| 摘要 |
In a direct type backlight device for large-size LCD device, the shape of fluorescent tube holder must be such that following defects can be prevented or reduced, such as uneven luminance caused by the sagging and deforming of a fluorescent tube due to its own weight and longer length, the damages of the fluorescent tube caused by vibration and impact, the heat conduction from the fluorescent tube to the fluorescent tube holder leading to the temperature of the fluorescent tube being lower than surrounding temperature and the unevenness of luminance caused by degradation of luminance level around the contacting portion of the fluorescent tube. To achieve to the aforementioned purposes, the invention discloses a fluorescent tube holder having a polygon clamping shape to hold the fluorescent tube at specific position and to reduce a contacting area with the fluorescent tube for minimizing luminance unevenness caused by heat conduction.
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