Patents by Inventor Xianyun Zhao
Xianyun Zhao 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: 11723129Abstract: A voltage-regulating phase-cut dimmable power supply includes an electromagnetic interference filter circuit, a rectifier circuit, a power conversion circuit, a transformer, a rectifier and filter circuit, a phase-cut dimming signal conversion circuit, a first optocoupler, a dimming signal conversion circuit, a voltage comparison control circuit, a second optocoupler, a pulse width modulation (PWM) control circuit, and a voltage sampling circuit. The electromagnetic interference filter circuit, the rectifier circuit, the power conversion circuit, the transformer and the rectifier and filter circuit are electrically connected in sequence. The phase-cut dimming signal conversion circuit, the first optocoupler, the dimming signal conversion circuit, the voltage comparison control circuit, the second optocoupler and the PWM control circuit are electrically connected in sequence to an output end of the electromagnetic interference filter circuit.Type: GrantFiled: June 15, 2021Date of Patent: August 8, 2023Assignee: Zhuhai Shengchang Electronics Co., Ltd.Inventors: Dehua Zheng, Xianyun Zhao
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Publication number: 20210392729Abstract: A voltage-regulating phase-cut dimmable power supply includes an electromagnetic interference filter circuit, a rectifier circuit, a power conversion circuit, a transformer, a rectifier and filter circuit, a phase-cut dimming signal conversion circuit, a first optocoupler, a dimming signal conversion circuit, a voltage comparison control circuit, a second optocoupler, a pulse width modulation (PWM) control circuit, and a voltage sampling circuit. The electromagnetic interference filter circuit, the rectifier circuit, the power conversion circuit, the transformer and the rectifier and filter circuit are electrically connected in sequence. The phase-cut dimming signal conversion circuit, the first optocoupler, the dimming signal conversion circuit, the voltage comparison control circuit, the second optocoupler and the PWM control circuit are electrically connected in sequence to an output end of the electromagnetic interference filter circuit.Type: ApplicationFiled: June 15, 2021Publication date: December 16, 2021Applicant: Zhuhai Shengchang Electronics Co., Ltd.Inventors: Dehua Zheng, Xianyun Zhao
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Patent number: 10609799Abstract: A multi-output dimmable CLASS-2 power supply in accord with American standard connected to a dimming control signal includes a switching mode power supply circuit, a dimming control signal to PWM signal transforming circuit, and an overcurrent protection control circuit. The overcurrent protection control circuit includes an overcurrent protection circuit, a MOS transistor, and a resistor. If the multi-output dimmable power supply is required to have n outputs, the multi-output dimmable power supply in accord with American standard CLASS-2 includes n overcurrent protection control circuits, the dimming control signal to PWM signal transforming circuit (12) includes n output ends, and the n overcurrent protection control circuits include n overcurrent protection circuits, n MOS transistors, and n resistors, and the n overcurrent protection control circuits have an identical circuit connection.Type: GrantFiled: May 29, 2019Date of Patent: March 31, 2020Assignee: ZHUHAI SHENGCHANG ELECTRONICS CO, LTD.Inventors: Dehua Zheng, Xianyun Zhao
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Publication number: 20190373692Abstract: A multi-output dimmable CLASS-2 power supply in accord with American standard connected to a dimming control signal includes a switching mode power supply circuit, a dimming control signal to PWM signal transforming circuit, and an overcurrent protection control circuit. The overcurrent protection control circuit includes an overcurrent protection circuit, a MOS transistor, and a resistor. If the multi-output dimmable power supply is required to have n outputs, the multi-output dimmable power supply in accord with American standard CLASS-2 includes n overcurrent protection control circuits, the dimming control signal to PWM signal transforming circuit (12) includes n output ends, and the n overcurrent protection control circuits include n overcurrent protection circuits, n MOS transistors, and n resistors, and the n overcurrent protection control circuits have an identical circuit connection.Type: ApplicationFiled: May 29, 2019Publication date: December 5, 2019Applicant: Zhuhai Shengchang Electronics Co., Ltd.Inventors: Dehua Zheng, Xianyun Zhao
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Patent number: 10039167Abstract: The present invention discloses a wide input voltage phase-cut dimming circuit, which is connected and works in the overall dimming circuit. The overall dimming circuit includes a phase-cut dimmer, a dimming circuit, and an LED lamp. The dimming circuit includes a wide input voltage phase-cut dimming circuit, a switching power supply, a field effect transistor. The wide input voltage phase-cut dimming circuit includes a photoelectric coupler, and a PWM signal conversion circuit. The source and drain terminals of the field effect transistor are connected in series between the negative terminal of the output of the switching power supply and the negative terminal of the LED lamp. The output of the wide input voltage phase cut dimming circuit is connected to the gate of the field effect transistor. The output of the field effect transistor is controlled by the PWM signal conversion circuit.Type: GrantFiled: July 6, 2017Date of Patent: July 31, 2018Assignee: Zhuhai Shengchang Electronics Co., Ltd.Inventors: Dehua Zheng, Xianyun Zhao
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Patent number: 9961724Abstract: The present invention discloses a high power factor phase-cut dimming power supply system, which includes an alternating current power supply, a phase cutting dimmer, a high power factor phase-cut dimming power supply, an LED lamp, or an LED light. The high power factor phase-cut dimming power supply includes an anti-interference circuit that corresponds to and adaptively connect with each other, an active power factor correction circuit, a power conversion circuit, a dimmer current maintaining circuit, a signal conversion circuit, a photoelectric coupler, a PWM signal amplifying circuit and a field effect transistor. The present invention provides a high power factor phase-cut dimming power supply. It has advantages of a high power factor, a load power without any limitation, a high efficiency, an output power as high as several hundred watts. It can be widely used in the field of high power factor phase-cut dimming power supply.Type: GrantFiled: August 18, 2017Date of Patent: May 1, 2018Assignee: Zhuhai Shengchang Electronics Co., Ltd.Inventors: Dehua Zheng, Xianyun Zhao
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Patent number: 9942959Abstract: The present invention discloses a wide input voltage phase-cut dimming power supply, which is embedded in an overall dimming circuit. The overall dimming circuit includes an electric network power supply, a phase-cut dimmer, a dimming power supply, and an LED light. The dimming power supply includes an anti-interference circuit, an active power factor correction circuit, a power conversion circuit, a dimmer current maintaining circuit, a wide input voltage phase-cut dimming control circuit, and a filed effect transistor. Compared to the prior art, the present invention can realize a wide input voltage within 90-305V, which is suitable for most of electric networks around the world. Furthermore, the present invention uses a PWM control mode, so that it can control brightness of the LED lights with different colors, and be compatible with a leading edge dimmer or a trailing edge dimmer.Type: GrantFiled: August 17, 2017Date of Patent: April 10, 2018Assignee: Zhuhai Shengchang Electronics Co., Ltd.Inventors: Dehua Zheng, Xianyun Zhao
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Patent number: 9661710Abstract: The Invention discloses and provides a kind of dimmer holding current control circuit for phase cut dimming power supply, which comprises phase cut dimming power supply circuit and LED lamp (1) and dimmer holding current control circuit (2). The dimmer holding current control circuit (2) is composed of rectifier diode I (D1), rectifier diode II (D2), field-effect transistor (Q1), triode (Q2), current-limiting resistance I (R1), current-limiting resistance II (R2), sampling resistance I (R4), sampling resistance II (R5), diode (D3), capacitance (C1) and resistance (R3). The anodes of the rectifier diode I (D1) and the rectifier diode II (D2) are respectively connected to L terminal and N terminal of main supply input. The Invention makes the current small and stable through current limitation. The Invention can be widely used in the field of phase cut dimming power supply.Type: GrantFiled: August 26, 2016Date of Patent: May 23, 2017Assignee: ZHUHAI SHENGCHANG ELECTRONICS CO., LTD.Inventors: Dehua Zheng, Xianyun Zhao
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Patent number: 9609713Abstract: The invention discloses a kind of pulse width dimming control circuit for LED phase cut dimming power supply, which comprises LED phase cut dimming power supply circuit and pulse width dimming control circuit. The pulse width dimming control circuit is composed of voltage sampling amplification circuit, signal conversion circuit, photoelectric coupler and pulse width PWM control circuit. The signal input terminal of the voltage sampling amplification circuit is connected to the live wire L and the null line N after passing through the anti-interference circuit for voltage sampling. The output control part of the pulse width PWM control circuit consists of a field-effect transistor, the drain electrode of which connects to LED lamp. The Invention is a kind of pulse width dimming control circuit for LED phase cut dimming power supply, which has no restriction on load power and has strong compatibility with phase cut dimmer, wide dimming range.Type: GrantFiled: August 26, 2016Date of Patent: March 28, 2017Assignee: ZHUHAI SHENGCHANG ELECTRONICS CO., LTD.Inventors: Dehua Zheng, Xianyun Zhao
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Patent number: 9591710Abstract: The invention discloses and provides a kind of LED phase cut dimming power supply, which comprises AC power supply, phase cut dimmer, LED phase cut dimming power supply and, LED lamp or LED luminaire. The LED phase cut dimming power supply is composed of anti-interference circuit, rectifier circuit I, switching power circuit, rectifier circuit II, dimmer holding current circuit, decompression filter circuit, DC signal amplification circuit, signal conversion circuit, photoelectric coupler, pulse signal amplification circuit, MOS tube, power supply circuit VCC and power supply circuit VDD, which correspond to each and connect with each other adaptively. The input terminal of the anti-interference circuit connects to the output terminal of the phase cut dimmer, and MOS tube or DC TO DC circuit connects to LED lamp or LED luminaire. The invention can be widely used in the field of LED phase cut dimming power supply.Type: GrantFiled: August 26, 2016Date of Patent: March 7, 2017Assignee: ZHUHAI SHENGCHANG ELECTRONICS CO., LTD.Inventors: Dehua Zheng, Xianyun Zhao