Light-emitting device and illuminator

Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – With reflector – opaque mask – or optical element integral...

Reexamination Certificate

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C257S094000, C257S081000, C257S079000

Reexamination Certificate

active

07078735

ABSTRACT:
A light-emitting device, having high light extraction efficiency, capable of obtaining diffused light is obtained. This light-emitting device comprises a light-emitting diode, a portion, formed on a plane substantially parallel to a light-emitting surface of the light-emitting diode, having a dielectric constant periodically modulated with respect to the in-plane direction of the plane substantially parallel to the light-emitting surface and a member provided on the side of the light-emitting surface of the light-emitting diode for diffusing light emitted from the light-emitting diode.

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patent: 5-1598 (1993-01-01), None
patent: 07-282609 (1995-10-01), None
“Proposal of 2-D Photonic Crystal Light Emitting Diode with Surface Grating,” Sep. 2001, p. 791, (in Japanese).
“Highly Directive Light Sources using Two-dimensional Photonic Crystal Slabs”, Applied Physics Letters, Dec. 2001, vol. 79, No. 26, pp. 4280-4282.
“Strongly Directional Emission from AlGaAs/GaAs Light-Emitting Diodes” Applied Physics Letters, Nov. 1990, vol. 57, No. 22, pp. 2327-2329.

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