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).

  • COLOR TUNING FOR ELECTROPHORETIC DISPLAY DEVICE
    Publication number: 20150301246
    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: July 2, 2015
    Publication date: October 22, 2015
    Inventors: HongMei ZANG, Hui Chen, Quan Gu, Tyau-Jeen Lin, Robert A. Sprague, Bryan Hans Chan
  • ELECTROPHORETIC FLUID
    Publication number: 20150301425
    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: May 29, 2015
    Publication date: October 22, 2015
    Inventors: Hui DU, Craig Lin, Ming Wang, HongMei Zang
  • Magnetophoretic and electromagnetophoretic displays
    Patent number: 9114663
    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: August 9, 2011
    Date of Patent: August 25, 2015
    Assignee: E Ink California, LLC
    Inventors: Ching-Shon Ho, Jerry Chung, Paul Gendler, Rong-Chang Liang, HongMei Zang
  • COLOR DISPLAY DEVICE
    Publication number: 20150198858
    Abstract: The present invention provides a full color display device in which each pixel can display multiple high-quality color states. More specifically, an electrophoretic fluid is provided which comprises four types of particles, dispersed in a solvent or solvent mixture and each pixel can display at least five different color states.
    Type: Application
    Filed: January 13, 2015
    Publication date: July 16, 2015
    Inventors: Bryan Hans Chan, Hui Du, Craig Lin, HongMei Zang
  • Electrophoretic display and process for its manufacture
    Patent number: 9081250
    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: August 23, 2013
    Date of Patent: July 14, 2015
    Assignee: E Ink California, LLC
    Inventors: Rong-Chang Liang, Mary Chan-Park, Scott C-J Tseng, Zarng-Arh George Wu, HongMei Zang
  • METHOD FOR IMPROVING IMAGE STABILITY OF ELECTROPHORETIC FLUID
    Publication number: 20150185509
    Abstract: The present invention is directed to a display fluid comprising composite pigment particles dispersed in a solvent. The composite pigment particles may exhibit dual functions, that is, they may provide a color to a display device, and also modify the rheology of the fluid without affecting the image switching speed.
    Type: Application
    Filed: December 31, 2014
    Publication date: July 2, 2015
    Inventors: Ming WANG, Peter Laxton, Hui Du, HongMei Zang
  • Piezo electrophoretic display
    Patent number: 9025238
    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: Grant
    Filed: June 12, 2013
    Date of Patent: May 5, 2015
    Assignee: E Ink California, LLC
    Inventors: Bryan Hans Chan, Craig Lin, HongMei Zang
  • COLOR DISPLAY DEVICE
    Publication number: 20150103394
    Abstract: The present invention provides a solution for a highlight or multicolor display device, in which each display cell can display high quality color states. More specifically, an electrophoretic fluid is provided which comprises three types of charged particles and a fourth type of particles which is substantially uncharged neutral buoyancy particles, all of which are dispersed in a solvent or solvent mixture.
    Type: Application
    Filed: October 2, 2014
    Publication date: April 16, 2015
    Inventors: Ming WANG, Hui Du, HongMei Zang, Peter Laxton
  • DRIVING METHODS FOR COLOR DISPLAY DEVICE
    Publication number: 20150097877
    Abstract: The present invention is directed to driving methods for a color display device which can display high quality color states. The display device utilizes an electrophoretic fluid which comprises three types of pigment particles having different optical characteristics.
    Type: Application
    Filed: October 6, 2014
    Publication date: April 9, 2015
    Inventors: Craig LIN, Jo-Cheng Huang, Heng-Che Chen, Peter Laxton, Ming Wang, Ping-Yueh Cheng, HongMei Zang
  • COMPOSITION AND PROCESS FOR SEALING MICROCELLS
    Publication number: 20150098124
    Abstract: The present invention is directed to an improved method for sealing microcells. More specifically, the invention is directed to the formation of covalent bonding between a sealing layer and a microcell structure. A microcell-based display device, formed according to the present invention, has a strong adhesion between the sealing layer and partition walls in the microcell structure which can prevent defects and significantly improve reliability of the device.
    Type: Application
    Filed: October 3, 2014
    Publication date: April 9, 2015
    Inventors: Yu LI, Zoran Topalovic, Ming Wang, HongMei Zang, Hui Du
  • ELECTROPHORETIC DISPLAY FILM FOR ANTI-COUNTERFEIT APPLICATION
    Publication number: 20150070751
    Abstract: The present invention is directed to an electrophoretic display film which can be controlled to malfunction permanently within a period of time. It provides an elegant method to utilize an electrophoretic film for anti-counterfeit purposes. The concept involves the removal of strong barrier layer(s) from the film to allow the solvent in the electrophoretic fluid within the film to evaporate through weak barrier layer(s), and within a period of time, the performance of the display film will be significantly degraded and the film cannot be re-used.
    Type: Application
    Filed: September 9, 2013
    Publication date: March 12, 2015
    Applicant: SiPix Imaging, Inc.
    Inventors: Yu LI, HongMei ZANG
  • Silane-containing pigment particles for electrophoretic display
    Patent number: 8961831
    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 and can improve the performance of an electrophoretic display.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: February 24, 2015
    Assignee: E Ink California, LLC
    Inventors: Hui Du, Haiyan Gu, HongMei Zang
  • DISPLAY
    Publication number: 20150036206
    Abstract: A display includes a display medium layer and a dielectric layer disposed at a side of the display medium layer. The composition of the dielectric layer includes at least a humectant for decreasing the electric resistivity of the dielectric layer and stabilizing the electric performance of the display.
    Type: Application
    Filed: August 2, 2013
    Publication date: February 5, 2015
    Applicant: SiPix Technology, Inc.
    Inventors: Cheng-Yuan Lai, Hui Chen, Jung-An Cheng, Wei-Ho Ting, Yu Li, Hongmei Zang, Ming Wang, Zoran Topalovic, Tyau-Jeen Lin
  • ELECTROPHORETIC DISPLAY
    Publication number: 20150005720
    Abstract: The present invention is directed to a transdermal delivery system for delivering a medicinal or cosmetic agent through the skin of a subject, which delivery system comprises (a) one or more display cells comprising partition walls and top-openings; (b) a liquid composition filled in the display cells wherein said liquid composition comprises the medicinal or cosmetic agent; and (c) a sealing layer to enclose the liquid composition within the microcups wherein said sealing layer is hardened in situ.
    Type: Application
    Filed: August 1, 2014
    Publication date: January 1, 2015
    Inventor: HongMei ZANG
  • SILANE-CONTAINING PIGMENT PARTICLES FOR ELECTROPHORETIC DISPLAY
    Publication number: 20140339480
    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 and can improve the performance of an electrophoretic display.
    Type: Application
    Filed: May 31, 2011
    Publication date: November 20, 2014
    Inventors: Hui Du, Haiyan Gu, HongMei Zang
  • COLOR DISPLAY DEVICE
    Publication number: 20140313566
    Abstract: The present invention provides a realistic solution for a highlight or multicolor display device which can display high quality color states. More specifically, an electrophoretic fluid is provided which comprises four types of particles, having different levels of size, threshold voltage or charge intensity.
    Type: Application
    Filed: April 18, 2014
    Publication date: October 23, 2014
    Applicant: SiPix Imaging, Inc.
    Inventors: Hui DU, HongMei ZANG
  • DRIVING BISTABLE DISPLAYS
    Publication number: 20140300651
    Abstract: The invention relates to waveforms, circuits and methods for driving bistable displays. The invention is directed to a method, comprising in combination: applying, across a bistable display device, a shaking signal comprising a plurality of positive and negative pulses each driven for a first time to disperse partially packed particles; applying, across the device, one or more first driving signals to first pixels of the device for second times that are sufficient to drive the first pixels to one or more reference states; and concurrently with the first driving signals, applying, across the device, one or more second driving signals to second pixels of the device for third times that are shorter than necessary to drive the second pixels to any of the one or more reference states.
    Type: Application
    Filed: April 11, 2014
    Publication date: October 9, 2014
    Applicant: SiPix Imaging, Inc.
    Inventors: Robert A. SPRAGUE, Wanheng Wang, Yajuan Chen, Andrew Ho, Bryan Hans Chan, Jialock Wong, HongMei Zang
  • ELECTROPHORETIC DISPLAY DEVICE
    Publication number: 20140293398
    Abstract: The present invention is directed to an electrophoretic display device which is suitable for passive matrix driving. The electrophoretic fluid may comprise two types of charged pigment particles wherein the two types of charged pigment particles carry opposite charge polarities, have contrasting colors and have different levels of charge intensity. Alternatively, there may be a third type of particles added to the fluid.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 2, 2014
    Applicant: SIPIX IMAGING, INC.
    Inventors: Ming WANG, Craig LIN, Hui DU, HongMei ZANG, XiaoJia ZHANG
  • Electrophoretic display
    Patent number: 8830561
    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: Grant
    Filed: March 21, 2012
    Date of Patent: September 9, 2014
    Assignee: E Ink California, LLC
    Inventors: HongMei Zang, Hui Chen
  • ELECTROPHORETIC FLUID
    Publication number: 20140231728
    Abstract: The present invention is directed to an electrophoretic fluid comprising transparent particles, as an additive. The presence of the transparent particles in the fluid provides improved display performance.
    Type: Application
    Filed: February 12, 2014
    Publication date: August 21, 2014
    Applicant: SIPIX IMAGING, INC.
    Inventors: Hui DU, Ming Wang, Yu Li, Roman Ivanov, HongMei Zang