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

2011-03-01

2011-03-01

Pham, Thanh V (Department: 2894)

Active solid-state devices (e.g., transistors, solid-state diode

Incoherent light emitter structure

With reflector, opaque mask, or optical element integral...

C257S088000, C257SE33001, C257SE21001, C438S026000, C438S055000

Reexamination Certificate

active

07897985

ABSTRACT:
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.

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