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公开(公告)号：US11910502B2
公开(公告)日：2024-02-20
申请号：US17770022
申请日：2020-10-20
Applicant: SIGNIFY HOLDING B.V.
Inventor： Paul Robert Veldman , Jie Fu , Haimin Tao , Gang Wang , Zhiquan Chen , Jian Longqui
IPC: H05B45/30 , H05B45/3578 , H05B45/355 , H05B45/3725
CPC classification number: H05B45/3578 , H05B45/355 , H05B45/3725
Abstract: An LED driver for an LED lamp, which also comprises an LED load. The LED driver is adapted to connect to an input source at a first and second terminal. The LED driver comprises a switching arrangement configured to enable a controller to control at least a magnitude and phase of the voltage between the first and second terminals. The phase of the voltage between the first and second terminals may be defined to control an amount of power that flows from the input source to power the LED lamp.
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Patent Agency Ranking
公开(公告)号：US12224668B2
公开(公告)日：2025-02-11
申请号：US18014331
申请日：2021-06-23
Applicant: SIGNIFY HOLDING B.V.
Inventor： Yu Wang , Zhiquan Chen , Jie Fu , Shan Wang , Gang Wang
Abstract: A boost converter has a main energy storage inductor and a main GaN boost switch with a node between them. A pre-charging switch is connected at the output side of the main boost switch and the inductor, between the node and an output capacitor. The pre-charging switch comprises a body diode in the forward direction from the output capacitor to the node. The output capacitor is charged by the pre-charging switch in a pre-charge phase and this provides a soft start-up to avoid large inrush currents. A third switch, which is also a GaN switch, is in series with the pre-charging switch to provide synchronous output rectification. The third switch has a body diode in a forward direction from the node to the output capacitor. In the pre-charge phase, both the boost switch and third switch are turned off whereas in a subsequent boost phase, the pre-charging switch is turned constantly on, and alternately the boost switch and the third switch are turned on and off to implement the boost conversion.
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公开(公告)号：US11582849B2
公开(公告)日：2023-02-14
申请号：US17431503
申请日：2020-02-18
Applicant: SIGNIFY HOLDING B.V.
Inventor： Paul Robert Veldman , Marcus Cornelis Van Meel , Jie Fu , Zhiquan Chen , Raimundo De Heer Galisteo , Yuanqiang Liu , Shiguang Sun , Gang Wang
IPC: H05B45/30 , H05B45/46 , H05B45/3578 , H05B45/38 , H05B45/355 , H05B45/375
Abstract: An LED driver that is operable with two different types of power source originally designed for a high-intensity discharge lamp. The LED driver directs current of an input power provided by the power source down a first current path if it is determined that the power source comprises a functional ignitor. The LED driver directs current of an input power provided by the power source down a second current path if it is determined that the 5 power source does not comprise a functional ignitor.
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公开(公告)号：US11540376B2
公开(公告)日：2022-12-27
申请号：US17422263
申请日：2020-01-14
Applicant: SIGNIFY HOLDING B.V.
Inventor： Dmytro Viktorovych Malyna , Jie Fu , Raimundo De Heer Galisteo , Zhiquan Chen , Marcus Cornelis Van Meel , Simon Jacobus Maria Kuppens , Yuanqiang Liu , Shiguang Sun , Fan Zheng , Paul Robert Veldman , Gang Wang
IPC: H05B45/50 , H05B45/3725 , H05B45/357
Abstract: A device for determining a type of a power source for powering a LED lighting unit, wherein one possible type comprises a ballast originally designed for a high intensity discharge lamp and repurposed for use with an LED lighting unit. The power source type determiner monitors at least one electrical parameter of either a load or the power source itself after a power drawn by the load whose characteristic is set to a critical value. A value of the electrical parameter is used to identify a type of the power source. A value of the electrical parameter is the pulse generated by the traditional ballast for gas discharge lamp, which pulse is detected to determine the type of the power source.
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公开(公告)号：US12295079B2
公开(公告)日：2025-05-06
申请号：US18556193
申请日：2022-04-19
Applicant: SIGNIFY HOLDING B.V.
Inventor： Jie Fu , Shiguang Sun , Zhiquan Chen , Feng Ju , Yu Wang , Gang Wang
Abstract: To provide a safer over voltage protection, it is provided a driving circuit for a light emitting source, comprising an input adapted to receive a power supply; a conversion circuit, adapted to convert the power supply and provide a converted power, comprising a power switch (M2); an output, adapted to output the converted power; an output capacitor (C2) connected at the output; a first control circuit coupled to the output and connected to the power switch (M2), adapted to sense a voltage corresponding to the voltage on the output capacitor and control the power switch operate in a power-reducing mode to reduce the converted power when the voltage corresponding to the voltage on the output capacitor sensed by the first control circuit exceeds a first level; and a second control circuit (D15) connected to the output capacitor (C2) and connected to a control terminal of the power switch (M2), adapted to sense a voltage at the output capacitor (C2) and damage and make the power switch (M2) unoperational permanently when the voltage at the output capacitor (C2) sensed by the second control circuit exceeds a second level.
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公开(公告)号：US12273096B2
公开(公告)日：2025-04-08
申请号：US18032420
申请日：2021-10-22
Applicant: SIGNIFY HOLDING B.V.
Abstract: A driver circuit is for driving a GaN power commutation switch of a switch mode power converter. A sensing component is connected to the GaN switch for sensing a parameter such as a peak current of the power commutation. An energy storage component provides a certain turn on voltage between the gate and source of the GaN switch. The charging and discharging of the energy storage component is regulated, and the sensing is disabled with timing which is synchronized with the charging and discharging function of the energy storage component. It is prevented that a voltage across the sensing component reduces the generated gate-source drive voltage of the GaN switch.
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