| 摘要 |
PURPOSE:To facilitate wiring work and restrain the occurrence of radiation noise and line noise. CONSTITUTION:This system is provided with an invertor unit 34 in which an invertor circuit converting electric power having commercial frequency into that having high-frequency is mounted on a printed board 34a, and plural fluorescent lamps 31-33 feeding converted output of this invertor circuit. Filaments each other on both the ends of respective fluorescent lamps 31-33 are connected individually via transition circuits '36, 35b, 39', '37, 35b, 39', and '38, 35b, 39'. At least one part of 36, 37, and 38 of this plural transition circuits is adjoiningly formed as a wiring pattern onto a printed board 34a, and plural wiring patterns are positioned so that individual current flowed in these plural wiring patterns can be reversed mutually in adjoining currents. |
