Wang, HongMei Zang
  • PIEZO ELECTROPHORETIC DISPLAY
    Publication number: 20130342892
    Abstract: The invention is directed to a variety of designs of piezo electrophoretic displays which may be driven without connecting to a power source. The piezo-electrophoretic display comprises an electrophoretic layer, a conductor layer, and a layer of piezo material. The processes for manufacturing the piezo electrophoretic displays are also provided.
    Type: Application
    Filed: June 12, 2013
    Publication date: December 26, 2013
    Inventors: Bryan Hans CHAN, Craig LIN, HongMei ZANG
  • Process for preparing a display panel
    Patent number: 8582197
    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: Grant
    Filed: February 14, 2011
    Date of Patent: November 12, 2013
    Assignee: SiPix Imaging, Inc.
    Inventors: Rong-Chang Liang, Mary Chan-Park, Scott C-J Tseng, Zarng-Arh George Wu, HongMei Zang, Xiaojia Wang
  • Methods and compositions for improved electrophoretic display performance
    Patent number: 8547628
    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: Grant
    Filed: August 31, 2011
    Date of Patent: October 1, 2013
    Assignee: SiPix Imaging, Inc.
    Inventors: Zarng-Arh George Wu, Xiaojia Wang, Xin Weng, Yajuan Chen, Rong-Chang Liang, HongMei Zang, Yayong Liu
  • Electrophoretic display and process for its manufacture
    Patent number: 8520292
    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: Grant
    Filed: April 1, 2010
    Date of Patent: August 27, 2013
    Assignee: SiPix Imaging, Inc.
    Inventors: Rong-Chang Liang, Mary Chan-Park, Scott C-J Tseng, Zarng-Arh George Wu, HongMei Zang
  • ELECTROPHORETIC FLUID
    Publication number: 20130175479
    Abstract: The present invention is directed to a display fluid comprising charged composite pigment particles dispersed in a solvent. The composite pigment particles have a density which matches to the density of the solvent in which they are dispersed. A display fluid comprising the composite pigment particles provides improved display performance.
    Type: Application
    Filed: July 13, 2012
    Publication date: July 11, 2013
    Inventors: Hui DU, Yu Li, Wei-Ho Ting, HongMei Zang, Ming Wang
  • Driving methods for bistable displays
    Patent number: 8462102
    Abstract: The disclosure relates to driving methods for bistable displays, in particular, driving methods comprising interleaving driving waveforms.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: June 11, 2013
    Assignee: SiPix Imaging, Inc.
    Inventors: Jialock Wong, Yajuan Chen, Robert Sprague, Hongmei Zang
  • Display cell structure and electrode protecting layer compositions
    Patent number: 8441432
    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: Grant
    Filed: January 14, 2011
    Date of Patent: May 14, 2013
    Assignee: SiPix Imaging, Inc.
    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
  • Functionalized halogenated polymers for microencapsulation
    Patent number: 8361620
    Abstract: The present invention is directed to a novel reactive protective colloid system suitable for stabilizing an electrophoretic display in which a halogenated solvent, particularly a fluorinated, more particularly a perfluorinated, solvent, or a mixture thereof, is used as the dielectric solvent.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: January 29, 2013
    Assignee: SiPix Imaging, Inc.
    Inventors: Hongmei Zang, Huiyong Paul Chen, Mahmoud-Zohdi Armoush, Denis Leroux, Rongchi Yu, Rong-Chang Liang
  • Pigment particles for electrophoretic display
    Patent number: 8363306
    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: Grant
    Filed: April 4, 2011
    Date of Patent: January 29, 2013
    Assignee: SiPix Imaging, Inc.
    Inventors: Hui Du, Xiaojia Wang, HongMei Zang, Haiyan Gu
  • Composition and process for the sealing of microcups in roll-to-roll display manufacturing
    Patent number: 8361356
    Abstract: The invention relates to a novel sealing composition for the manufacture of an electrophoretic or liquid crystal display, and a sealing process using the composition. The composition allows electrophoretic or liquid crystal cells to be seamlessly sealed and the sealing layer free of any defects.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: January 29, 2013
    Assignee: SiPix Imaging, Inc.
    Inventors: HongMei Zang, Xiaojia Wang
  • DRIVING METHODS AND CIRCUIT FOR BI-STABLE DISPLAYS
    Publication number: 20120320017
    Abstract: The disclosure is directed toward driving methods and a driving circuit which are particularly suitable for bi-stable displays. In certain embodiments, methods provide the fastest and most pleasing appearance to the desired image while maintaining the optimal image quality over the life expectancy of an electrophoretic display device.
    Type: Application
    Filed: August 28, 2012
    Publication date: December 20, 2012
    Inventors: Robert Sprague, Andrew Ho, Yajuan Chen, Hongmei Zang, Jialock Wong, Chein Wang
  • Driving methods for bistable displays
    Patent number: 8274472
    Abstract: Driving methods are described for display devices which have one or more dielectric layers in the path of an electric field driving the display. In an embodiment, image uniformity is improved by periodically refreshing, using an intermediate color state, pixels that remain in one color state before and after a change in displaying a first image and a second image, and by applying driving signals using voltage levels and durations that maintain a global DC balance in the display at near zero to avoid contrast reduction and image artifacts in the image.
    Type: Grant
    Filed: March 11, 2008
    Date of Patent: September 25, 2012
    Assignee: SiPix Imaging, Inc.
    Inventors: Wanheng Wang, Yajuan Chen, Robert Sprague, Andrew Ho, Hongmei Zang
  • Electrophoretic dispersions
    Patent number: 8257614
    Abstract: This invention relates to improved electrophoretic dispersions and a method for improving the performance of an electrophoretic display. The invention also relates to a method of inducing or enhancing the threshold voltage of an electrophoretic dispersion.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: September 4, 2012
    Assignee: SiPix Imaging, Inc.
    Inventors: Haiyan Gu, HongMei Zang, Jiunn Jye Hwang, Xin Weng, Jack Hou, Chih-Yuan Liao, Shih-Wei Ho, Rong-Chang Liang
  • ELECTROPHORETIC FLUID
    Publication number: 20120199798
    Abstract: The present invention is directed to a display fluid comprising charged composite pigment particles dispersed in a solvent. The composite pigment particles have a density which matches to the density of the solvent in which they are dispersed. A display fluid comprising the composite pigment particles provides improved display performance.
    Type: Application
    Filed: February 1, 2012
    Publication date: August 9, 2012
    Inventors: Hui Du, Yu Li, Wei-Ho Ting, HongMei Zang
  • Display devices having micro-reflectors and color filters
    Patent number: 8238021
    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: Grant
    Filed: November 3, 2010
    Date of Patent: August 7, 2012
    Assignee: Sipix Imaging, Inc.
    Inventors: Robert A. Sprague, Yi-Shung Chaug, HongMei Zang, Xiaojia Wang, Gary Kang