Light engine with enhanced heat transfer using independent...

F - Mech Eng,Light,Heat,Weapons – 21 – V

Patent

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Details

F21V 29/00 (2006.01) F21K 99/00 (2010.01) F21S 2/00 (2006.01) H01L 33/00 (2010.01)

Patent

CA 2726881

A light emitting assembly (10) is fabricated by forming a continuous strip of aluminum heat sink (12) having a pair of fins (32) aligned with the side edges (20) and cutting the continuous strip into a plurality of elongated sections (18). The elongated sections (18) are disposed in spaced and generally parallel relationship to one another and separated by an elongated slot (26) so that adjacent elongated sections (18) are independent of one another. A plurality of light emitting diodes (24) are disposed on the mounting surface (14) of each elongated section (18). Bridges (28) constructed of a material different from the material of the heat sink (12) interconnect the elongated sections (18). An independent cover (52) is adhesively secured to the mounting surface (14) around the light emitting diodes (24) on each elongated section (18). A housing (56) spaced from the fins (32) is disposed over the assembly (10).

L'invention porte sur un ensemble électroluminescent (10), qui est fabriqué par la formation d'une bande continue d'un dissipateur de chaleur en aluminium (12) comportant une paire d'ailettes (32) alignées avec les bords latéraux (20), et par la découpe de la bande continue en une pluralité de sections allongées (18). Les sections allongées (18) sont disposées en relation espacée et globalement parallèle les unes par rapport aux autres, et sont séparées par une fente allongée (26) de telle sorte que des sections allongées adjacentes (18) sont indépendantes les unes des autres. Une pluralité de diodes électroluminescentes (24) sont disposées sur la surface de montage (14) de chaque section allongée (18). Des ponts (28), construits en un matériau différent de celui du matériau du dissipateur de chaleur (12), interconnectent les sections allongées (18). On fait adhérer un couvercle indépendant (52) par adhérence sur la surface de montage (14) autour des diodes électroluminescentes (24), sur chaque section allongée (18). Un boîtier (56), espacé des ailettes (32), est disposé sur l'ensemble (10).

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