Lighting device for a dielectric barrier discharge lamp
First Claim
1. Alighting device for a dielectric barrier discharge lamp comprising:
- a pulse number judging circuit to which a dimming control signal is supplied as an input signal designating a dimming ratio of the dielectric barrier discharge type discharge lamp using rare gas, for judging a number of drive signal pulses per unit time corresponding to the dimming ratio from the dimming control signal, and for outputting the result as the pulse number setting signal, a drive signal generating circuit to which the pulse number setting signal outputted from the pulse number judging circuit is supplied, for outputting the drive signal pulses having a number of pulses per unit time designated by the pulse number setting signal and an inverter circuit which generates HF pulse voltage for driving the dielectric barrier discharge type fluorescent lamp.
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Accused Products
Abstract
A lighting device for dielectric barrier discharge lamp according to the embodiment of the present invention includes a pulse number judging circuit 16. The judging circuit 16 is supplied with a dimming control signal LCS designating a dimming ratio of a discharge lamp as an input signals and judges a number of the drive signal pulses per unit time corresponding to the dimming ratio from the dimming control signal LCS. The judging circuit 16 then outputs the result as the pulse number setting signal. The lighting device includes a drive signal generating signal 18, which is supplied with the pulse number setting signal and outputs the drive signal pulse of the prescribed number of pulse per unit time designated by the number of the pulse setting signal. The lighting device further includes an inverter circuit 10, which is supplied with the output of the drive signal generating circuit 18 and generates HF pulse for driving the dielectric barrier discharge type fluorescent lamp.
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Citations
17 Claims
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1. Alighting device for a dielectric barrier discharge lamp comprising:
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a pulse number judging circuit to which a dimming control signal is supplied as an input signal designating a dimming ratio of the dielectric barrier discharge type discharge lamp using rare gas, for judging a number of drive signal pulses per unit time corresponding to the dimming ratio from the dimming control signal, and for outputting the result as the pulse number setting signal, a drive signal generating circuit to which the pulse number setting signal outputted from the pulse number judging circuit is supplied, for outputting the drive signal pulses having a number of pulses per unit time designated by the pulse number setting signal and an inverter circuit which generates HF pulse voltage for driving the dielectric barrier discharge type fluorescent lamp. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A lighting device for a dielectric barrier discharge lamp comprising:
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a dielectric barrier discharge lamp having discharge plasma space filled with rare gases, which generates excimer molecules by dielectric barrier discharge and having a structure in which a dielectric material lies between the rare gases and at least one of the two electrodes for inducing the discharge in the rare gases, and an HF source device for periodically supplying the electrodes of the dielectric barrier discharge lamp with a prescribed number of high voltage pulses, wherein the HF source device further comprises;
a pulse number judging circuit, which is supplied with a dimming control signal for deciding the dimming ratio of the dielectric barrier discharge type discharge lamp as an input signal for judging a number of drive signal pulses per unit time corresponding to the dimming ratio determined by the dimming control signal and for outputting the result as a pulse number setting signal, a drive signal generating circuit, which is supplied with the pulse number setting signal outputted from the pulse number judging circuit and outputs a drive signal pulse having a prescribed number of pulses per unit time designated by the pulse number setting signal, and an inverter circuit, which is supplied with the output of the drive signal generating circuit and generates HF pulse voltage for driving the dielectric barrier discharge type discharge lamp. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification