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    LIGHT GENERATING DEVICE
    5.
    发明公开
    LIGHT GENERATING DEVICE 有权
    灯说服力DEVICE

    公开(公告)号：EP2710861A1

    公开(公告)日：2014-03-26

    申请号：EP12725505.7

    申请日：2012-05-11

    申请人： Koninklijke Philips N.V. ,  Philips Intellectual Property & Standards GmbH

    发明人： HATTRUP, Christian ,  KAHLMAN, Henricus, Marius, Joseph, Maria ,  KURT, Ralph ,  SAUERLAENDER, Georg ,  HONTELE, Bertrand, Johan, Edward ,  TAO, Haimin

    IPC分类号： H05B33/08

    CPC分类号： H05B33/0824 ,  H05B33/0809 ,  H05B33/0815 ,  H05B33/083 ,  Y02B20/347

    摘要： A light generating device (1) is provided with at least a voltage input (21) adapted for receiving a variable voltage, at least three LED circuits (10), coupled with said voltage input (21), wherein each LED circuit (10) comprises a LED unit (14) and controllable current regulator (15) to control the current through said LED circuit (10). The light generating device (1) further comprises a controllable switch matrix (30) comprising a plurality of switches (25, 26, 27), said switch matrix (30) is configured to operate in at least three different switching modes and a controller (50), connected at least with said switch matrix (30), configured to determine said variable operating voltage and to control the switching mode of said switch matrix (30) in dependence of the determined operating voltage. To provide an efficient operation of such device (1) with a variable operating voltage, such as an AC voltage, in a first switching mode, said LED units (10) are connected parallel to each other, in a second switching mode, at least two of said LED units (10) are connected in series and in a third switching mode, said LED units 10 are connected in series with each other.

    INTERFACE CIRCUIT
    6.
    发明公开
    INTERFACE CIRCUIT 审中-公开
    接口电路

    公开(公告)号：EP2692208A1

    公开(公告)日：2014-02-05

    申请号：EP12715184.3

    申请日：2012-03-27

    申请人： Koninklijke Philips N.V. ,  Philips Intellectual Property & Standards GmbH

    发明人： LOEF, Christoph ,  TAO, Haimin

    IPC分类号： H05B33/08

    摘要： An interface circuit is disclosed for operating a light source from an electronic fluorescent driver. In one example, the interface circuit comprises input terminals for connection to lamp connection terminals of the electronic fluorescent lamp driver, a first string interconnecting a first pair of input terminals, a second string interconnecting a second pair of input terminals, a third string interconnecting a first terminal of the first string and a second terminal of the second string and comprising a rectifier, output terminals of said rectifier being coupled during operation to the light source. When a light source is operated making use of the interface circuit, a proper emulation of a fluorescent lamp is obtained.

    METHOD FOR OPERATING A POWER CONVERTER IN A SOFT-SWITCHING RANGE
    8.
    发明公开
    METHOD FOR OPERATING A POWER CONVERTER IN A SOFT-SWITCHING RANGE 有权
    用于操作电源转换器，软开关部区域和设备实施同样的方法

    公开(公告)号：EP1894291A1

    公开(公告)日：2008-03-05

    申请号：EP06756053.2

    申请日：2006-06-02

    申请人： Koninklijke Philips Electronics N.V.

    发明人： TAO, Haimin ,  KOTSOPOULOS, Andrew ,  DUARTE, Jorge, L. ,  HENDRIX, Machiel, A., M.

    IPC分类号： H02M3/335

    CPC分类号： H02M3/33584

    摘要： For converting a first DC voltage to a second DC voltage, a first bridge circuit comprised in a power converter is controlled to convert the first DC voltage to a first AC voltage. The first AC voltage is transformed to a second and possibly further AC voltage. The second and each possibly further AC voltage is converted to a DC voltage by respective bridge circuits. To increase efficiency of the power converter switches of the power converter are controlled to operate in soft switching. Thereto a duty cycle of each AC voltage is controlled. In an embodiment, a half-cycle voltage-time integral of each AC voltage is controlled to be substantially equal.

    OPERATING AN ELECTRODELESS DISCHARGE LAMP
    10.
    发明公开
    OPERATING AN ELECTRODELESS DISCHARGE LAMP 审中-公开
    一种操作无电极放电灯

    公开(公告)号：EP2476297A1

    公开(公告)日：2012-07-18

    申请号：EP10760040.5

    申请日：2010-09-03

    申请人： Koninklijke Philips Electronics N.V.

    发明人： TAO, Haimin

    IPC分类号： H05B41/24 ,  H05B41/28

    CPC分类号： H05B41/2806 ,  H05B41/24 ,  Y02B20/22

    摘要： A power driver circuit for an electrodeless discharge lamp comprises a push- pull class E converter comprising power supply terminals for receiving a DC supply voltage, and lamp output terminals for supplying power to an antenna of the lamp. The converter has a first switching leg and a second switching leg arranged in parallel between the power supply terminals. The first switching leg has a series arrangement of a first switching element and a first driver circuit inductor having a common first node. The second switching leg has a series arrangement of a second switching element and a second driver circuit inductor having a common second node. The lamp output terminals are coupled between the first node and the second node. A lamp impedance matching network is coupled between the first node and the second node, wherein the impedance matching network comprises at least one series resonant capacitor coupled in series with the lamp output terminals. A starting circuit comprises a series arrangement of a starting inductor and a starting capacitor coupled between a first starting circuit terminal and a second starting circuit terminal. The first starting circuit terminal is coupled between the first switching element of the power driver circuit and a first lamp output terminal. A node coupling the starting inductor and the starting capacitor is configured to be coupled to an ignition appendix of the lamp. A gate drive circuit is configured to supply a near-sinusoidal gate drive current.