Electrical discharge tube, illumination apparatus for...

Details Electrical discharge tube, illumination apparatus for... Electrical discharge tube, illumination apparatus for...

2011-02-08

2011-02-08

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

With load device temperature modifier

Electric heater for the load device

C315S309000, C315S312000, C349S070000

Reexamination Certificate

active

07884552

ABSTRACT:
A backlight device includes a hot cathode fluorescent tube having a pair of electrodes, a power source arranged to apply voltage having an alternating component to at least one of the pair of electrodes, and an electrode heating circuit arranged to supply heating current to the electrodes. The backlight device further includes temperature sensors that detect the temperatures in the electrodes to be supplied with the heating current. Based on the results detected by the temperature sensors, a switch element is driven by the control section. The heating current is thus controlled. With this, the temperatures in the electrodes of the electrical discharge tube can be more accurately grasped, and the temperatures in the electrodes of the discharge tube can be more properly controlled.

REFERENCES:
patent: 4487481 (1984-12-01), Suzawa
patent: 5274305 (1993-12-01), Bouchard
patent: 7012376 (2006-03-01), Yamashita et al.
patent: 7161312 (2007-01-01), Blum
patent: 2004/0150601 (2004-08-01), Baek et al.
patent: 58-165851 (1983-11-01), None
patent: 62-036966 (1987-02-01), None
patent: 05-242989 (1993-09-01), None
patent: 06-068858 (1994-03-01), None
Official communication issued in counterpart International Application No. PCT/JP2006/313210, mailed on Sep. 26, 2006.
English Language Translation of JP 62-036966 A.

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