Patents Assigned to E Ink California, LLC
  • Electrophoretic dispersion including charged pigment particles, uncharged additive nanoparticles, and uncharged neutral density particles
    Patent number: 10288975
    Abstract: The present invention is directed to an electrophoretic dispersion comprising charged pigment particles, in particular, an electrophoretic dispersion including both uncharged or lightly charged neutral buoyancy particles and uncharged or lightly charged additive particles. The combination improves the performance of an electrophoretic display, in particular the color state stability over time.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: May 14, 2019
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Robert A. Sprague, Bo-Ru Yang, Peter B. Laxton
  • Driving methods for color display devices
    Patent number: 10254619
    Abstract: The present invention provides driving methods for electrophoretic color display devices. The backplane system used for the driving methods is found to be simpler which renders color display devices more cost effective. More specifically, the driving method comprises first driving all pixels towards a color state by modulating only the common electrode, followed by driving all pixels towards their desired color states by maintaining the common electrode grounded and applying different voltages to the pixel electrodes.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: April 9, 2019
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Craig Lin, Chi-Mao Hung
  • Polymer additives used in color electrophoretic display medium
    Patent number: 10254622
    Abstract: An electrophoretic medium may be incorporated into an electrophoretic display that includes a dispersion containing a non-polar fluid, a plurality of first charged colored particles, polyisobutylene, and an additive selected from co-polymers of vinyl aromatics and at least one hydrocarbon having 2 to 5 carbons and at least one double bond. The co-polymer and the ratio of the co-polymer to polyisobutylene is selected, such that bistability performance is maintained while improving the color state performance of the display.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: April 9, 2019
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Ming Wang, Hui Du
  • Color display device
    Patent number: 10234742
    Abstract: A full color display device in which each pixel can display at least seven different optical states. Each pixel comprises two subpixels, and each subpixel includes a respective subpixel electrode driven by a driver. The electrophoretic fluid includes four types of particles, dispersed in a solvent or solvent mixture and each subpixel can display at least four different color states.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: March 19, 2019
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Bryan Hans Chan, Hui Du, Craig Lin, HongMei Zang
  • Electrophoretic medium comprising a mixture of charge control agents
    Patent number: 10233339
    Abstract: An electrophoretic medium including a mixture of charge control agents, for example quaternary amine salts of polyisobutylene combined with quaternary amine salts of unsaturated monomers. The described electrophoretic medium exhibits improved color saturation as compared to similar electrophoretic media having only one of the charge control agents.
    Type: Grant
    Filed: August 6, 2018
    Date of Patent: March 19, 2019
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Hui Du, Joshua A Ritchey, Olga Vladimirovna Barykina-Tassa, Vladimir Sofiyev
  • Color display device
    Patent number: 10162242
    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: Grant
    Filed: October 2, 2014
    Date of Patent: December 25, 2018
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Ming Wang, Hui Du, HongMei Zang, Peter Laxton
  • Methods for driving four particle electrophoretic display
    Patent number: 10147366
    Abstract: The present invention provides driving methods for a color display device in which each pixel can display four high-quality color states. More specifically, an electrophoretic fluid is provided which comprises four types of particles, dispersed in a solvent or solvent mixture.
    Type: Grant
    Filed: October 4, 2017
    Date of Patent: December 4, 2018
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Craig Lin, Ming-Jen Chang
  • Composite color particles
    Patent number: 10126627
    Abstract: The present invention is directed to a display fluid comprising charged composite color particles dispersed in a solvent. The composite color particle comprises core particles which are at least one color core particle and at least one core particle having a high refractive index, a shell in which the color core particles and the high refractive index core particles are completely or partially embedded, and steric stabilizer molecules on the surface of the composite color particle. A display fluid comprising the composite color particles of the present invention provides improved optical performance.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: November 13, 2018
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Ming Wang, Hui Du, Xin Liu
  • Color display device
    Patent number: 10126628
    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: Grant
    Filed: August 16, 2017
    Date of Patent: November 13, 2018
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Hui Du, HongMei Zang
  • Display controller system
    Patent number: 10115354
    Abstract: A display controller system with a memory controller and buffers is described. The system enables transferring data from the main memory of the CPU to the image memory without interfering with the image updating. As a result, the present invention may allow continuously updating the image display and continuously writing new image data from CPU to the image memory, which improves overall system performance.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: October 30, 2018
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Wen-Pin Chiu, Craig Lin
  • Display panel with pre-patterned images
    Patent number: 10073318
    Abstract: The present invention is directed to a panel comprising a plurality of microcells wherein each of the microcells has a bottom, the panel has a first area and a second area, and the microcells in the first area have substantially the same bottom thickness and the microcells in the second area have added bottom thicknesses. Such a panel is useful for many applications, such drug administrations.
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: September 11, 2018
    Assignee: E Ink California, LLC
    Inventors: Yih-Ming Kang, Donald A. Schultz
  • Surfactants for improving electrophoretic media performance
    Patent number: 10061123
    Abstract: Methods for improving the performance of electrophoretic media with the addition of acetylene surfactants comprising hydroxyl groups. In particular, the described acetylene surfactants reduce ghosting while improving the contrast ratio in electrophoretic displays.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: August 28, 2018
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Lin Shao, Haiyan Gu, Ming Wang, Vladimir Sofiyev
  • Electrophoretic display device
    Patent number: 10062337
    Abstract: An electrophoretic display is provided suitable for passive matrix driving. The electrophoretic display comprises three types of particles, with the first and second types of charged particles carrying charges of opposite polarities and have contrasting colors. The third type of particles has the same color as the first or the second type of particles.
    Type: Grant
    Filed: October 11, 2016
    Date of Patent: August 28, 2018
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Craig Lin, Bryan Hans Chan, Hui Du
  • Electrophoretic medium comprising a mixture of charge control agents
    Patent number: 10040954
    Abstract: An electrophoretic medium including a mixture of charge control agents, for example quaternary amine salts of polyisobutylene combined with quaternary amine salts of polyesters. The described electrophoretic medium exhibits improved color saturation as compared to similar electrophoretic media having only one of the charge control agents.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: August 7, 2018
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Hui Du, Joshua A Ritchey, Olga Vladimirovna Barykina-Tassa, Vladimir Sofiyev
  • Electrophoretic display fluid
    Patent number: 10036929
    Abstract: The present invention is directed to an electrophoretic fluid comprising charged particles dispersed in a solvent or solvent mixture, wherein (i) one type of particles which is non-white and non-black and formed from an inorganic pigment, (ii) another type of particles which is non-white and non-black and formed from an organic pigment, and both types of particles (i) and (II) are of different colors and carry the same charge polarity.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: July 31, 2018
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Hui Du, Craig Lin
  • Color display device
    Patent number: 10036931
    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: Grant
    Filed: October 28, 2016
    Date of Patent: July 31, 2018
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Bryan Hans Chan, Craig Lin, Hui Du, HongMei Zang
  • Driving methods for electrophoretic displays
    Patent number: 10032419
    Abstract: The present invention is directed to driving methods for driving 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: Grant
    Filed: April 1, 2016
    Date of Patent: July 24, 2018
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Craig Lin, Ming Wang
  • Electrophoretic fluid
    Patent number: 10025157
    Abstract: A red particle for an electrophoretic display. The particle includes a core of a diketopyrrolopyrrole pigment, a shell around the core comprising a methacrylate, and steric siloxane molecules extending from the shell.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: July 17, 2018
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Hui Du, Yu Li, Wei-Ho Ting, HongMei Zang, Ming Wang
  • Driving methods and circuit for bi-stable displays
    Patent number: 10002575
    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: Grant
    Filed: May 6, 2016
    Date of Patent: June 19, 2018
    Assignee: E INK CALIFORNIA, LLC
    Inventors: Robert A. Sprague, Andrew Ho, Yajuan Chen, HongMei Zang, Jialock Wong, Chein Wang
  • Color display device and driving methods therefor
    Patent number: 9922603
    Abstract: The invention relates to electrophoretic layers containing at least five different particles, and to driving methods for displaying at least five, and in some embodiments, six different colors at each pixel or sub-pixel.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: March 20, 2018
    Assignee: E INK CALIFORNIA, LLC
    Inventor: Craig Lin