| 摘要 |
<p>PURPOSE: An emergency lamp control circuit and a control method thereof are provided to automatically switch the emergency power source and the common electricity by sensing the abnormality of the common electricity. CONSTITUTION: A common supply of electricity part(10) supplies the common electricity. An emergency power supply(20) comprises a nonresident power supply unit(21) supplying the emergency power source in the unusual condition of the common supply of electricity part. The emergency power supply comprises an emergency reserve power source feeder(22) supplying the nonresident power source in the unusual condition of the common supply of electricity part.</p> |
