Light-emitting diode

Details Light-emitting diode Light-emitting diode

2005-05-31

2005-05-31

Williams, Joseph (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S498000, C313S504000

Reexamination Certificate

active

06900587

ABSTRACT:
In an LED, when electric power is supplied to a blue light-emitting element through a pair of leads, light is emitted upward from an upper surface of the blue light-emitting element and, at the same time, light is radiated from side and lower surfaces of the blue light-emitting element so that a fluorescent substance is irradiated with the light. The latter light is reflected by a front surface of the fluorescent substance or by a concave reflecting mirror serving as a highly reflective material, so that the reflected light is radiated upward as excitation light (fluorescence) or as irradiation light. Because a radiating surface of a convex lens is formed above the concave reflecting mirror, the excitation light and irradiation light emitted thus are condensed by the convex lens and radiated externally with high external radiation efficiency.

REFERENCES:
patent: 5959316 (1999-09-01), Lowery
patent: 6340824 (2002-01-01), Komoto et al.
patent: 6417019 (2002-07-01), Mueller et al.
patent: 6521915 (2003-02-01), Odaki et al.
patent: 11-068166 (1999-03-01), None
patent: 11-274572 (1999-10-01), None

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