Patents Assigned to Academy of Shenzhen Guohua Optoelectronics
  • Patent number: 11835831
    Abstract: An infrared reflection device includes a power supply assembly, a plurality of switches, and two relatively disposed light-transmitting conductive substrates packaging a regulating area. Each of the light-transmitting conductive substrates comprise a light-transmitting substrate and an electrode layer. The regulating area is filled with a liquid crystal mixture; the electrode layers are arranged on opposite surfaces of the two light-transmitting substrates; the electrode layer of at least one of the light-transmitting conductive substrates comprises at least two mutually independent electrode areas; and electrode areas of the same light-transmitting conductive substrate, after being respectively connected in series to the switches, are jointly connected in parallel to the same electrode of the power supply assembly.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: December 5, 2023
    Assignees: SOUTH CHINA NORMAL UNIVERSITY, SHENZHEN GUOHUA OPTOELECTRONICS CO., LTD., ACADEMY OF SHENZHEN GUOHUA OPTOELECTRONICS
    Inventors: Guofu Zhou, Xiaowen Hu, Nan Li
  • Patent number: 11579477
    Abstract: An electrically controlled smart window, which includes two transparent plates arranged oppositely, a power supply component and an in-between light-adjusting area. Hereinto the light-adjusting area is divided into a matrix of light-adjusting units by pixel wall(s), and every units are closely arranged in a grid shape. To the power supply component, an electrode is connected with the pixel wall, and another is localized on the center of light-adjusting unit and did with the transparent plate. Both surface-charged liquid crystal polymer particles and conductive packing fluid are filled into the medium between the two transparent plates. According to the present disclosure, cholesteric liquid crystal polymer microparticles with specific reflection band and surface charges are used as basic reflectors, thereby achieving the significant advantages of being easy to manufacture, low cost, and stable performance, without causing interference to electromagnetic signals.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: February 14, 2023
    Assignees: South China Normal University, Shenzhen Guohua Optoelectronics Co., Ltd., Academy of Shenzhen Guohua Optoelectronics
    Inventors: Guofu Zhou, Hao Li, Nan Li
  • Patent number: 11505745
    Abstract: A use of zwitterionic compound in preparation of dynamic-scattering-mode-based liquid crystal material. A liquid crystal material is also described. Such material contains liquid crystal and dopant, and the dopant is zwitterionic compound. A liquid crystal electro-optical device comprising such liquid crystal compound and the use of such optical device are also described. Zwitterionic compound is used as dopant to induce a stable dynamic scattering mode in liquid crystals.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: November 22, 2022
    Assignees: SHENZHEN GUOHUA OPTOELECTRONICS CO., LTD., ACADEMY OF SHENZHEN GUOHUA OPTOELECTRONICS
    Inventors: Guofu Zhou, Yuanyuan Zhan, Danqing Liu, Albertus Petrus Henricus Johannes Schenning, Dirk Jan Broer
  • Patent number: 11498989
    Abstract: A water-responsive interpenetrating polymer network, a preparation method and use thereof are provided. The water-responsive interpenetrating polymer network comprises an interpenetrating polymer network formed by a cholesteric liquid crystal polymer and a polyionic liquid; wherein the cholesteric liquid crystal polymer is formed by polymerization of a liquid crystal mixture; and the polyionic liquid contains a hydrophilic group or is a hydrophilic salt. The interpenetrating polymer network is water responsive without needs of activation with an alkaline solution, which simplifies the preparation process, and has stable water responsiveness performance after prolonged and/or repeated exposure to water. The water-responsive interpenetrating polymer network can be used to prepare light reflective coatings and reflective devices, and has higher commercial value.
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: November 15, 2022
    Assignees: SOUTH CHINA NORMAL UNIVERSITY;, SHENZHEN GUOHUA OPTOELECTRONICS CO., LTD., ACADEMY OF SHENZHEN GUOHUA OPTOELECTRONICS
    Inventors: Guofu Zhou, Laurens De Haan, Zixuan Deng
  • Patent number: 11256008
    Abstract: Disclosed are a laser protective film and a laser protective device comprising the same. The laser protective film comprises, stackingly disposed: a first liquid crystal polymer layer for reflecting left-hand polarized light, a second liquid crystal polymer layer for reflecting right-hand polarized light, and a third liquid crystal polymer layer for absorbing incident laser. In the above way, the laser protective film of the present disclosure has a large angle of protection, high flexibility. In addition, it is easy to find any damage to the laser protective film of the present disclosure. Moreover, it can make modification to existing equipment. Thus, the present disclosure has a good application prospect in many fields such as laser goggles, window glass and the like.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: February 22, 2022
    Assignees: SOUTH CHINA NORMAL UNIVERSITY ELECTRONIC PAPER DISPLAY INSTITUTE, SHENZHEN GUOHUA OPTOELECTRONICS CO., LTD., ACADEMY OF SHENZHEN GUOHUA OPTOELECTRONICS
    Inventors: Guofu Zhou, Xiaowen Hu, Wei Zhao, Qiumei Nie, Weijie Zeng, Haitao Sun
  • Patent number: 11215811
    Abstract: Disclosed is a drying-wetting separated filling method and a filling apparatus for an electrowetting display device. The filling method comprises filling a non-polar solution into pixel grids on a lower substrate of an electrowetting display device in air, and filling a polar solution to immediately cover the non-polar solution filled after filling the non-polar solution into the pixel grids. Compared with filling the non-polar solution into the polar solution, directly filling the non-polar solution in air has better filling uniformity, easier operation and control. With the method, the fillings of the polar solution and the non-polar solution are easy, having a higher filling efficiency, and no air bubble residue.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: January 4, 2022
    Assignees: SOUTH CHINA NORMAL UNIVERSITY, ACADEMY OF SHENZHEN GUOHUA OPTOELECTRONICS, SHENZHEN GUOHUA OPTOELECTRONICS CO., LTD.
    Inventors: Guofu Zhou, Rui Zhou, Hongwei Jiang, Yuanyuan Guo
  • Patent number: 11181733
    Abstract: A method for preparing an electrowetting display support plate (5), comprising the following steps: preparing a substrate (7) having an electrode layer; preparing a hydrophobic insulating layer (13) and pixel walls (20) on the substrate (7) having an electrode layer, the pixel walls (20) being made of a hydrophilic material; performing plasma etching on the substrate (7) having the pixel walls (20), the power of the plasma etching being 30-1,000 W/m2; and heating the substrate (7) subjected to the plasma etching, so as to recover the hydrophobicity of the hydrophobic insulating layer (13). According to the method, the technical bias that the display support plate (5) being treated by means of the plasma etching would influence the quality of the hydrophobic insulating layer (13) is eliminated.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: November 23, 2021
    Assignees: SOUTH CHINA NORMAL UNIVERSITY, SHENZHEN GUOHUA OPTOELECTRONICS CO., LTD., ACADEMY OF SHENZHEN GUOHUA OPTOELECTRONICS
    Inventors: Guofu Zhou, Hao Wu, Yingying Dou, Fahong Li
  • Publication number: 20210355384
    Abstract: A use of zwitterionic compound in preparation of dynamic-scattering-mode-based liquid crystal material. A liquid crystal material is also described. Such material contains liquid crystal and dopant, and the dopant is zwitterionic compound. A liquid crystal electro-optical device comprising such liquid crystal compound and the use of such optical device are also described. Zwitterionic compound is used as dopant to induce a stable dynamic scattering mode in liquid crystals.
    Type: Application
    Filed: December 28, 2018
    Publication date: November 18, 2021
    Applicants: SHENZHEN GUOHUA OPTOELECTRONICS CO., LTD., ACADEMY OF SHENZHEN GUOHUA OPTOELECTRONICS
    Inventors: Guofu ZHOU, Yuanyuan ZHAN, Danqing LIU, Albertus Petrus Henricus Johannes SCHENNING, Dirk Jan BROER
  • Patent number: 11175436
    Abstract: A dye-doped laser protective film is disclosed, comprising a polymer layer A and a polymer layer B. The polymer molecules in the polymer layer A are arranged in a left-handed helical structure which can reflect a left-handed polarized laser. The polymer molecules in the polymer layer B are arranged in a right-handed helical structure which can reflect a right-handed polarized laser. The combination of the polymer layer having the left-handed helical structure and the polymer layer having the right-handed helical structure can completely reflect circularly polarized light. In addition, the dye can absorb incident laser, so as to expand the protection angle of the laser protective film. The dye-doped laser protective film of the present disclosure has a simple manufacturing process, large protection angle and good flexibility, and can refit existing devices.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: November 16, 2021
    Assignees: South China Normal University, Shenzhen Guohua Optoelectronics Co., Ltd., Academy of Shenzhen Guohua Optoelectronics
    Inventors: Guofu Zhou, Xiaowen Hu, Wei Zhao, Haitao Sun, Qiumei Nie
  • Patent number: 11168256
    Abstract: A liquid crystal mixture and a temperature-responsive infrared reflection device made by using the liquid crystal mixture containing potassium laurate. Infrared light can pass through the device within a non-working temperature range, and a chiral dopant enables potassium laurate to form a cholesteric phase within a working temperature range. The birefringence value of the potassium laurate gradually increases with the increase of temperature between 12.5° C. and 26° C., so that the infrared reflection bandwidth of the device constantly increases. The birefringence value of the potassium laurate gradually decreases with the increase of temperature between 26° C. and 54.5° C., so that the infrared reflection bandwidth of the device constantly decreases. The infrared reflection bandwidth of the infrared reflection device can vary with temperature by adjusting the proportions of the ingredients of the liquid crystal mixture containing potassium laurate.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: November 9, 2021
    Assignees: South China Normal University, Shenzhen Guohua Optoelectronics Co., Ltd., Academy of Shenzhen Guohua Optoelectronics
    Inventors: Guofu Zhou, Xiaowen Hu, Wei Zhao, Weijie Zeng, Chun Ju, Lingling Shui
  • Patent number: 10991322
    Abstract: Provided is a bistable driving method for an electrowetting display, comprising: setting a non-selected voltage for one or more writing rows; switching a row voltage of the one or more writing rows from the non-selected voltage to a selected voltage; applying the digital voltage on at least one column of digital electrodes to be written; switching the row voltage of the one or more writing rows from the selected voltage to the non-selected voltage, and decreasing the digital voltage applied to the at least one column to a voltage less than the opening voltage minus the selected voltage; and applying the steps above to next one or more writing rows until an entire display screen is written.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: April 27, 2021
    Assignees: Academy of Shenzhen Guohua Optoelectronics, Shenzhen Guohua Optoelectronics Co., Ltd.
    Inventors: Guofu Zhou, Weijie Lin, Alexander Victor Henzen
  • Patent number: 10942402
    Abstract: An electric response infrared reflection device and a preparation method thereof. The device comprises three light-transmitting conductive substrates which are oppositely arranged. Two adjacent light-transmitting conductive substrates of the three light-transmitting conductive substrates are respectively packaged to form a first adjusting area and a second adjusting area. Both the first adjusting area and the second adjusting area are filled with liquid crystal layers. Each of the liquid crystal layers comprises a mixed liquid crystal material. The mixed liquid crystal material comprises a chiral nematic phase liquid crystal, a monomer, a photoinitiator, and a chiral dopant. The spiral direction of the chiral nematic phase liquid crystal in the first adjusting area is opposite to the spiral direction of the chiral nematic phase liquid crystal in the second adjusting area, so that the total reflection of an infrared band can be implemented.
    Type: Grant
    Filed: November 8, 2017
    Date of Patent: March 9, 2021
    Assignees: SOUTH CHINA NORMAL UNIVERSITY, SHENZHEN GUOHUA OPTOELECTRONICS CO., LTD., ACADEMY OF SHENZHEN GUOHUA OPTOELECTRONICS
    Inventors: Guofu Zhou, Xiaowen Hu, Nan Li
  • Patent number: 10901278
    Abstract: The present disclosure discloses an electroresponsive liquid crystal dimming device comprising a first light transmitting conductive substrate, a first polymer network stabilized liquid crystal layer, a positive liquid crystal layer, a second polymer network stabilized liquid crystal layer and a second light transmitting conductive substrate which are arranged in sequence; and the first polymer network stabilized liquid crystal layer and the second polymer network stabilized liquid crystal layer reflect the circularly polarized light having the same polarization direction.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: January 26, 2021
    Assignees: South China Normal University, Shenzhen Guohua Optoelecironics Co., Ltd., Academy of Shenzhen Guohua Optoelectronics
    Inventors: Guofu Zhou, Xiaowen Hu, Wei Zhao, Haitao Sun, Wenmin Yang, Lingling Shui
  • Publication number: 20200027407
    Abstract: Provided is a bistable driving method for an electrowetting display, comprising: setting a non-selected voltage for one or more writing lines; switching a line voltage of the one or more writing lines from the non-selected voltage to a selected voltage; applying the digital voltage on at least one column of digital electrodes to be written; switching the line voltage of the one or more writing lines from the selected voltage to the non-selected voltage, and decreasing the digital voltage applied to the at least one column to a voltage less than the opening voltage; and applying the steps above to next one or more writing lines until an entire display screen is written.
    Type: Application
    Filed: November 8, 2017
    Publication date: January 23, 2020
    Applicants: Academy of Shenzhen Guohua Optoelectronics, Shenzhen Guohua Optoelectronics Co., Ltd.
    Inventors: Guofu ZHOU, Weijie LIN, Alexander Victor HENZEN
  • Patent number: 10466471
    Abstract: Three-layer full-color dynamic electronic paper, comprising a substrate, a controller, a first EWOD display layer, a second EWOD display layer and a third EWOD display layer, wherein each of the first, second and third EWOD display layer is comprised of an upper transparent electrode plate, a hydrophobic insulating layer, pixel walls, colored ink, colorless liquid, a lower transparent electrode plate, an encapsulation adhesive, and a driving chip connected to the upper transparent electrode plate and the lower transparent electrode plate respectively; the lower transparent electrode plate of the third EWOD display layer is located above the substrate; the colored ink filled in the first, second and third EWOD display layer is cyan ink, magenta ink and yellow ink, respectively; and, the controller controls voltage waveforms of the three driving chips according to a subtractive color mixture principle of three primary colors for printing, so as to realize full-color displaying.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: November 5, 2019
    Assignees: Shenzhen Guohua Optoelectronics Co., Ltd., Academy of Shenzhen Guohua Optoelectronics, South China Normal University
    Inventors: Guofu Zhou, Fangchao Tian, Zhijie Luo, Weinan Zhang
  • Publication number: 20190318695
    Abstract: A device and method for eliminating an image border of electrophoretic electronic paper includes the following steps: S1, acquiring gray-scale driving waveform information and gray-scale position information, wherein the driving waveform information comprises a level value and a duration corresponding thereof; S2, outputting regulation waveform information based on an termination level value of a first gray scale, a level duration and a starting level value of a second gray scale, wherein the regulation waveform information comprises a level value, an embedding time and an embedding position of a waveform; and S3, modifying the gray-scale driving waveform information based on the regulation waveform information, and controlling an output of a drive electrode based on the modified gray-scale driving waveform information. By using the device and method, an impact of the fringe electric field on movement of electronic paper micro-capsules is eliminated, thus effectively reducing border ghosting.
    Type: Application
    Filed: November 8, 2017
    Publication date: October 17, 2019
    Applicants: SOUTH CHINA NORMAL UNIVERSITY, SHENZHEN GUOHUA OPTOELECTRONICS CO., LTD., ACADEMY OF SHENZHEN GUOHUA OPTOELECTRONICS
    Inventors: Guofu ZHOU, Li WANG, Pengfei BAI, Zichuan YI
  • Patent number: 10310354
    Abstract: Disclosed is an electrofluidic support plate and a method for preparing the same, and an electrofluidic device comprising the support plate. The method comprises the following steps of: providing a substrate which has a surface provided with an electrode layer; arranging a first amorphous fluoropolymer layer on the surface of the substrate, and carrying out hydrophilic modification on a surface of the amorphous fluoropolymer layer; arranging pixel walls on the amorphous fluoropolymer layer after hydrophilic modification; arranging a second amorphous fluoropolymer layer which is a hydrophobic layer; the second amorphous fluoropolymer layer covering all surfaces of the pixel walls and a groove area encircled by the pixel walls; filling the groove area encircled by the pixel walls with a protective material; removing the second amorphous fluoropolymer layer not covered by the protective material and on a top of the pixel walls; and removing the protective material.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: June 4, 2019
    Assignees: South China Normal University, Academy of Shenzhen Guohua Optoelectronics, Shenzhen Guohua Optoelectronics Co., Ltd.
    Inventors: Guofu Zhou, Hao Wu, Fahong Li, Robert Andrew Hayes
  • Publication number: 20180200801
    Abstract: present invention relates to a technical field of nano-silver particles, and discloses a preparation method for nano-silver particles. The preparation method includes following steps: 1) silver nitrate and water soluble stabilizer are weighed and put into a reaction vessel; 2) water is added into the reaction vessel; 3) in an illuminated environment at room temperature under atmospheric pressure, the solution in the reaction vessel is electromagnetically stirred until the solution in the reaction vessel turns red, and the nano-silver particles are formed in the solution; 4) after the reaction of the solution in the reaction vessel in step 3), the reaction vessel with the solution is kept out of light and the nano-silver particles are then extracted from the solution.
    Type: Application
    Filed: May 18, 2016
    Publication date: July 19, 2018
    Applicants: Shenzhen Guohua Optoelectronics Co., Ltd., Academy of Shenzhen Guohua Optoelectronics, G.H.S Advanced Equipment Technology Co.,Ltd.
    Inventors: Guofu ZHOU, Nan LI, Lingling SHUI, Mingliang JIN