High powered light emitter packages with compact optics

Details High powered light emitter packages with compact optics High powered light emitter packages with compact optics

H - Electricity

01

L

H01L 33/00 (2006.01)

Patent

CA 2523544

A light emitter includes a supporting surface, a light source positioned on the spreader region, and an encapsulant positioned on the spreader region to surround the light source. The encapsulant is capable of expanding and contracting along the surface of the spreader region in response to a change in temperature so that forces caused by differences in the coefficient of thermal expansion between the different components is minimized. One or more reflective elements can be positioned proximate to the light source to increase the light emitting efficiency of the light emitter. The reflective elements can include the a reflective layer on the spreader region and/or a reflective layer on a portion of the encapsulant.

La présente invention concerne un photoémetteur comportant une surface support, une source de lumière disposée dans la zone d'étalement, et un encapsulant disposé sur la zone d'étalement de façon à entourer la source de lumière. L'encapsulant est capable de se dilater et de se contracter le long de la surface de la zone d'étalement en réaction à des variations de température, de façon à minimiser les forces issues des différences de coefficient de dilatation entre les différents composants. Un ou plusieurs éléments réfléchissants peuvent être disposés au voisinage de la source de lumière de façon à augmenter la puissance d'émission du photoémetteur. Les éléments réfléchissants peuvent comporter une couche réfléchissante sur la zone de dispersion et/ou une couche réfléchissante sur une partie de l'encapsulant.

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