Cold cathode fluorescent lamp driving system

Details Cold cathode fluorescent lamp driving system Cold cathode fluorescent lamp driving system

2005-06-28

2008-05-20

Dinh, Trinh Vo (Department: 2821)

Electric lamp and discharge devices: systems

Plural load device systems

C315S291000, C315S307000

Reexamination Certificate

active

07375477

ABSTRACT:
A CCFL (cold-cathode fluorescent lamp) driving system for multiple CCFL loads includes a transformer, a CCFL circuit, and a controlling circuit coupled between the transformer and the CCFL circuit. The CCFL circuit includes multiple CCFL loads. The transformer includes a primary winding and a secondary winding, with the primary winding coupled to a voltage source and the secondary winding coupled to the CCFL loads. The controlling circuit includes a part for generating a predetermined voltage signal to power the CCFL loads during a warm-up stage and another part for generating a modulation signal. With such circuit arrangement, each of the multiple CCFL loads is powered from an off state to an operationally-on state.

REFERENCES:
patent: 6104146 (2000-08-01), Chou et al.
patent: 6498437 (2002-12-01), Chang et al.
patent: 6979959 (2005-12-01), Henry
patent: 7208886 (2007-04-01), Hsieh et al.
patent: 2004/0183465 (2004-09-01), Jang
patent: 2005/0093476 (2005-05-01), Gray
patent: 2005/0253537 (2005-11-01), Jang et al.

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