Light emitting device
AssigneesSumitomo Electric Industries, Ltd., Rohm Co., Ltd.
InventorsHideki Matsubara, Toshihiko Takebe, Hiroki Ishinaga, Mamoru Maegawa
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Abstract
The present invention provide a light emitting device including: a resin base having a patterned interconnection; an n-type ZnSe substrate mounted on the resin base; an epitaxial light emission structure formed of a compound crystal relating to ZnSe serving as a matrix, formed on the ZnSe substrate and emitting light when an electric current is applied. A reflector is so constructed and positioned that a spatial distribution of the light emission intensity of the fluorescence light approximates the light emission intensity of the epitaxial light emission structure. The fluorescence light is produced in the ZnSe substrate excited by with the light emission from the epitaxial light emission structure.
Claims5
A light emitting device comprising:
- a base having an electrode;
- a substrate formed as an n-type ZnSe single crystal mounted on said base for emitting fluorescent light,
- an epitaxial light emission structure comprising a matrix formed as a compound crystal relating to ZnSe, wherein said epitaxial light emission structure is mounted on said substrate for emitting light when an electric current is passing through said epitaxial light emission structure;
- and
- a reflector positioned for matching a spatial light emission intensity of said epitaxial light emission structure to a spatial light emission intensity of said fluorescence light from said substrata when said substrate is excited by light emitted from said epitaxial light emission structure, and wherein said reflector has a varying optical reflectance for adjusting an intensity ratio between said light emission from the said epitaxial light emission structure and said fluorescence light emitted from said substrate.
The light emitting device 9claim 1, wherein said reflector is secured on said bas positioned around said substrate.
A light emitting device comprising:
- a base having an electrode,
- a substrate formed as an n-type ZnSe single crystal mounted on said base for emitting fluorescent light,
- an epitaxial light emission structure comprising a matrix formed as a compound crystal relating to ZnSe, wherein said epitaxial light emission structure is mounted on said substrate for emitting light when an electric current is passing through said epitaxial light emission structure;
- and
- a reflector positioned for matching a spatial light emission intensity of said epitaxial light emission structure to a spatial light emission intensity of said fluorescence light from said substrate when said substrate is excited by light emitted from said epitaxial light emission structure, and wherein said reflector includes a resin selected from the group consisting of white color resins, resin having a light scattering medium buried therein, and resin having a surface covered with a metal film, and wherein said base includes a printed circuit board formed of resin and having a patterned electrical connecting circuit on said base.
Dependencies are inferred from the claim text.