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.

公开(公告)号：US10986713B2

公开(公告)日：2021-04-20

申请号：US16633246

申请日：2018-07-23

Applicant: SIGNIFY HOLDING B.V.

Inventor： Dmytro Viktorovych Malyna ,  Luna X. Zhang ,  Yuangiang Liu ,  Gu Yuan Chen ,  Yun Fei Duan ,  Tijmen Cornelis Van Bodegraven ,  Jie Fu ,  Zhi Quan Chen ,  Shiguang Sun ,  Raimundo De Heer Galisteo ,  Marcus Cornelis Van Meel

IPC: H05B45/35 ,  H05B45/48 ,  H05B45/3578 ,  H05B45/37 ,  H05B45/54 ,  H05B45/345

Abstract: A retrofit lamp is to be used with a ballast. A shunt switch is provided in parallel with an output load and is adapted to shunt input terminals of the lamp using pulse width control so as to tune the current through the lighting element. This current control is used to enable compatibility with different ballasts and to provide dimming control. A detection circuit is used to detect an abnormal drive condition of the retrofit lamp and the pulse width control of the shunt switch can then be overridden by holding the shunt switch at a stable state for a certain duration. This prevents overload conditions and avoids DC signals in the event of component failures.

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

IPC: H05B45/50 ,  H05B45/38

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.

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.