Led light engine kernel and method of making the kernel

Details Led light engine kernel and method of making the kernel Led light engine kernel and method of making the kernel

H - Electricity

01

L

H01L 33/00 (2010.01) H01L 25/075 (2006.01)

Patent

CA 2716188

A light engine kernel for a light emitting diode (LED) includes a solid body of transparent material having an index of refraction of at least 1.5. The body has a domed, light-emitting top that is an inverted parabola of revolution, a reflective sidewall that is a compound parabolic concentrator (CPC), and a cavity at a focus of the CPC that is adapted to receive an LED. The domed top may include a phosphor coating of a yellow-emitting phosphor. The cavity may be adapted to receive only a single LED or plural LEDs of the same or different colors on a board. The kernel and LED are not integrally formed, reducing thermal degradation of the phosphor coating and improving application flexibility.

Noyau moteur de lumière pour une diode électroluminescente (DEL) comprenant un corps solide de matériau transparent dont l'indice de réfraction est d'au moins 1,5. Le corps comporte un sommet émetteur de lumière en dôme qui est une parabole de révolution inversée, une paroi latérale réfléchissante qui est un miroir composé à foyer quasi-ponctuel (CPC) et une cavité à un foyer du CPC qui est adaptée pour recevoir une DEL. Le sommet en dôme peut comprendre un revêtement fluorescent d'une substance fluorescente émettant dans le jaune. La cavité peut être adaptée pour recevoir une seule ou plusieurs DEL de couleurs identiques ou différentes sur un tableau. Le noyau et la DEL ne sont pas formés intégralement, réduisant la dégradation thermique du revêtement fluorescent et améliorant la flexibilité de l'application.

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