Patents by Inventor Heungjoo CHOI

Heungjoo CHOI 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).

  • Apparatus of detecting capacitance
    Patent number: 9671252
    Abstract: An apparatus of detecting capacitance detects a capacitance change of a capacitive sensor. The apparatus includes a pulse modulator configured to output a charging signal including at least one pulse. A switch is configured to charge the capacitive sensor according to the charging signal and output a discharging signal from the capacitive sensor. A discharging compensator is configured to output a discharging delay signal by compensating a voltage level of the discharging signal during a falling period of the discharging signal. A detector is configured to output a detection signal by detecting a region where the discharging delay signal has a voltage threshold. A controller is configured to detect the capacitance change by measuring a discharging time of the capacitive sensor according to the detection signal.
    Type: Grant
    Filed: October 17, 2014
    Date of Patent: June 6, 2017
    Assignees: Hyundai Motor Company, Hyundai Mobis Co., Ltd.
    Inventors: Haijin Seo, Wonho Shin, Jongil Yu, Heungjoo Choi, Jongchul Lim, Youngjun Jang
  • APPARATUS OF DETECTING CAPACITANCE
    Publication number: 20150160277
    Abstract: An apparatus of detecting capacitance detects a capacitance change of a capacitive sensor. The apparatus includes a pulse modulator configured to output a charging signal including at least one pulse. A switch is configured to charge the capacitive sensor according to the charging signal and output a discharging signal from the capacitive sensor. A discharging compensator is configured to output a discharging delay signal by compensating a voltage level of the discharging signal during a falling period of the discharging signal. A detector is configured to output a detection signal by detecting a region where the discharging delay signal has a voltage threshold. A controller is configured to detect the capacitance change by measuring a discharging time of the capacitive sensor according to the detection signal.
    Type: Application
    Filed: October 17, 2014
    Publication date: June 11, 2015
    Inventors: Haijin SEO, Wonho SHIN, Jongil YU, Heungjoo CHOI, Jongchul LIM, Youngjun JANG