Street lighting device
AssigneeOSRAM GmbH
InventorsAlessandro Bizzotto, Simone Capeleto, Matteo Toscan
Life of this patent
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Abstract
In various embodiments, a street lighting device with a first light source for illuminating the street plane from above is provided. The device may include a second light source located at a closer position to the street plane than said first light source; a sensor sensitive to the occurrence of conditions of reduced ambient visibility; and a controller connected to said sensor and capable of activating said second light source in the presence of said conditions of reduced ambient visibility.
Claims20
A street lighting device with a first light source for illuminating the street plane from above, the device comprising:
- a second light source located at a closer position to the street plane than said first light source;
- a sensor sensitive to the occurrence of conditions of reduced ambient visibility;
- and
- a controller connected to said sensor and capable of activating said second light source in the presence of said conditions of reduced ambient visibility,
- wherein said sensor is impinged upon by the light radiation emitted by said first light source and is capable of identifying the presence of said conditions of reduced ambient visibility when the intensity of the radiation emitted by said first light source and impinging upon said sensor falls below a given threshold level.
A street lighting device with a first light source for illuminating the street plane from above, the device comprising:
- a second light source located at a closer position to the street plane than said first light source;
- a sensor sensitive to the occurrence of conditions of reduced ambient visibility;
- and
- a controller connected to said sensor and capable of activating said second light source in the presence of said conditions of reduced ambient visibility, wherein said controller is configured for activating said second light source and reducing the intensity of the light radiation emitted by said first light source when said conditions of reduced ambient visibility are present.
Dependencies are inferred from the claim text.