Patents by Inventor Po Han Chang

Po Han Chang 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).

  • Patent number: 12046072
    Abstract: This disclosure describes systems and techniques for synchronizing cameras and tagging images for face authentication. For face authentication by a facial recognition model, a dual infrared camera may generate an image stream by alternating between capturing a “flood image” and a “dot image” and tagging each image with metadata that indicates whether the image is a flood or a dot image. Accurately tagging images can be difficult due to dropped frames and errors in metadata tags. The disclosed systems and techniques provide for the improved synchronization of cameras and tagging of images to promote accurate facial recognition.
    Type: Grant
    Filed: October 10, 2019
    Date of Patent: July 23, 2024
    Assignee: Google LLC
    Inventors: Zhijun He, Wen Yu Chien, Po-Jen Chang, Xu Han, Adarsh Prakash Murthy Kowdle, Jae Min Purvis, Lu Gao, Gopal Parupudi, Clayton Merrill Kimber
  • Publication number: 20230367306
    Abstract: A method and an apparatus for equipment anomaly detection are provided. In the method, multiple signals of an equipment during normal operation or appearance images of the equipment when an appearance is not damaged are acquired in advance by using a data acquisition device to train a machine learning model stored in a storage device. A real-time signal of the equipment during a current operation or a current image of the appearance of the equipment is acquired by using the data acquisition device, and input to the trained machine learning model to output a detection result indicating a current operation state of the equipment or a current state of the appearance of the equipment.
    Type: Application
    Filed: February 23, 2023
    Publication date: November 16, 2023
    Applicant: Industrial Technology Research Institute
    Inventors: Po-Han Chang, An-Chun Luo, Tien I Kao, Ming-Ji Dai, Yi-Jen Lin, Po-Huan Chou
  • Patent number: 11471585
    Abstract: The present invention relates to a negative pressure wound therapy device, system and method. The negative pressure wound therapy device is connected with a dressing, and comprises a housing, a control circuit board, a pump, and an aspiration conduit. The pump generates negative pressure. The pump may comprise a voltage-actuated deformation element (such as piezoelectric vibration element) to push fluid from an aspiration end to a discharge end. The aspiration conduit has a pump end and a dressing end. The pump end is fluidly connected to the aspiration end of the pump, and the dressing end is fluidly connected to the dressing used for covering a wound. The control circuit board is disposed in the housing, controls the pump to generate the negative pressure in the aspiration conduit, and applies negative pressure to the wound covered by the dressing via the aspiration conduit.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: October 18, 2022
    Assignee: XIAMEN SUNEETEK MEDICAL EQUIPMENT CO., LTD.
    Inventors: Po-Han Chang, Shih Hua Hsiao, Bo Cheng Huang, Chi Yuan Chen, Ting Hsuan Chung
  • Patent number: 11324875
    Abstract: The present invention relates to a negative pressure wound therapy device, system and method. The negative pressure wound therapy device is connected with a dressing, and comprises a housing, a control circuit board, a pump, and an aspiration conduit. The pump generates negative pressure. The pump may comprise a voltage-actuated deformation element (such as piezoelectric vibration element) to push fluid from an aspiration end to a discharge end. The aspiration conduit has a pump end and a dressing end. The pump end is fluidly connected to the aspiration end of the pump, and the dressing end is fluidly connected to the dressing used for covering a wound. The control circuit board is disposed in the housing, controls the pump to generate the negative pressure in the aspiration conduit, and applies negative pressure to the wound covered by the dressing via the aspiration conduit.
    Type: Grant
    Filed: December 6, 2018
    Date of Patent: May 10, 2022
    Assignee: XIAMEN SUNEETEK MEDICAL EQUIPMENT CO., LTD.
    Inventors: Po-Han Chang, Shih Hua Hsiao, Bo Cheng Huang, Chi Yuan Chen, Ting Hsuan Chung
  • Publication number: 20220114419
    Abstract: A classification device and a classification method based on a neural network are provided. A heterogeneous integration module includes a convolutional layer, a data normalization layer, a connected layer and a classification layer. The convolutional layer generates a first feature map according to a first image data. The data normalization layer normalizes a first numerical data to generate a first normalized numerical data. The first numerical data corresponds to the first image data. The connected layer generates a first feature vector according to the first feature map and the first normalized numerical data. The classification layer generates a first classification result corresponding to a first time point according to the first feature vector. The heterogeneous integration module generates a second classification result corresponding to a second time point.
    Type: Application
    Filed: December 15, 2020
    Publication date: April 14, 2022
    Applicant: Industrial Technology Research Institute
    Inventors: Yu-Shan Deng, An-Chun Luo, Po-Han Chang, Chun-Ju Lin, Ming-Ji Dai
  • Patent number: 11193478
    Abstract: A diaphragm pump includes a valve seat, a head cover covered on the valve seat, and a pair of valve plates. A surface of the valves seat is formed concavely with a first receiving trough with a first flow passage, and a second receiving trough with a second flow passage. One of the valve plates is disposed in the first receiving trough, and the other one is disposed in the second receiving trough. The first and second receiving troughs respectively have a geometric shape corresponding with that of the valve plate. The valve plate has a sealing part, and at least one extending arm extended outwardly from the sealing part. The sealing part has a geometric shape being bilaterally symmetrical. The extending arm has an arced end. A gap is existed between an edge of the valves plate and the first receiving trough or the second receiving trough.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: December 7, 2021
    Assignee: KOGE MICRO TECH CO., LTD.
    Inventors: Po-Han Chang, Shu-Hong Lin, Hsien-Liang Cheng, Kang-Hung Yeh
  • Publication number: 20190376503
    Abstract: A diaphragm pump includes a valve seat, a head cover covered on the valve seat, and a pair of valve plates. A surface of the valves seat is formed concavely with a first receiving trough with a first flow passage, and a second receiving trough with a second flow passage. One of the valve plates is disposed in the first receiving trough, and the other one is disposed in the second receiving trough. The first and second receiving troughs respectively have a geometric shape corresponding with that of the valve plate. The valve plate has a sealing part, and at least one extending arm extended outwardly from the sealing part. The sealing part has a geometric shape being bilaterally symmetrical. The extending arm has an arced end. A gap is existed between an edge of the valves plate and the first receiving trough or the second receiving trough.
    Type: Application
    Filed: October 3, 2018
    Publication date: December 12, 2019
    Inventors: Po-Han Chang, Shu-Hong Lin, Hsien-Liang Cheng, Kang-Hung Yeh
  • Publication number: 20190201599
    Abstract: The present invention relates to a negative pressure wound therapy device, system and method. The negative pressure wound therapy device is connected with a dressing, and comprises a housing, a control circuit board, a pump, and an aspiration conduit. The pump generates negative pressure. The pump may comprise a voltage-actuated deformation element (such as piezoelectric vibration element) to push fluid from an aspiration end to a discharge end. The aspiration conduit has a pump end and a dressing end. The pump end is fluidly connected to the aspiration end of the pump, and the dressing end is fluidly connected to the dressing used for covering a wound. The control circuit board is disposed in the housing, controls the pump to generate the negative pressure in the aspiration conduit, and applies negative pressure to the wound covered by the dressing via the aspiration conduit.
    Type: Application
    Filed: December 6, 2018
    Publication date: July 4, 2019
    Inventors: PO-HAN CHANG, SHIH HUA HSIAO, BO CHENG HUANG, CHI YUAN CHEN, TING HSUAN CHUNG
  • Publication number: 20180355859
    Abstract: A meter-type magnetic pump and its light interrupting module achieve flow measurement by providing a main cavity body having a light interrupter at the inner side of a first cavity, and providing at least a light interrupting element in the first cavity and fastened around the rotating shaft, such that the light interrupting element is brought into rotation by the rotating shaft, wherein the at least one light interrupting blade of the at least one light interrupting element periodically interrupts a light source provided by the light interrupter, allowing the light interrupter to generate at least one signal, electrically coupling the control circuit with the light interrupter to receive the at least one signal and perform a measuring process.
    Type: Application
    Filed: August 21, 2017
    Publication date: December 13, 2018
    Inventors: Po-Han Chang, Shu-Hong Lin, Tien-Ho Wu
  • Publication number: 20180355872
    Abstract: A meter-type magnetic pump and its light interrupting module achieve flow measurement by providing a main cavity body having a light interrupter at the inner side of a first cavity, and providing at least a light interrupting element in the first cavity and fastened around the rotating shaft, such that the light interrupting element is brought into rotation by the rotating shaft, wherein the at least one light interrupting blade of the at least one light interrupting element periodically interrupts a light source provided by the light interrupter, allowing the light interrupter to generate at least one signal, electrically coupling the control circuit with the light interrupter to receive the at least one signal and perform a measuring process.
    Type: Application
    Filed: June 13, 2017
    Publication date: December 13, 2018
    Inventors: Po-Han Chang, Shu-Hong Lin, Tien-Ho Wu
  • Publication number: 20120311820
    Abstract: A knob and process of manufacturing same is provided. The knob includes a knob portion formed of plastic; and a shank portion comprising a first hollow cylindrical member including an annular flange extending outward at one end, and a second hollow cylindrical member including an annular flange extending outward at one end, the annular flange of the first hollow cylindrical member being disposed in alignment with the annular flange of the second hollow cylindrical member. The whole second hollow cylindrical member and a portion of the first hollow cylindrical member of the shank portion are within the knob portion. The plastic knob portion has increased traction.
    Type: Application
    Filed: June 9, 2011
    Publication date: December 13, 2012
    Inventor: Po-Han Chang
  • Publication number: 20110186884
    Abstract: A reflective structure is fabricated for a light emitting diode (LED). An ohmic contact layer of the LED is made into a netlike structure. Thus, a current is evenly distributed and a low contact resistance is remained. Furthermore, the reflective layer directly reflects light through holes of the netlike structure on emitting light. Thus, a reflectivity of the LED is enhanced.
    Type: Application
    Filed: February 3, 2010
    Publication date: August 4, 2011
    Applicant: NATIONAL CENTRAL UNIVERSITY
    Inventors: Cheng-Yi Liu, Po-Han Chang
  • Patent number: 6030008
    Abstract: An adjustable lock latch is composed of a main body, two fastening plates, two rotary wheels, and a handle. The main body has two action rods provided with a projection. The fastening plates are provided with a first position confining hole and a second position confining hole. The rotary wheels are provided with a through hole and a moving block engageable with the projection of the action rods of the main body. The handle is engageable with the through hole of the rotary wheels and with the first position confining hole or the second position confining hole of the fastening plates, so as to actuate the moving block of the rotary wheels.
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: February 29, 2000
    Inventor: Po Han Chang