Frequency-modulated dimming control system of discharge lamp

Details Frequency-modulated dimming control system of discharge lamp Frequency-modulated dimming control system of discharge lamp

2005-08-30

2005-08-30

Tran, Thuy V (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S224000, C315S307000, C315SDIG004

Reexamination Certificate

active

06936979

ABSTRACT:
The present invention discloses a frequency-modulated dimming control system of a discharge lamp. The frequency-modulated dimming control system of a discharge lamp includes including a voltage regulator having a variable output voltage for converting an input voltage into a bus voltage, wherein a level of the bus voltage is a predetermined ratio of the input voltage, for example 10% of the input voltage, and a ballast circuit for driving the discharge lamp by detecting a variation of the bus voltage and then providing a current to the discharge lamp in response to a frequency modulation of the ballast circuit and the variation of the bus voltage so as to control a light intensity of the discharge lamp.

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