Multi-lamp actuating facility
First Claim
1. A lamp actuating facility comprising:
- a plurality of lamps each including an output terminal, an inverter circuit coupled to said lamps, to convert electric power and to energize said lamps, a low frequency control unit coupled to said inverter circuit, to set an average current value at said output terminals of said lamps, and to control said inverter circuit, a plurality of current detecting units coupled between said lamps and said low frequency control unit respectively, to obtain the average current value at said output terminals of said lamps, and to send the average current value back to said low frequency control unit, and a plurality of regulating devices coupled between said lamps and said low frequency control unit respectively, to control electric power through said lamps, and to maintain each of said lamps at the average current value, each of said regulating devices including a transistor having a base coupled to said low frequency control unit, a collector coupled to electric power source, and an emitter grounded, and each of said regulating devices further including a switch coupled to said collector of said transistor, to control said lamps.
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Accused Products
Abstract
A lamp actuating device includes a number of lamps each having an output terminal, an inverter circuit coupled to the lamps to energize the lamps, a low frequency control unit coupled to the inverter circuit, to set an average value for the level of the effective lamp current at the output terminals of the lamps and to control the inverter circuit, a number of current detecting devices coupled between the lamps and the low frequency control devices to obtain and send the average current value at the output terminals of the lamps to the low frequency control unit. A number of regulating devices are coupled between the lamps and the low frequency control unit, to maintain each lamp at the predetermined average value of the effective current.
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Citations
7 Claims
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1. A lamp actuating facility comprising:
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a plurality of lamps each including an output terminal, an inverter circuit coupled to said lamps, to convert electric power and to energize said lamps, a low frequency control unit coupled to said inverter circuit, to set an average current value at said output terminals of said lamps, and to control said inverter circuit, a plurality of current detecting units coupled between said lamps and said low frequency control unit respectively, to obtain the average current value at said output terminals of said lamps, and to send the average current value back to said low frequency control unit, and a plurality of regulating devices coupled between said lamps and said low frequency control unit respectively, to control electric power through said lamps, and to maintain each of said lamps at the average current value, each of said regulating devices including a transistor having a base coupled to said low frequency control unit, a collector coupled to electric power source, and an emitter grounded, and each of said regulating devices further including a switch coupled to said collector of said transistor, to control said lamps. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification