Power supply system of a light source and a light source...

Details Power supply system of a light source and a light source... Power supply system of a light source and a light source...

2007-07-27

2009-08-25

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S246000, C315S177000

Reexamination Certificate

active

07579788

ABSTRACT:
A power supply system of a light source includes a luminance control unit, luminance adjusting unit, control circuit and voltage transformer. The luminance control unit is for receiving a turn-on signal and outputting a first luminance signal during a predetermined time period. The luminance adjusting unit is for outputting a second luminance signal according to an input of a user. The control circuit is for outputting a power control signal according to the first luminance signal and the second luminance signal. The voltage transformer is for outputting an AC voltage for driving a light source according to the power control signal. During the predetermined time period, the control circuit outputs the power control signal according to the first luminance signal and after the predetermined time period, the control circuit outputs the power control signal according to the second luminance signal.

REFERENCES:
patent: 2006/0071609 (2006-04-01), Chou et al.

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