SIDE EMITTING LED AND LENS
First Claim
1. A lens comprising:
- a bottom surface;
a reflecting surface;
a first refracting surface obliquely angled with respect to a central axis of the lens; and
a second refracting surface extending as a smooth curve from the bottom surface to the first refracting surface;
wherein light entering the lens through the bottom surface and directly incident on the reflecting surface is reflected from the reflecting surface to the first refracting surface and refracted by the first refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens, and wherein light entering the lens through the bottom surface and directly incident on the second refracting surface is refracted by the second refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens.
5 Assignments
0 Petitions
Accused Products
Abstract
A lens comprises a bottom surface, a reflecting surface, a first refracting surface obliquely angled with respect to a central axis of the lens, and a second refracting surface extending as a smooth curve from the bottom surface to the first refracting surface. Light entering the lens through the bottom surface and directly incident on the reflecting surface is reflected from the reflecting surface to the first refracting surface and refracted by the first refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens. Light entering the lens through the bottom surface and directly incident on the second refracting surface is refracted by the second refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens. The lens may be advantageously employed with LEDs, for example, to provide side-emitting light-emitting devices. A lens cap attachable to a lens is also provided.
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Citations
15 Claims
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1. A lens comprising:
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a bottom surface;
a reflecting surface;
a first refracting surface obliquely angled with respect to a central axis of the lens; and
a second refracting surface extending as a smooth curve from the bottom surface to the first refracting surface;
wherein light entering the lens through the bottom surface and directly incident on the reflecting surface is reflected from the reflecting surface to the first refracting surface and refracted by the first refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens, and wherein light entering the lens through the bottom surface and directly incident on the second refracting surface is refracted by the second refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens. - View Dependent Claims (2, 3, 4, 5)
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6. A light-emitting device comprising:
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a light-emitting semiconductor device; and
a lens comprising;
a bottom surface;
a reflecting surface;
a first refracting surface obliquely angled with respect to a central axis of the lens; and
a second refracting surface extending as a smooth curve from the bottom surface to the first refracting surface;
wherein light emitted by the semiconductor device, entering the lens through the bottom surface, and directly incident on the reflecting surface is reflected from the reflecting surface to the first refracting surface and refracted by the first refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens, and wherein light emitted by the semiconductor device, entering the lens through the bottom surface, and directly incident on the second refracting surface is refracted by the second refracting surface to exit the lens in a direction substantially perpendicular to the central axis of the lens. - View Dependent Claims (7, 8, 9, 10)
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11. A lens cap comprising:
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a bottom surface attachable to a lens;
a reflecting surface;
a first refracting surface obliquely angled with respect to a central axis of the lens cap; and
a second refracting surface extending as a smooth curve from the bottom surface to the first refracting surface;
wherein light entering the lens cap through the bottom surface and directly incident on the reflecting surface is reflected from the reflecting surface to the first refracting surface and refracted by the first refracting surface to exit the lens cap in a direction substantially perpendicular to the central axis of the lens, and wherein light entering the lens cap through the bottom surface and directly incident on the second refracting surface is refracted by the second refracting surface to exit the lens cap in a direction substantially perpendicular to the central axis of the lens cap. - View Dependent Claims (12, 13, 14, 15)
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Specification