| 摘要 |
Two U-shaped CCFLs (Cold Cathode Fluorescent Lamps) are respectively placed symmetrically up and down with respect to a transverse plane, as a plane of symmetry, passing through a center in the vertical direction of a display screen of a liquid crystal panel. These two U-shaped CCFLs are mounted in a backlight unit in a manner that the mounting pitch of the two U-shaped CCFLs is shorter than the center-to-center distance between parallel tube segments in each U-shaped CCFL. Thereby, the backlight unit for e.g. a 15 inch or larger liquid crystal television can secure practical brightness at a central portion in the vertical direction of the display screen by using two U-shaped CCFLs. This makes it possible for the backlight to reduce the number of CCFLs and the number of accompanying components (e.g. inverter circuits), thereby reducing the cost of the entire backlight unit and improving the work efficiency in assembling the backlight unit. |
