Patents by Inventor Yajuan Chen

Yajuan Chen 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).

  • Patent number: 8975631
    Abstract: An array substrate, a manufacturing method, and a display device thereof are disclosed.
    Type: Grant
    Filed: December 23, 2012
    Date of Patent: March 10, 2015
    Assignee: Beijing BOE Optoelectronics Technology Co., Ltd.
    Inventors: Hao Wu, Yajuan Chen, Yanyan Yin, Lei Wang
  • Publication number: 20140346511
    Abstract: An array substrate, a manufacturing method, and a display device thereof are disclosed.
    Type: Application
    Filed: December 23, 2012
    Publication date: November 27, 2014
    Applicant: Beijing BOE Optoelectronics Technology Co., Ltd.
    Inventors: Hao Wu, Yajuan Chen, Yanyan Yin, Lei Wang
  • 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
  • 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: 8643595
    Abstract: A system and method are disclosed for reducing reverse bias in an electrophoretic display. The system and method include the application of varying levels of voltages across an array of electrophoretic display cells of the electrophoretic display to move the cells towards a stable state in a driving cycle. In addition, the system and method disconnect the voltages from the electrophoretic display cells at a time duration prior to reaching step transitions of the voltages during the driving cycle. Pre-driving approaches apply a first pre-driving voltage at a first polarity to the display cells before driving the display cells with a second driving voltage at a second, opposite polarity. Varying the time duration and amplitude of the pre-driving signals produces further beneficial reduction in reverse bias.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: February 4, 2014
    Assignee: SiPix Imaging, Inc.
    Inventors: Jerry Chung, Wanheng Wang, Yajuan Chen, Wei Yao, Jack Hou, Li-Yang Chu
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • Publication number: 20120013971
    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: Application
    Filed: August 31, 2011
    Publication date: January 19, 2012
    Inventors: Zarng-Arh George Wu, Xiaojia Wang, Xin Weng, Yajuan Chen, Rong-Chang Liang, HongMei Zang, Yayong Liu
  • Patent number: 7982479
    Abstract: The present invention relates to methods for inspection of defects in an electrophoretic display and related devices. The method may be carried out with one or more testing electrodes. The method comprises applying a voltage difference to two testing electrodes which are in contact with the display panel, or applying a voltage difference to a testing electrode and a electrode layer. The methods may be applied in in-line or off-line inspection of a display panel.
    Type: Grant
    Filed: April 4, 2007
    Date of Patent: July 19, 2011
    Assignee: SiPix Imaging, Inc.
    Inventors: Wanheng Wang, Yi-Shung Chaug, Yajuan Chen, Gary Yih-Ming Kang, Jimmy Yen
  • Publication number: 20110157682
    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: Application
    Filed: January 14, 2011
    Publication date: June 30, 2011
    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
  • Patent number: 7880958
    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: September 7, 2006
    Date of Patent: February 1, 2011
    Assignee: SiPix Imaging, Inc.
    Inventors: Hong Mei Zang, Kangtai Ren, Jack Hou, Wanheng Wang, Chia-Pu Chang, Jing-Den Chen, Yajuan Chen, Fei Wang, Yi-Shung Chaug
  • Publication number: 20100301280
    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: Application
    Filed: August 16, 2010
    Publication date: December 2, 2010
    Inventors: Zarng-Arh George Wu, Xiaojia Wang, Xin Weng, Yajuan Chen, Rong-Chang Liang
  • Patent number: 7800813
    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: March 14, 2007
    Date of Patent: September 21, 2010
    Assignee: SiPix Imaging, Inc.
    Inventors: Zarng-Arh George Wu, Xiaojia Wang, Xin Weng, Yajuan Chen, Rong-Chang Liang
  • Patent number: 7767112
    Abstract: This invention relates to electrophoretic displays having improved performance. The invention also relates to a method for inducing or enhancing the threshold voltage of an electrophoretic display, which method comprises adding a threshold promoter into an electrophoretic fluid which comprises charged pigment particles or pigment-containing microparticles dispersed in a dielectric solvent or solvent mixture.
    Type: Grant
    Filed: April 11, 2007
    Date of Patent: August 3, 2010
    Assignee: SiPix Imaging, Inc.
    Inventors: Jack Hou, HongMei Zang, Yajuan Chen, Jing-Den Chen, Chih-Yuan Liao, Rong-Chang Liang