Multiple lightguide backlight
First Claim
1. A backlighting system, comprising:
- a first lightguide having an interior;
at least one light source optically connected to an edge of the first lightguide for supplying light into the interior thereof;
a first recycling enhancement structure disposed at and attached to a surface of the first lightguide;
a second lightguide having an interior;
a second recycling enhancement structure disposed between the first lightguide and the second lightguide;
at least one light source optically connected to an edge of the second lightguide for supplying light into the interior thereof; and
an extractor disposed at a surface of the second lightguide for diffuse extraction of light from the interior of the second lightguide;
wherein at least a portion of the light supplied into the interior of the second lightguide and then diffusely extracted therefrom enters the interior of the first lightguide through a substantially optically clear surface.
1 Assignment
0 Petitions
Accused Products
Abstract
The present disclosure is directed to backlighting systems, which include first and second lightguides, at least one light source optically connected to an edge of the first lightguide and at least one light source optically connected to an edge of the second lightguide for supplying light into their respective interiors. In the appropriate exemplary embodiments, the backlighting systems of the present disclosure include an extractor disposed at a surface of the second lightguide for diffuse extraction of light from the interior of the second lightguide. In such exemplary embodiments, at least a portion of the light supplied into the interior of the second lightguide and then diffusely extracted therefrom enters the interior of the first lightguide through a substantially optically clear surface. In some exemplary embodiments, the backlighting systems of the present disclosure include recycling enhancement structures, which may be attached to the first lightguide.
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Citations
24 Claims
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1. A backlighting system, comprising:
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a first lightguide having an interior; at least one light source optically connected to an edge of the first lightguide for supplying light into the interior thereof; a first recycling enhancement structure disposed at and attached to a surface of the first lightguide; a second lightguide having an interior; a second recycling enhancement structure disposed between the first lightguide and the second lightguide; at least one light source optically connected to an edge of the second lightguide for supplying light into the interior thereof; and an extractor disposed at a surface of the second lightguide for diffuse extraction of light from the interior of the second lightguide; wherein at least a portion of the light supplied into the interior of the second lightguide and then diffusely extracted therefrom enters the interior of the first lightguide through a substantially optically clear surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 13, 14, 15)
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10. A backlighting system, comprising:
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a first lightguide having an interior; at least one light source optically connected to an edge of the first lightguide for supplying light into the interior thereof; a second lightguide having an interior; at least one light source optically connected to an edge of the second lightguide for supplying light into the interior thereof; and an extractor disposed at a surface of the second lightguide for diffuse extraction of light from the interior of the second lightguide; wherein at least a portion of the light, supplied into the interior of the second lightguide and then diffusely extracted therefrom enters the interior of the first lightguide through a substantially optically clear surface, and wherein the first and second lightguides each comprise two opposing edges, at least one light source is optically connected to each of said edges, and the opposing edges of the first lightguide are not aligned with the opposing edges of the second lightguide.
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11. A backlighting system, comprising:
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a first lightguide having an interior; at least one light source optically connected to an edge of the first lightguide for supplying light into the interior thereof; a second lightguide having an interior; at least one light source optically connected to an edge of the second lightguide for supplying light into the interior thereof; and an extractor disposed at a surface of the second lightguide for diffuse extraction of light from the interior of the second lightguide; wherein at least a portion of the light supplied into the interior of the second lightguide and then diffusely extracted therefrom enters the interior of the first lightguide through a substantially optically clear surface, and wherein the first and second lightguides each comprise two adjacent edges, at least one light source is optically connected to each of said edges, and the adjacent edges of the first lightguide are not aligned with the adjacent edges of the second lightguide.
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12. A backlighting system, comprising:
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a first lightguide having an interior; a plurality of light sources optically connected to a first edge of the first lightguide and a plurality of light sources optically connected to a second edge of the first lightguide for supplying light into the interior thereof; a first recycling enhancement structure disposed at and attached to a surface of the first lightguide; a second lightguide having an interior; a second recycling enhancement structure disposed between the first lightguide and the second lightguide; a plurality of light sources optically connected to a first edge of the second lightguide and a plurality of light sources optically connected to a second edge of the second lightguide for supplying light into the interior thereof; and an extractor disposed at a surface of the second lightguide for diffuse extraction of light from the interior thereof; wherein at least a portion of the light supplied into the interior of the second lightguide and then diffusely extracted therefrom enters the interior of the first lightguide through a substantially optically clear surface. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification