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    ILLUMINATION SYSTEM COMPRISING A PLURALITY OF LEDS
    1.
    发明公开
    ILLUMINATION SYSTEM COMPRISING A PLURALITY OF LEDS 审中-公开

    公开(公告)号：EP3512304A1

    公开(公告)日：2019-07-17

    申请号：EP19154669.6

    申请日：2011-11-15

    申请人： Philips Lighting Holding B.V.

    发明人： SEMPEL, Adrianus

    IPC分类号： H05B33/08

    摘要： An illumination system comprises:
    - an LED driver for generating a controllable output voltage, the driver having two output terminals coupled to the two input terminals of an LED system for providing the output voltage to the LED system, and
    - the LED system comprising:
    - a first group of LEDs having a first group threshold voltage;
    - a second group of LEDs having a second group threshold voltage;
    - passive current distribution means in the form of a passive impedance, coupled only in series with the first LED group; and
    - two input terminals, wherein the first group of LEDs in series with the passive current distribution means is coupled in parallel with the second group of LEDs and wherein the parallel combination is coupled between the two input terminals;

    wherein the first group threshold voltage is smaller than the second group threshold voltage, and
    wherein the passive impedance is sufficiently large such that a current of the first group of LEDs will not be determined by an LED characteristic of the first group of LEDs