Patents by Inventor Lan-Ting Hsu

Lan-Ting Hsu 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).

  • LED device, LED driving circuit and method
    Patent number: 9119249
    Abstract: A light-emitting diode (LED) driving circuit includes an LED control circuit and a power stage circuit. The LED control circuit shifts an input pulse width modulation (PWM) signal toward a higher frequency direction in a frequency domain to generate an output PWM signal having a duty cycle substantially the same as a duty cycle of the input PWM signal. The power stage circuit outputs an LED driving current according to the output PWM signal.
    Type: Grant
    Filed: October 21, 2013
    Date of Patent: August 25, 2015
    Assignee: NOVATEK MICROELECTRONICS CORP.
    Inventors: Hsing-Chien Yang, Wen-Hsin Cheng, Ying-Hao Hsu, Lan-Ting Hsu, Tsung-Hau Chang
  • LED device, LED driving circuit and method
    Patent number: 8994277
    Abstract: A light-emitting diode (LED) driving circuit includes an LED control circuit and a power stage circuit. The LED control circuit shifts an input pulse width modulation (PWM) signal toward a higher frequency direction in a frequency domain to generate an output PWM signal having a duty cycle substantially the same as a duty cycle of the input PWM signal. The power stage circuit outputs an LED driving current according to the output PWM signal.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: March 31, 2015
    Assignee: Novatek Microelectronics Corp.
    Inventors: Hsing-Chien Yang, Wen-Hsin Cheng, Ying-Hao Hsu, Lan-Ting Hsu, Tsung-Hau Chang
  • LED DEVICE, LED DRIVING CIRCUIT AND METHOD
    Publication number: 20140042917
    Abstract: A light-emitting diode (LED) driving circuit includes an LED control circuit and a power stage circuit. The LED control circuit shifts an input pulse width modulation (PWM) signal toward a higher frequency direction in a frequency domain to generate an output PWM signal having a duty cycle substantially the same as a duty cycle of the input PWM signal. The power stage circuit outputs an LED driving current according to the output PWM signal.
    Type: Application
    Filed: October 21, 2013
    Publication date: February 13, 2014
    Applicant: NOVATEK MICROELECTRONICS CORP.
    Inventors: Hsing-Chien YANG, Wen-Hsin Cheng, Ying-Hao Hsu, Lan-Ting Hsu, Tsung-Hau Chang
  • LED DEVICE, LED DRIVING CIRCUIT AND METHOD
    Publication number: 20130049612
    Abstract: A light-emitting diode (LED) driving circuit includes an LED control circuit and a power stage circuit. The LED control circuit shifts an input pulse width modulation (PWM) signal toward a higher frequency direction in a frequency domain to generate an output PWM signal having a duty cycle substantially the same as a duty cycle of the input PWM signal. The power stage circuit outputs an LED driving current according to the output PWM signal.
    Type: Application
    Filed: November 10, 2011
    Publication date: February 28, 2013
    Applicant: NOVATEK MICROELECTRONICS CORP.
    Inventors: Hsing-Chien YANG, Wen-Hsin CHENG, Ying-Hao HSU, Lan-Ting HSU, Tsung-Hau CHANG
  • Dimmer circuit of light emitting diode and isolated voltage generator and dimmer method thereof
    Patent number: 8278832
    Abstract: An isolated configuration dimmer circuit of a light emitting diode (LED) applied to a conventional triac dimmer and a dimmer method are provided. When a dimmer phase angle of the triac dimmer is regulated, a second side winding of a transformer of the isolated configuration produces a pulse width corresponding to a modulated alternating current (AC) voltage, so as to regulate the pulse width of a driving signal output by the second side winding of the transformer. In addition, the dimmer circuit regulates the magnitude of a current flowing through the light emitting diode (LED) according to the pulse width corresponding to the modulated AC voltage. Accordingly, the dimmer circuit regulates the pulse width and the magnitude of the current flowing through the LED according to the dimmer phase angle of the triac dimmer. Therefore, a dimmer range of the LED can be increased.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: October 2, 2012
    Assignee: Novatek Microelectronics Corp.
    Inventors: Chen-Ming Hung, Maung Maung Win, Lan-Ting Hsu, Chih-Yuan Hsieh
  • DIMMER CIRCUIT OF LIGHT EMITTING DIODE AND ISOLATED VOLTAGE GENERATOR AND DIMMER METHOD THEREOF
    Publication number: 20110037399
    Abstract: An isolated configuration dimmer circuit of a light emitting diode (LED) applied to a conventional triac dimmer and a dimmer method are provided. When a dimmer phase angle of the triac dimmer is regulated, a second side winding of a transformer of the isolated configuration produces a pulse width corresponding to a modulated alternating current (AC) voltage, so as to regulate the pulse width of a driving signal output by the second side winding of the transformer. In addition, the dimmer circuit regulates the magnitude of a current flowing through the light emitting diode (LED) according to the pulse width corresponding to the modulated AC voltage. Accordingly, the dimmer circuit regulates the pulse width and the magnitude of the current flowing through the LED according to the dimmer phase angle of the triac dimmer. Therefore, a dimmer range of the LED can be increased.
    Type: Application
    Filed: November 23, 2009
    Publication date: February 17, 2011
    Applicant: Novatek Microelectronics Corp.
    Inventors: Chen-Ming Hung, Maung Maung Win, Lan-Ting Hsu, Chih-Yuan Hsieh