Light turning device with prismatic light turning features
First Claim
1. A light guide apparatus, comprising:
- a light guide body formed of a light propagating material supporting propagation of light through a length of the light guide body, the light guide body defined by a plurality of exterior surfaces,wherein a first of the exterior surfaces comprises;
a first plurality of spaced-apart slits configured to redirect light incident on the light guide body, each slit of the first plurality of spaced-apart slits formed by an undercut in the first exterior surface; and
wherein a second of the exterior surfaces comprises;
a second plurality of spaced-apart slits configured to redirect light incident on the light guide body, each slit of the second plurality of spaced-apart slits formed by an undercut in the second exterior surface.
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Accused Products
Abstract
A light guide device includes a light guide body and two or more pluralities of spaced-apart slits. The slits are formed by undercuts in the light guide body. Sidewalls of the slits form facets that redirect light impinging on the facets. In some embodiments, the light guide body is attached to a light source. The light source emits light that is injected into the light guide body and the slits redirect the light out of the light guide body and towards a desired target. In some embodiments, the target is a display and a first plurality of slits directs light from the light source across the light guide body and over the face of the display. A second plurality of slits then directs light out of the light guide body and towards the display.
506 Citations
28 Claims
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1. A light guide apparatus, comprising:
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a light guide body formed of a light propagating material supporting propagation of light through a length of the light guide body, the light guide body defined by a plurality of exterior surfaces, wherein a first of the exterior surfaces comprises; a first plurality of spaced-apart slits configured to redirect light incident on the light guide body, each slit of the first plurality of spaced-apart slits formed by an undercut in the first exterior surface; and wherein a second of the exterior surfaces comprises; a second plurality of spaced-apart slits configured to redirect light incident on the light guide body, each slit of the second plurality of spaced-apart slits formed by an undercut in the second exterior surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An illumination apparatus, comprising:
- a light turning body;
a first means for generating light and directing the light to propagate through the light turning body;
a second means for redirecting the light propagating through the light turning body, wherein the second means includes a plurality of slits formed by undercuts in a first surface of the light turning body; and
a third means for redirecting the light propagating through the light turning body, wherein the third means includes a plurality of slits formed by undercuts in a second surface of the light turning body. - View Dependent Claims (22, 23, 24, 25)
- a light turning body;
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26. A method for illumination, comprising:
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propagating light through a light turning body; and redirecting the light by impinging the light on facets of a first and a second plurality of slits, the pluralities of slits formed by undercuts in two surfaces of the light turning body. - View Dependent Claims (27, 28)
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Specification