Patent ID: 6876159
Filing Date: 2005-04-05
Classification: H02J,H05B

Abstract:
1. An electronic ballast system for emergency lighting applications, comprising: an input power source for providing the electronic ballast system with power required; a storage voltage source connected to the input power source in series so as to store the power and having one end thereof connected to ground; a first capacitor connected to a second capacitor in series, wherein one end of the first capacitor is connected to the input power source and one end of the second capacitor is grounded; a plural regular lamp set connected to the first capacitor with the second capacitor for regular lighting; a regular/emergency lamp set connected to the input power source and the storage voltage source for regular or emergency lighting; a first switch having one end coupled with the plural regular lamp set and the other end connected to ground; a second switch with one end connected to ground; a transformer having a primary coil coupled to the regular/emergency lamp set, and a secondary coil coupled to the second switch, wherein one end of the primary coil is connected to the secondary coil; a third switch with one end coupled to the regular/emergency lamp set and the other end coupled to the input power source; a forward diode installed for rectifying with one end coupled to the input power source and the other end thereof coupled to the plural regular lamp set with the first switch; and a backward diode for rectifying function with one end coupled to the first switch and the other end coupled to the third switch.