Gas discharge lamp dimming control method

Details Gas discharge lamp dimming control method Gas discharge lamp dimming control method

2006-12-26

2006-12-26

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

C315S2090SC, C315SDIG002, C315SDIG002, C315S291000

Reexamination Certificate

active

07154231

ABSTRACT:
A gas discharge lamp dimming control method aims to provide a dimming period after a start period when a gas discharge lamp is ignited. The dimming period has a duty voltage set initially or corresponding to a remained dimming value in a pervious OFF condition of the gas discharge lamp. Hence the gas discharge lamp is provided with electric energy and maintained in a start condition in the dimming period at any dimming value setting. The duty voltage during the dimming period lasts a length equal to that of the dimming period to allow the gas discharge lamp to gradually restore the required dimming illumination in the start condition and achieve a maximum dimming range.

REFERENCES:
patent: 6949888 (2005-09-01), Ribarich
patent: 2005/0062444 (2005-03-01), Chou et al.
patent: 2006/0125413 (2006-06-01), Chou et al.
patent: 504101 (2002-09-01), None

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