Uninterruptible fluorescent lamp circuit available for emergency lighting
First Claim
1. An uninterruptible fluorescent lamp circuit available for emergency lighting comprising in sequencea power supply circuit and a battery connected in parallel to each other,a power-interruption-detection-and-switchover (PIDS) circuit,an oscillatory boosting circuit,a current-limiting circuit, anda fluorescent lamp;
- said oscillatory boosting circuit transforming the input power to it into a high-frequency, high-voltage power which passes through said current-limiting circuit before being outputted to energize said fluorescent lamp.
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Abstract
An uninterruptible fluorescent lamp circuit available for emergency lighting is comprised of an oscillatory boosting circuit which generates a high-frequency, high-voltage power, and a current-limiting circuit which limits current flowing to the fluorescent lamp (the load). Such a fluorescent lamp circuit can provide enough high-voltage power to activate the lamp without the need to use any conventional starter and stabilizer. The currentlimiting circuit uses transistors activated at a fixed voltage and a current-limiting resistance which slows the current. A voltageleading power output is generated which prevents the fluorescent lamp from burning out due to a current-leading power output. Since the power source is a high-frequency, high-voltage current, the flicker of the lamp can be effectively reduced. A battery is connectable to provide an unterruptible power source during an external power failure.
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Citations
9 Claims
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1. An uninterruptible fluorescent lamp circuit available for emergency lighting comprising in sequence
a power supply circuit and a battery connected in parallel to each other, a power-interruption-detection-and-switchover (PIDS) circuit, an oscillatory boosting circuit, a current-limiting circuit, and a fluorescent lamp; said oscillatory boosting circuit transforming the input power to it into a high-frequency, high-voltage power which passes through said current-limiting circuit before being outputted to energize said fluorescent lamp. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
Specification