Discharge lamp lighting circuit for increasing electric power fe

Details Discharge lamp lighting circuit for increasing electric power fe Discharge lamp lighting circuit for increasing electric power fe

1993-06-25

1996-02-13

Pascal, Robert J.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315308, 315247, 315DIG5, 315287, 315 82, 315DIG7, H05B 4136

Patent

active

054913870

ABSTRACT:
A discharge lamp lighting apparatus includes a voltage raising element for raising a DC input voltage, a pulse generator for varying the output voltage output by the voltage raising element is a pulse voltage having a given pulse width and outputting the pulse voltage, a bridge circuit for applying the pulse voltage to a discharge lamp, a voltage detecting element for detecting a voltage applied to the discharge lamp, a current detecting element for detecting a current running through the discharge lamp, an adder for adding a first amplification signal output by a first amplifier and a second amplification signal output by a second amplifier together, elements for delaying outputs from the amplifiers, and a pulse width modulator for controlling the pulse width of the pulse voltage.

REFERENCES:
patent: 3999100 (1976-12-01), Dendy et al.
patent: 4240009 (1980-12-01), Paul
patent: 4422016 (1983-12-01), Kurple
patent: 4791338 (1988-12-01), Dean et al.
patent: 5103143 (1992-04-01), Daub
patent: 5151631 (1992-09-01), Oda et al.
patent: 5204587 (1993-04-01), Mortimer et al.
patent: 5212428 (1993-05-01), Sasaki et al.

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