Road lighting
AssigneeLumileds LLC
InventorsMichael Camras, Jyoti Kiron Bhardwaj
Life of this patent
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Abstract
Systems, devices, and methods are disclosed in which one or more light sources, a detector, a processor and a controller are configured such that light from the one or more light sources improves the ability of a human or automated motor vehicle driver to identify and avoid pedestrians. The one or more light sources may provide spot illumination to moving objects or pedestrians on a road surface, with the spot illumination following the moving object or pedestrians along the portion of the road surface. The one or more light sources may project images on the ground or on other surfaces. The light source may be carried by a pedestrian or on personal transport used by a pedestrian. The light sources may be stationary and provide lighting for a pedestrian street crossing.
Claims22
A road lighting system deployed on or near a roadway, the road lighting system comprising:
- one or more light sources;
- one or more detectors arranged to detect a pedestrian on or near the roadway;
- a processor configured to receive and process signals from the one or more detectors;
- and
- a controller configured to receive signals from the processor and in response control the one or more light sources to illuminate a portion of the road surface and to provide spot illumination to the pedestrian that tracks the pedestrian as the pedestrian moves on or near the roadway, the spot illumination of the pedestrian comprises a spot of reduced horizontal illuminance in a plane parallel to the roadway that provides increased visual contrast and that surrounds and tracks the pedestrian.
A road lighting system deployed on or near a roadway, the road lighting system comprising:
- one or more light sources comprising an LED array;
- one or more detectors arranged to detect a pedestrian on or near the roadway;
- a processor configured to receive and process signals from the one or more detectors;
- a controller configured to receive signals from the processor and in response control pixels in the LED array in the light source to provide spot illumination to the pedestrian that tracks the pedestrian as the pedestrian moves on or near the roadway, the spot illumination of the pedestrian comprising a vertical illuminance component in a plane perpendicular to the roadway that tracks the pedestrian and a horizontal illuminance component in a plane parallel to the roadway that tracks the pedestrian, the horizontal illuminance component having a different intensity from the vertical illuminance component.
A road lighting system deployed on or near a roadway, the road lighting system comprising:
- one or more light sources comprising an LED array;
- one or more detectors arranged to detect a pedestrian on or near the roadway;
- a processor configured to receive and process signals from the one or more detectors;
- a controller configured to receive signals from the processor and in response control pixels in the LED array to provide illumination comprising a projection that tracks and at least partially surrounds the pedestrian as the pedestrian moves on or near the roadway, the projection comprising an image that tracks and at least partially surrounds the pedestrian as the pedestrian moves on or near the roadway and comprising information relating to the pedestrian.
Dependencies are inferred from the claim text.