EMERGENCY LAMP LIGHTING DEVICE

PROBLEM TO BE SOLVED: To stop the operation of an emergency lamp lighting device certainly at the time of switching from emergency lighting to normal lighting. SOLUTION: This emergency lamp lighting device is provided with a push-pull type inverter having an oscillating transformer T2 and switching transistors Q3, Q4. An auxiliary transistor Q5 is formed, which connects between a feedback winding N9 which conducts self-excitation control of the switching transistors Q3, Q4, and a ground G with a low potential. The auxiliary transistor Q5 is energized to stop the operation of the switching transistors Q3, Q4 at the time of switching from emergency lighting to normal lighting. It is thus possible to stop the operation of the push-pull type inverter for emergency lighting certainly.