Lighting circuit for discharge lamp which restricts inversion of

Details Lighting circuit for discharge lamp which restricts inversion of Lighting circuit for discharge lamp which restricts inversion of

1996-05-13

1998-01-06

Pascal, Robert

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315151, 315209R, 315 82, 315DIG5, 315DIG7, G05F 100

Patent

active

057058989

ABSTRACT:
In a lighting circuit, a battery voltage is supplied via a DC booster circuit to a DC-AC converter where the voltage is converted to an AC voltage with a rectangular waveform. This AC voltage is supplied to a discharge lamp. At this time, the DC-AC converter controls the frequency of the rectangular wave output from the DC-AC converter in accordance with a signal sent to a bridge type driver from a frequency controller. A lighting detector is provided to detect if the discharge lamp has been lighted. Upon reception of a signal from the lighting detector, the frequency controller sets the frequency of the output voltage of the DC-AC converter in the pre-lighting period of the discharge lamp higher than the frequency of the output voltage of the DC-AC converter after the lighting of the discharge lamp and restricts the inversion of the polarity of the output voltage of the DC-AC converter until a predetermined time passes sfrom the point of the activation of the discharge lamp.

REFERENCES:
patent: 4240009 (1980-12-01), Paul
patent: 4587460 (1986-05-01), Murayama et al.
patent: 4724360 (1988-02-01), Luuresama
patent: 5068570 (1991-11-01), Oda et al.
patent: 5140229 (1992-08-01), Yagi et al.
patent: 5142203 (1992-08-01), Oda et al.
patent: 5151631 (1992-09-01), Oda et al.
patent: 5198728 (1993-03-01), Bernitz et al.
patent: 5212428 (1993-05-01), Sasaki et al.
patent: 5278452 (1994-01-01), Matsumoto et al.
patent: 5295036 (1994-03-01), Yagi et al.
patent: 5422548 (1995-06-01), Yamashita et al.
patent: 5449973 (1995-09-01), Yamashita et al.
patent: 5485061 (1996-01-01), Ukita et al.
patent: 5486740 (1996-01-01), Yamashita et al.
patent: 5491387 (1996-02-01), Saito
patent: 5500792 (1996-03-01), Jeon et al.
patent: 5514935 (1996-05-01), Oda et al.

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