| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To eliminate a malfunction and to detect the exchanging operation of a lamp with a simple circuit. <P>SOLUTION: Lamp exchange detection circuit 10 has 1st and 2nd charge storage/discharge means including 1st and 2nd AD inputs 23a and 23b, 1st and 2nd diodes D1 and D2, 1st and 2nd capacitors C1 and C2, and 1st and 2nd resistances R1 and R2. The potential of a nodal point P1 and that of a nodal point P2 are inputted in a comparator circuit 27 and compared, and the exchange of the lamp is detected according to the obtained result. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
