Light emitting diode device

Details Light emitting diode device Light emitting diode device

2005-12-06

2005-12-06

Crane, Sara (Department: 2811)

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

Incoherent light emitter structure

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

C257S100000

Reexamination Certificate

active

06972439

ABSTRACT:
Disclosed herein is a light emitting diode (LED) device. The light emitting diode device comprises a package formed with a terminal for applying an electrical signal, one or more LED chips mounted on the package such that the LED chips are electrically connected to the terminal, a lens formed to surround the LED chips on the package for changing path of light emitted from the LED chips to the horizontal direction with the difference of the refraction rates of the media, and a reflector formed on the lens for reflecting the light, emitted above the lens without being refracted in the horizontal direction at the lens, to the horizontal direction. The LED device reflects the light, which is deviated from the optical design range of the lens and emitted above the lens, back to the lens, thereby preventing the hot spot from being generated, and enhancing horizontal emission efficiency of the light.

REFERENCES:
patent: 4638343 (1987-01-01), Althaus et al.
patent: 6674096 (2004-01-01), Sommers
patent: 6679621 (2004-01-01), West et al.
patent: 9-330604 (1997-12-01), None

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