Method and device for driving a gas discharge lamp

Details Method and device for driving a gas discharge lamp Method and device for driving a gas discharge lamp

2008-04-15

2008-04-15

Tran, Thuy V. (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S224000, C315SDIG002

Reexamination Certificate

active

07358686

ABSTRACT:
A method for dimming a gas discharge lamp, such as an HID lamp including an MH lamp, includes operating the lamp at nominal power with commutating DC current having a current magnitude IL=αInom, α being equal to 1 or less than 1. The current magnitude ILis reduced, but the lamp still is operated at commutating DC current, until α reaches a predetermined value β. Then, the lamp is operated at DC current, and the current magnitude is reduced further, thus achieving a lower dimming level.

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