Ambient light regulation methods
First Claim
Patent Images
1. A lighting fixture comprising:
- an ambient light sensor configured to provide an ambient light sensor output;
a solid-state light source; and
control circuitry coupled to the ambient light sensor and the solid-state light source and configured to;
read the ambient light sensor output to obtain one or more initial ambient light level measurements;
determine a setpoint for the ambient light sensor output based on the one or more initial ambient light level measurements, the setpoint corresponding with a light intensity detected by the ambient light sensor;
determine a first value that is below the setpoint for the ambient light sensor output and a second value that is above the setpoint for the ambient light sensor output;
independently drive the solid-state light source to an output dimming level such that the ambient light sensor output falls between the first value and the second value; and
adjust the setpoint when changes to a drive current signal are detected while the ambient light sensor output falls between the first value and the second value.
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Abstract
A lighting fixture includes a solid-state light source and control circuitry. The control circuitry is configured to receive one or more ambient light level measurements corresponding to the amount of ambient light detected by an ambient light sensor, and determine a range of values for the one or more ambient light level measurements corresponding to a desired amount of light detected by the ambient light sensor. The control circuitry is then configured to drive the solid-state light source such that the one or more ambient light level measurements received from the ambient light sensor fall within the determined range of values.
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Citations
58 Claims
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1. A lighting fixture comprising:
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an ambient light sensor configured to provide an ambient light sensor output; a solid-state light source; and control circuitry coupled to the ambient light sensor and the solid-state light source and configured to; read the ambient light sensor output to obtain one or more initial ambient light level measurements; determine a setpoint for the ambient light sensor output based on the one or more initial ambient light level measurements, the setpoint corresponding with a light intensity detected by the ambient light sensor; determine a first value that is below the setpoint for the ambient light sensor output and a second value that is above the setpoint for the ambient light sensor output; independently drive the solid-state light source to an output dimming level such that the ambient light sensor output falls between the first value and the second value; and adjust the setpoint when changes to a drive current signal are detected while the ambient light sensor output falls between the first value and the second value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A lighting fixture network comprising a plurality of lighting fixtures and each of the plurality of lighting fixtures comprises:
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an ambient light sensor configured to provide an ambient light sensor output; a solid-state light source; and control circuitry coupled to the solid-state light source and configured to; read the ambient light sensor output to obtain one or more initial ambient light level measurements; determine a setpoint for the ambient light sensor output based on the one or more initial ambient light level measurements, the setpoint corresponding with a light intensity detected by the ambient light sensor; and independently adjust the setpoint based on changes to a drive current signal provided to the solid-state light source such that each of the plurality of light fixtures operates independently from others while providing light in a concerted fashion. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A lighting fixture network comprising a plurality of lighting fixtures and each of the plurality of lighting fixtures comprises:
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an ambient light sensor configured to provide an ambient light sensor output; a solid-state light source; and control circuitry configured to; read the ambient light sensor output to obtain one or more initial ambient light level measurements; determine a setpoint for the ambient light sensor output based on the one or more initial ambient light level measurements, the setpoint corresponding with a light intensity detected by the ambient light sensor; determine a first value that is below the setpoint for the ambient light sensor output and a second value that is above the setpoint for the ambient light sensor output; and independently adjust one or more of the first value and the second value based on changes to a drive current signal provided to the solid-state light source such that each of the plurality of light fixtures operates independently from others while providing light in a concerted fashion. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method of operating a lighting fixture including a solid-state light source comprising:
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reading an ambient light sensor output from an ambient light sensor to obtain one or more initial ambient light level measurements; determining a setpoint for the ambient light sensor output based on the one or more initial ambient light level measurements, the setpoint corresponding with a light intensity detected by the ambient light sensor; determining a first value that is below the setpoint for the ambient light sensor output and a second value that is above the setpoint for the ambient light sensor output; independently driving the solid-state light source to an output dimming level such that the ambient light sensor output falls between the first value and the second value; and adjusting the setpoint when changes to a drive current signal are detected while the ambient light sensor output falls between the first value and the second value. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A method of operating a lighting fixture network comprising a plurality of lighting fixtures and each of the plurality of lighting fixtures includes a solid-state light source, the method comprising:
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reading an ambient light sensor output from an ambient light sensor to obtain one or more initial ambient light level measurements; determining a setpoint for the ambient light sensor output based on the one or more initial ambient light level measurements, the setpoint corresponding with a light intensity detected by the ambient light sensor; and independently adjusting the setpoint based on changes to a drive current signal provided to the solid-state light source such that each of the plurality of light fixtures operates independently from others while providing light in a concerted fashion. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48)
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49. A method of operating a lighting fixture network comprising a plurality of lighting fixtures and each of the plurality of lighting fixtures includes a solid-state light source, the method comprising:
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reading an ambient light sensor output from an ambient light sensor to obtain one or more initial ambient light level measurements; determining a range of values for the ambient light sensor output based on the one or more initial ambient light level measurements, the range of values corresponding with a light intensity detected by the ambient light sensor; and independently adjusting the range of values based on changes to a drive current signal provided to the solid-state light source such that each of the plurality of light fixtures operates independently from others while providing light in a concerted fashion. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56, 57, 58)
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Specification