Electronically steerable light output viewing angles for traffic signals
First Claim
Patent Images
1. A steerable solid state light apparatus, comprising:
- a light apparatus including an array of solid state light sources generating a light beam;
optics disposed over each said solid state light source, and a control circuit individually electronically controlling the drive current of each solid state light source such that, in combination with said optics, said control circuit selectively adjusts a beam orientation of the light beam.
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Abstract
An electrically steerable solid state light apparatus is ideally suited for traffic controls. There exist many applications where a driver wishes limited viewing angles of traffic signals for safety, one example being left hand turn arrows. Current state of the art for solid state traffic signals involves the use of a mechanical louver to block the light from the unintended traffic lanes. This approach reduces the intensity of the light and customization of the viewing angle available to the DOT (Department of Transportation).
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Citations
18 Claims
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1. A steerable solid state light apparatus, comprising:
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a light apparatus including an array of solid state light sources generating a light beam;
optics disposed over each said solid state light source, and a control circuit individually electronically controlling the drive current of each solid state light source such that, in combination with said optics, said control circuit selectively adjusts a beam orientation of the light beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of electronically adjusting a beam angle of light generated by a solid state light apparatus comprising:
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a light apparatus including an array of solid state light sources generating a light beam;
optics disposed over each said solid state light source, and a control circuit individually electronically controlling the drive current of each solid state light source such that, in combination with said optics, said control circuit selectively adjusts a beam orientation of the light beam;
comprising the steps of;
said control circuit controlling said drive current of each said solid state light source to selectively adjust the beam orientation of said beam. - View Dependent Claims (15, 16, 17, 18)
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Specification