Discharge lamp lighting apparatus
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United States of America Patent
Stats
-
Jul 19, 2011
Grant Date -
May 21, 2009
app pub date -
Nov 18, 2008
filing date -
Nov 19, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A discharge lamp lighting apparatus includes a switch circuit for DC/AC converting, a discharge lamp connected to a secondary winding of a transformer, a current detector detecting an AC output current of the discharge lamp, an error amplifier outputting an error signal to a detected current, a control circuit generating control signals that turn on/off the switching elements in such a way as to control the AC output current at a predetermined value, and a time division signal generator generating a time division signal at the start of an ON/OFF operation of the switching elements, wherein the time division signal delays a change in a burst dimming signal or has a predetermined inclination on the burst dimming signal. The error amplifier changes the error signal according to the time division signal from the time division signal generator.
First Claim
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International Classification(s)
Cited Art Landscape
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