SURFACE EMITTING DEVICE
First Claim
5. A surface emitting device comprising:
- a light guide comprising a circular portion and a light entrance portion protruding from an outer peripheral surface of the circular portion; and
a light source emitting light toward the light entrance portion,the circular portion comprising an emitting surface and a reflecting surface that face each other,wherein the inner peripheral surface of the circular portion has a groove with edges that face each other in the circumferential direction.
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Accused Products
Abstract
A surface emitting device is provided. The surface emitting device includes a light guide and a light source. The light guide includes a circular portion that curves light, and a light entrance portion that protrudes from the outer peripheral surface of the circular portion. The light source emits light toward the light entrance portion. The light source is disposed in a hollow formed in the center of the light entrance portion. The outer wall surface of the light entrance portion has a reflecting portion. The reflecting portion includes first and second reflecting surfaces that adjoin at an obtuse angle. Light of the light source heading from the inner wall surface to the outer wall surface of the light entrance portion is reflected by the reflecting portion so as to head into the circular portion.
52 Citations
9 Claims
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5. A surface emitting device comprising:
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a light guide comprising a circular portion and a light entrance portion protruding from an outer peripheral surface of the circular portion; and a light source emitting light toward the light entrance portion, the circular portion comprising an emitting surface and a reflecting surface that face each other, wherein the inner peripheral surface of the circular portion has a groove with edges that face each other in the circumferential direction. - View Dependent Claims (1, 2, 3, 4, 6, 7, 8)
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8-1. The surface emitting device according to claim 5, wherein the cross section of the groove converges outward so as to have a V shape.
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9. A method of emitting light from a surface emitting device, the method comprising:
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providing a light guide comprising a circular portion and a light entrance portion that protrudes from an outer peripheral surface of the circular portion; emitting light toward the light entrance portion; reflecting the emitted light into the circular portion.
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Specification