Patents by Inventor Yueh-Hua Chiang

Yueh-Hua Chiang 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: 20200178821
    Abstract: A method for detecting cardiac arrhythmia based on a photoplethysmographic (PPG) signal is provided. The method includes: receiving a PPG signal and a motion signal corresponding to a motion made by a user; extracting PPG signal segments and motion signal segments corresponding to a time period from the PPG signal and the motion signal, respectively, at every time period; filtering out motion artifact noise in the PPG signal segments according to the PPG signal segments and the motion signal segments, and converting the PPG signal segments and the motion signal segments into PPG spectrum diagrams and motion spectrum diagrams, respectively; obtaining an estimated heart rate according to the PPG spectrum diagrams and the motion spectrum diagrams; and determining whether cardiac arrhythmia is present based on the filtered PPG signal segments and the estimated heart rate.
    Type: Application
    Filed: September 20, 2019
    Publication date: June 11, 2020
    Inventors: Jo-Hua WU, Hsien-Yang CHIANG, Yu-Chun WU, Pin-Cyuan LIN, Ke-Han PAN, Yueh-Yarng TSAI
  • Patent number: 10034335
    Abstract: A switching mode constant current led driver including an energy transmission unit, an LED module, a power transistor, a resistor and a control unit, the control unit including a driving unit for generating a driving voltage signal, and a duty cycle determining unit for determining a duty cycle of the driving voltage signal, wherein, the duty cycle determining unit determines a charging time for a reference current to charge an external capacitor according to a present time length, and determines a discharging time for a discharging current to discharge the external capacitor according to an inductor discharging time, the discharging current being proportional to an average value of an inductor charging status signal, and a comparing voltage is thereby generated on the external capacitor; and compares the comparing voltage with a saw-tooth voltage to generate a next time length of the duty cycle.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: July 24, 2018
    Assignee: TAIWAN SEMICONDUCTOR CO., LTD.
    Inventors: Wei-Chun Hsiao, Yueh-Hua Chiang
  • Patent number: 9889036
    Abstract: A joint orthosis includes upper and lower members, and a joint mechanism. The joint mechanism includes a shielding cover and at least one of modular front and rear inserts. Each of the modular front and rear inserts is disposed to limit movement of a joint of a human body in a flexion/extension direction. The shielding cover is removably attached to a mounting frame of the joint mechanism and is configured to conceal and prevent access to the at least one or the modular front and rear inserts.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: February 13, 2018
    Assignee: Plus Meditech Co., Ltd.
    Inventors: Yueh-Hua Chiang, Fu-Lin Chuang, Chien-Min Fang
  • Patent number: 9433045
    Abstract: A drive circuit with an external mode-adjusting pin includes an operational mode control circuit and a drive processing circuit. The operational mode control circuit further includes a current mirror circuit, a resistor, a capacitor and a comparator. The first comparator input port receives a reference voltage. The second comparator input port couples the second output port of the current mirror and the capacitor. The current mirror circuit bases on a resistor current to generate a charge current for charging the capacitor. As the charge voltage at the second comparator input port reaches a reference voltage, a trigger signal is outputted to the drive processing circuit for controlling the switches thereof. The external pin is defined to one end of the resistor or the capacitor for varying the resistance or the capacitance respectively to determine the operational mode for the driven circuit.
    Type: Grant
    Filed: January 16, 2015
    Date of Patent: August 30, 2016
    Assignee: Taiwan Semiconductor Co., Ltd.
    Inventor: Yueh-Hua Chiang
  • Patent number: 9398971
    Abstract: A hinge for an orthopedic brace includes: a pivot shaft; a lower leg plate pivoted to the pivot shaft; an upper leg plate; a catch plate having a toothed peripheral edge; and two position adjusting units, each of which includes a rotatable limiting seat, a limiting pin, and a slider body. The rotatable limiting seat defines a housing chamber therein, and is formed with a wall slot. The slider body is slidably disposed in the housing chamber. The limiting pin extends from the slider body through the wall slot for engaging and disengaging the toothed peripheral edge. The catch plate is formed with a guiding groove. The rotatable limiting seat has a tongue protruding into the guiding groove.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: July 26, 2016
    Assignee: Plus Meditech Co., Ltd.
    Inventors: Yueh-Hua Chiang, Fu-Lin Chuang
  • Patent number: 9351542
    Abstract: A buckle assembly includes female and male buckle plates. The female buckle plate is formed with an insertion slot defined by a slot-defining wall having first and second wall faces, and has first and second corners. The first and second corners oppose each other, and are different in height with respect to a reference plane. The male buckle plate has a bent end portion that has upper and lower segments and a middle segment cooperating with the upper and lower segments to define upper and lower corners. The bent end portion is pivotable to the first corner by abutting the upper corner against the first corner, such that the bent end portion is rotatable relative to the first corner.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: May 31, 2016
    Assignee: PLUS MEDITECH CO., LTD.
    Inventors: Yueh-Hua Chiang, Fu-Lin Chuang
  • Publication number: 20160135259
    Abstract: A drive circuit with an external mode-adjusting pin includes an operational mode control circuit and a drive processing circuit. The operational mode control circuit further includes a current mirror circuit, a resistor, a capacitor and a comparator. The first comparator input port receives a reference voltage. The second comparator input port couples the second output port of the current mirror and the capacitor. The current mirror circuit bases on a resistor current to generate a charge current for charging the capacitor. As the charge voltage at the second comparator input port reaches a reference voltage, a trigger signal is outputted to the drive processing circuit for controlling the switches thereof. The external pin is defined to one end of the resistor or the capacitor for varying the resistance or the capacitance respectively to determine the operational mode for the driven circuit.
    Type: Application
    Filed: January 16, 2015
    Publication date: May 12, 2016
    Inventor: YUEH-HUA CHIANG
  • Publication number: 20160058596
    Abstract: A joint orthosis includes upper and lower members, and a joint mechanism. The joint mechanism includes a shielding cover and at least one of modular front and rear inserts. Each of the modular front and rear inserts is disposed to limit movement of a joint of a human body in a flexion/extension direction. The shielding cover is removably attached to a mounting frame of the joint mechanism and is configured to conceal and prevent access to the at least one or the modular front and rear inserts.
    Type: Application
    Filed: March 31, 2015
    Publication date: March 3, 2016
    Inventors: Yueh-Hua CHIANG, Fu-Lin CHUANG, Chien-Min FANG
  • Patent number: D758701
    Type: Grant
    Filed: June 23, 2015
    Date of Patent: June 14, 2016
    Assignee: Plus Meditech Co., Ltd.
    Inventors: Yueh-Hua Chiang, Kuo-Wei Lee
  • Patent number: D777418
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: January 31, 2017
    Assignee: Plus Meditech Co., Ltd.
    Inventors: Yueh-Hua Chiang, Kuo-Wei Lee
  • Patent number: D803067
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: November 21, 2017
    Assignee: LA POINTIQUE INTERNATIONAL LTD.
    Inventor: Yueh Hua Chiang
  • Patent number: D808817
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: January 30, 2018
    Assignee: OPPO MEDICAL INC.
    Inventor: Yueh Hua Chiang
  • Patent number: D808818
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: January 30, 2018
    Assignee: OPPO MEDICAL INC.
    Inventor: Yueh Hua Chiang
  • Patent number: D812848
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: March 20, 2018
    Assignee: Plus Meditech Co., Ltd.
    Inventors: Yueh-Hua Chiang, Hui-Hsien Hung, Shih-Hao Wang
  • Patent number: D812849
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: March 20, 2018
    Assignee: Plus Meditech Co., Ltd.
    Inventors: Yueh-Hua Chiang, Hui-Hsien Hung, Shih-Hao Wang
  • Patent number: D812850
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: March 20, 2018
    Assignee: Plus Meditech Co., Ltd.
    Inventors: Yueh-Hua Chiang, Hui-Hsien Hung, Shih-Hao Wang
  • Patent number: D812851
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: March 20, 2018
    Assignee: Plus Meditech Co., Ltd.
    Inventors: Yueh-Hua Chiang, Hui-Hsien Hung, Shih-Hao Wang
  • Patent number: D814309
    Type: Grant
    Filed: August 16, 2016
    Date of Patent: April 3, 2018
    Assignee: OPPO MEDICAL INC.
    Inventor: Yueh Hua Chiang
  • Patent number: D819448
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: June 5, 2018
    Assignee: OPPO MEDICAL INC.
    Inventor: Yueh Hua Chiang
  • Patent number: D819449
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: June 5, 2018
    Assignee: OPPO MEDICAL INC.
    Inventor: Yueh Hua Chiang