White light light-emitting device

Details White light light-emitting device White light light-emitting device

2007-04-10

2007-04-10

Santiago, Mariceli (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S498000, C313S506000, C313S512000, C257S100000

Reexamination Certificate

active

10968878

ABSTRACT:
A white light light-emitting device includes a light-emitting chip, functioning as a light-emitting light source, and light emitted has a wavelength between 340 nm˜495 nm, a macromolecular organic polymer is utilized to form an organic phosphor layer by means of adhering by evaporation onto a surface of the light-emitting chip; and an encapsulated layer, which encloses the light-emitting chip and the organic phosphor layer. Light emitted from the light source of the light-emitting chip excites the organic phosphor layer, which is thus affected to emit a second light having a wavelength (between 530 nm˜580 nm) different from that of the light-emitting light source. Wavelengths of the second light and a portion of the light source are mutually mixed thereby forming a mixed light and being affected by a plurality of nanograde crystal grains within the encapsulated layer, thus attaining white light having superior uniformity and color rendering.

REFERENCES:
patent: 6605904 (2003-08-01), Jenekhe et al.
patent: 6844670 (2005-01-01), Kuma et al.
patent: 2006/0172147 (2006-08-01), Matsuura et al.

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