Patents by Inventor Yuch-lung Huang

Yuch-lung Huang 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).

  • Fan motor speed control circuit
    Patent number: 7218073
    Abstract: A fan motor speed control circuit is disclosed. The circuit includes a digital/analog converting unit and a driving unit. The digital/analog converting unit takes charge of receiving a pulse width modulation (PWM) signal and converting it into a voltage signal. The driving unit is connected with the digital/analog converting unit in series for receiving the voltage signal, while the driving unit provides a first predetermined voltage level and a second predetermined voltage level as references. The fan motor is kept to run with a low constant rotation speed when the voltage signal level is higher than the first predetermined voltage level, with a full constant rotation speed when the voltage signal level is lower than the second predetermined voltage level, and with a variable rotation speed when the voltage signal level is lower than the first predetermined voltage level and higher than the second predetermined voltage level.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: May 15, 2007
    Assignee: Delta Electronics Inc.
    Inventors: Wen-shi Huang, Ming-shi Tsai, Cheng-chieh Liu, Tsung-jung Hsieh, Yuch-lung Huang
  • Fan motor speed control circuit
    Publication number: 20050019168
    Abstract: A fan motor speed control circuit is disclosed. The circuit includes a digital/analog converting unit and a driving unit. The digital/analog converting unit takes charge of receiving a pulse width modulation (PWM) signal and converting it into a voltage signal. The driving unit is connected with the digital/analog converting unit in series for receiving the voltage signal, while the driving unit provides a first predetermined voltage level and a second predetermined voltage level as references. The fan motor is kept to run with a low constant rotation speed when the voltage signal level is higher than the first predetermined voltage level, with a full constant rotation speed when the voltage signal level is lower than the second predetermined voltage level, and with a variable rotation speed when the voltage signal level is lower than the first predetermined voltage level and higher than the second predetermined voltage level.
    Type: Application
    Filed: October 30, 2003
    Publication date: January 27, 2005
    Inventors: Wen-Shi Huang, Ming-Shi Tsai, Cheng-Chieh Liu, Tsung-Jung Hsieh, Yuch-Lung Huang