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).
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Patent number: 11735127Abstract: A driving method for driving an electrophoretic display comprising four types of particles, the first type of particles and the third type of particles are positively charged, and the second type of particles and the fourth type of particles are negatively charged, the method comprises the steps of: (i). applying a first driving voltage to the pixel of the electrophoretic display for a first period of time at a first amplitude to drive the pixel to a color state of the fourth type of particle at the viewing side; and (ii). applying a second driving voltage to the pixel of the electrophoretic display for a second period of time, opposite to that of the first driving voltage and a second amplitude smaller than that of the first amplitude, to drive the second type particle towards the non-viewing side.Type: GrantFiled: March 25, 2022Date of Patent: August 22, 2023Assignee: E INK CALIFORNIA, LLCInventors: Shang-Chia Chen, Yajuan Chen, Craig Lin
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Publication number: 20220215807Abstract: A driving method for driving an electrophoretic display comprising four types of particles, the first type of particles and the third type of particles are positively charged, and the second type of particles and the fourth type of particles are negatively charged, the method comprises the steps of: (i). applying a first driving voltage to the pixel of the electrophoretic display for a first period of time at a first amplitude to drive the pixel to a color state of the fourth type of particle at the viewing side; and (ii). applying a second driving voltage to the pixel of the electrophoretic display for a second period of time, opposite to that of the first driving voltage and a second amplitude smaller than that of the first amplitude, to drive the second type particle towards the non-viewing side.Type: ApplicationFiled: March 25, 2022Publication date: July 7, 2022Inventors: Shang-Chia CHEN, Yajuan CHEN, Craig LIN
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Patent number: 11380274Abstract: A driving method for driving an electrophoretic display comprising four types of particles, the first type of particles and the third type of particles are positively charged, and the second type of particles and the fourth type of particles are negatively charged, the method comprises the steps of: (i). applying a first driving voltage to the pixel of the electrophoretic display for a first period of time at a first amplitude to drive the pixel to a color state of the fourth type of particle at the viewing side; and (ii). applying a second driving voltage to the pixel of the electrophoretic display for a second period of time, opposite to that of the first driving voltage and a second amplitude smaller than that of the first amplitude, to drive the second type particle towards the non-viewing side.Type: GrantFiled: April 29, 2021Date of Patent: July 5, 2022Assignee: E INK CALIFORNIA, LLCInventors: Shang-Chia Chen, Yajuan Chen, Craig Lin
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Publication number: 20210248967Abstract: A driving method for driving an electrophoretic display comprising four types of particles, the first type of particles and the third type of particles are positively charged, and the second type of particles and the fourth type of particles are negatively charged, the method comprises the steps of: (i).applying a first driving voltage to the pixel of the electrophoretic display for a first period of time at a first amplitude to drive the pixel to a color state of the fourth type of particle at the viewing side; and (ii).applying a second driving voltage to the pixel of the electrophoretic display for a second period of time, opposite to that of the first driving voltage and a second amplitude smaller than that of the first amplitude, to drive the second type particle towards the non-viewing side.Type: ApplicationFiled: April 29, 2021Publication date: August 12, 2021Inventors: Shang-Chia CHEN, Yajuan CHEN, Craig LIN
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Patent number: 11062663Abstract: A driving method for driving an electrophoretic display comprising four types of particles, the first type of particles and the third type of particles are positively charged, and the second type of particles and the fourth type of particles are negatively charged, the method comprises the steps of: (i). applying a first driving voltage to the pixel of the electrophoretic display for a first period of time at a first amplitude to drive the pixel to a color state of the fourth type of particle at the viewing side; and (ii). applying a second driving voltage to the pixel of the electrophoretic display for a second period of time, opposite to that of the first driving voltage and a second amplitude smaller than that of the first amplitude, to drive the second type particle towards the non-viewing side.Type: GrantFiled: November 25, 2019Date of Patent: July 13, 2021Assignee: E INK CALIFORNIA, LLCInventors: Shang-Chia Chen, Yajuan Chen, Craig Lin
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Publication number: 20200175929Abstract: A driving method for driving an electrophoretic display comprising four types of particles, the first type of particles and the third type of particles are positively charged, and the second type of particles and the fourth type of particles are negatively charged, the method comprises the steps of: (i). applying a first driving voltage to the pixel of the electrophoretic display for a first period of time at a first amplitude to drive the pixel to a color state of the fourth type of particle at the viewing side; and (ii). applying a second driving voltage to the pixel of the electrophoretic display for a second period of time, opposite to that of the first driving voltage and a second amplitude smaller than that of the first amplitude, to drive the second type particle towards the non-viewing side.Type: ApplicationFiled: November 25, 2019Publication date: June 4, 2020Inventors: Shang-Chia CHEN, Yajuan CHEN, Craig LIN
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Patent number: 10535312Abstract: A method for driving a display having a plurality of pixels, where each pixel is capable of displaying a first color or a second color and is sandwiched between a first electrode and a pixel electrode, the method including applying a driving sequence which includes: (a) for a first time period, applying a first voltage potential between the first electrode and each of the pixel electrodes of a first group of pixels, and applying no voltage potential between the first electrode and each of the pixel electrodes of a second group of pixels of the second color, thereby causing the display device to display an image of the first color with a background of the second color; and (b) for a second time period, applying no voltage potential between the first electrode and each of the pixel electrodes of the first group of pixels, and applying a second voltage potential to each of the pixel electrodes corresponding to the second group of pixels, to clear the onetime image created in step (a).Type: GrantFiled: May 22, 2018Date of Patent: January 14, 2020Assignee: E INK CALIFORNIA, LLCInventors: Robert A. Sprague, Andrew Ho, Yajuan Chen, HongMei Zang, Jialock Wong, Chein Wang
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Publication number: 20180277045Abstract: A method for driving a display having a plurality of pixels, where each pixel is capable of displaying a first color or a second color and is sandwiched between a first electrode and a pixel electrode, the method including applying a driving sequence which includes: (a) for a first time period, applying a first voltage potential between the first electrode and each of the pixel electrodes of a first group of pixels, and applying no voltage potential between the first electrode and each of the pixel electrodes of a second group of pixels of the second color, thereby causing the display device to display an image of the first color with a background of the second color; and (b) for a second time period, applying no voltage potential between the first electrode and each of the pixel electrodes of the first group of pixels, and applying a second voltage potential to each of the pixel electrodes corresponding to the second group of pixels, to clear the onetime image created in step (a).Type: ApplicationFiled: May 22, 2018Publication date: September 27, 2018Inventors: Robert A. SPRAGUE, Andrew HO, Yajuan CHEN, HongMei ZANG, Jialock WONG, Chein WANG
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Publication number: 20180191069Abstract: An NFC antenna includes: at least two coils, where the at least two coils are disposed separately and are connected in series or in parallel to form an antenna circuit; at least one substrate, where the at least two coils are disposed on the at least one substrate, and two neighboring coils of the at least two coils are spaced by a substrate of the at least one substrate, projections of the two neighboring coils on the substrate of the at least one substrate at least partially overlap, the at least one substrate is provided with feed points connected to the antenna circuit, and a resonant frequency of the antenna circuit is 15-30 MHz.Type: ApplicationFiled: June 14, 2016Publication date: July 5, 2018Inventors: Yajuan Chen, Munyong Choi, Faping Wang
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Patent number: 10002575Abstract: 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: GrantFiled: May 6, 2016Date of Patent: June 19, 2018Assignee: E INK CALIFORNIA, LLCInventors: Robert A. Sprague, Andrew Ho, Yajuan Chen, HongMei Zang, Jialock Wong, Chein Wang
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Patent number: 9954583Abstract: A mobile terminal and a NFC antenna are provided. The mobile terminal includes: a terminal body, including a rear surface defined with a rear longitudinal centerline and a rear transverse centerline; near field communication antenna, disposed on the rear surface of the terminal body; wherein at least one of the rear longitudinal centerline and the rear transverse centerline pass through the near field communication antenna, and the near field communication antenna is disposed asymmetrically to the at least one of the rear longitudinal centerline and the rear transverse centerline. The mobile terminal according to the present disclosure shows a lower deviation of the resonance frequency when operating the P2P networking, and also shows high communication sensitivity, a high communication success rate, a strong communication capability, etc.Type: GrantFiled: November 25, 2014Date of Patent: April 24, 2018Assignee: BYD COMPANY LIMITEDInventors: Yajuan Chen, Jiangang Zhou, Dajun Chen
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Publication number: 20170085301Abstract: A mobile terminal and a NFC antenna are provided. The mobile terminal includes: a terminal body, including a rear surface defined with a rear longitudinal centerline and a rear transverse centerline; near field communication antenna, disposed on the rear surface of the terminal body; wherein at least one of the rear longitudinal centerline and the rear transverse centerline pass through the near field communication antenna, and the near field communication antenna is disposed asymmetrically to the at least one of the rear longitudinal centerline and the rear transverse centerline. The mobile terminal according to the present disclosure shows a lower deviation of the resonance frequency when operating the P2P networking, and also shows high communication sensitivity, a high communication success rate, a strong communication capability, etc.Type: ApplicationFiled: November 25, 2014Publication date: March 23, 2017Inventors: Yajuan CHEN, Jiangang ZHOU, Dajun CHEN
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Patent number: 9541814Abstract: The present invention is directed to a color display device in which each pixel can display at least five high-quality color states, and an electrophoretic fluid for such an electrophoretic display. In one aspect, the different types of particles exhibit different levels of attraction force to display different color states. In another aspect, the different types of particles exhibit different levels of mobility in different driving voltage ranges to display different color states.Type: GrantFiled: February 19, 2015Date of Patent: January 10, 2017Assignee: E INK CALIFORNIA, LLCInventors: Craig Lin, Ming Wang, Hui Du, Xiaojia Zhang, Yu Li, Roman Ivanov, Yajuan Chen
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Publication number: 20160335956Abstract: 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: ApplicationFiled: May 6, 2016Publication date: November 17, 2016Inventors: Robert A. SPRAGUE, Andrew HO, Yajuan CHEN, HongMei ZANG, Jialock WONG, Chein WANG
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Patent number: 9490530Abstract: A NFC antenna assembly and a mobile communication device are provided. The NFC antenna assembly including: a shell, a connecting device and an antenna circuit, the connecting device includes a female connector and a male connector configured to connect with the female connector via a snap-fit connection, and the antenna circuit formed on the shell and the male connector and defining first and second ends which are adapted to electrically connect with the female connector via the male connector.Type: GrantFiled: May 27, 2014Date of Patent: November 8, 2016Assignee: BYD Company LimitedInventors: Yajuan Chen, Jiangang Zhou, Dajun Chen
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Publication number: 20160306081Abstract: The present invention relates to the technical field of display, in particular to a prism film, a method for manufacturing the prism film, and a liquid crystal display device. The prism film comprises a prism film substrate and a polarizing layer; an upper surface of the prism film substrate is a prism surface, a lower surface of the prism film substrate is a bonding surface; the polarizing layer is formed on the bonding surface of the prism film substrate. In such a manner, the poor attachment problems of attaching a polarizing sheet on a liquid crystal cell in the manufacturing technology of a liquid crystal panel can be avoided; meanwhile the problem of the polarizing sheet being scratched during assembling the liquid crystal panel in other processes can also be avoided.Type: ApplicationFiled: March 16, 2015Publication date: October 20, 2016Applicant: BOE TECHNOLOGY GROUP CO., LTD.Inventors: Hongyan Xing, Yanyan Yin, Ziwei Cui, Jing Xue, Hao Wu, Yajuan Chen
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Patent number: 9373289Abstract: 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: GrantFiled: August 28, 2012Date of Patent: June 21, 2016Assignee: E INK CALIFORNIA, LLCInventors: Robert Sprague, Andrew Ho, Yajuan Chen, Hongmei Zang, Jialock Wong, Chein Wang
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Publication number: 20160126615Abstract: A NFC antenna assembly and a mobile communication device are provided. The NFC antenna assembly including: a shell, a connecting device and an antenna circuit, the connecting device includes a female connector and a male connector configured to connect with the female connector via a snap-fit connection, and the antenna circuit formed on the shell and the male connector and defining first and second ends which are adapted to electrically connect with the female connector via the male connector.Type: ApplicationFiled: May 27, 2014Publication date: May 5, 2016Inventors: Yajuan CHEN, Jiangang ZHOU, Dajun CHEN
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Patent number: 9171508Abstract: 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: GrantFiled: April 11, 2014Date of Patent: October 27, 2015Assignee: E Ink California, LLCInventors: Robert A. Sprague, Wanheng Wang, Yajuan Chen, Andrew Ho, Bryan Hans Chan, Jialock Wong, HongMei Zang
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Publication number: 20150234250Abstract: The present invention is directed to a color display device in which each pixel can display at least five high-quality color states, and an electrophoretic fluid for such an electrophoretic display. In one aspect, the different types of particles exhibit different levels of attraction force to display different color states. In another aspect, the different types of particles exhibit different levels of mobility in different driving voltage ranges to display different color states.Type: ApplicationFiled: February 19, 2015Publication date: August 20, 2015Inventors: Craig LIN, Ming Wang, Hui Du, Xiaojia Zhang, Yu Li, Roman Ivanov, Yajuan Chen