LED-based lighting network power control methods and apparatus
First Claim
1. A network, comprising:
- a distributed DC voltage to provide a power source to the network;
at least first and second apparatus coupled to the distributed DC voltage, each of the first and second apparatus including;
at least one first LED configured to generate first radiation having a first spectrum; and
a first feed-forward driver coupled to the at least one first LED and configured to control a first intensity of the first radiation without monitoring or regulating a first voltage or a first current provided to the at least one first LED; and
at least one network controller, coupled to each of the first and second apparatus, to generate at least one radiation control signal that includes information representing the first intensity of the first radiation generated by each of the first and second apparatus.
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Abstract
Multiple lighting apparatus coupled together to form a lighting network, in which operating power is efficiently provided throughout the network based on a distributed DC voltage or a distributed AC voltage. Based on various power driver configurations, each lighting apparatus incorporates one or more power drivers for one or more LED-based loads. In one example, a controlled predetermined power is provided to a load without requiring any feedback information from the load (i.e., without monitoring a load voltage and/or load current). In another example, a “feed-forward” power driver for an LED-based light sources combines the functionality of a DC-DC converter and a light source controller, and is configured to control the intensity of light generated by the light source based on modulating the average power delivered to the light source in a given time period, without monitoring and/or regulating the voltage or current provided to the light source. In various examples, significantly streamlined circuits having fewer components, higher overall power efficiencies, and smaller space requirements are realized.
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Citations
66 Claims
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1. A network, comprising:
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a distributed DC voltage to provide a power source to the network;
at least first and second apparatus coupled to the distributed DC voltage, each of the first and second apparatus including;
at least one first LED configured to generate first radiation having a first spectrum; and
a first feed-forward driver coupled to the at least one first LED and configured to control a first intensity of the first radiation without monitoring or regulating a first voltage or a first current provided to the at least one first LED; and
at least one network controller, coupled to each of the first and second apparatus, to generate at least one radiation control signal that includes information representing the first intensity of the first radiation generated by each of the first and second apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method, comprising acts of:
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A) distributing a DC supply voltage to at least first and second apparatus to provide a power source;
B) in each of the first and second apparatus, generating first radiation having a first spectrum from at least one first LED;
C) transmitting to both the first and second apparatus at least one radiation control signal that includes information representing a first intensity of the first radiation generated by each of the first and second apparatus; and
D) in each of the first and second apparatus, controlling the first intensity of the first radiation, in response to the at least one radiation control signal, without monitoring or regulating a first voltage or a first current provided to the at least one first LED. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A network, comprising:
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a distributed AC line voltage;
at least first and second apparatus coupled to the distributed AC line voltage, each of the first and second apparatus including;
at least one first LED configured to generate first radiation having a first spectrum; and
a first feed-forward driver coupled to the at least one first LED and configured to control a first intensity of the first radiation without monitoring or regulating a first voltage or a first current provided to the at least one first LED; and
at least one network controller, coupled to each of the first and second apparatus, to generate at least one radiation control signal that includes information representing the first intensity of the first radiation generated by each of the first and second apparatus. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. A method, comprising acts of:
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A) distributing an AC line voltage to at least first and second apparatus;
B) in each of the first and second apparatus, generating first radiation having a first spectrum from at least one first LED;
C) transmitting to both the first and second apparatus at least one radiation control signal that includes information representing a first intensity of the first radiation generated by each of the first and second apparatus; and
D) in each of the first and second apparatus, controlling the first intensity of the first radiation, in response to the at least one radiation control signal, without monitoring or regulating a first voltage or a first current provided to the at least one first LED. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66)
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Specification