Luminary control system adapted for reproducing the color of a known light source
First Claim
1. A light source comprising:
- a light generator that generates a first light signal of a first wavelength and a first intensity that is set by a first control signal and a second light signal at a second wavelength and a second intensity that is set by a second control signal;
a light monitor that generates a first monitor signal having an amplitude determined by said first intensity and a second monitor signal having an amplitude determined by said second intensity;
a target signal generator having a port for receiving a target light signal, said target signal generator generating a first target signal having an amplitude indicative of a first target value and a second target signal having an amplitude indicative of a second target value from said target light signal;
a feedback controller that generates said first and second control signals such that said first and second monitor signals have a fixed relationship to said first and second target signals, respectively.
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Accused Products
Abstract
A light source and method for programming the light source to provide a color that approximates that of a target light source are disclosed. The light source generates light at first and second wavelengths with intensities that are determined by first and second control signals that are set by a feedback controller that matches the outputs of a monitoring circuit to target signals. The target signals are generated from target values that are entered into the feedback controller by exposing the light source to the target light source and observing the outputs from a set of photodetectors incorporated in the light source. In one embodiment, the photodetectors in the monitoring circuit are used for this programming function.
27 Citations
15 Claims
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1. A light source comprising:
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a light generator that generates a first light signal of a first wavelength and a first intensity that is set by a first control signal and a second light signal at a second wavelength and a second intensity that is set by a second control signal; a light monitor that generates a first monitor signal having an amplitude determined by said first intensity and a second monitor signal having an amplitude determined by said second intensity; a target signal generator having a port for receiving a target light signal, said target signal generator generating a first target signal having an amplitude indicative of a first target value and a second target signal having an amplitude indicative of a second target value from said target light signal; a feedback controller that generates said first and second control signals such that said first and second monitor signals have a fixed relationship to said first and second target signals, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A light source comprising:
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a light generator that generates a first light signal of a first wavelength and a first intensity that is set by a first control signal and a second light signal at a second wavelength and a second intensity that is set by a second control signal; a light monitor that generates a first monitor signal having an amplitude determined by said first intensity and a second monitor signal having an amplitude determined by said second intensity; a target signal generator having a port for receiving a target light signal, said target signal generator generating a first target signal having an amplitude indicative of a first target value and a second target signal having an amplitude indicative of a second target value from said target light signal; a feedback controller that generates said first and second control signals such that said first and second monitor signals have a fixed relationship to said first and second target signals, respectively; wherein said light monitor comprises a first monitor photodetector that generates a signal having a first functional relationship to the intensity of light received by said first monitor photodetector at said first wavelength and wherein said target signal generator comprises a first target photodetector that generates a signal having said first functional relationship to the intensity of light received by said first target photodetector at said first wavelength. - View Dependent Claims (10, 11, 12)
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13. A method for controlling a light source that generates a first light signal of a first wavelength and a first intensity that is set by a first control signal and a second light signal at a second wavelength and a second intensity that is set by a second control signal, said method comprising:
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monitoring said first and second light signals to generate first and second monitor light signals having amplitudes determined by said first and second intensities, respectively; adjusting said first and second control signals such that said first and second monitor signals have a fixed relationship to said first and second target signals, respectively, wherein said first and second target signals are generated from first and second target values that are generated by exposing said light source to a target light signal. - View Dependent Claims (14, 15)
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Specification