Patent ID: 9515519
Filing Date: 2016-12-06
CPC Classification: H02J,H05B

Claim Text:
1. An electric lamp apparatus with an emergency light, comprising: a first module comprises a power supply that supplies commercial power, the first module includes; a first converter that converts alternating current (AC) power supplied from the power supply into direct current (DC) power; in response to detection of a first enable signal, a first switch that is turned on to pass the DC power output from the first converter, the DC power being supplied to an electric lamp via the first switch; an electric lamp that emits light with the DC power supplied passing through the first switch; and a second module configured to apply the first enable signal to the first switch in order to keep the first switch turned on in response to detection of the power supply normally supplies the commercial power, and in response to detection of power shutdown, turns off the first switch and to receive power from a battery to make the electric lamp function as the emergency light when power shutdown occurs in the power supply, wherein the second module is an emergency light module, the second module further comprises: a shutdown sensor detects the power shutdown, in response to detection of the power shutdown, a pulse generator generates a pulse signal different in a frequency band from a frequency band of the commercial power, a rectifier rectifies the pulse signal, a filter passes the rectified pulse signal, a second converter converts the pulse signal passed through the filter into a DC signal, in response to detection of the power shutdown, a level sensor generates a first disable signal for turning off the first switch and generates a second enable signal for turning on a second switch, a booster boosts charged power of the battery up to an electric-lamp driving voltage as the level sensor operates; and the second switch is turned on to supply the boosted power to the electric lamp in response to detection of the second enable signal.