Patents Assigned to SiPix Imaging, Inc.
  • Publication number: 20150268531
    Abstract: The present invention provides a reflective color display device which can display multiple color states, without the disadvantages associated with previously known color display devices. The display fluid of the present invention comprises (a) black and white electrophoretic particles which are oppositely charged and (b) charged color-generating particles having photonic crystal characteristics, all of which are dispersed in a solvent or solvent mixture.
    Type: Application
    Filed: April 1, 2014
    Publication date: September 24, 2015
    Applicant: SiPix Imaging, Inc.
    Inventors: Ming WANG, Peter LAXTON, Yu LI
  • 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
  • Publication number: 20140340735
    Abstract: The present invention provides 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. The fluid may further comprise substantially uncharged neutral buoyancy particles.
    Type: Application
    Filed: May 15, 2014
    Publication date: November 20, 2014
    Applicant: SiPix Imaging, Inc.
    Inventors: Craig LIN, Hui Du, Ming Wang
  • Publication number: 20140340736
    Abstract: The present invention provides a multicolor display device which can display high quality color states. More specifically, an electrophoretic fluid is provided which comprises three or four types of particles and color filters are placed on the viewing side of the display device.
    Type: Application
    Filed: May 15, 2014
    Publication date: November 20, 2014
    Applicant: SiPix Imaging, Inc.
    Inventor: Craig LIN
  • Publication number: 20140340734
    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: Application
    Filed: May 15, 2014
    Publication date: November 20, 2014
    Applicant: SiPix Imaging, Inc.
    Inventors: Craig LIN, Chi-Mao HUNG
  • 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
  • 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
  • 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
  • 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
  • Patent number: 8797633
    Abstract: The present invention is directed to a display device assembly which comprises a display device and a luminance enhancement structure. The luminance enhancement structure is directly laminated onto an ITO layer with an adhesive. The assembly of the present invention provides improved performance of the luminance enhancement structure.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: August 5, 2014
    Assignee: SiPix Imaging, Inc.
    Inventors: Robert A. Sprague, Bryan Hans Chan, Craig Lin
  • Patent number: 8797258
    Abstract: The present invention is directed to a highlight color display. One of the key features of the invention is the dark color of the display fluid filled in the microcups, which allows the dark state to appear black. There is no alignment required between the pixel electrodes and the microcups. In practice, a standard active matrix array may be used to drive the display device.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: August 5, 2014
    Assignee: SiPix Imaging, Inc.
    Inventor: Robert A. Sprague
  • Patent number: 8797636
    Abstract: The present invention is directed to a display device comprising a display fluid layer sandwiched between a first substrate layer and a second substrate layer, and a light-enhancing layer between the display fluid layer and the second substrate layer. The light-enhancing structure can enhance the colors displayed by the display device, especially the colors displayed through lateral switching of the charged pigment particles in an electrophoretic fluid.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: August 5, 2014
    Assignee: SiPix Imaging, Inc.
    Inventors: Bo-Ru Yang, Yao-Jen Hsieh
  • Patent number: 8786935
    Abstract: The present invention is directed to a color display device wherein each of the display cells is filled with an electrophoretic fluid comprising two types of charged pigment particles dispersed in a colored medium. Multiple colors of high quality may be achieved by the present invention.
    Type: Grant
    Filed: May 29, 2012
    Date of Patent: July 22, 2014
    Assignee: SiPix Imaging, Inc.
    Inventor: Robert Sprague
  • Publication number: 20140177031
    Abstract: The invention relates to a method for driving a display cell filled with an electrophoretic fluid comprising two types of charged particles carrying opposite charge polarities and of two contrast colors, wherein the two types of pigment particles are dispersed in a solvent of a color or in a solvent with non-charged or slightly charged colored particles dispersed therein. The method comprises driving said display cell to display the color of the solvent or the color of the non-charged or slightly charged colored particles by applying a driving voltage which is about 1 to about 20% of the full driving voltage.
    Type: Application
    Filed: March 3, 2014
    Publication date: June 26, 2014
    Applicant: SiPix Imaging, Inc.
    Inventor: Craig LIN
  • Patent number: 8743077
    Abstract: The present invention relates to a front light system which can be built with thin film light emitting diodes (LEDs), such as organic light emitting diodes (OLEDs) or electro-luminescent light emitting diodes. The front light system may be built on a thin and flexible substrate and can generate lighting of satisfactory uniformity and with high efficiency. The system also can potentially be inexpensive. The front light system of the present invention is particularly suitable for keymat applications wherein a flexible reflective display on top of a touch sensitive surface or device, is used as an output device.
    Type: Grant
    Filed: July 29, 2008
    Date of Patent: June 3, 2014
    Assignee: SiPix Imaging, Inc.
    Inventor: Robert A. Sprague
  • 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
  • Patent number: 8730153
    Abstract: The disclosure relates to waveforms, circuits and methods for driving bistable displays.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: May 20, 2014
    Assignee: SiPix Imaging, Inc.
    Inventors: Robert Sprague, Wanheng Wang, Yajuan Chen, Andrew Ho, Bryan Hans Chan, Jialock Wong, Hong-Mei Zang
  • Patent number: 8714780
    Abstract: Display devices with a grooved luminance enhancement film on its viewing side and at least an auxiliary layer and/or edge sealing. The luminance enhancement film comprises columns and grooves in alternating order and each of the grooves has a cross-section comprising an apex angle and two edge lines.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: May 6, 2014
    Assignee: SiPix Imaging, Inc.
    Inventors: Andrew Ho, Bryan Chan, Craig Lin, Robert A. Sprague
  • Patent number: 8717664
    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 pigment particles, having different levels of size, threshold voltage or charge intensity.
    Type: Grant
    Filed: October 2, 2012
    Date of Patent: May 6, 2014
    Assignee: SiPix Imaging, Inc.
    Inventors: Ming Wang, Yu Li, Hui Du, Xiaojia Zhang
  • Patent number: 8704756
    Abstract: A method for driving a display cell filled with an electrophoretic fluid comprising two types of pigment particles carrying opposite charge polarities and of two contrast colors wherein said two types of pigment particles are dispersed in a solvent of a color, which method comprises driving said display cell to a color state which color is the color of the solvent by applying a driving voltage which is about 1 to about 20% of the full driving voltage.
    Type: Grant
    Filed: May 25, 2011
    Date of Patent: April 22, 2014
    Assignee: SiPix Imaging, Inc.
    Inventor: Craig Lin