Circuit arrangement for operation of one or more lamps

Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Impedance or current regulator in the supply circuit

Reexamination Certificate

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Details

C315S312000

Reexamination Certificate

active

07030568

ABSTRACT:
The invention relates to a background lighting system for a liquid crystal display, more particularly to an electronic circuit for operation of one or more discharge lamps. A DC/AC full-bridge inverter circuit generates two voltages whose AC components are phase-shifted by 180°. The discharge lamps are supplied with the sum of these two AC voltages.

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“A 1.2 kW Electronic Ballast for Multiple Lamps, with Dimming Capability and High-Power-Factor”, by Gules et al, Applied Power Electronics Conference and Exposition, 1999, pp. 720-726.
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“High-Quality Rectifiers with High-Frequency Insulation—An Overview”, by Spinazzi et al, Industrial Electronics, 1995, pp. 64-71.

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