Patents by Inventor Dachuan ZHAO

Dachuan ZHAO 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).

  • Publication number: 20240139110
    Abstract: A sleep-regulating tablet allowing release by stages and a preparation method thereof are provided. The tablet structurally consists of a drug-containing delayed-release tablet core, a drug-free stomach-soluble coating, a drug-free enteric coating, a drug-containing immediate-release shell, and a shell stomach-soluble coating sequentially from inside to outside. An ideal dual-stage timed drug release mode may be realized, and is especially suitable for a sleep-regulating drug, such as ramelteon.
    Type: Application
    Filed: August 16, 2022
    Publication date: May 2, 2024
    Applicant: OVERSEAS PHARMACEUTICALS, LTD.
    Inventors: Xiaoguang WEN, Jingya WANG, Dachuan ZHAO, Jun FAN, Chenliang ZHANG, Peipei WANG
  • Publication number: 20230210779
    Abstract: An ibuprofen controlled-release tablet and a method for preparing same are provided. The controlled-release tablet is composed of a drug-containing immediate-release layer and a drug-containing sustained-release layer, wherein a mass of ibuprofen in the drug-containing sustained-release layer is greater than a mass of ibuprofen in the drug-containing immediate-release layer, and a ratio of the mass of the ibuprofen in the drug-containing sustained-release layer to the mass of the ibuprofen in the drug-containing immediate-release layer is ?7. The tablet of the present disclosure has an effective analgesic effect for 24 h after administration.
    Type: Application
    Filed: March 8, 2023
    Publication date: July 6, 2023
    Applicant: OVERSEAS PHARMACEUTICALS, LTD.
    Inventors: Xiaoguang WEN, Xiaofeng HUANG, Dachuan ZHAO, Jun FAN, Chenliang ZHANG, Peipei WANG, Min LI
  • Patent number: 11295550
    Abstract: An image processing method comprises: acquiring an actual image of a specified target from a video stream collected by a camera; identifying an area not shielded by the VR HMD and an area shielded by the VR HMD of the face of the specified target from the actual image, and acquiring first facial image data corresponding to the area not shielded; obtaining second facial image data matching the first facial image data according to the first facial image data and a preset facial expression model, wherein the second facial image data correspond to the area shielded; and fusing the first facial image data and the second facial image data to generate a composite image. An image processing device comprises a first acquiring unit, an identifying unit, a second acquiring unit and a generating unit, and is for performing the steps of the method described above.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: April 5, 2022
    Inventors: Tianrong Dai, Yuge Zhu, Dachuan Zhao, Xiang Chen
  • Publication number: 20210374390
    Abstract: An image processing method comprises: acquiring an actual image of a specified target from a video stream collected by a camera; identifying an area not shielded by the VR HMD and an area shielded by the VR HMD of the face of the specified target from the actual image, and acquiring first facial image data corresponding to the area not shielded; obtaining second facial image data matching the first facial image data according to the first facial image data and a preset facial expression model, wherein the second facial image data correspond to the area shielded; and fusing the first facial image data and the second facial image data to generate a composite image. An image processing device comprises a first acquiring unit, an identifying unit, a second acquiring unit and a generating unit, and is for performing the steps of the method described above.
    Type: Application
    Filed: June 26, 2018
    Publication date: December 2, 2021
    Inventors: Tianrong DAI, Yuge ZHU, Dachuan ZHAO, Xiang CHEN
  • Publication number: 20210279504
    Abstract: Disclosed are a method and an apparatus for processing feature point matching result, the first image and the second image are placed reversely, and the matching feature point pair between the first image and the second image is determined by using the feature point matching algorithm; the straight-line equation between each of the feature point pair is made mathematically, and the intersection between each straight line and other straight line is determined; the valid intersection group and the geometric center point thereof are determined according to the distance between each of the intersection and other intersection; and the judgment area of the feature point pair is determined according to the geometric center point, and whether the feature point pair is a correct matching result or not is determined according to whether a straight line between the feature point pair passes through the judgment area or not.
    Type: Application
    Filed: July 24, 2018
    Publication date: September 9, 2021
    Applicant: GOERTEK INC.
    Inventors: Weiyu CAO, Xiang CHEN, Dachuan ZHAO
  • Patent number: 11106422
    Abstract: A method for processing display data comprises: the host divides the display area into a central area and an edge area according to the field of view of a head-mounted display; segments each frame of the display data into first display data corresponding to the central area and second display data corresponding to the edge area; processes the first display data and the second display data according to a first transmission factor and a second transmission factor to obtain first transmission data and second transmission data and sends them to the head-mounted display; and the head-mounted display performs image reconstruction to the received first transmission data and second transmission data, to obtain the displayed image corresponding to the frame of display data, and outputs and display it.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: August 31, 2021
    Assignee: GOERTEK INC.
    Inventors: Tianrong Dai, Yuge Zhu, Dachuan Zhao, Xiang Chen
  • Patent number: 11100361
    Abstract: Disclosed are a method and an apparatus for processing feature point matching result, the first image and the second image are placed reversely, and the matching feature point pair between the first image and the second image is determined by using the feature point matching algorithm; the straight-line equation between each of the feature point pair is made mathematically, and the intersection between each straight line and other straight line is determined; the valid intersection group and the geometric center point thereof are determined according to the distance between each of the intersection and other intersection; and the judgment area of the feature point pair is determined according to the geometric center point, and whether the feature point pair is a correct matching result or not is determined according to whether a straight line between the feature point pair passes through the judgment area or not.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: August 24, 2021
    Assignee: GOERTEK INC.
    Inventors: Weiyu Cao, Xiang Chen, Dachuan Zhao
  • Patent number: 10915168
    Abstract: An input method and apparatus of a device. The method includes: tracking and recording movement of an eyeball gaze point of a user on a display screen of the device, to obtain a current eyeball gaze point movement trajectory; judging whether the current eyeball gaze point movement trajectory matches with a preset eyeball gaze point movement trajectory in a movement trajectory database; wherein the preset eyeball gaze point movement trajectories indicate paths of the movement of the eyeball gaze point on the display screen according to a preset length range within a preset time period; if matched, determining a corresponding input instruction by using the matched eyeball gaze point movement trajectory, and completing an input operation according to the input instruction; and if not matched, not conducting an input operation. The input method and apparatus of a device can conduct input according to the eyeball movement of the user.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: February 9, 2021
    Assignee: GOERTEK INC.
    Inventors: Tianrong Dai, Yuge Zhu, Dachuan Zhao, Xiang Chen
  • Patent number: 10897530
    Abstract: An input method, device and system applied to a mobile smart terminal. The method includes: establishing communication connection with a virtual reality device; collecting input information of a user on the mobile smart terminal; and generating a corresponding operating instruction according to the input information and a corresponding matching relationship between preset instruction and input information in a preset instruction database, and sending the generated operating instruction to the virtual reality device, to enable the virtual reality device to execute a corresponding operation according to the operating instruction. An input device and an input system corresponding to the method are also provided.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: January 19, 2021
    Assignee: Goertek Inc.
    Inventors: Tianrong Dai, Yuge Zhu, Dachuan Zhao, Xiang Chen
  • Publication number: 20200204783
    Abstract: A method and device for processing image data are disclosed.
    Type: Application
    Filed: May 18, 2018
    Publication date: June 25, 2020
    Applicant: Goertek Inc.
    Inventors: Tianrong DAI, Yuge ZHU, Dachuan ZHAO, Xiang CHEN
  • Patent number: 10645299
    Abstract: The present application provides a method for tracking and shooting a moving target and a tracking device, firstly, feature points of a template image corresponding to each shooting angle is extracted in advance, after that, only a feature point of a currently shot target image needs to be calculated when matching, and then the feature points of the target image is matched with the feature points of the template image corresponding to each shooting angle, the shooting angel corresponding to the matched template image is determined as the shooting angle of the currently shot target image; if the shooting angel of the currently shot target image does not coincide with the preset shooting angle of the target, the tracking device is moved to track and shoot the target, so that the shooting angel of the target coincides with the preset shooting angle of the target, greatly reducing the calculation amount of the detection and matching of the feature point and improving the real-time performance of the tracking and
    Type: Grant
    Filed: July 31, 2017
    Date of Patent: May 5, 2020
    Assignee: GOERTEK INC.
    Inventors: Weiyu Cao, Xiang Chen, Dachuan Zhao
  • Publication number: 20200133607
    Abstract: A method for processing display data comprises: the host divides the display area into a central area and an edge area according to the field of view of a head-mounted display; segments each frame of the display data into first display data corresponding to the central area and second display data corresponding to the edge area; processes the first display data and the second display data according to a first transmission factor and a second transmission factor to obtain first transmission data and second transmission data and sends them to the head-mounted display; and the head-mounted display performs image reconstruction to the received first transmission data and second transmission data, to obtain the displayed image corresponding to the frame of display data, and outputs and display it.
    Type: Application
    Filed: December 31, 2019
    Publication date: April 30, 2020
    Applicant: GOERTEK INC.
    Inventors: Tianrong DAI, Yuge ZHU, Dachuan ZHAO, Xiang CHEN
  • Patent number: 10620903
    Abstract: A method for processing display data and a virtual reality device. The method comprises: the host divides the display area into a central area and an edge area according to the field of view of a head-mounted display; segments each frame of the display data into first display data corresponding to the central area and second display data corresponding to the edge area; processes the first display data and the second display data according to a first transmission factor and a second transmission factor to obtain first transmission data and second transmission data and sends them to the head-mounted display; and the head-mounted display performs image reconstruction to the received first transmission data and second transmission data, to obtain the displayed image corresponding to the frame of display data, and outputs and display it. The virtual reality device comprises the above host and head-mounted display.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: April 14, 2020
    Assignee: GOERTEK INC.
    Inventors: Tianrong Dai, Yuge Zhu, Dachuan Zhao, Xiang Chen
  • Publication number: 20200111345
    Abstract: A user behavior monitoring method and a wearable device are provided. The method comprises: providing an inertial sensor in a wearable device; at the beginning of each data indicator acquiring phases, after a user has worn the wearable device, monitoring and collecting historical movement data of the user in a preset statistical period by the inertial sensor, and acquiring a predictive indicator according to a changing trend of the historical movement data; in real-time monitoring, collecting real-time movement data of the user, and judging whether the user has an abnormal behavior according to the real-time movement data, the predictive indicator acquired in the data indicator acquiring phase and a preset strategy; and sending an alarm notification when it is determined that the user has an abnormal behavior. The device can perform customized and high-accuracy behavior monitoring with respect to different users.
    Type: Application
    Filed: July 21, 2017
    Publication date: April 9, 2020
    Inventors: Yan Li, Dachuan Zhao, Xin Zhao, Waner Liu
  • Publication number: 20190354171
    Abstract: An input method and apparatus of a device. The method includes: tracking and recording movement of an eyeball gaze point of a user on a display screen of the device, to obtain a current eyeball gaze point movement trajectory; judging whether the current eyeball gaze point movement trajectory matches with a preset eyeball gaze point movement trajectory in a movement trajectory database; wherein the preset eyeball gaze point movement trajectories indicate paths of the movement of the eyeball gaze point on the display screen according to a preset length range within a preset time period; if matched, determining a corresponding input instruction by using the matched eyeball gaze point movement trajectory, and completing an input operation according to the input instruction; and if not matched, not conducting an input operation. The input method and apparatus of a device can conduct input according to the eyeball movement of the user.
    Type: Application
    Filed: November 16, 2017
    Publication date: November 21, 2019
    Applicant: Goertek Inc.
    Inventors: Tianrong DAI, Yuge ZHU, Dachuan ZHAO, Xiang CHEN
  • Publication number: 20190335034
    Abstract: An input method, device and system applied to a mobile smart terminal. The method includes: establishing communication connection with a virtual reality device; collecting input information of a user on the mobile smart terminal; and generating a corresponding operating instruction according to the input information and a corresponding matching relationship between preset instruction and input information in a preset instruction database, and sending the generated operating instruction to the virtual reality device, to enable the virtual reality device to execute a corresponding operation according to the operating instruction. An input device and an input system corresponding to the method are also provided.
    Type: Application
    Filed: November 15, 2017
    Publication date: October 31, 2019
    Applicant: Goertek Inc.
    Inventors: Tianrong DAI, Yuge ZHU, Dachuan ZHAO, Xiang CHEN
  • Publication number: 20190281224
    Abstract: The present application provides a method for tracking and shooting a moving target and a tracking device, firstly, feature points of a template image corresponding to each shooting angle is extracted in advance, after that, only a feature point of a currently shot target image needs to be calculated when matching, and then the feature points of the target image is matched with the feature points of the template image corresponding to each shooting angle, the shooting angel corresponding to the matched template image is determined as the shooting angle of the currently shot target image; if the shooting angel of the currently shot target image does not coincide with the preset shooting angle of the target, the tracking device is moved to track and shoot the target, so that the shooting angel of the target coincides with the preset shooting angle of the target, greatly reducing the calculation amount of the detection and matching of the feature point and improving the real-time performance of the tracking and
    Type: Application
    Filed: July 31, 2017
    Publication date: September 12, 2019
    Applicant: Goertek Inc.
    Inventors: Weiyu CAO, Xiang CHEN, Dachuan ZHAO
  • Publication number: 20190235817
    Abstract: A method for processing display data and a virtual reality device. The method comprises: the host divides the display area into a central area and an edge area according to the field of view of a head-mounted display; segments each frame of the display data into first display data corresponding to the central area and second display data corresponding to the edge area; processes the first display data and the second display data according to a first transmission factor and a second transmission factor to obtain first transmission data and second transmission data and sends them to the head-mounted display; and the head-mounted display performs image reconstruction to the received first transmission data and second transmission data, to obtain the displayed image corresponding to the frame of display data, and outputs and display it. The virtual reality device comprises the above host and head-mounted display.
    Type: Application
    Filed: November 17, 2017
    Publication date: August 1, 2019
    Applicant: Goertek Inc.
    Inventors: Tianrong Dai, Yuge Zhu, Dachuan Zhao, Xiang Chen