Discharge lamp drive apparatus and liquid crystal display...

Details Discharge lamp drive apparatus and liquid crystal display... Discharge lamp drive apparatus and liquid crystal display...

2007-06-05

2007-06-05

Vu, David (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

C315S219000, C315S239000, C315S312000

Reexamination Certificate

active

11345487

ABSTRACT:
A discharge lamp drive apparatus includes: an inverter circuit; a transformer; a plurality of discharge lamp connection terminals; a plurality of ballast capacitors; a plurality of voltage detection circuits; and a signal processor. Each voltage detection circuit has first and second voltage detection elements constituting a series circuit. Each series circuit has a first end connected with a corresponding one of the discharge lamp connection terminals and a second end connected with a grounding terminal. The signal processor generates a signal indicating an open state of a discharge lamp by using an average value and a peak value of voltages appearing between connection points of the first and second voltage detection elements and the grounding terminals.

REFERENCES:
patent: 5331253 (1994-07-01), Counts
patent: 6362575 (2002-03-01), Chang et al.
patent: 3-21038 (1991-05-01), None
patent: 4-79120 (1992-12-01), None
patent: 6-267674 (1994-09-01), None
patent: 9-322553 (1997-12-01), None
patent: 2000-3796 (2000-01-01), None
patent: 2002-164185 (2002-06-01), None
patent: 2004-241136 (2004-08-01), None
U.S. Appl. No. 11/258,899, filed Oct. 27, 2005, Maeda et al.
U.S. Appl. No. 11/258,908, filed Oct. 27, 2005, Maeda et al.
U.S. Appl. No. 11/345,487, filed Feb. 2, 2006, Shinbo et al.

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