Light and light sensor
First Claim
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1. A system, comprising:
- an LED-based lighting device comprising;
a housing;
one or more light emitting diodes (LEDs) disposed within the housing; and
a connector coupled to an end of the housing, wherein the connector is configured to engage with a light socket;
a sensor configured to;
determine a brightness level of light during operation of the LED-based lighting device, andoutput a signal corresponding to the determined brightness level; and
a controller configured to estimate an efficiency of the one or more LEDs based on the signal.
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Abstract
An LED-based light includes one or more LEDs, a sensor arranged to detect a brightness level in an area resulting from the combination of light emitted by the LEDs with light from at least one ambient light source other than the LEDs, and operable to output a signal corresponding to the detected brightness level, a controller operable to regulate an amount of power provided to the LEDs in response to the signal, a light transmitting housing for the LEDs, the sensor and the controller and a connector shaped for connection with a light socket disposed at an end of the housing.
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Citations
21 Claims
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1. A system, comprising:
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an LED-based lighting device comprising; a housing; one or more light emitting diodes (LEDs) disposed within the housing; and a connector coupled to an end of the housing, wherein the connector is configured to engage with a light socket; a sensor configured to; determine a brightness level of light during operation of the LED-based lighting device, and output a signal corresponding to the determined brightness level; and a controller configured to estimate an efficiency of the one or more LEDs based on the signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method, comprising:
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providing, using a controller, a line voltage to one or more light emitting diodes (LEDs) of a LED-based light device; turning off the one or more LEDs during a period of time, wherein the period of time that the one or more LEDs are off corresponds to a zero-crossing of the line voltage, and wherein the period of time that the one or more LEDs are off is imperceptible to a human eye; determining, using a sensor, a brightness level of light during operation of the LED-based lighting device, wherein determining the brightness level of light comprises detecting at least an amount of light emitted by the one or more LEDs and an amount of light emitted by one or more ambient light sources other than the one more LEDs, and wherein the amount of light emitted by the one or more ambient light sources is detected during the period of time that the one or more LEDs are off; outputting a signal corresponding to the determined brightness level; estimating, using the controller, an efficiency of the one or more LEDs based on the signal, wherein estimating the efficiency of one or more LEDs comprises estimating the efficiency of the one or more LEDs based on a comparison of a brightness level detected by the sensor while the one or more LEDs are on with a reference brightness level. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method, comprising:
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determining, using a sensor, a brightness level of light during operation of an LED-based lighting device; outputting a signal corresponding to the determined brightness level; estimating, using a controller, an efficiency of one or more light emitting diodes (LEDs) of the LED-based lighting device based on the signal; determining, using the sensor, a brightness level of light in an area during operation of the LED-based lighting device and a second LED-based lighting device, wherein the LED-based lighting device and the second LED-based lighting device are each configured to produce light in the area; outputting a signal corresponding to the determined brightness level in the area; estimating, using the controller, an efficiency of the one or more LEDs of the LED-based lighting device and one or more second LEDs of the second LED-based lighting device based on the signal corresponding to the determined second brightness level in the area.
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Specification