| 摘要 |
PROBLEM TO BE SOLVED: To make a circuit function stably by making relative induction small between inductance elements. SOLUTION: In the electrodeless discharge lamp lighting device which comprises a high frequency electric power feeding coil, a high frequency power supply circuit and a matching circuit provided therein, in which the aforesaid coil is disposed to a place close to an electrodeless discharge lamp where discharge gas containing inert gas and metallic vapor, is sealed in a glass tube, the aforesaid circuit is to be connected with both the ends of the aforesaid coil that is formed up while at least more than three of inductance elements L56, L58 and L59 are contained, and the aforesaid matching circuit is connected with a part between the aforesaid circuit and the aforesaid coil so as to allow impedance matching to be performed, the impedance elements L56, L58 and L59 are disposed from one side in the order of the magnitude of magnetic flux density in such a way that the difference in magnetic flux density becomes small between the adjacent inductance elements respectively. |
