| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To distinguish a direction of a fluorescent lamp in a manufacturing method of a direct-down type backlight unit wherein adjacent fluorescent lamps are alternately arranged. <P>SOLUTION: In a fluorescent lamp 20 including a glass bulb 26, bead glasses 21, 23 fitted at least at both ends of the glass bulb 26, and a phosphor layer 32 formed on an inner face other than the both ends of the glass bulb 26, a length of a phosphor-layer-non-existant area extending from one end of the glass bulb 26 and a length of a phosphor-layer-non-existant area extending from the other end of the glass bulb 26 are as much different as can be distinguished by a sensor, the bead glasses 21, 23 being colored. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
