| 摘要 |
PURPOSE:To prevent irregular flickering of a fluorescent lamp by spanning a filament coil in the direction at a right angle to the discharge path in projecting the part coated with an electrode material from the tips of lead-in wires into the discharge path to constitute the electrode. CONSTITUTION:An electrode 1 to be arranged on both end parts of a fluorescent lamp is formed in supporting a filament coil 4, whose center part 6 is coated with an electrode material 7, with two pieces of lead-in wires. Thereby, the filament coil is spanned so that its center part 6 may be in a straight line in the direction at a right angle to the discharge path and the part coated with the electrode material 7 of the coil 4 is arranged so as to be projected into the discharge path from the tips Z of the lead-in wires 3. Further, the center part 6 of the coil 4 is made to be at the shortest distance from the opposing electrode, and electrons are made to flow into this part with an extremely high probability in an anode cycle. Accordingly, the anode working point can be effectively fixed so as to prevent the occurrence of irregular flickering.
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