Patents by Inventor Peng-Ju Lan
Peng-Ju Lan 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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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: 20120064378Abstract: A circuit and method are disclosed for providing smart protection to a battery pack against abnormal operation with an electrical switch. The battery cell of the battery pack is monitored to control the electrical switch. If abnormal operation occurs, the electrical switch will turn off to disconnect the battery cell. Once the abnormal condition disappears, the electrical switch will turn on and the battery cell will return to normal state.Type: ApplicationFiled: September 9, 2011Publication date: March 15, 2012Applicant: RICHPOWER MICROELECTRONICS CORPORATIONInventors: CHIN-HUI WANG, YING-JIE HAN, PENG-JU LAN
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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: 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
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Patent number: 7274177Abstract: An overshoot suppression circuit comprises a switch for coupling to an output of a voltage regulation module and a voltage detector for detecting an output voltage at the output. When the load to the voltage regulation module changes from heavy to light to result in the output voltage higher than a threshold, the voltage detector turns on the switch to release energy from the output, and thereby the output voltage is suppressed to produce overshoot to damage the load coupled to the output.Type: GrantFiled: July 14, 2005Date of Patent: September 25, 2007Assignee: Richtek Technology Corp.Inventors: Jian-Rong Huang, Liang-Pin Tai, Peng-Ju Lan
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Patent number: 7099127Abstract: In a voltage converter with a high-side short-circuit protection before an input voltage provided by a high-voltage power supply reaches a first threshold, a driver detects the input voltage and the output voltage of the converter to turn on the low-side transistor of the converter and turn off the high-voltage power supply when the input voltage ranges between the first threshold and a second threshold and the output voltage reaches a third threshold, to thereby avoid damages to the circuit connected to the output node of the converter. The driver comprises a front-end drive circuit to switch the high-side and low-side transistors and a low-voltage logic control circuit for the turning-on of the low-side transistor.Type: GrantFiled: September 3, 2003Date of Patent: August 29, 2006Assignee: Richtek Technology Corp.Inventors: Chao-Hsuan Chuang, Peng-Ju Lan, Hsien-Ming Chiu, Jing-Meng Liu
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Publication number: 20060012346Abstract: An overshoot suppression circuit comprises a switch for coupling to an output of a voltage regulation module and a voltage detector for detecting an output voltage at the output. When the load to the voltage regulation module changes from heavy to light to result in the output voltage higher than a threshold, the voltage detector turns on the switch to release energy from the output, and thereby the output voltage is suppressed to produce overshoot to damage the load coupled to the output.Type: ApplicationFiled: July 14, 2005Publication date: January 19, 2006Inventors: Jian-Rong Huang, Liang-Pin Tai, Peng-Ju Lan
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Publication number: 20040047091Abstract: In a voltage converter with a high-side short-circuit protection before an input voltage provided by a high-voltage power supply reaches a first threshold, a driver detects the input voltage and the output voltage of the converter to turn on the low-side transistor of the converter and turn off the high-voltage power supply when the input voltage ranges between the first threshold and a second threshold and the output voltage reaches a third threshold, to thereby avoid damages to the circuit connected to the output node of the converter. The driver comprises a front-end drive circuit to switch the high-side and low-side transistors and a low-voltage logic control circuit for the turning-on of the low-side transistor.Type: ApplicationFiled: September 3, 2003Publication date: March 11, 2004Inventors: Chao-Hsuan Chang, Peng-Ju Lan, Hsien-Ming Chiu, Jing-Meng Liu