UNITARY LIGHTGUIDE
First Claim
1. A unitary lightguide extending along mutually orthogonal first and second directions and comprising:
- a first lightguide section extending along the first direction between opposing first and second ends of the first lightguide section and having a minimum length L1 along the first direction and a maximum width W1 along the second direction, L1/W1≥
10;
a second lightguide section extending along the second direction and comprising;
a minimum length L2 along the second direction and a maximum width W2 along the first direction; and
a plurality of light extractors for extracting light that would otherwise propagate within and along the second lightguide section; and
a boundary region disposed between and joining the first and second lightguide sections, the boundary region substantially coextensive in length with the length of the first lightguide section and the width of the second lightguide section, the boundary region comprising a plurality of spaced apart light redirecting features, each light redirecting feature comprising;
a first portion extending substantially parallel to the first direction between first and second ends of the first portion; and
a second portion extending from proximate the first end of the first portion toward the second lightguide section between first and second ends of the second portion and making an angle with the first portion in a range from about 10 degrees to about 70 degrees, wherein the lightguide has a unitary construction.
1 Assignment
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Accused Products
Abstract
A unitary lightguide including a first lightguide section extending along a first direction and a second lightguide section extending along a second direction is described. The second lightguide section includes a plurality of light extractors for extracting light that would otherwise propagate within and along the second lightguide section. The unitary lightguide includes a boundary region disposed between and joining the first and second lightguide sections and including a plurality of spaced apart light redirecting features. Each light redirecting feature includes a first portion extending substantially parallel to the first direction, and a second portion extending from proximate the first end of the first portion toward the second lightguide section and making an angle with the first portion in a range from about 10 degrees to about 70 degrees.
0 Citations
20 Claims
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1. A unitary lightguide extending along mutually orthogonal first and second directions and comprising:
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a first lightguide section extending along the first direction between opposing first and second ends of the first lightguide section and having a minimum length L1 along the first direction and a maximum width W1 along the second direction, L1/W1≥
10;a second lightguide section extending along the second direction and comprising; a minimum length L2 along the second direction and a maximum width W2 along the first direction; and a plurality of light extractors for extracting light that would otherwise propagate within and along the second lightguide section; and a boundary region disposed between and joining the first and second lightguide sections, the boundary region substantially coextensive in length with the length of the first lightguide section and the width of the second lightguide section, the boundary region comprising a plurality of spaced apart light redirecting features, each light redirecting feature comprising; a first portion extending substantially parallel to the first direction between first and second ends of the first portion; and a second portion extending from proximate the first end of the first portion toward the second lightguide section between first and second ends of the second portion and making an angle with the first portion in a range from about 10 degrees to about 70 degrees, wherein the lightguide has a unitary construction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A unitary lightguide comprising:
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a first lightguide section having a major surface having an area A1; a second lightguide section having a major surface having an area A2≥
A1; anda row of spaced apart light redirecting features formed in the unitary lightguide and separating the first and second lightguide sections from each other, each light redirecting feature having a polygonal prism shape having a plurality of sides, each side of the polygonal prism substantially planar making an angle of less than about 20 degrees with a normal to the unitary lightguide. - View Dependent Claims (11, 12, 13, 14)
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15. A unitary lightguide comprising a row of spaced apart first light redirecting recesses formed in the unitary lightguide spaced from and generally along a first edge of the unitary lightguide, the first light redirecting recesses dividing the lightguide into a first lightguide section having a major surface having an area A1 and a second lightguide section having a major surface having an area A2≥
- A1, each first light redirecting recess comprising first and second adjacent sides, each side substantially perpendicular to the unitary lightguide and extending into the unitary lightguide to a depth that is at least 0.5 times a local thickness of the unitary lightguide, the first, but not the second, side substantially parallel to the first edge.
- View Dependent Claims (16, 17, 18, 19, 20)
Specification