| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a filament detection circuit that does not make a lump blink even when the lump lost its one side emitter. <P>SOLUTION: A diode 80 has a positive pole having a junction at the connection intersection point of a diode 15 and a resistor 14, and a negative pole having a junction at the connection intersection point of a resistor 65 and a PNP transistor 66. Thereby, an auxiliary power supply voltage is applied to the PNP transistor 66 through the diode 80, so that blinking does not occur even when the fluorescent lamp 34 loses its one side emitter. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
