Patents by Inventor Zhiliang Chen
Zhiliang Chen 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: 9480118Abstract: System controller and method for a lighting system. The system controller includes a first controller terminal configured to receive a first signal, and a second controller terminal configured to output a second signal to a diver component. The driver component is configured to receive a first current and provide one or more drive currents to one or more light emitting diodes in response to the second signal. Additionally, the system controller is configured to process information associated with the first signal, determine a first time period for the first signal to increase from a first threshold to a second threshold, and determine a second time period for the first signal to decrease from the second threshold to the first threshold.Type: GrantFiled: January 9, 2015Date of Patent: October 25, 2016Assignee: Guangzhou On-Bright Electronics Co., Ltd.Inventors: Yimu Liao, Yuhao Liang, Zhiliang Chen, Lieyi Fang
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Patent number: 9307597Abstract: System and method are provided for regulating a string current flowing through a string of one or more light emitting diodes. A system controller includes a first controller terminal, a second controller terminal and a third controller terminal. The first controller terminal is coupled to a base terminal of a bipolar junction transistor, the bipolar junction transistor further including an emitter terminal and a collector terminal, the collector terminal being connected to the string of one or more light emitting diodes. The second controller terminal is coupled to the emitter terminal of the bipolar junction transistor and to a first resistor terminal of a resistor associated with a resistance. The third controller terminal is coupled to a second resistor terminal of the resistor. In addition, the system controller is configured to receive a reference voltage, receive an emitter voltage, and output a base current.Type: GrantFiled: December 9, 2014Date of Patent: April 5, 2016Assignee: Guangzhou On-Bright Electronics Co., Ltd.Inventors: Qiang Luo, Lieyi Fang, Zhiliang Chen
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Publication number: 20150312988Abstract: System controller and method for a lighting system. The system controller includes a first controller terminal configured to receive a first signal, and a second controller terminal configured to output a second signal to a diver component. The driver component is configured to receive a first current and provide one or more drive currents to one or more light emitting diodes in response to the second signal. Additionally, the system controller is configured to process information associated with the first signal, determine a first time period for the first signal to increase from a first threshold to a second threshold, and determine a second time period for the first signal to decrease from the second threshold to the first threshold.Type: ApplicationFiled: January 9, 2015Publication date: October 29, 2015Inventors: Yimu Liao, Yuhao Liang, Zhiliang Chen, Lieyi Fang
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Publication number: 20150084526Abstract: System and method are provided for regulating a string current flowing through a string of one or more light emitting diodes. A system controller includes a first controller terminal, a second controller terminal and a third controller terminal. The first controller terminal is coupled to a base terminal of a bipolar junction transistor, the bipolar junction transistor further including an emitter terminal and a collector terminal, the collector terminal being connected to the string of one or more light emitting diodes. The second controller terminal is coupled to the emitter terminal of the bipolar junction transistor and to a first resistor terminal of a resistor associated with a resistance. The third controller terminal is coupled to a second resistor terminal of the resistor. In addition, the system controller is configured to receive a reference voltage, receive an emitter voltage, and output a base current.Type: ApplicationFiled: December 9, 2014Publication date: March 26, 2015Inventors: Qiang Luo, Lieyi Fang, Zhiliang Chen
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Patent number: 8947012Abstract: Systems and methods are provided for regulating a string current flowing through a string of one or more light emitting diodes. A system controller includes a first controller terminal, a second controller terminal and a third controller terminal. The first controller terminal is coupled to a base terminal of a bipolar junction transistor, the bipolar junction transistor further including an emitter terminal and a collector terminal, the collector terminal being connected to the string of one or more light emitting diodes. The second controller terminal is coupled to the emitter terminal of the bipolar junction transistor and to a first resistor terminal of a resistor associated with a resistance. The third controller terminal is coupled to a second resistor terminal of the resistor. In addition, the system controller is configured to receive a reference voltage, receive an emitter voltage, and output a base current.Type: GrantFiled: July 25, 2012Date of Patent: February 3, 2015Assignee: Guangzhou On-Bright Electronics Co., Ltd.Inventors: Qiang Luo, Lieyi Fang, Zhiliang Chen
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Publication number: 20140210541Abstract: System and method for controlling one or more switches. The system includes a first converting circuit, a second converting circuit, and a signal processing component. The first converting circuit is configured to convert a first current and generate a first converted voltage signal based on at least information associated with the first current. The second converting circuit is configured to convert a second current and generate a second converted voltage signal based on at least information associated with the second current. The signal processing component is configured to receive the first converted voltage signal and the second converted voltage signal and generate an output signal based on at least information associated with the first converted voltage signal and the second converted voltage signal.Type: ApplicationFiled: April 2, 2014Publication date: July 31, 2014Applicant: ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.Inventors: Chao Yao, Tingzhi Yuan, Qiang Luo, Zhiliang Chen, Lieyi Fang
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Patent number: 8736345Abstract: System and method for controlling one or more switches. The system includes a first converting circuit, a second converting circuit, and a signal processing component. The first converting circuit is configured to convert a first current and generate a first converted voltage signal based on at least information associated with the first current. The second converting circuit is configured to convert a second current and generate a second converted voltage signal based on at least information associated with the second current. The signal processing component is configured to receive the first converted voltage signal and the second converted voltage signal and generate an output signal based on at least information associated with the first converted voltage signal and the second converted voltage signal.Type: GrantFiled: March 8, 2012Date of Patent: May 27, 2014Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Chao Yao, Tingzhi Yuan, Qiang Luo, Zhiliang Chen, Lieyi Fang
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Publication number: 20140015429Abstract: System and method are provided for regulating a string current flowing through a string of one or more light emitting diodes. A system controller includes a first controller terminal, a second controller terminal and a third controller terminal. The first controller terminal is coupled to a base terminal of a bipolar junction transistor, the bipolar junction transistor further including an emitter terminal and a collector terminal, the collector terminal being connected to the string of one or more light emitting diodes. The second controller terminal is coupled to the emitter terminal of the bipolar junction transistor and to a first resistor terminal of a resistor associated with a resistance. The third controller terminal is coupled to a second resistor terminal of the resistor. In addition, the system controller is configured to receive a reference voltage, receive an emitter voltage, and output a base current.Type: ApplicationFiled: July 25, 2012Publication date: January 16, 2014Inventors: Qiang Luo, Lieyi Fang, Zhiliang Chen
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Patent number: 8587226Abstract: System and method for driving a plurality of cold-cathode fluorescent lamps. The system includes a subsystem configured to receive at least a DC voltage and generate a first AC voltage in response to at least the DC voltage, a power converter configured to receive the first AC voltage and convert the first AC voltage to at least a second AC voltage, and a plurality of current balancing devices. Each of the plurality of current balancing devices is configured to receive two currents and balance the two currents. The power converter and the plurality of current balancing devices are capable of being directly or indirectly coupled to a plurality of cold-cathode fluorescent lamps.Type: GrantFiled: December 1, 2010Date of Patent: November 19, 2013Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Lieyi Fang, Changshan Zhang, Zhiliang Chen, Shifeng Zhao
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Publication number: 20130294121Abstract: System and method for protecting a power converter. A system includes a threshold generator configured to generate a threshold signal, and a first comparator configured to receive the threshold signal and a first signal and to generate a comparison signal. The first signal is associated with an input current for a power converter. Additionally, the system includes a pulse-width-modulation generator configured to receive the comparison signal and generate a modulation signal in response to the comparison signal, and a switch configured to receive the modulation signal and adjust the input current for the power converter. The threshold signal is associated with a threshold magnitude as a function of time. The threshold magnitude increases with time at a first slope during a first period, and the threshold magnitude increases with time at a second slope during a second period. The first slope and the second slope are different.Type: ApplicationFiled: May 22, 2013Publication date: November 7, 2013Applicant: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Lieyi Fang, Shifeng Zhao, Bo Li, Zhiliang Chen
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Patent number: 8537573Abstract: System and method for providing control for switch-mode power supply. According to an embodiment, the present invention provides a system for regulating a power converter. The system comprises a signal processing component that is configured to receive a first voltage and a second voltage, to process information associated with the first voltage and the second voltage, to determine a signal based on at least information associated with the first voltage and the second voltage, and to send the signal to a switch for a power converter. The switch is regulated based on at least information associated with the signal. The signal processing component is further configured to determine the signal to be associated a first mode, if the first voltage is higher than a first threshold.Type: GrantFiled: December 1, 2010Date of Patent: September 17, 2013Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Jun Ye, Zhen Zhu, Shifeng Zhao, Zhiliang Chen, Lieyi Fang
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Publication number: 20130200938Abstract: System and method for controlling one or more switches. The system includes a first converting circuit, a second converting circuit, and a signal processing component. The first converting circuit is configured to convert a first current and generate a first converted voltage signal based on at least information associated with the first current. The second converting circuit is configured to convert a second current and generate a second converted voltage signal based on at least information associated with the second current. The signal processing component is configured to receive the first converted voltage signal and the second converted voltage signal and generate an output signal based on at least information associated with the first converted voltage signal and the second converted voltage signal.Type: ApplicationFiled: March 8, 2012Publication date: August 8, 2013Applicant: ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.Inventors: Chao Yao, Tingzhi Yuan, Qiang Luo, Zhiliang Chen, Lieyi Fang
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Patent number: 8482946Abstract: System and method for protecting a power converter. A system includes a threshold generator configured to generate a threshold signal, and a first comparator configured to receive the threshold signal and a first signal and to generate a comparison signal. The first signal is associated with an input current for a power converter. Additionally, the system includes a pulse-width-modulation generator configured to receive the comparison signal and generate a modulation signal in response to the comparison signal, and a switch configured to receive the modulation signal and adjust the input current for the power converter. The threshold signal is associated with a threshold magnitude as a function of time. The threshold magnitude increases with time at a first slope during a first period, and the threshold magnitude increases with time at a second slope during a second period. The first slope and the second slope are different.Type: GrantFiled: August 8, 2011Date of Patent: July 9, 2013Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Lieyi Fang, Shifeng Zhao, Bo Li, Zhiliang Chen
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Patent number: 8391332Abstract: System and method for providing frequency control to a power converter. The system includes a pseudorandom signal generator configured to generate a digital signal. The digital signal is associated with at least an N-bit datum, and N is a positive integer. Additionally, the system includes a digital-to-analog converter configured to receive the digital signal and generate a first control signal, an output signal generator configured to receive the first control signal and generate at least a first output signal associated with a frequency, and a pulse-width-modulation generator configured to receive at least the first output signal. The N-bit datum represents a pseudorandom number.Type: GrantFiled: January 21, 2010Date of Patent: March 5, 2013Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Jun Ye, Zhen Zhu, Shifeng Zhao, Lieyi Fang, Zhiliang Chen
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Patent number: 8379415Abstract: Switch mode power converter system and method thereof. The system includes one or more isolation boxes including at least a first isolation box, an input primary winding for receiving an input signal for the switch mode power converter system, and an output secondary winding for generating an output signal for the switch mode power converter system. The switch mode power converter system is configured to convert the input signal to the output signal. One of the input primary winding and the output secondary winding is substantially enclosed in the first isolation box, and the other of the input primary winding and the output secondary winding is not enclosed in the first isolation box. The first isolation box is conductively connected to a constant-voltage source.Type: GrantFiled: January 13, 2012Date of Patent: February 19, 2013Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Zhiliang Chen, Xiuhong Zhang, Jun Ye, Shifeng Zhao, Lieyi Fang
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Patent number: 8344715Abstract: System and method for providing frequency control to a power converter. The system includes a controller configured to receive a load signal and generate a first control signal. The load signal indicates an output load for a power converter. Additionally, the system includes a signal generator configured to receive the first control signal and generates at least a first output signal. The first output signal is associated with a first signal strength and a first frequency. The first frequency is inversely proportional to a sum of a first time period, a second time period, and a third time period. The first signal strength increases with the time during the first time period, the first signal strength decreases with the time during the second time period, and the first signal strength is constant with respect to the time during the third time period.Type: GrantFiled: August 4, 2010Date of Patent: January 1, 2013Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Jun Ye, Zhen Zhu, Shifeng Zhao, Lieyi Fang, Zhiliang Chen
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Patent number: 8344643Abstract: Driver system and method for multiple cold-cathode fluorescent lamps and/or external-electrode fluorescent lamps. According to an embodiment, the present invention provides a system for driving a plurality of cold-cathode fluorescent lamps. The system includes a subsystem configured to receive at least a DC voltage and generate a first AC voltage in response to at least the DC voltage. The system also includes a power converter configured to receive the first AC voltage and convert the first AC voltage to at least a second AC voltage. The system further includes a plurality of current balancing devices. Each of the plurality of current balancing devices is configured to receive two currents and balance the two currents. The plurality of current balancing devices includes at least a first current balancing device, a second current balancing device, and a third current balancing device. In addition, the system includes a plurality of lamp pairs.Type: GrantFiled: April 21, 2010Date of Patent: January 1, 2013Assignee: On-Bright Electronic (Shanghai) Co., Ltd.Inventors: Lieyi Fang, Changshan Zhang, Zhiliang Chen, Shifeng Zhao
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Patent number: 8330525Abstract: A system and method for driving a bipolar junction transistor is provided. The system includes a first transistor including a first gate, a first terminal, and a second terminal. The first gate is configured to receive a first control signal. Additionally, the system includes a second transistor including a second gate, a third terminal, and a fourth terminal. The second gate is configured to receive a second control signal. Moreover, the system includes a first resistor including a fifth terminal and a sixth terminal. The fifth terminal is connected to the first terminal, and the sixth terminal is biased to a first predetermined voltage. The fourth terminal is biased to a second predetermined voltage. The second terminal and the third terminal are connected at a node, and the node is connected to a base for a bipolar junction transistor.Type: GrantFiled: June 20, 2011Date of Patent: December 11, 2012Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Lieyi Fang, Shifeng Zhao, Zhiliang Chen, Zhenhua Li
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Publication number: 20120300507Abstract: Switch mode power converter system and method thereof. The system includes one or more isolation boxes including at least a first isolation box, an input primary winding for receiving an input signal for the switch mode power converter system, and an output secondary winding for generating an output signal for the switch mode power converter system. The switch mode power converter system is configured to convert the input signal to the output signal. One of the input primary winding and the output secondary winding is substantially enclosed in the first isolation box, and the other of the input primary winding and the output secondary winding is not enclosed in the first isolation box. The first isolation box is conductively connected to a constant-voltage source.Type: ApplicationFiled: January 13, 2012Publication date: November 29, 2012Applicant: ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.Inventors: Zhiliang Chen, Xiuhong Zhang, Jun Ye, Shifeng Zhao, Lieyi Fang
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Patent number: 8125802Abstract: Switch mode power converter system and method thereof. The system includes one or more isolation boxes including at least a first isolation box, an input primary winding for receiving an input signal for the switch mode power converter system, and an output secondary winding for generating an output signal for the switch mode power converter system. The switch mode power converter system is configured to convert the input signal to the output signal. One of the input primary winding and the output secondary winding is substantially enclosed in the first isolation box, and the other of the input primary winding and the output secondary winding is not enclosed in the first isolation box. The first isolation box is conductively connected to a constant-voltage source.Type: GrantFiled: March 26, 2008Date of Patent: February 28, 2012Assignee: On-Bright Electronic (Shanghai) Co., Ltd.Inventors: Zhiliang Chen, Xiuhong Zhang, Jun Ye, Shifeng Zhao, Lieyi Fang