Optical semiconductor device
First Claim
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1. An optical semiconductor device comprising:
- an optical semiconductor chip capable of emitting light, the optical semiconductor chip having an upper surface and a side surface; and
an encapsulating light permeable member covering the optical semiconductor chip in contact with said upper and side surfaces and having a light emitting surface for emitting light coming out from the optical semiconductor chip to outside, the light emitting surface being larger than said upper surface of the semiconductor chip;
wherein the light emitting surface is irregular and includes a plurality of standing surfaces standing in a second direction which intersects a first direction in which the light emitting surface spreads; and
wherein each of the standing surfaces has a height and a width which are determined to satisfy an inequality H<
W×
tanα
c, wherein H is the height of the projection, W is the width of the projection, and α
c is a total reflection critical angle of the light permeable member.
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Abstract
An optical semiconductor device includes an optical semiconductor chip and a light permeable member covering the optical semiconductor chip. The light permeable member has a light emitting surface for emitting light coming out from the optical semiconductor chip to the outside. The light emitting surface includes a plurality of standing surfaces standing in a second direction which intersects a first direction in which the light emitting surface spreads.
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Citations
9 Claims
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1. An optical semiconductor device comprising:
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an optical semiconductor chip capable of emitting light, the optical semiconductor chip having an upper surface and a side surface; and an encapsulating light permeable member covering the optical semiconductor chip in contact with said upper and side surfaces and having a light emitting surface for emitting light coming out from the optical semiconductor chip to outside, the light emitting surface being larger than said upper surface of the semiconductor chip; wherein the light emitting surface is irregular and includes a plurality of standing surfaces standing in a second direction which intersects a first direction in which the light emitting surface spreads; and wherein each of the standing surfaces has a height and a width which are determined to satisfy an inequality H<
W×
tanα
c, wherein H is the height of the projection, W is the width of the projection, and α
c is a total reflection critical angle of the light permeable member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification