| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve problems of a discharge method and an LED method, enable the thinning of a backlight, reduce the unevenness of brightness, and simplify manufacturing work by using a cylindrical vacuum fluorescent tube of a thermoelectron collision method as the backlight of a liquid crystal display device. <P>SOLUTION: A positive pole 18 is formed on the inner face of a transparent cylindrical tube 12, and a fluorescent material layer 20 is formed on it. A negative pole filament 32 is arranged at the center of the cylindrical tube 12, and a support electrode 44 is arranged at a position away therefrom. Both ends of the cylindrical tube 12 are sealed by a stem 38 and a glass bead 36. Two negative pole leads 40, 42 are installed at the stem 38, one end of the negative pole filament 32 is connected to a first negative lead 40, and one end of the support electrode 44 is connected to a second negative lead 42. A tensioner 50 is fixed to the other end of the support electrode 44, and the other end of the negative pole filament 32 is connected to the tensioner. A positive pole contactor 24 is fixed to the positive pole lead 22, and pressurized and contacted to the positive pole 18. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
