Patents Assigned to On-Bright Electronics (Shanghai) Co., Ltd.
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Patent number: 9385612Abstract: System and method for regulating a power converter. The system includes a first signal generator configured to receive a first sensed signal and generate an output signal associated with demagnetization. The first sensed signal is related to a first winding coupled to a secondary winding for a power converter, and the secondary winding is associated with at least an output current for the power converter. Additionally, the system includes a ramping signal generator configured to receive the output signal and generate a ramping signal, and a first comparator configured to receive the ramping signal and a first threshold signal and generate a first comparison signal based on at least information associated with the ramping signal and the first threshold signal. Moreover, the system includes a second comparator configured to receive a second sensed signal and a second threshold signal and generate a second comparison signal.Type: GrantFiled: June 11, 2013Date of Patent: July 5, 2016Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Yunchao Zhang, Yaming Cao, Xiaomin Huang, Xiuhong Zhang, Lieyi Fang
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Patent number: 9379624Abstract: System and method for regulating an output of a power conversion system. An example system controller includes a signal generator and a modulation and drive component. The signal generator is configured to receive at least a first signal indicating a magnitude of an input voltage received by a primary winding of a power conversion system and receive a second signal indicating a magnitude of a primary current flowing through the primary winding, and generate a third signal. The modulation and drive component is configured to receive at least the third signal, generate a drive signal based on at least information associated with the third signal, and output the drive signal to a switch to affect the primary current.Type: GrantFiled: December 20, 2012Date of Patent: June 28, 2016Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Yuan Lin, Weihua Wang, Xiuhong Zhang, Lieyi Fang
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Patent number: 9379623Abstract: System and method for adjusting a threshold of a power conversion system. The system includes a threshold generator configured to receive a first signal and generate a threshold signal based on at least information associated with the first signal, a comparator configured to receive the threshold signal and a second signal and generate a comparison signal, and a gate driver configured to generate a drive signal based on at least information associated with the comparison signal. The gate driver is coupled to at least a switch configured to receive the drive signal and affect a current flowing through a primary winding coupled to a secondary winding. If the second signal is larger than the threshold signal in magnitude, the drive signal causes the switch to open. The drive signal is associated with a switching frequency.Type: GrantFiled: March 21, 2011Date of Patent: June 28, 2016Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Yunchao Zhang, Jinya Dong, Xiuhong Zhang, Lieyi Fang
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Patent number: 9374019Abstract: System and method for discharging a capacitor. An example system includes a signal detector and a discharge control component. The signal detector is configured to receive an input signal and generate a detection signal based on at least information associated with the input signal, the input signal being associated with an alternate current signal received by a capacitor including a first capacitor terminal and a second capacitor terminal. The discharge control component configured to receive at least the detection signal and generate an output signal to discharge the capacitor if the detection signal satisfies one or more conditions.Type: GrantFiled: February 6, 2012Date of Patent: June 21, 2016Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Miao Li, Lieyi Fang
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Patent number: 9369096Abstract: Systems and methods are provided for amplifying multiple input signals to generate multiple output signals. An example system includes a first channel, a second channel, and a third channel. The first channel is configured to receive one or more first input signals, process information associated with the one or more first input signals and a first ramp signal, and generate one or more first output signals. The second channel is configured to receive one or more second input signals, process information associated with the one or more second input signals and a second ramp signal, and generate one or more second output signals. The first ramp signal corresponds to a first phase. The second ramp signal corresponds to a second phase. The first phase and the second phase are different.Type: GrantFiled: October 1, 2014Date of Patent: June 14, 2016Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Tingzhi Yuan, Yaozhang Chen, Lieyi Fang
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Patent number: 9362737Abstract: System and method for protecting a power converter. The system includes a first comparator configured to receive a first threshold signal and a first signal and to generate a first comparison signal. The first signal is associated with an input current for a power converter. Additionally, the system includes a second comparator configured to receive a second threshold signal and the first signal and to generate a second comparison signal. The second threshold signal is different from the first threshold signal in magnitude. Moreover, the system includes a first detection component configured to receive at least the second comparison signal, detect the second comparison signal only if one or more predetermined conditions are satisfied, and generate a first detection signal based on at least information associated with the detected second comparison signal.Type: GrantFiled: September 29, 2014Date of Patent: June 7, 2016Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Dongze Yang, Yaming Cao, Yunchao Zhang, Lieyi Fang
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Patent number: 9350252Abstract: System and method for protecting a power conversion system. An example system controller includes a protection component and a driving component. The protection component is configured to receive a demagnetization signal generated based on at least information associated with a feedback signal of the power conversion system, process information associated with the demagnetization signal and a detected voltage generated based on at least information associated with the feedback signal, and generate a protection signal based on at least information associated with the detected voltage and the demagnetization signal. The driving component is configured to receive the protection signal and output a driving signal to a switch configured to affect a primary current flowing through a primary winding of the power conversion system. The detected voltage is related to an output voltage of the power conversion system. The demagnetization signal is related to a demagnetization period of the power conversion system.Type: GrantFiled: April 5, 2013Date of Patent: May 24, 2016Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Yunchao Zhang, Yuan Lin, Xiuhong Zhang, Lieyi Fang
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Patent number: 9331567Abstract: System and method are provided for regulating a power converter. The system includes a signal processing component configured to receive a first input signal and a second input signal, process information associated with the first input signal and the second input signal, and output a drive signal to a switch based on at least information associated with the first input signal and the second input signal. The first input signal is associated with at least a feedback signal related to an output voltage of the power converter. The second input signal is associated with at least a primary current flowing through a primary winding of the power converter. The signal processing component is further configured to change a peak value of the primary current within a first predetermined range, and change the switching frequency of the power converter within a second predetermined range.Type: GrantFiled: December 12, 2011Date of Patent: May 3, 2016Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Yuan Lin, Lieyi Fang
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Patent number: 9325234Abstract: System and method for protecting a power conversion system. An example system controller includes a protection component and a driving component. The protection component is configured to receive a feedback signal, a reference signal, and a demagnetization signal generated based on at least information associated with the feedback signal, process information associated with the feedback signal, the reference signal, and the demagnetization signal, and generate a protection signal based on at least information associated with the feedback signal, the reference signal, and the demagnetization signal. The demagnetization signal is related to multiple demagnetization periods of the power conversion system, the multiple demagnetization periods including a first demagnetization period and a second demagnetization period.Type: GrantFiled: January 9, 2014Date of Patent: April 26, 2016Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Yunchao Zhang, Xiuhong Zhang, Lieyi Fang
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Patent number: 9301349Abstract: System and method for dimming control. The system includes a system controller, a transistor, and a resistor. The system controller includes a first controller terminal and a second controller terminal. The transistor includes a first transistor terminal, a second transistor terminal and a third transistor terminal. The resistor including a first resistor terminal and a second resistor terminal. The first transistor terminal is coupled, directly or indirectly, to the second controller terminal. The first resistor terminal is coupled to the second transistor terminal. The second resistor terminal is coupled to the third transistor terminal. The system controller is configured to receive an input signal at the first controller terminal and to generate an output signal at the second controller terminal. The transistor is configured to receive the output signal at the first transistor terminal and to change between a first condition and a second condition.Type: GrantFiled: June 19, 2012Date of Patent: March 29, 2016Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Liqiang Zhu, Jun Zhou, Lieyi Fang
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Patent number: 9276571Abstract: System and method are provided for driving a transistor. The system includes a floating-voltage generator, a first driving circuit, and a second driving circuit. The floating-voltage generator is configured to receive a first bias voltage and generate a floating voltage, the floating-voltage generator being further configured to change the floating voltage if the first bias voltage changes and to maintain the floating voltage to be lower than the first bias voltage by a first predetermined value in magnitude. The first driving circuit is configured to receive an input signal, the first bias voltage and the floating voltage. The second driving circuit is configured to receive the input signal, a second bias voltage and a third bias voltage, the first driving circuit and the second driving circuit being configured to generate an output signal to drive a transistor.Type: GrantFiled: December 13, 2013Date of Patent: March 1, 2016Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Jiqing Yang, Meng Li, Qiang Luo, Lieyi Fang
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Patent number: 9257964Abstract: Oscillator system and method thereof. The oscillator system includes a first voltage-to-current converter configured to receive a first voltage and generate a first current based on at least information associated with the first voltage, and a second voltage-to-current converter configured to receive a second voltage and generate a second current based on at least information associated with the second voltage. Additionally, the oscillator system further includes a current-mode N-bit digital-to-analog converter configured to receive at least the second current and a first clock signal and to generate a third current based on at least information associated with the second current and the first clock signal. N is a first integer. The first clock signal is associated with a first clock frequency corresponding to a first clock period. Moreover, the oscillator system further includes a current comparator coupled to the first voltage-to-current converter and the current-mode N-bit digital-to-analog converter.Type: GrantFiled: November 20, 2013Date of Patent: February 9, 2016Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Liqiang Zhu, Lieyi Fang
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Patent number: 9244472Abstract: System and method for regulating a power conversion system. For example, a system controller for regulating a power conversion system includes an amplifier, a variable-resistance component, a capacitor, and a modulation and drive component. The amplifier is configured to receive a reference signal and a feedback signal associated with an output signal of the power conversion system, the amplifier including an amplifier terminal. The variable-resistance component is associated with a first variable resistance value, the variable-resistance component including a first component terminal and a second component terminal, the first component terminal being coupled with the amplifier terminal. The capacitor includes a first capacitor terminal and a second capacitor terminal, the first capacitor terminal being coupled with the second component terminal. The modulation and drive component includes a first terminal and a second terminal, the first terminal being coupled with the amplifier terminal.Type: GrantFiled: July 20, 2012Date of Patent: January 26, 2016Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Yaming Cao, Dongze Yang, Qiang Luo, Lieyi Fang
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Publication number: 20150303787Abstract: Systems and methods are provided for regulating a power conversion system. An example system controller includes a first controller terminal and a second controller terminal. The first controller terminal is configured to receive a first signal associated with an input signal for a primary winding of a power conversation system. The second controller terminal is configured to output a drive signal to a switch to affect a first current flowing through the primary winding of the power conversion system, the drive signal being associated with an on-time period, the switch being closed during the on-time period. The system controller is configured to adjust a duration of the on-time period based on at least information associated with the first signal.Type: ApplicationFiled: May 7, 2014Publication date: October 22, 2015Applicant: ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.Inventors: Xiangkun Zhai, Yunchao Zhang, Jun Zhou, Lieyi Fang
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Patent number: 9154038Abstract: Systems and methods are provided for regulating a power conversion system. An example system controller includes a driving component and a detection component. The driving component is configured to output a driving signal to a switch associated with a first current flowing through a primary winding of a power conversion system, the switch including a first switch terminal related to a first voltage and a second switch terminal related to a second voltage, the driving signal being associated with a plurality of switching periods. The detection component is configured to receive an input signal associated with a difference between the first voltage and the second voltage, detect at least one valley of the input signal in magnitude during a detection period for the first switching period, and output a detection signal based on at least information associated with the input signal to affect the driving signal.Type: GrantFiled: September 5, 2013Date of Patent: October 6, 2015Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Lieyi Fang, Chao Yao, Xiuhong Zhang, Yunchao Zhang
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Patent number: 9148061Abstract: System and method for regulating a power conversion system. A system controller for regulating a power conversion system includes a first controller terminal, a second controller terminal and a third controller terminal. The system controller is configured to receive an input signal at the first controller terminal and turn on or off a switch based on at least information associated with the input signal to adjust a primary current flowing through a primary winding of the power conversion system, receive a first signal at the second controller terminal from the switch, and charge a capacitor through the third controller terminal in response to the first signal.Type: GrantFiled: January 28, 2014Date of Patent: September 29, 2015Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Lieyi Fang, Zhiqiang Sun
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Patent number: 9143039Abstract: System and method for regulating a power conversion system. An example system controller for regulating a power conversion system includes a signal generator and a driving component. The signal generator is configured to receive a feedback signal associated with an output signal of a power conversion system and a current sensing signal associated with a primary current flowing through a primary winding of the power conversion system and generate a modulation signal based on at least information associated with the feedback signal and the current sensing signal. The driving component is configured to receive the modulation signal and output a drive signal to a switch based on at least information associated with the modulation signal.Type: GrantFiled: February 27, 2013Date of Patent: September 22, 2015Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Dongze Yang, Miao Li, Lieyi Fang
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Patent number: 9119242Abstract: System and method for igniting one or more high-intensity-discharge lamps. A system includes an ignition controller configured to generate one or more signal pulses for a pulse signal during a first predetermined time period and to cause one or more voltage pulses to be applied to the one or more high-intensity-discharge lamps, the pulse signal changing between a first logic level and a second logic level during the first predetermined time period, each of the one or more signal pulses corresponding to a pulse period, the pulse period being no larger than the first predetermined time period. The ignition controller is further configured to, if the one or more high-intensity-discharge lamps are not successfully ignited after the first predetermined time period, stop generating any signal pulse for the pulse signal for a second predetermined time period, the second predetermined time period being equal to or larger than the pulse period.Type: GrantFiled: March 19, 2014Date of Patent: August 25, 2015Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Huawei Lv, Dongze Yang, Lieyi Fang
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Patent number: 9113505Abstract: System and method for igniting one or more high-intensity-discharge lamps. A system includes an ignition controller configured to generate one or more signal pulses for a pulse signal during a first predetermined time period and to cause one or more voltage pulses to be applied to the one or more high-intensity-discharge lamps, the pulse signal changing between a first logic level and a second logic level during the first predetermined time period, each of the one or more signal pulses corresponding to a pulse period, the pulse period being no larger than the first predetermined time period. The ignition controller is further configured to, if the one or more high-intensity-discharge lamps are not successfully ignited after the first predetermined time period, stop generating any signal pulse for the pulse signal for a second predetermined time period, the second predetermined time period being equal to or larger than the pulse period.Type: GrantFiled: June 19, 2012Date of Patent: August 18, 2015Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Huawei Lv, Dongze Yang, Lieyi Fang
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Patent number: 9106142Abstract: System and method for regulating an output voltage of a power conversion system. The system includes an error amplifier coupled to a capacitor. The error amplifier is configured to receive a reference voltage, a first voltage, and an adjustment current and to generate a compensation voltage with the capacitor. The first voltage is associated with a feedback voltage. Additionally, the system includes a current generator configured to receive the compensation voltage and generate the adjustment current and a first current, and a signal generator configured to receive the first current and a second current. The signal generator is further configured to receive a sensing voltage and to generate a modulation signal. Moreover, the system includes the gate driver directly or indirectly coupled to the signal generator and configured to generate a drive signal based on at least information associated with the modulation signal.Type: GrantFiled: September 23, 2013Date of Patent: August 11, 2015Assignee: On-Bright Electronics (Shanghai) Co., Ltd.Inventors: Xiaomin Huang, Lieyi Fang