Lighting assembly
First Claim
1. A lighting assembly, comprising:
- a light guide having opposed major surfaces between which light propagates by total internal reflection, and side surfaces extending between the major surfaces; and
a light source at an apex region between two of the side surfaces of the light guide, the light source configured to input light to the light guide,wherein;
the side surfaces comprise a stepped reflective side surface extending from the apex region, and an output side surface extending from the apex region;
the stepped reflective side surface comprises a first reflective step closer to the apex region and a second reflective step further from the apex region;
the output side surface comprises a first output region closer to the apex region and a second output region further from the apex region;
the first reflective step of the stepped reflective side surface is configured to reflect a first portion of the light input to the light guide from the light source through the first output region of the output side surface;
the second reflective step of the stepped reflective side surface is configured to reflect a second portion of the light input to the light guide from the light source through the second output region of the output side surface at a larger output angle relative to the output side surface than the light output through the first output region of the output side surface; and
the second output region of the output side surface comprises segments oriented nominally normal to the reflected second portion of the light incident thereon.
2 Assignments
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Accused Products
Abstract
A lighting assembly includes a light guide and a light source. The light guide has opposed major surfaces and side surfaces extending between the major surfaces. The light source is at an apex region between two side surfaces and is configured to input light to the light guide. The side surfaces comprise a stepped reflective side surface extending from the apex region and comprising a first reflective step and a second reflective step, and an output side surface extending from the apex region and comprising a first output region and a second output region. The first reflective step is configured to reflect a first portion of input light through the first output region. The second step is configured to reflect a second portion of input light through the second output region. The second output region comprises segments oriented nominally normal to the reflected second portion of the light incident thereon.
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Citations
52 Claims
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1. A lighting assembly, comprising:
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a light guide having opposed major surfaces between which light propagates by total internal reflection, and side surfaces extending between the major surfaces; and a light source at an apex region between two of the side surfaces of the light guide, the light source configured to input light to the light guide, wherein; the side surfaces comprise a stepped reflective side surface extending from the apex region, and an output side surface extending from the apex region; the stepped reflective side surface comprises a first reflective step closer to the apex region and a second reflective step further from the apex region; the output side surface comprises a first output region closer to the apex region and a second output region further from the apex region; the first reflective step of the stepped reflective side surface is configured to reflect a first portion of the light input to the light guide from the light source through the first output region of the output side surface; the second reflective step of the stepped reflective side surface is configured to reflect a second portion of the light input to the light guide from the light source through the second output region of the output side surface at a larger output angle relative to the output side surface than the light output through the first output region of the output side surface; and the second output region of the output side surface comprises segments oriented nominally normal to the reflected second portion of the light incident thereon. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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Specification