Discharge lamp lighting apparatus

Details Discharge lamp lighting apparatus Discharge lamp lighting apparatus

2011-07-19

2011-07-19

Choi, Jacob Y (Department: 2821)

Electric lamp and discharge devices: systems

Time-controlled

C363S022000, C363S049000, C315S279000, C315S300000, C315S302000

Reexamination Certificate

active

07982415

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.

REFERENCES:
patent: 2004/0240234 (2004-12-01), Toda et al.
patent: 2004-166446 (2004-06-01), None
patent: 2007-179920 (2007-07-01), None
U.S. Appl. No. 12/357,685, filed Jan. 22, 2009, Kimura.

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