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1.发明申请公开(公告)号：US20190335563A1
公开(公告)日：2019-10-31
申请号：US16459321
申请日：2019-07-01
发明人： Weijia YU , Minmin FAN , Feng QI , Shungen SUN , Fuqiang ZHANG
IPC分类号： H05B33/08
摘要： The present disclosure provides a protection circuit, a drive system, a chip and a circuit protection method, and a drive method. The protection circuit can be used in a circuit system in which a load is driven by a switch circuit, and acquire a voltage signal reflecting the voltage of a power supply bus on which the load located and generate a detection signal, and control the switch circuit to maintain a forcible non-conductive state within a protection period when detecting that the voltage of the detection signal satisfies a preset voltage warning condition. The present application solves the problem of circuit protection of DC-powered electronics in the prior art.
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公开(公告)号：US20240023212A1
公开(公告)日：2024-01-18
申请号：US18343382
申请日：2023-06-28
发明人： Wenkai ZHAO , Shunfa ZHANG , Weijia YU
IPC分类号： H05B45/10 , H05B45/325 , H05B45/3725
CPC分类号： H05B45/10 , H05B45/325 , H05B45/3725
摘要： An LED dimming method, a dimming controller and system are disclosed. In a phase where a duty cycle of a PWM signal does not exceed a first threshold, every n periods of the PWM signal is taken as one set, taking a set as an output unit, and the duty cycle of the PWM signal is changed by incrementing or decrementing a average duty cycle by a first predetermined amount ΔP1 (0
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公开(公告)号：US20230209688A1
公开(公告)日：2023-06-29
申请号：US18051882
申请日：2022-11-02
发明人： Zhen LI , Weijia YU , Minmin FAN
IPC分类号： H05B47/14 , H05B45/3725 , G01R19/00
CPC分类号： H05B47/14 , G01R19/0038 , H05B45/3725
摘要： A full voltage sampling circuit includes a main sampling circuit, an assist sampling circuit and a processing circuit. The main sampling circuit receives first and second input voltages, and outputs a first sampling signal according to the first and second input voltages. The first sampling signal represents a differential voltage which indicates a difference between the first input voltage and the second input voltage. The assist sampling circuit receives the first and second input voltages, and outputs a second sampling signal according to the first and second input voltages. The second sampling signal represents the differential voltage. The processing circuit is coupled to the main sampling circuit and the assist sampling circuit, and selects a larger one of currents or voltages of the first and second sampling signals as a sampling result to be outputted.
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公开(公告)号：US20210212180A1
公开(公告)日：2021-07-08
申请号：US17207150
申请日：2021-03-19
发明人： Shungen SUN , Weijia YU
摘要： The present disclosure provides a leakage protection circuit, a method and a drive device. The leakage protection circuit is used for being electrically connected with the power supply line of a load, and may be configured to sample the power supply line at intervals, detect the voltage of the sampled electrical signals to determine whether the voltage of the AC input power is divided, and provide leakage protection based on the determined result. The present disclosure can prevent human from electric shock through sampling the electric signals from the power supply line at intervals and performing voltage detection and comparasion to determine whether the voltage of the accessed AC input power is divided, when the voltage of the accessed AC input power is determined to be divided, the power supply line will be controlled in non-conductive state.
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公开(公告)号：US20190338936A1
公开(公告)日：2019-11-07
申请号：US16515939
申请日：2019-07-18
发明人： Shungen SUN , Weijia YU
摘要： The present disclosure provides a leakage protection circuit, a method and a drive device. The leakage protection circuit is used for being electrically connected with the power supply line of a load, and may be configured to sample the power supply line at intervals, detect the voltage of the sampled electrical signals to determine whether the voltage of the AC input power is divided, and provide leakage protection based on the determined result. The present disclosure can prevent human from electric shock through sampling the electric signals from the power supply line at intervals and performing voltage detection and comparison to determine whether the voltage of the accessed AC input power is divided, when the voltage of the accessed AC input power is determined to be divided, the power supply line will be controlled in non-conductive state.
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6.发明申请公开(公告)号：US20190335562A1
公开(公告)日：2019-10-31
申请号：US16230882
申请日：2018-12-21
发明人： Weijia YU , Minmin FAN , Feng QI , Shungen SUN , Fuqiang ZHANG
IPC分类号： H05B33/08
摘要： The present disclosure provides a protection circuit, a drive system, a chip and a circuit protection method, and a drive method. The protection circuit can be used in a circuit system in which a load is driven by a switch circuit, and acquire a voltage signal reflecting the voltage of a power supply bus on which the load located and generate a detection signal, and control the switch circuit to maintain a forcible non-conductive state within a protection period when detecting that the voltage of the detection signal satisfies a preset voltage warning condition. The present application solves the problem of circuit protection of DC-powered electronics in the prior art.
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公开(公告)号：US20190170336A1
公开(公告)日：2019-06-06
申请号：US15891928
申请日：2018-02-08
发明人： Shungen SUN , Weijia YU
摘要： The present disclosure provides a leakage protection circuit, a method and a drive device. The leakage protection circuit is used for being electrically connected with the power supply line of a load, and may be configured to sample the power supply line at intervals, detect the voltage of the sampled electrical signals to determine whether the voltage of the AC input power is divided, and provide leakage protection based on the determined result. The present disclosure can prevent human from electric shock through sampling the electric signals from the power supply line at intervals and performing voltage detection and comparasion to determine whether the voltage of the accessed AC input power is divided, when the voltage of the accessed AC input power is determined to be divided, the power supply line will be controlled in non-conductive state.
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公开(公告)号：US20190132924A1
公开(公告)日：2019-05-02
申请号：US16024001
申请日：2018-06-29
发明人： Minmin FAN , Weijia YU
摘要： The present disclosure provides a line voltage compensation circuit, an LED drive system and a drive method. The line voltage compensation circuit is configured to receive signal reflecting bus voltage and output line voltage compensation signal based on the received signal reflecting bus voltage, a preset baseline voltage and at least one reference voltage, wherein the line voltage compensation signal has a multi-segment linear relationship with the received signal reflecting bus voltage. In the technical solution provided by the present application, the linear relationship between the feedback voltage of the LED load and the built-in baseline voltage is adjusted based on at least one preset threshold to output segment-based line voltage compensation signal. Compared with the line voltage compensation technology with a single slope, better input voltage line regulation and better LED current line regulation can be obtained by adopting the technical solution provided by the present application.
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