FIELD: physics.
SUBSTANCE: inverter circuit (20a) includes: a drive circuit (21) for outputting a pulse signal (S2); a transformer (22) for outputting a drive signal (S1) corresponding to the pulse signal to a fluorescent lamp (13), the transformer including a secondary winding (22b) having one end connected to the fluorescent lamp; a detection control circuit (24) for detecting a detection signal (S4) corresponding to the drive signal supplied to the fluorescent lamp; a wiring line (32) connecting another end of the secondary winding of the transformer and the detection control circuit; and a wiring line (34) provided together with the wiring line (32) so that magnetic fields generated cancel out each other.
EFFECT: suppressing increase in level of electromagnetic noise.
18 cl, 11 dwg
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