Dimming control system and method for a fluorescent lamp

Details Dimming control system and method for a fluorescent lamp Dimming control system and method for a fluorescent lamp

1996-03-15

1998-05-26

Pascal, Robert

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315307, 315DIG4, 315194, 315293, G05F 100

Patent

active

057571457

ABSTRACT:
The illumination intensity of a fluorescent lamp is controlled in response to control signals generated at a remote location on the power supply conductors of a lamp circuit and decoding those control signals at the fluorescent lamp to control the illumination intensity. A dimming controller is connected in the lamp circuit remote from the lamp and generates first and second control signals indicative of a request to increase or decrease, respectively, the lamp illumination intensity. The control module is connected in the lamp circuit to fluorescent lamp and the control module receives the control signals. The control module continually increases and decreases the illumination intensity of the lamp in response to the first and second control signals, respectively. The illumination intensity is controlled by adjusting a time point within each half-cycle of applied power where the lamp is extinguished. A third control signal generated by the dimming controller and decoded by the control module ceases the adjustment in the extinguishing point.

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Startlight TN22 Preliminary Data Sheet, SGS-Thompson Microelectronics, Nov., 1991, pp. 1/5-5/5.

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