Lighting control device having a corrector integrally with a controller thereof for correcting a dimming prescribed range stored therein
First Claim
1. A lighting control device, comprising:
- a pair of input terminals electrically connected to an illumination load and an AC power supply;
a bidirectional switch configured to switch between conduction and non-conduction of a bidirectional current between the pair of input terminals;
an inputter configured to receive a dimming level specifying a magnitude of a light output of the illumination load;
a controller configured to control the bidirectional switch so as to retain the bidirectional switch in an ON state for an on time having a length determined in accordance with the dimming level within a prescribed range in each of half periods of an AC voltage of the AC power supply; and
a corrector configuredto determine, with reference to a determination condition, whether or not a target waveform which is a waveform of at least one of a voltage and a current input to the pair of input terminals has an anomaly andto correct the prescribed range so as to narrow the prescribed range when the target waveform has the anomaly.
1 Assignment
0 Petitions
Accused Products
Abstract
A lighting control device includes a bidirectional switch, an inputter, a controller, and a corrector. The bidirectional switch is configured to switch between conduction and non-conduction of a bidirectional current between a pair of input terminals. The inputter is configured to receive a dimming level specifying the magnitude of a light output of a load. The controller is configured to control the bidirectional switch so as to retain the bidirectional switch in an ON state for an on time having a length determined in accordance with the dimming level within a prescribed range in each of half periods of an AC voltage of an AC power supply. The corrector is configured to (i) determine whether or not a target waveform has an anomaly with reference to a prescribed determination condition, and (ii) correct the prescribed range so as to narrow the prescribed range when the target waveform has the anomaly; wherein the target waveform is a waveform of at least one of a voltage and a current input to the pair of input terminals.
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Citations
12 Claims
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1. A lighting control device, comprising:
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a pair of input terminals electrically connected to an illumination load and an AC power supply; a bidirectional switch configured to switch between conduction and non-conduction of a bidirectional current between the pair of input terminals; an inputter configured to receive a dimming level specifying a magnitude of a light output of the illumination load; a controller configured to control the bidirectional switch so as to retain the bidirectional switch in an ON state for an on time having a length determined in accordance with the dimming level within a prescribed range in each of half periods of an AC voltage of the AC power supply; and a corrector configured to determine, with reference to a determination condition, whether or not a target waveform which is a waveform of at least one of a voltage and a current input to the pair of input terminals has an anomaly and to correct the prescribed range so as to narrow the prescribed range when the target waveform has the anomaly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification