Patents Assigned to On-Bright Electronics (Shanghai) Co., Ltd.
  • Patent number: 9564811
    Abstract: 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: Grant
    Filed: May 7, 2014
    Date of Patent: February 7, 2017
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Xiangkun Zhai, Yunchao Zhang, Jun Zhou, Lieyi Fang
  • Patent number: 9553501
    Abstract: System and method for protecting a power converter. An example system controller for protecting a power converter includes a signal generator, a comparator, and a modulation and drive component. The signal generator is configured to generate a threshold signal. The comparator is configured to receive the threshold signal and a current sensing signal and generate a comparison signal based on at least information associated with the threshold signal and the current sensing signal, the current sensing signal indicating a magnitude of a primary current flowing through a primary winding of a power converter. The modulation and drive component is coupled to the signal generator.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: January 24, 2017
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Chao Yao, Yunchao Zhang, Yuan Lin, Zhiqiang Sun, Lieyi Fang
  • Patent number: 9554432
    Abstract: 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: Grant
    Filed: August 5, 2015
    Date of Patent: January 24, 2017
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Liqiang Zhu, Jun Zhou, Lieyi Fang
  • Patent number: 9548652
    Abstract: System and method for protecting a power converter. The system includes a duty-cycle detection component configured to receive a modulation signal, determine a first duty cycle corresponding to a first period of the modulation signal, compare the first duty cycle with a threshold duty cycle, and generate a duty-cycle comparison signal. Additionally, the system includes a threshold generator configured to receive the duty-cycle comparison signal and generate a threshold signal corresponding to a second period of the modulation signal, the second period being after the first period, and a comparator configured to receive the 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. Moreover, the system includes a pulse-width-modulation component configured to receive the first comparison signal and generate the modulation signal for adjusting the input current for the power converter.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: January 17, 2017
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yaming Cao, Jinya Dong, Yunchao Zhang, Lieyi Fang
  • Patent number: 9531278
    Abstract: System and method for regulating an output current of a power conversion system. An example system controller for regulating an output current of a power conversion system includes a driving component, a demagnetization detector, a current-regulation component, and a signal processing component. The driving component is configured to output a drive signal to a switch in order to affect a primary current flowing through a primary winding of the power conversion system. The demagnetization detector is configured to receive a feedback signal associated with an output voltage of the power conversion system and generate a detection signal based on at least information associated with the feedback signal. The current-regulation component is configured to receive the drive signal, the detection signal and a current-sensing signal and output a current-regulation signal based on at least information associated with the drive signal, the detection signal, and the current sensing signal.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: December 27, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yunchao Zhang, Lieyi Fang
  • Patent number: 9431891
    Abstract: Systems and methods are provided for protecting a power conversion system. A system controller includes a two-level protection component and a driving component. The two-level protection component is configured to detect an output power of a power conversion system and generate a protection signal based on at least information associated with the output power. The driving component is configured to generate a drive signal based on at least information associated with the protection signal and output the drive signal to a switch associated with a primary current flowing through a primary winding of the power conversion system. The driving component is further configured to generate the drive signal corresponding to a first switching frequency to generate the output power equal to a first power threshold and generate the drive signal corresponding to a second switching frequency to generate the output power equal to a second power threshold.
    Type: Grant
    Filed: July 22, 2013
    Date of Patent: August 30, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Xiaomin Huang, Huawei Lv, Chao Yao, Qiang Luo, Lieyi Fang
  • Patent number: 9426850
    Abstract: System and method are provided for generating a plurality of channel currents. The system includes a channel reference generator configured to receive a first reference current and generate at least a first channel driving current and a second channel driving current, a first channel current divider configured to receive the first channel driving current and generate a first input current, a second input current, and a third input current, a second channel current divider configured to receive the second channel driving current and generate a fourth input current, a fifth input current, and a sixth input current, a first channel driver configured to receive the first input current, the second input current, and the third input current and generate a first channel current, and a second channel driver configured to receive the fourth input current, the fifth input current, and the sixth input current and generate a second channel current.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: August 23, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Jiqing Yang, Meng Li, Liqiang Zhu, Lieyi Fang
  • Patent number: 9413246
    Abstract: System and method for regulating a power conversion system. An example system controller includes: a first controller terminal and a second controller terminal. The system controller is configured to: receive an input signal at the first controller terminal and generate a first drive signal at the second controller terminal based on at least information associated with the input signal to turn on or off a transistor to affect a current associated with a secondary winding of the power conversion system. The system controller is further configured to: in response to the input signal changing from a first value larger than a first threshold to a second value smaller than the first threshold, change the first drive signal from a first logic level to a second logic level to turn on the transistor.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: August 9, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Qiang Luo, Yaming Cao, Lieyi Fang
  • Patent number: 9414455
    Abstract: System and method for dimming control. The system includes a system controller including a first controller terminal and a second controller terminal, a transistor including a first transistor terminal, a second transistor terminal and a third transistor terminal, and a resistor including a first resistor terminal and a second resistor terminal. The system controller is configured to generate a first signal at the first controller terminal based on an input signal and to generate a second signal at the second controller terminal based on the first signal. The first transistor terminal is coupled 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 transistor is configured to receive the second signal at the first transistor terminal and to change between two conditions in response to the second signal.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: August 9, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Jun Zhou, Zhongliang Xiong, Miao Li, Yaming Cao, Qiang Luo, Lieyi Fang
  • Patent number: 9408269
    Abstract: System and method for dimming control of one or more light emitting diodes. An example system includes one or more signal processing components configured to receive a first signal associated with a TRIAC dimmer, process information associated with the first signal, determine whether the TRIAC dimmer is in a first condition or a second condition, generate a second signal based on at least information associated with the first signal, and send the second signal to a switch. The one or more signal processing components are further configured to, if the TRIAC dimmer is determined to be in the first condition, generate the second signal to cause the switch to be opened and closed corresponding to a modulation frequency.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: August 2, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Liqiang Zhu, Jun Zhou, Yongsheng Su, Lieyi Fang
  • Patent number: 9397550
    Abstract: Systems and methods are provided for protecting a power conversion system. A system controller includes a first controller terminal and a second controller terminal. The first controller terminal is configured to provide a drive signal to close and open a switch to affect a first current flowing through a primary winding of a power conversion system. The second controller terminal is configured to receive first input signals during one or more first switching periods and receive second input signals during one or more second switching periods. The system controller is configured to determine whether a temperature associated with the power conversion system is larger than a predetermined temperature threshold, and in response to the temperature associated with the power conversion system being larger than the predetermined temperature threshold, generate the drive signal to cause the switch open and remain open to protect the power conversion system.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: July 19, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Xiaomin Huang, Huawei Lyu, Qiang Luo, Lieyi Fang
  • Patent number: 9385612
    Abstract: 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: Grant
    Filed: June 11, 2013
    Date of Patent: July 5, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yunchao Zhang, Yaming Cao, Xiaomin Huang, Xiuhong Zhang, Lieyi Fang
  • Patent number: 9379623
    Abstract: 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: Grant
    Filed: March 21, 2011
    Date of Patent: June 28, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yunchao Zhang, Jinya Dong, Xiuhong Zhang, Lieyi Fang
  • Patent number: 9379624
    Abstract: 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: Grant
    Filed: December 20, 2012
    Date of Patent: June 28, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yuan Lin, Weihua Wang, Xiuhong Zhang, Lieyi Fang
  • Patent number: 9374019
    Abstract: 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: Grant
    Filed: February 6, 2012
    Date of Patent: June 21, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Miao Li, Lieyi Fang
  • Patent number: 9369096
    Abstract: 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: Grant
    Filed: October 1, 2014
    Date of Patent: June 14, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Tingzhi Yuan, Yaozhang Chen, Lieyi Fang
  • Patent number: 9362737
    Abstract: 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: Grant
    Filed: September 29, 2014
    Date of Patent: June 7, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Dongze Yang, Yaming Cao, Yunchao Zhang, Lieyi Fang
  • Patent number: 9350252
    Abstract: 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: Grant
    Filed: April 5, 2013
    Date of Patent: May 24, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yunchao Zhang, Yuan Lin, Xiuhong Zhang, Lieyi Fang
  • Patent number: 9331567
    Abstract: 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: Grant
    Filed: December 12, 2011
    Date of Patent: May 3, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yuan Lin, Lieyi Fang
  • Patent number: 9325234
    Abstract: 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: Grant
    Filed: January 9, 2014
    Date of Patent: April 26, 2016
    Assignee: On-Bright Electronics (Shanghai) Co., Ltd.
    Inventors: Yunchao Zhang, Xiuhong Zhang, Lieyi Fang