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公开(公告)号：US20240147590A1
公开(公告)日：2024-05-02
申请号：US18281104
申请日：2022-03-04
申请人： SIGNIFY HOLDING B.V.
IPC分类号： H05B45/375 , H05B45/36
CPC分类号： H05B45/375 , H05B45/36
摘要： A power converter for converting an input to an output for driving a load, said power converter comprising a switched mode power supply, SMPS, arranged for receiving an input and for converting said input to an output for driving said load, a buffer capacitor connected in a parallel branch across said load and arranged for buffering said output from said SMPS, a charge circuit, separate from said SMPS, and arranged for providing a charge current to said buffer capacitor until a voltage over said buffer capacitor exceeds a voltage threshold.
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公开(公告)号：US20220361308A1
公开(公告)日：2022-11-10
申请号：US17638485
申请日：2020-08-21
申请人： SIGNIFY HOLDING B.V.
IPC分类号： H05B47/185
摘要： In one aspect, a device is adapted to transmitting power to, or receive power from, a remote device over first and second communication lines (DALI+, DALI−) and to communicate with the remote device over the first and second communication lines. A first driver implements a first communications protocol which comprises coupling the first and second communication lines together to encode a first signal level and isolating the first and second communication lines from each other to encode a second signal level. This may be a DALI protocol. A second driver implements a second communications protocol which comprises modulating the first communication line with a signal having a low modulation depth. The second communications protocol means there is always a voltage difference between the two communication lines to enable continuous power harvesting. A second aspect relates to efficient power transfer by disabling a current limiter function, when possible.
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公开(公告)号：US20240121871A1
公开(公告)日：2024-04-11
申请号：US18279278
申请日：2022-03-07
申请人： SIGNIFY HOLDING B.V.
发明人： SHAN QING , GUY LOUIS PAUL DE BONDT , JUNWEI TIAN , DALIBOR CVORIC , MORNA SHEN , HERMANUS JOHANNES MARIA VOS , FRITS TOBI DE JONGH
摘要： In order to provide a balance between a fast start-up in start-up phase and a low light output ripple in normal operation phase, it is provided a LED driving circuit comprising: an input to receive a LED driving current, a buffer circuit adapted to buffer said LED driving current, and an output to be connected to LED and adapted to output the LED driving current, after buffered, to the LED, characterized in that, further comprises a buffer adjustment circuit adapted to adjust the buffer capability of the buffer circuit at a first level, in a start-up phase of the LED driving circuit when the LED driving circuit starts to receive said LED driving current, and adjust the buffer capability of the buffer circuit at a second level larger than the first level in a normal operation phase later than the start-up phase.
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公开(公告)号：US20210136893A1
公开(公告)日：2021-05-06
申请号：US16640094
申请日：2018-08-16
申请人： SIGNIFY HOLDING B.V.
IPC分类号： H05B45/37 , H05B45/3578 , H05B45/50
摘要： A retrofit Light Emitting Diode, LED, lighting device for connection to a ballast, wherein said ballast is arranged to provide for a ballast current, said retrofit LED lighting device comprising at least one LED for emitting light, a rectifier arranged for rectifying said ballast current and for providing a lamp current to said at least one LED, a shunt switch for shunting said at least one LED thereby preventing said lamp current to flow through said at least one LED, a control unit for controlling said shunt switch, wherein said control unit is arranged to detect a particular amplitude offset current level in one of said ballast current and said lamp current, said particular amplitude offset current level being a particular non-zero value of said ballast current or said lamp current and to activate said shunt switch triggered by said detection.
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