| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting circuit of the cold-cathode discharge lamp which can evade noise and interference between circuits. SOLUTION: Because a phase of output waveform corresponding to each cold-cathode discharge lamp is made to differ from each other, constantly flowing current while light is on increases, there becomes a little intermission component of power supply current, and line noises discharged from power supply line can be reduced. Therefore, there is no need to install a noise prevention circuit to respective cold-cathode discharge lamps L1 to Ln, and a simplification of circuit can be aimed at, since a control circuit 3 can be allowed to be one. |
