公开(公告)号：US11579477B2

公开(公告)日：2023-02-14

申请号：US16491086

申请日：2017-11-15

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

Inventor： Guofu Zhou ,  Hao Li ,  Nan Li

IPC: G02F1/1333 ,  G02F1/166 ,  G02B26/02 ,  G02F1/167 ,  C09K19/38 ,  G02F1/1675 ,  C09K19/04

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.

公开(公告)号：US20230043406A1

公开(公告)日：2023-02-09

申请号：US17790445

申请日：2020-11-12

Applicant: SOUTH CHINA NORMAL UNIVERSITY

Inventor： Han ZHANG ,  Weiwei ZHU ,  Songbin YE ,  Baoxian YU

IPC: A61B5/00

Abstract: A noninvasive method and system for sleep apnea detection is disclosed. The method includes the following steps: acquiring vital sign signals of a sleeping user; performing structured processing on the vital sign signals of the user to remove invalid signals to obtain a set of valid vital sign signals; extracting multi-dimensional morphological features from a sleep respiratory signal and performing feature training on an initial model of a classifier by means of the multi-dimensional morphological features so as to obtain a sleep breathing detection model; and inputting the set of valid vital sign signals into the sleep breathing detection model and performing signal processing to obtain predicted probability of the user suffering from sleep apnea. As a result, data relating to the probability of a user suffering from sleep apnea can be more accurately obtained, thereby facilitating the determination of whether a sleep apnea event occurs during sleep.

公开(公告)号：US11521852B2

公开(公告)日：2022-12-06

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: H01L21/00 ,  H01L21/02

Abstract: Provided are a method for preparing an InGaN-based epitaxial layer on a Si substrate (12), as well as a silicon-based InGaN epitaxial layer prepared by the method. The method may include the steps of: 1) directly growing a first InGaN-based layer (11) on a Si substrate (12); and 2) growing a second InGaN-based layer on the first InGaN-based layer (11).

公开(公告)号：US11498989B2

公开(公告)日：2022-11-15

申请号：US16498727

申请日：2018-12-28

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

Inventor： Guofu Zhou ,  Laurens De Haan ,  Zixuan Deng

IPC: C08F220/06 ,  C08F2/44 ,  C08F2/50 ,  C08F220/34 ,  C08F230/02 ,  C09D133/02 ,  C09D133/14 ,  C09D143/02 ,  C09K19/38

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.

公开(公告)号：US20220254939A1

公开(公告)日：2022-08-11

申请号：US17629343

申请日：2019-09-11

Applicant: SOUTH CHINA NORMAL UNIVERSITY

Inventor： Richard NOTZEL

IPC: H01L29/885 ,  H01L29/20 ,  H01L21/02 ,  H01L29/66 ,  H02M7/06

Abstract: An epitaxial wafer, a method of manufacturing the epitaxial wafer, a diode, and a current rectifier are provided. The epitaxial wafer comprises a Si substrate layer; an insulating layer formed on the Si substrate layer; and a nitride semiconductor layer formed on a surface of the insulating layer facing away from the Si substrate layer; wherein the insulating layer has a thickness configured such that under a forward bias voltage, the insulating layer may allow electrons and holes to pass from one side to the other side of the insulating layer via quantum tunneling so as to allow a forward current flow.

公开(公告)号：US11256008B2

公开(公告)日：2022-02-22

申请号：US16498760

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 ,  Qiumei Nie ,  Weijie Zeng ,  Haitao Sun

IPC: G02B5/08 ,  G02B5/00

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.

公开(公告)号：US20220003607A1

公开(公告)日：2022-01-06

申请号：US17298615

申请日：2020-03-30

Applicant: SOUTH CHINA NORMAL UNIVERSITY

Inventor： Xiaoxu Lv ,  Chengxin Zhou ,  Liyun Zhong ,  Qinwen Ning ,  Shengde Liu

IPC: G01J3/45 ,  G01J3/02 ,  G01J3/12 ,  G02F1/13363

Abstract: A differential interference imaging system capable of rapidly changing shear direction and amount includes: a light source (101), a filter (102), a polarizer (103), a sample stage (104), an infinite imaging microobjective (105), a tube lens (106), a shear component, an analyzer (113), and an image sensor (114). After the light intensity and a polarization direction is adjusted, the linearly polarized light passes through a transparent sample, to be collected by the infinite imaging microobjective (105) and to implement imaging through the tube lens (106). An imaging beam is divided into two linearly polarized light fields which are perpendicular to each other in the polarization directions and have tiny shear amount, then they are further combined into an interference light filed by the analyzer (103) to form a differential interference image in the image sensor (114). The system may be flexibly assembled, is simple in structure and easy to implement.

公开(公告)号：US11175436B2

公开(公告)日：2021-11-16

申请号：US16499035

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 ,  Qiumei Nie

IPC: G02B5/00 ,  C08F222/20 ,  C08K5/08 ,  C08K5/103 ,  C09B1/00 ,  G02B1/04 ,  C08J7/04

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. Thus, the dye-doped laser protective film of the present disclosure has a good application prospect in many fields such as laser goggles, window films and the like.

公开(公告)号：US11111317B2

公开(公告)日：2021-09-07

申请号：US16770983

申请日：2018-12-12

Applicant: SOUTH CHINA NORMAL UNIVERSITY

Inventor： Ruqiang Huang ,  Jingwen Zhang ,  Jinghui Wang ,  Qian Wang ,  Linlin Gao

IPC: C08B37/00 ,  A61P19/06 ,  A61K31/715

Abstract: A Cordyceps militaris medium polysaccharide, a method for separating and purifying same, and the use thereof, wherein the polysaccharide comprises the following monosaccharides in mole percentages: 0.11% ribose, 0.11% rhamnose, 0.45% arabinose, 0.13% xylose, 14.50% mannose, 83.96% glucose, and 0.73% galactose. The extraction method does not affect the biological activity of the Cordyceps militaris medium polysaccharide P1; the obtained purified polysaccharide P1 has high purity and stable properties, and has significant effects on resistance to oxidation, lowering uric acid and bacteriostasis, which are beneficial to human metabolism; due to the low cost, the purified polysaccharide P1 can be further used in the development of health products, drugs and cosmetics.

公开(公告)号：US20210166390A1

公开(公告)日：2021-06-03

申请号：US16794897

申请日：2020-02-19

Applicant: South China Normal University ,  Guangmeiyuan R & D Center, Key Laboratory of Insect Developmental Biology and Applied Technology, So

Inventor： Na LI ,  Sheng LI

IPC: G06T7/00 ,  G06T7/246 ,  G06T7/277 ,  G06T7/11 ,  G06T7/187 ,  G06T7/73 ,  G06N3/08 ,  G06N20/00

Abstract: A method, apparatus and storage medium for analyzing insect feeding behaviors are disclosed. The method comprises detecting insects in a video recording feeding activities of the insects by deep learning using a neural network to obtain a detection result, obtaining insect trajectories according to the detection result, and obtaining an analysis result according to the insect trajectories. According to the present disclosure, the detection and analysis are performed on a pre-recorded video by deep learning using a neural network, and then the insect trajectories and an analysis result are obtained according to the detection result, thus manual observation, recording and analysis are not needed, the efficiency is high. Besides, subjective assumptions are eliminated for higher accuracy. The present disclosure, as a method, apparatus and storage medium for analyzing insect feeding behaviors, can be widely used in the field of insect behavior analysis.