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).
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Patent number: 9060402Abstract: 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: GrantFiled: September 11, 2012Date of Patent: June 16, 2015Assignee: RICHPOWER MICROELECTRONICS CORPORATIONInventors: Chin-Hui Wang, Peng-Ju Lan, Chen-Jie Ruan
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Patent number: 9006991Abstract: 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: GrantFiled: September 11, 2012Date of Patent: April 14, 2015Assignee: Richpower Microelectronics CorporationInventors: Chin-Hui Wang, Peng-Ju Lan, Chen-Jie Ruan
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Patent number: 9000682Abstract: 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: GrantFiled: March 14, 2013Date of Patent: April 7, 2015Assignee: Richpower Microelectronics CorporationInventors: Chen-Jie Ruan, Chin-Hui Wang, Peng-Ju Lan
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Publication number: 20140176002Abstract: 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: ApplicationFiled: September 11, 2012Publication date: June 26, 2014Applicant: RICHPOWER MICROELECTRONICS CORPORATIONInventors: Chin-Hui Wang, Peng-Ju Lan, Chen-Jie Ruan
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Patent number: 8581514Abstract: 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: GrantFiled: April 6, 2011Date of Patent: November 12, 2013Assignee: Richpower Microelectronics CorporationInventors: Chen-Jie Ruan, Chin-Hui Wang, Peng-Ju Lan
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Patent number: 8471497Abstract: 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: GrantFiled: April 6, 2011Date of Patent: June 25, 2013Assignee: Richpower Microelectronics CorporationInventors: Chen-Jie Ruan, Chin-Hui Wang, Liang Mao
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Publication number: 20130026944Abstract: 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: ApplicationFiled: September 11, 2012Publication date: January 31, 2013Applicant: RICHPOWER MICROELECTRONICS CORPORATIONInventors: CHIN-HUI WANG, PENG-JU LAN, CHEN-JIE RUAN
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Publication number: 20130026943Abstract: 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: ApplicationFiled: September 11, 2012Publication date: January 31, 2013Applicant: RICHPOWER MICROELECTRONICS CORPORATIONInventors: CHIN-HUI WANG, PENG-JU LAN, CHEN-JIE RUAN
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Publication number: 20110254469Abstract: 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: ApplicationFiled: April 6, 2011Publication date: October 20, 2011Inventors: Chen-Jie RUAN, Chin-Hui Wang, Peng-Ju Lan
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Publication number: 20110254462Abstract: 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: ApplicationFiled: April 6, 2011Publication date: October 20, 2011Inventors: Chen-Jie RUAN, Chin-Hui Wang, Liang Mao
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Publication number: 20100253242Abstract: 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: ApplicationFiled: March 31, 2010Publication date: October 7, 2010Applicant: RICHPOWER MICROELECTRONICS CORPORATIONInventors: CHIN-HUI WANG, PENG-JU LAN, CHEN-JIE RUAN