Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Transformer in the supply circuit
Reexamination Certificate
2005-09-06
2010-10-26
Owens, Douglas W (Department: 2821)
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Transformer in the supply circuit
C315S274000, C315S291000
Reexamination Certificate
active
07821209
ABSTRACT:
A light source unit for use in, for example, a backlight for illuminating a display panel of a liquid crystal display apparatus, includes a cold-cathode tube having discharge electrodes provided one in each end portion of a glass tube whose interior is filled with a discharge gas. A coil as an inductance element is connected to at least one of the discharge electrodes of the cold-cathode tube so as to eliminate the difficulty in handling a cold-cathode tube caused by its having a negative characteristic such that, as the current flowing therethrough increases, the resistance across it decreases, causing the cold cathode-tube to succumb to current runaway.
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Official communication issued in the corresponding International Application No. PCT/JP2005/016283, mailed on Dec. 6, 2005.
Keating & Bennett LLP
Le Tung X
Owens Douglas W
Sharp Kabushiki Kaisha
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