Patents Assigned to SiPix Imaging, Inc.
  • 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
  • Flexible backplane and methods for its manufacture
    Patent number: 8362488
    Abstract: The present invention is directed to a flexible backplane for direct drive display devices and methods for its manufacture. The flexible backplane has many advantages. Because there is no need for a polyimide layer and only one layer of metal foil is used, the backplanes may be manufactured at a relatively low cost.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: January 29, 2013
    Assignee: SiPix Imaging, Inc.
    Inventors: Yi-Shung Chaug, Ching-Shon Ho
  • DRIVING BISTABLE DISPLAYS
    Publication number: 20120274671
    Abstract: The disclosure relates to waveforms, circuits and methods for driving bistable displays.
    Type: Application
    Filed: May 14, 2012
    Publication date: November 1, 2012
    Applicant: SIPIX IMAGING, INC.
    Inventors: Robert Sprague, Wanheng Wang, Yajuan Chen, Andrew Ho, Bryan Hans Chan, Jialock Wong, Hong-Mei Zang
  • Transmissive or reflective liquid crystal display and process for its manufacture
    Patent number: 8282762
    Abstract: This invention relates to liquid crystal (LC) displays comprising cells of well-defined shape, size and aspect ratio which cells are filled with a liquid crystal composition preferably containing dichroic dye(s), and novel processes for their manufacture. The invention also relates to a process for forming a liquid crystal display, which process comprises forming a plurality of cells followed by filling each of said cells with a liquid crystal composition and said process is carried out continuously or semi-continuously.
    Type: Grant
    Filed: April 3, 2006
    Date of Patent: October 9, 2012
    Assignee: SiPix Imaging, Inc.
    Inventor: Rong-Chang Liang
  • 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
  • Driving bistable displays
    Patent number: 8243013
    Abstract: The disclosure relates to waveforms, circuits and methods for driving bistable displays.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: August 14, 2012
    Assignee: Sipix Imaging, Inc.
    Inventors: Robert Sprague, Wanheng Wang, Yajuan Chen, Andrew Ho, Bryan Hans Chan, Jialock Wong, Hong-Mei Zang
  • Display device with a brightness enhancement structure
    Patent number: 8237892
    Abstract: The present invention is directed to display devices with a brightness enhancement structure comprising display cells comprising partition walls, and brightness enhancement micro-structures. The present invention is also directed to processes for the manufacture of display devices. The processes enable fabricating a display device with the micro-structures aligned with the display cells of the display device.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: August 7, 2012
    Assignee: Sipix Imaging, Inc.
    Inventors: Robert A. Sprague, Craig Lin
  • 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
  • Methods and compositions for improved electrophoretic display performance
    Patent number: 8179589
    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, or a charge transport material into an electrode protecting layer of the display.
    Type: Grant
    Filed: August 16, 2010
    Date of Patent: May 15, 2012
    Assignee: SiPix Imaging, Inc.
    Inventors: Zarng-Arh George Wu, Jeanne E. Haubrich, Xiaojia Wang, Rong-Chang Liang
  • Color display devices
    Patent number: 8169690
    Abstract: The present invention is directed to color display devices. The color display devices comprise display cells which is capable of displaying multiple color states. The display device may also comprise black matrix layers or a brightness enhancement structure on the viewing side. The present invention is directed to a display device comprising a plurality of display cells, wherein each of said display cells is sandwiched between a first layer comprising a common electrode and a second layer comprising a plurality of driving electrodes and at least one of the driving electrodes is a designated electrode, and said display device further comprises blocking layers on its viewing side and said blocking layers are located in positions corresponding to the designated electrodes.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: May 1, 2012
    Assignee: Sipix Imaging, Inc.
    Inventors: Craig Lin, Robert A. Sprague
  • Price tag system
    Patent number: 8162212
    Abstract: The price tag system of the present invention has the advantages of reliability, easy to install and low cost. Using the system of the invention, the prices can be easily updated even from a remote location. In addition, if there is one defective panel, the defective panel can be easily removed and replaced without any changes made to the base structure, which also greatly reduces the operation costs.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: April 24, 2012
    Assignee: Sipix Imaging, Inc.
    Inventors: Jerry Chung, Jack Hou, Rong-Chang Liang
  • Reflective displays and processes for their manufacture
    Patent number: 8159636
    Abstract: The present invention relates to reflective displays and processes for their manufacture.
    Type: Grant
    Filed: March 20, 2006
    Date of Patent: April 17, 2012
    Assignee: Sipix Imaging, Inc.
    Inventors: Chenhang Sun, Haiyan Gu, Xiaojia Wang, Yajuan Chen, Jack Hou
  • Electrophoretic display structures
    Patent number: 8154790
    Abstract: This invention relates to a display device comprising a plurality of display cells, wherein said display cells are separated by slanted partition walls. This invention also relates to a display device comprising a plurality of display cells, wherein said display cells are separated by indented partition walls having indented areas. The electrophoretic structures of the present invention may be manufactured by a continuous or semi-continuous roll-to-roll manufacturing process. The structures in which display cells are separated by slanted partition walls or partition walls having indented areas are capable of providing enhanced color states.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: April 10, 2012
    Assignee: Sipix Imaging, Inc.
    Inventors: Xiaojia Wang, Robert A. Sprague, Gary Yih-Ming Kang
  • Luminance enhancement structure for reflective display devices
    Patent number: 8120836
    Abstract: The present invention is directed to luminance enhancement structures for reflective display devices. The structure comprises columns and grooves, wherein each of said grooves has a cross-section comprising an apex angle and two edge lines. The structure increases the overall reflectance by reducing the total internal reflection, and as a result, the brightness of a display device is increased.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: February 21, 2012
    Assignee: SiPix Imaging, Inc.
    Inventors: Craig Lin, Robert A. Sprague
  • Fluorinated dyes and their use in electrophoretic display devices
    Patent number: 8119802
    Abstract: This invention relates to process for preparing fluorinated dyes selected from the group consisting of compounds of the general formulae (I) and (III) and mixtures thereof by reacting the corresponding compounds which do not have R12 or R30 as substituents with compounds of the general formula R12A or R30A where A is selected from the group consisting of I and Br, the compounds obtained from said process and the use of these fluorinated dyes in electrophoretic displays.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: February 21, 2012
    Assignees: BASF Aktiengesellschaft, Sipix Imaging Inc.
    Inventors: Nicolle Moonen, Stephan Hess, Jianqiang Qu, Markus Hoffmann, Ying-Syi Li, Jin Yang, Gerhard Wagenblast, Alfred Rennig, Thomas Gessner, Helmut Reichelt, Patrick Amrhein
  • Thickness distribution control for electroplating
    Patent number: 8114262
    Abstract: The invention is directed to an assembly for electroplating comprising an electroplating bath and non-conductive plates. The invention is also directed to an assembly for electroplating comprising an electroplating bath, elements with electrically adjustable resistance, and ampere-hour meters. The invention is further directed to methods for monitoring, controlling and adjusting the thickness distribution of an electroplated material on an object. The object can be of any shape as long as it can electrically charged.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: February 14, 2012
    Assignee: SiPix Imaging, Inc.
    Inventors: Gary Yih-Ming Kang, Yi-Shung Chaug
  • Color display devices
    Patent number: 8072675
    Abstract: The present invention is directed to color display devices in which each display cell is capable of displaying three color states. The display fluid filled in the display cells comprises two types of pigment particles. The color display device may further comprise a brightness enhancement structure on its viewing side.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: December 6, 2011
    Assignee: SiPix Imaging, Inc.
    Inventors: Craig Lin, Robert A. Sprague