Light-emitting device including photoluminescent layer

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United States of America Patent

PATENT NO 9880336
SERIAL NO

15215595

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Abstract

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A light-emitting device includes a photoluminescent layer, a light-transmissive layer located on the photoluminescent layer, and a multilayer mirror layered together with the photoluminescent layer and the light-transmissive layer. At least one of the photoluminescent layer and the light-transmissive layer has a submicron structure. The submicron structure has at least projections or recesses arranged perpendicular to the thickness direction of the photoluminescent layer. The photoluminescent layer emits light including first light having a wavelength λa in air. The distance Dint between adjacent projections or recesses and the refractive index nwav-a of the photoluminescent layer for the first light satisfy λa/nwav-aint<λa. A thickness of the photoluminescent layer, the refractive index nwav-a, and the distance Dint are set to limit a directional angle of the first light emitted from the light emitting surface.

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Patent Owner(s)

Patent OwnerAddress
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTDOSAKA JAPAN OSAKA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hashiya, Akira Osaka, JP 52 288
Hirasawa, Taku Kyoto, JP 64 609
Inada, Yasuhisa Osaka, JP 111 407
Nakamura, Yoshitaka Osaka, JP 221 1744
Nitta, Mitsuru Kyoto, JP 58 313
Yamaki, Takeyuki Nara, JP 58 579

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