Semiconductor light emitting apparatus and its manufacturing method
First Claim
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1. A semiconductor light emitting apparatus comprising:
- a semiconductor light emitting device;
a resin that seals the semiconductor light emitting device; and
antireflective coating provided on a surface of the resin, the antireflective coating being made of material having an intermediate refractive index between the refractive index of the resin and the refractive index of air,wherein the antireflective coating is provided with a film thickness that generally conforms to an equation;
T=(m−
½
)λ
/2nwhere λ
is a wavelength of light, m is an integer, n is the refractive index of the antireflective coating, and T is the film thickness.
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Abstract
A semiconductor light emitting apparatus comprises: a semiconductor light emitting device; resin that seals the semiconductor light emitting device; and antireflective coating provided on a surface of the resin. The antireflective coating is made of material having an intermediate refractive index between the refractive index of the resin and the refractive index of air.
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Citations
6 Claims
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1. A semiconductor light emitting apparatus comprising:
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a semiconductor light emitting device; a resin that seals the semiconductor light emitting device; and antireflective coating provided on a surface of the resin, the antireflective coating being made of material having an intermediate refractive index between the refractive index of the resin and the refractive index of air, wherein the antireflective coating is provided with a film thickness that generally conforms to an equation;
T=(m−
½
)λ
/2nwhere λ
is a wavelength of light, m is an integer, n is the refractive index of the antireflective coating, and T is the film thickness.- View Dependent Claims (2, 3, 4, 5, 6)
where n0 is the refractive index of the air, and n2 is the refractive index of the resin.
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4. The semiconductor light emitting apparatus as claimed in claim 1, wherein the antireflective coating is made from a material selected from a group consisting of polymers, oxides and fluorides.
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5. The semiconductor light emitting apparatus as claimed in claim 1, wherein the resin has a light extraction surface that controls a distribution of a light emitted from the semiconductor light emitting device.
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6. The semiconductor light emitting apparatus as claimed in claim 1, further comprising a fluorescent material that absorbs a light emitted from the semiconductor light emitting device and converts its wavelength.
Specification