| 摘要 |
The present invention is based on a regulation circuit ( 200 a, 200 b) for making available a constant current supply on the basis of a transformer principle, in which there flows through the luminescent diodes (D 1 , . . . ,DN) a triangular a.c. current (I<SUB>D</SUB>) varying periodically around a d.c. current value. With this method it is afforded by means of a circuitry provision that both the charging and also the discharging current (I<SUB>L1</SUB>) of an inductive reactance (X<SUB>L1</SUB>) connected in series to the luminescent diodes (D 1 , . . . ,DN), functioning as a storage choke (L 1 ) for filtering of mains harmonics, flows as diode current (I<SUB>D</SUB>) through the luminescent diodes (D 1 , . . . ,DN). The advantage of this method consists in a significant reduction of the overall power loss (P<SUB>V, ges</SUB>) of the LED illumination module ( 100 ). According to one exemplary embodiment of the invention the ceramic circuit board ( 102 ) of the LED illumination module ( 100 ) in accordance with the invention has a direct mains current supply ( 104, 108 ), which for protection from mechanical damage is accommodated in a transparent housing ( 106 ) having a highly transparent polymer mass ( 110 ) serving as optically active lens surface.
|
