MODULATED LIGHT DETECTION SYSTEM
First Claim
1. A lighting system comprising:
- a system light source that is at least partially powered by an electrical energy source, the system light source emitting system light when activated, the system light including modulation;
a sensor adapted to convert light received thereby into electrical signals, said sensor generating electrical signals having a modulated component when the system light impinges on the sensor, said sensor generating electrical signals having an non-modulated component when natural light impinges on the sensor;
a controller for selectively adjusting the flow of electrical energy between the electrical energy source and the system light source responsive to the electrical signals from the sensor, said controller adjusting the flow of electrical energy in response to the non-modulated component and not adjusting the flow of electrical energy in response to the modulated component.
1 Assignment
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Accused Products
Abstract
A lighting system distinguishes between light from natural and manmade sources to prevent the system'"'"'s light source from being inadvertently deactivated due to light received from manmade light sources. A sensor converts received light into electrical energy. The system light source and/or some other external light source can emit light with a modulation. The system includes a modulation detector that can detect the modulation in the electrical energy received from the sensor. A system controller selectively adjusts the flow of electrical energy to the system light source responsive to the electrical signals from the sensor. The controller adjusts the flow of electrical energy in response to the non-modulated component of the electrical signals from the sensor. The controller does not adjust the flow of electrical energy in response to the modulated component of the electrical signals from the sensor.
6 Citations
28 Claims
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1. A lighting system comprising:
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a system light source that is at least partially powered by an electrical energy source, the system light source emitting system light when activated, the system light including modulation; a sensor adapted to convert light received thereby into electrical signals, said sensor generating electrical signals having a modulated component when the system light impinges on the sensor, said sensor generating electrical signals having an non-modulated component when natural light impinges on the sensor; a controller for selectively adjusting the flow of electrical energy between the electrical energy source and the system light source responsive to the electrical signals from the sensor, said controller adjusting the flow of electrical energy in response to the non-modulated component and not adjusting the flow of electrical energy in response to the modulated component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A lighting system comprising:
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a system light source that is at least partially powered by an electrical energy source; a sensor adapted to convert light received thereby into electrical signals, the sensor receiving light from an external manmade light source that emits light including a modulation such that the electrical signals generated by the sensor include at least a modulated component; a controller for selectively adjusting the flow of electrical energy between the electrical energy source and the system light source responsive to the electrical signals from the sensor, said controller adjusting the flow of electrical energy in response to the non-modulated component and not adjusting the flow of electrical energy in response to the modulated component. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification