Ring-shaped light emitting unit
First Claim
1. A ring-shaped light emitting unit, comprising:
- a ring-shaped light guiding member comprising a light emitting surface which continues in a direction in which the ring-shaped light guiding member extends; and
a light guiding path for introducing light of a light source into the ring-shaped light guiding member connected to part of an outer circumference of the ring-shaped light guiding member,wherein the outer circumference, excluding a light inlet portion, of the ring-shaped light guiding member and an inner circumference of the ring-shaped light guiding member are truly round when viewed from a top of the ring-shaped light guiding member, andwherein a center of the inner circumference of the ring-shaped light guiding member is located closer to an open end of the light guiding path than a center of the outer circumference of the ring-shaped light guiding member.
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Accused Products
Abstract
A ring-shaped light emitting unit comprising a ring-shaped light guiding member having a light emitting surface which continues in a direction in which the ring-shaped light guiding unit extends, and a light guiding path for introducing light of a light source into the ring-shaped light guiding member which is continuously connected to part of an outer circumference of the ring-shaped light guiding member, wherein the outer circumference of the ring-shaped light guiding member excluding a light inlet portion is truly round. In addition, an inner circumference of the ring-shaped light guiding member is also truly round. A center of the inner circumference of the ring-shaped light guiding member is located closer to an open end of the light guiding path than a center of the outer circumference of the ring-shaped light guiding member.
16 Citations
19 Claims
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1. A ring-shaped light emitting unit, comprising:
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a ring-shaped light guiding member comprising a light emitting surface which continues in a direction in which the ring-shaped light guiding member extends; and a light guiding path for introducing light of a light source into the ring-shaped light guiding member connected to part of an outer circumference of the ring-shaped light guiding member, wherein the outer circumference, excluding a light inlet portion, of the ring-shaped light guiding member and an inner circumference of the ring-shaped light guiding member are truly round when viewed from a top of the ring-shaped light guiding member, and wherein a center of the inner circumference of the ring-shaped light guiding member is located closer to an open end of the light guiding path than a center of the outer circumference of the ring-shaped light guiding member. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19)
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2. A ring-shaped light emitting unit, comprising:
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a ring-shaped light guiding member comprising a light emitting surface which continues in a direction in which the ring-shaped light guiding member extends; and a light guiding path for introducing light of a light source into the ring-shaped light guiding member connected to part of an outer circumference of the ring-shaped light guiding member, wherein the outer circumference, excluding a light inlet portion, of the ring-shaped light guiding member and an inner circumference of the ring-shaped light guiding member are truly round when viewed from a top of the ring-shaped light guiding member, wherein a center of the inner circumference of the ring-shaped light guiding member is located closer to an open end of the light guiding path than a center of the outer circumference of the ring-shaped light guiding member, and wherein a distance between the center of the outer circumference of the ring-shaped light guiding member and the center of the inner circumference thereof is 2% to 10% per 100% of a diameter of the inner circumference thereof.
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3. A ring-shaped light emitting unit, comprising:
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a ring-shaped light guiding member comprising a light emitting surface which continues in a direction in which the ring-shaped light guiding member extends; and a light guiding path for introducing light of a light source into the ring-shaped light guiding member connected to part of an outer circumference of the ring-shaped light guiding member, wherein the outer circumference, excluding a light inlet portion, of the ring-shaped light guiding member and an inner circumference of the ring-shaped light guiding member are truly round when viewed from a top of the ring-shaped light guiding member, wherein a center of the inner circumference of the ring-shaped light guiding member is located closer to an open end of the light guiding path than a center of the outer circumference of the ring-shaped light guiding member, and wherein a distance between the center of the outer circumference of the ring-shaped light guiding member and the center of the inner circumference thereof is 0.5% to 8% per 100% of a diameter of the outer circumference thereof.
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12. A ring-shaped light emitting unit, comprising:
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a ring-shaped light guiding member comprising a light emitting surface which continues in a direction in which the ring-shaped light guiding member extends; and a light guiding path for introducing light of a light source into the ring-shaped light guiding member connected to part of an outer circumference of the ring-shaped light guiding member, wherein the outer circumference, excluding a light inlet portion, of the ring-shaped light guiding member and an inner circumference of the ring-shaped light guiding member are truly round when viewed from a top of the ring-shaped light guiding member, wherein a center of the inner circumference of the ring-shaped light guiding member is located closer to an open end of the light guiding path than a center of the outer circumference of the ring-shaped light guiding member, and wherein an inclined surface is formed on an inner surface side of the ring-shaped light guiding member. - View Dependent Claims (13)
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Specification