Ballast circuit for fluorescent lamp
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United States of America Patent
Stats
-
Nov 2, 1999
Grant Date -
N/A
app pub date -
Dec 18, 1996
filing date -
Dec 26, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A ballast circuit for a fluorescent lamp for starting the fluorescent lamp and a compact fluorescent lamp is provided. The ballast circuit adopts a bypass capacitor which bypasses a high frequency and high harmonics to a smoothing portion for compensating a recovery characteristic of a rectification diode which causes a problem by feeding back high frequency currents (most of them are I.sub.L) which flow during the ignition of a lamp to a power source input, and including a high frequency component much included in a rectifying and smoothing operation. Thus, a power factor increases 95% or more.
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