Fluorescent tube having an increasing internal diameter, a...

Details Fluorescent tube having an increasing internal diameter, a... Fluorescent tube having an increasing internal diameter, a...

2011-01-11

2011-01-11

Vo, Tuyet Thi (Department: 2821)

Electric lamp and discharge devices

With gas or vapor

Having electrodes with geometrical relationship

C313S623000, C313S631000, C313S234000, C313S634000

Reexamination Certificate

active

07868551

ABSTRACT:
A fluorescent tube in which no luminance gradient in the longitudinal direction occurs even when a one-side high-voltage driving method is used, a method of driving the fluorescent tube, an illuminating device for display device, and a display device having the illuminating device are provided. The fluorescent tube for one-side high-voltage driving is arranged behind a display panel via optical sheets. An internal diameter of the fluorescent tube is arranged to become larger gradually toward an electrode part at a high-voltage driving side, which prevents the occurrence of the luminance gradient in the longitudinal direction when a one-side high-voltage driving method is used.

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Official communication issued in the International Application No. PCT/JP2006/302811, mailed on May 23, 2006.

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