公开(公告)号：EP3030050B1

公开(公告)日：2018-10-03

申请号：EP14196236.5

申请日：2014-12-04

申请人： Yu Jing Energy Technology Co., Ltd

发明人： Yang, Sen-Tai

IPC分类号： H05B33/08 ,  G05F5/00 ,  H03K3/0233

CPC分类号： H05B33/0818 ,  H03K7/08 ,  Y02B20/341 ,  Y02B20/347

摘要： An offset voltage eliminating circuit structure for a protection mechanism of a dimmer includes a constant current source, a subtractor and a hysteresis comparator. The constant current source is used for outputting a stable current, the output of the constant current source is connected with a dimming signal input through a current-limiting resistor, and the dimming signal input is connected with an output of an external traditional dimmer. A voltage that causes an offset voltage is created across the current-limiting resistor when a current flows through the current-limiting resistor. An input of the subtractor is connected with the constant current source, and another input of the subtractor is input with an offset reference voltage. A non-inverting input of the hysteresis comparator is connected to the output of the subtractor, while the inverting input of the hysteresis comparator is input with a saw-tooth wave. By setting the offset reference voltage to be the same as the voltage of the current-limiting resistor, the subtractor eliminates the voltage of the current-limiting resistor, so that the hysteresis comparator is able to obtain the correct dimming signal voltage and output a GD pulse signal for adjusting the brightness of a LED.

公开(公告)号：EP3370479A1

公开(公告)日：2018-09-05

申请号：EP17158632.4

申请日：2017-03-01

申请人： Helvar Oy Ab

发明人： VANHANEN, Jouni ,  KOSKIMIES, Markus

IPC分类号： H05B33/08

CPC分类号： H05B33/0815 ,  H05B33/0845 ,  Y02B20/341

摘要： A driver device for semiconductor light sources comprises an output current path and an output with a first node and a second node. A controllable first switch on said output current path is coupled to one of said nodes, and an output capacitance is coupled to said output and to said first switch so that closing said first switch enables a discharging current to flow from said output capacitance through semiconductor light sources coupled between said first and second nodes. A control circuit is coupled to a control input of said first switch and configured to selectively open and close it. Said control circuit is configured to implement a closing sequence in closing said first switch, said closing sequence consisting of a series of closing pulses that become longer towards the end of the closing sequence.

公开(公告)号：EP2936933B1

公开(公告)日：2018-07-11

申请号：EP13830145.2

申请日：2013-12-19

申请人： Tridonic GmbH & Co. KG

发明人： BELL, Wayne ,  DALBY, Paul ,  MAKWANA, Deepak

IPC分类号： H05B33/08 ,  H05B37/02

CPC分类号： H05B33/0815 ,  H05B33/0824 ,  H05B33/0848 ,  Y02B20/341 ,  Y02B20/346 ,  Y02B20/348

摘要： In a first aspect, the invention provides an LED converter, comprising: a resonant converter with a switching regulator, preferably a clocked half-bridge converter, a galvanic barrier, the primary side of which being supplied by the switching regulator and the secondary side of which being arranged for providing directly or indirectly power to terminals for connecting one or more LEDs, a control circuit on the primary side of the galvanic barrier of the resonant converter, a sensing means on the secondary side of the galvanic barrier sensing a secondary side electric parameter indicative of an LED load, when connected to said terminals, a feedback path from the sensing means to the control circuit adapted to feedback the secondary side electric parameter from the secondary side of the galvanic barrier to the primary side of the galvanic barrier, wherein in case no LED string is connected to the LED converter, the control unit is adapted to cyclically control a switching frequency of switching regulator switches, in particular switches of the clocked half-bridge, from a high frequency to a lower frequency, and to monitor whether the secondary side electric parameter reaches a predetermined threshold value, and to, in case the predetermined threshold value is reached, deactivate the switching regulator switches and to activate a voltage protection switch to pull the secondary side electric parameter to ground.

公开(公告)号：EP2559323B1

公开(公告)日：2018-05-23

申请号：EP11717105.8

申请日：2011-04-14

申请人： Vektrex Electronic Systems, Inc.

发明人： HULETT, Jeffrey, Neil

IPC分类号： H05B33/08 ,  H02H7/12 ,  H02M3/157

CPC分类号： H05B33/089 ,  Y02B20/341

摘要： A fault protected current source is provided that can be used to safely drive LEDs in reliability test systems. The current source is includes circuits and processes that detect the common faults found in LED reliability test systems. After a fault is detected, the current source shuts down drive before destructive spikes are produced. Because only true LED failures are counted, this fault protected current source can be used to construct reliability test systems that produce more accurate reliability test data.

公开(公告)号：EP3262901A4

公开(公告)日：2018-03-07

申请号：EP15882940

申请日：2015-02-26

申请人： TRIDONIC GMBH & CO KG

发明人： LIN QUENTIN

IPC分类号： H05B37/02

CPC分类号： H05B37/03 ,  H05B33/0815 ,  H05B33/0884 ,  Y02B20/341

摘要： An operating device for an illuminant comprises input terminals (L, N) for being supplied with an AC voltage, output terminals (X1, X2) and a driving circuitry (1, 2) for driving the illuminant (3), when connected to the output terminals (X1, X2). In order to compensate an excessive high voltage between the output terminals (X1, X2) and the protective earth (PE) due to voltage surges at input terminals (L, N), bypass means (4) are provided to bypass a current from one of the output terminals (X1, X2) to protective earth (PE) and/or a neutral terminal (N) of the input terminals (L, N), wherein the bypass means (4) comprise at least one capacitor (C).

公开(公告)号：EP3145282A4

公开(公告)日：2018-03-07

申请号：EP15776962

申请日：2015-03-31

申请人： AIRIS TECH SOLUTIONS S L

发明人： MONTORO IRADIER AGUSTIN ,  MOLERA PICAZO JOSE VICENTE

IPC分类号： H05B33/08 ,  H02M7/02

CPC分类号： H04L12/10 ,  H02M1/12 ,  H05B33/0803 ,  H05B33/0842 ,  H05B33/0887 ,  H05B33/089 ,  H05B37/0263 ,  Y02B20/341 ,  Y02B20/48

摘要： INTELLIGENT POWER SOURCE, CAPABLE OF DIGITAL COMMUNICATION VIA THE POWER LINE, suitable for powering LEDs (8) of lights, and formed by an electronic device having: an input unit (3) connected to the alternating current line (230 V); a power regulator (4); power transformers (5); and an output unit (6) to which the power supply line (7) for the LEDs (8) is connected. In addition, the intelligent power source comprises a CPU microprocessor (10) and a PLC modem (11) both disposed in a compact assembly and linked to the input unit (3) and to the power regulator (4), said CPU microprocessor (10) and PLC modem (11) being used to control the entire operation of the intelligent power source, namely start-up, power, synchronization, temperature, voltage and the other functions of the source (1), as well as protection, communications with other sources, and storage of parameters and data.

公开(公告)号：EP3275289A1

公开(公告)日：2018-01-31

申请号：EP16712042.7

申请日：2016-03-24

申请人： Silicon Hill B.V.

发明人： SEGERS, Maarten, Willem ,  ROY, Shounak ,  STEFFENS, Paul ,  GROENENDAAL, Toon ,  HONOLD, Jürgen

IPC分类号： H05B33/08

CPC分类号： H05B33/083 ,  F21K9/27 ,  F21Y2115/10 ,  H05B33/0809 ,  H05B33/0824 ,  H05B33/0827 ,  H05B33/0887 ,  H05B33/089 ,  Y02B20/341

摘要： An LED lamp arrangement (1) adapted for fitting in a luminaire. The luminaire is adapted for a fluorescent lamp and having a ballast. The LED lamp arrangement has a plurality of LEDs (25, 26, 27) and two or more electrodes (22) for releasably connecting to the luminaire and for conducting current from the ballast for supply to the LEDs. The LED lamp arrangement further has a sensor circuit (21) and a protection circuit (24). The sensor circuit and the protection circuit are adapted to increase the total load impedance of the LED lamp arrangement if the ballast is a constant power electronic ballast.

公开(公告)号：EP3261414A1

公开(公告)日：2017-12-27

申请号：EP17176126.5

申请日：2017-06-14

申请人： SELF ELECTRONICS Germany GmbH ,  Self Electronics Co., Ltd. ,  Lin, Wanjiong

发明人： ZHOU, Xiaoyong ,  YOU, Xiaobo ,  ZHOU, Xuejun ,  ZHOU, Xiyong

IPC分类号： H05B33/08

CPC分类号： H05B33/0884 ,  H05B33/0887 ,  Y02B20/341

摘要： A protection circuit for short circuit of LED power supply includes a constant voltage source powered by the LED power supply, a constant current source powered by the LED power supply, a switching module for controlling the constant current source to turn off or turn on, and an output current detecting module for controlling the switching module to turn off or turn on. The constant current source is provided in parallel with the constant voltage source. The switching module includes a P-typed triode connected in series to the constant current source. The output current detecting module includes a N-typed triode, a base of the N-typed triode being electrically connected to the output terminal of the constant voltage source, an emitter of the N-typed triode grounding, and a collector of the N-typed triode being electrically a base of the P-typed triode.

摘要翻译： 一种LED电源短路保护电路，包括由LED电源供电的恒压源，由LED电源供电的恒流源，控制恒流源关闭或开启的开关模块，以及 输出电流检测模块，用于控制开关模块关闭或开启。 恒定电流源与恒定电压源并联提供。 开关模块包括与恒流源串联连接的P型三极管。 所述输出电流检测模块包括N型三极管，所述N型三极管的基极电连接所述恒压源的输出端，所述N型三极管接地的发射极和所述N型三极管的集电极， 型三极管是P型三极管的基极。

公开(公告)号：EP3254534A1

公开(公告)日：2017-12-13

申请号：EP16701809.2

申请日：2016-01-28

申请人： Philips Lighting Holding B.V.

发明人： CHEN, Hong ,  CHEN, Hongxin

IPC分类号： H05B33/08 ,  H01T15/00 ,  H02H9/00

CPC分类号： H02H9/005 ,  H02H3/04 ,  H02H9/041 ,  H02H9/042 ,  H03K3/017 ,  H05B33/0818 ,  H05B33/0887 ,  Y02B20/341 ,  Y02B20/346

摘要： A driver circuit comprises a mains input and a switch mode power converter for delivering an output derived from the mains input by switching using a pulse width modulation signal. The switch mode power converter comprises a pulse width controller for controlling the pulse width of the pulse width modulation signal. A monitor is used for monitoring the pulse width of the pulse width modulation signal and for detecting a surge event from the pulse width, wherein the monitor is for detecting the surge event from changes in the pulse width and/or duty cycle over time, and comprises a monitor circuit for detecting a surge event based on the pulse width and/or duty cycle reducing to correspond to a first pulse from a second pulse, remaining at the first pulse for a time period falling within a first threshold range and then returning to the second pulse, wherein the width of the first pulse is narrower than the second pulse.

公开(公告)号：EP3245851A1

公开(公告)日：2017-11-22

申请号：EP16737054.3

申请日：2016-01-08

申请人： Sengled Optoelectronics Co., Ltd.

发明人： WANG, Zhonghua ,  YU, Haiyang ,  LOU, Junshan ,  SHEN, Jinxiang

IPC分类号： H05B37/02

CPC分类号： H05B33/0815 ,  H02M1/36 ,  H05B33/0887 ,  H05B33/089 ,  Y02B20/341

摘要： The present disclosure provides a silicon-controlled rectifier (SCR)-compatible constant-voltage circuit. The circuit includes an input undervoltage control module, an overpower protection module, a controllable load module, and a power conversion module. Further, one terminal of a SCR is connected to the power conversion module, and another terminal of the SCR is connected to a power supply module. The input undervoltage control module, the overpower protection module, and the controllable load module are each connected in parallel between a first sampling point and the power conversion module, the first sampling point being arranged between the SCR and the power conversion module. The power conversion module is connected to a load module and is configured to convert electric signals provided by the power supply module to a constant voltage, the power conversion module providing the constant voltage to the load module. The input undervoltage control module is configured to control the power conversion module to start or stop power conversion based on a comparison between a voltage at the first sampling point and a first reference voltage. The overpower protection module is configured to control the power conversion module to start or stop power conversion based on a comparison between the voltage at the first sampling point and a second reference voltage. The controllable load module is configured to maintain the SCR to be on when the power conversion module stops power conversion.