| 摘要 |
PROBLEM TO BE SOLVED: To obtain a multi-lighting type cold-cathode tube lighting device which can cope with a light-control method to be further diversified in the future. SOLUTION: This has a main inverter circuit 1 which consists of a positive feed back amplifying circuit having transistors Q1, Q2 and an oscillation function, and two transformers T1, T2 which are respectively connected with this positive amplifying circuit and one of which has a base coil Nf1, and a second inverter circuit 2 which is constituted in the same way as the main inverter circuit 1. When the one base coil is connected respectively to the positive amplifying circuit of the two inverter circuits, the cold-cathode tube CCFL1 connected to each output end of the two transformers T1, T2 of the main inverter circuit and the cold-cathode tube CCFL2 connected to each output end of the two transformers of the second inverter circuit 2 are synchronized and at the same time the cold-cathode tubes CCFL1, CCFL2 are made possible to be respectively light-controlled using a switch. |
