Patents by Inventor CHEN-JIE RUAN

CHEN-JIE RUAN 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: 9060402
    Abstract: A state cycling apparatus uses a capacitor instead of complicated and expensive microcontroller to fulfill a state cycling function of a system. The state cycling apparatus includes an internal circuit in the system connected to the capacitor. In a first embodiment, the internal circuit reads the voltage level on the capacitor at power on to determine a current state for the system, and writes the voltage level corresponding to a next state of the system to the capacitor. In a second embodiment, the system reads the state data stored in the internal circuit to determine a current state for the system at power on, the capacitor is charged during the system is under power on, and the capacitor provides power for the internal circuit to store a state data after the system is powered off.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: June 16, 2015
    Assignee: RICHPOWER MICROELECTRONICS CORPORATION
    Inventors: Chin-Hui Wang, Peng-Ju Lan, Chen-Jie Ruan
  • Patent number: 9006991
    Abstract: A state cycling apparatus uses a capacitor instead of complicated and expensive microcontroller to fulfill a state cycling function of a system. The state cycling apparatus includes an internal circuit in the system connected to the capacitor. In a first embodiment, the internal circuit reads the voltage level on the capacitor at power on to determine a current state for the system, and writes the voltage level corresponding to a next state of the system to the capacitor. In a second embodiment, the system reads the state data stored in the internal circuit to determine a current state for the system at power on, the capacitor is charged during the system is under power on, and the capacitor provides power for the internal circuit to store a state data after the system is powered off.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: April 14, 2015
    Assignee: Richpower Microelectronics Corporation
    Inventors: Chin-Hui Wang, Peng-Ju Lan, Chen-Jie Ruan
  • Patent number: 9000682
    Abstract: A dimming circuit and method for a LED provide a first driving voltage or a second driving voltage according to a dimming signal provided by a functional IC to enable or disable the LED. The values of the first and second driving voltages are controlled so that overstressing of the LED is avoided while the functional IC is capable of working even when the LED is off. The LED's life time is thus prolonged.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: April 7, 2015
    Assignee: Richpower Microelectronics Corporation
    Inventors: Chen-Jie Ruan, Chin-Hui Wang, Peng-Ju Lan
  • Publication number: 20140176002
    Abstract: A state cycling apparatus uses a capacitor instead of complicated and expensive microcontroller to fulfill a state cycling function of a system. The state cycling apparatus includes an internal circuit in the system connected to the capacitor. In a first embodiment, the internal circuit reads the voltage level on the capacitor at power on to determine a current state for the system, and writes the voltage level corresponding to a next state of the system to the capacitor. In a second embodiment, the system reads the state data stored in the internal circuit to determine a current state for the system at power on, the capacitor is charged during the system is under power on, and the capacitor provides power for the internal circuit to store a state data after the system is powered off.
    Type: Application
    Filed: September 11, 2012
    Publication date: June 26, 2014
    Applicant: RICHPOWER MICROELECTRONICS CORPORATION
    Inventors: Chin-Hui Wang, Peng-Ju Lan, Chen-Jie Ruan
  • Patent number: 8581514
    Abstract: A dimming circuit and method for a LED provide a first driving voltage or a second driving voltage according to a dimming signal provided by a functional IC to enable or disable the LED. The values of the first and second driving voltages are controlled so that overstressing of the LED is avoided while the functional IC is capable of working even when the LED is off. The LED's life time is thus prolonged.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: November 12, 2013
    Assignee: Richpower Microelectronics Corporation
    Inventors: Chen-Jie Ruan, Chin-Hui Wang, Peng-Ju Lan
  • Patent number: 8471497
    Abstract: A control circuit and method for a LED driver accurately control the output current of the LED driver by adjusting a reference voltage or a feedback voltage according to the input voltage of the LED driver such that the output current decreases with the decrease of the input voltage. Therefore, it enhances the efficiency of the LED driver and maximizes the battery use time of a battery powered system.
    Type: Grant
    Filed: April 6, 2011
    Date of Patent: June 25, 2013
    Assignee: Richpower Microelectronics Corporation
    Inventors: Chen-Jie Ruan, Chin-Hui Wang, Liang Mao
  • Publication number: 20130026943
    Abstract: A state cycling apparatus uses a capacitor instead of complicated and expensive microcontroller to fulfill a state cycling function of a system. The state cycling apparatus includes an internal circuit in the system connected to the capacitor. In a first embodiment, the internal circuit reads the voltage level on the capacitor at power on to determine a current state for the system, and writes the voltage level corresponding to a next state of the system to the capacitor. In a second embodiment, the system reads the state data stored in the internal circuit to determine a current state for the system at power on, the capacitor is charged during the system is under power on, and the capacitor provides power for the internal circuit to store a state data after the system is powered off.
    Type: Application
    Filed: September 11, 2012
    Publication date: January 31, 2013
    Applicant: RICHPOWER MICROELECTRONICS CORPORATION
    Inventors: CHIN-HUI WANG, PENG-JU LAN, CHEN-JIE RUAN
  • Publication number: 20130026944
    Abstract: A state cycling apparatus uses a capacitor instead of complicated and expensive microcontroller to fulfill a state cycling function of a system. The state cycling apparatus includes an internal circuit in the system connected to the capacitor. In a first embodiment, the internal circuit reads the voltage level on the capacitor at power on to determine a current state for the system, and writes the voltage level corresponding to a next state of the system to the capacitor. In a second embodiment, the system reads the state data stored in the internal circuit to determine a current state for the system at power on, the capacitor is charged during the system is under power on, and the capacitor provides power for the internal circuit to store a state data after the system is powered off.
    Type: Application
    Filed: September 11, 2012
    Publication date: January 31, 2013
    Applicant: RICHPOWER MICROELECTRONICS CORPORATION
    Inventors: CHIN-HUI WANG, PENG-JU LAN, CHEN-JIE RUAN
  • Publication number: 20110254469
    Abstract: A dimming circuit and method for a LED provide a first driving voltage or a second driving voltage according to a dimming signal provided by a functional IC to enable or disable the LED. The values of the first and second driving voltages are controlled so that overstressing of the LED is avoided while the functional IC is capable of working even when the LED is off. The LED's life time is thus prolonged.
    Type: Application
    Filed: April 6, 2011
    Publication date: October 20, 2011
    Inventors: Chen-Jie RUAN, Chin-Hui Wang, Peng-Ju Lan
  • Publication number: 20110254462
    Abstract: A control circuit and method for a LED driver accurately control the output current of the LED driver by adjusting a reference voltage or a feedback voltage according to the input voltage of the LED driver such that the output current decreases with the decrease of the input voltage. Therefore, it enhances the efficiency of the LED driver and maximizes the battery use time of a battery powered system.
    Type: Application
    Filed: April 6, 2011
    Publication date: October 20, 2011
    Inventors: Chen-Jie RUAN, Chin-Hui Wang, Liang Mao
  • Publication number: 20100253242
    Abstract: A state cycling apparatus uses a capacitor instead of complicated and expensive microcontroller to fulfill a state cycling function of a system. The state cycling apparatus includes an internal circuit in the system connected to the capacitor. In a first embodiment, the internal circuit reads the voltage level on the capacitor at power on to determine a current state for the system, and writes the voltage level corresponding to a next state of the system to the capacitor. In a second embodiment, the system reads the state data stored in the internal circuit to determine a current state for the system at power on, the capacitor is charged during the system is under power on, and the capacitor provides power for the internal circuit to store a state data after the system is powered off.
    Type: Application
    Filed: March 31, 2010
    Publication date: October 7, 2010
    Applicant: RICHPOWER MICROELECTRONICS CORPORATION
    Inventors: CHIN-HUI WANG, PENG-JU LAN, CHEN-JIE RUAN