Light source having LED arrays for direct operation in alternating current network and production method therefor

摘要

To allow a direct connection of a light source to a 230V/50 Hz or 120V/60 Hz AC network and to ensure safe operation and easy adaptation to user requirements when mounting, the light source includes a series connection which is connected to a bridge rectifier (GL) and includes at least two LED arrays strands, which have several interconnected individual LEDs, and a pre-resistor, which are arranged on a plate-like, electrically contacting carrier that dissipates heat, has protection against contact and carries the at least two array-LED-strands. For direct operation in an AC voltage supply, the sum of the flow voltages of the LED arrays (U1 . . . Un) is dimensioned such that it is equivalent to at least 75%, preferably 80% and a maximum of 85% of the amplitude of the rectified AC voltage at the nominal voltage, and that the array-LED-strand will be conductive if crossing the sum of flow voltages.

主权项

1. A light source comprising:
an array-LED-strand comprising a series connection of at least two array LEDs, each including a plurality of interconnected individual LEDs; a rectifier circuit as a power source for the array-LED strand, which in operation is connected to an AC voltage network, the rectifier circuit comprising a bridge rectifier; and a series resistor; wherein the bridge rectifier, the series connection of at least two array LEDs, and the series resistor are arranged on a plate-like, electrically contacted, heat dissipating and contact protection carrier supporting at least the array LEDs, and wherein, for direct operation on said AC voltage network, the sum of the forward voltages of the array LEDs is dimensioned so that said is equivalent to at least 75% and a maximum of 85% of the amplitude of the rectified AC voltage at a nominal voltage, and wherein the array-LED-strand is only conductive when the sum of flow voltages is crossing.