公开(公告)号：US20210272802A1

公开(公告)日：2021-09-02

申请号：US17254102

申请日：2018-12-19

Applicant: South China Normal University

Inventor： Richard Notzel ,  Peng Wang ,  Stefano Sanguinetti ,  Guofu Zhou

IPC: H01L21/02

Abstract: Provided is a nanowire array, in which a plurality of nanowires are densely packed and in contact with each other via side walls to form a three-dimensional, compact layer structure, wherein the plurality of nanowires are formed from InGaN-based material. Also provided is an optoelectronic device comprising the nanowire array which is epitaxially grown on a surface of a substrate (12). Further provided are methods for preparing the nanowire array and the optoelectronic device.

公开(公告)号：US11079631B2

公开(公告)日：2021-08-03

申请号：US16495787

申请日：2018-05-04

Applicant: South China Normal University ,  Shenzhen Guohua Optoelectronics Co., Ltd.

Inventor： Guofu Zhou ,  Laurens De Haan ,  Pei Zhang ,  Wei Zhao

IPC: G02F1/1337 ,  C09K19/20 ,  C09K19/38 ,  C09D5/33 ,  C09K19/04

Abstract: A preparation method for a temperature-responsive light reflecting coating is provided comprising: forming a main chain cholesteric phase liquid crystal polymer by a polymerization reaction between an acrylate liquid crystal and an amine, and coating the main chain cholesteric phase liquid crystal polymer on a substrate to form a light reflecting coating, wherein the acrylate comprises a chiral acrylate, and the reflection wavelength of the reflecting coating is determined by the content of the chiral acrylate liquid crystal and the polymerization degree of the main chain cholesteric phase liquid crystal polymer formed. The method may further comprise cross-linking the main chain cholesteric phase liquid crystal polymer to obtain a polymer network so as to form a solid coating. The present disclosure further provides a temperature-responsive light reflecting coating. The preparation of the main chain cholesteric phase liquid crystal polymer of the present disclosure requires only a simple thermally-driven polymerization reaction.

公开(公告)号：US10942402B2

公开(公告)日：2021-03-09

申请号：US16483804

申请日：2017-11-08

Applicant: SOUTH CHINA NORMAL UNIVERSITY ,  SHENZHEN GUOHUA OPTOELECTRONICS CO., LTD. ,  ACADEMY OF SHENZHEN GUOHUA OPTOELECTRONICS

Inventor： Guofu Zhou ,  Xiaowen Hu ,  Nan Li

IPC: G02F1/1334 ,  G02F1/1347 ,  G02F1/1337 ,  G02F1/137 ,  G02F1/1339

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.

公开(公告)号：US10901278B2

公开(公告)日：2021-01-26

申请号：US16498740

申请日：2018-10-10

Applicant: South China Normal University ,  Shenzhen Guohua Optoelectronics Co., Ltd. ,  Academy of Shenzhen Guohua Optoelectronics

Inventor： Guofu Zhou ,  Xiaowen Hu ,  Wei Zhao ,  Haitao Sun ,  Wenmin Yang ,  Lingling Shui

IPC: G02F1/1347 ,  G02F1/1334 ,  G02F1/137

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. The conversion of the positive liquid crystals in each layer between different states is driven by changing the magnitude of the access voltage of the liquid crystal dimming device according to the present disclosure, thereby realizing the adjustment of blurring to transparent states and color to colorless states of the liquid crystal dimming device, having a good application prospect in the window glass, and home glass window, and the like.

公开(公告)号：US20180286318A1

公开(公告)日：2018-10-04

申请号：US15764228

申请日：2016-04-13

Applicant: Shenzhen Guohua Optoelectronics Co. Ltd ,  South China Normal University ,  Academy of Shenzhen Guohua Optoelectronics

Inventor： Zichuan Yi ,  Li Wang ,  Guofu Zhou

IPC: G09G3/34

CPC classification number: G09G3/344 ,  G09G2310/06 ,  G09G2310/063 ,  G09G2310/065 ,  G09G2310/068 ,  G09G2320/0204 ,  G09G2320/0257

Abstract: A driving method for reducing a ghosting in an electrophoretic display is provided without prolonging driving waveform time and scintillation by improving a driving waveform design. The method comprises four steps: erasing an original image (S1); activating activity of electrophoretic particle (S2); activating electrophoretic particle (S3); and writing a new image (S4). At the electrophoretic particle activating (S3) stage, the electrophoretic particle activating is carried out for a preset duration time (tx), wherein the voltage of the driving waveform is 0V within the preset duration time (tx).

公开(公告)号：US20170082849A1

公开(公告)日：2017-03-23

申请号：US15305640

申请日：2014-04-22

Applicant: SHENZHEN GUOHUA OPTOELECTRONICS CO., LTD. ,  South China Normal University ,  Shenzhen Guohua Optoelectronics Institute

Inventor： Guofu Zhou ,  Robert Andrew Hayes ,  Jan Groenewold

IPC: G02B26/00

CPC classification number: G02B26/005 ,  G02B5/021 ,  G02B5/0284 ,  G02F1/167

Abstract: A display structure having a paper effect. The display structure comprises panel glass (1), a display layer (2) and substrate glass (3), wherein a paper layer (4) is provided under the substrate glass, and the panel glass (1), the display layer (2), the substrate glass (3) and the paper layer (4) are stacked in sequence. Also provided are an electrowetting display structure based on the display structure and a method for manufacturing the display structure having a paper effect. A piece of high-quality paper is placed under a substrate of the existing display structure as a diffuse reflection layer or a diffuse reflector, so as to provide required diffuse reflection and contrast approximate to paper. Compared with vacuum coating, the process is simpler, and avoids the expensive vacuum coating process, thereby greatly reducing manufacturing costs.