LIGHT-EMITTING APPARATUS INCLUDING PHOTOLUMINESCENT LAYER
First Claim
1. A light-emitting apparatus comprising a photoluminescent layer that emits light in response to excitation light and has a light-emitting surface, the light from the photoluminescent layer being emitted through the light-emitting surface,wherein the light-emitting surface includes a first region and a second region,the light from the photoluminescent layer includes first light having a wavelength λ
- a in air, andthe first light emitted through the first region has a smaller directional angle than the first light emitted through the second region.
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Accused Products
Abstract
A light-emitting apparatus comprising a photoluminescent layer that emits light in response to excitation light and has a light-emitting surface, the light from the photoluminescent layer being emitted through the light-emitting surface. The light-emitting surface includes a first region and a second region. The light from the photoluminescent layer includes first light having a wavelength λa in air. The first light emitted through the first region has a smaller directional angle than the first light emitted through the second region.
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Citations
20 Claims
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1. A light-emitting apparatus comprising a photoluminescent layer that emits light in response to excitation light and has a light-emitting surface, the light from the photoluminescent layer being emitted through the light-emitting surface,
wherein the light-emitting surface includes a first region and a second region, the light from the photoluminescent layer includes first light having a wavelength λ -
a in air, and
the first light emitted through the first region has a smaller directional angle than the first light emitted through the second region. - View Dependent Claims (4, 5, 6, 7, 8, 9, 15, 16, 17, 19, 20)
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a in air, and
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2. A light-emitting apparatus comprising:
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a photoluminescent layer that emits light in response to excitation light; and a light transmissive layer that is located on the photoluminescent layer, wherein at least one of the photoluminescent layer and the light transmissive layer has a light-emitting surface, the light from the photoluminescent layer being emitted through the light-emitting surface, wherein the light-emitting surface includes a first region and a second region, the light from the photoluminescent layer includes first light having a wavelength λ
a in air, andthe first light emitted through the first region has a smaller directional angle than the first light emitted through the second region. - View Dependent Claims (3, 14, 18)
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10. A light-emitting apparatus comprising:
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a first light-emitting layer including a first photoluminescent layer, the first photoluminescent layer emitting light in response to excitation light; and a second light-emitting layer that is disposed on or above at least part of the first light-emitting layer and includes a second photoluminescent layer, the second photoluminescent layer emitting light in response to the excitation light passing through the first light-emitting layer, wherein the light from the first and second photoluminescent layers includes first light having a wavelength λ
a in air,one of the first and second light-emitting layers has a periodic structure extending along a plane parallel to the first or second photoluminescent layer, and the at least one periodic structure has projections or recesses or both, a refractive index nwav-a of the photoluminescent layer in one of the first and second light-emitting layers for the first light and a period pa of the periodic structure satisfy λ
a/nwav-a<
pa<
λ
a, andthe first light emitted through a surface of one of the first and second light-emitting layers has a smaller directional angle than the first light emitted through a surface of the other light-emitting layer. - View Dependent Claims (11, 12, 13)
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Specification