To provide a fluorescent tube light-emitting plate unit, of which external electrode fluorescent tubes (hereinafter, called EEFL) are arranged directly downward; weak points of the EEFL, coming out when generating backlight turned into a uniform light by a diffusion plate, are solved; such as (1) that there is a possibility of electric shock or discharge because of an exposed electrode, and (2)that the EEFL is thin, brittle, and hard to handle, and (3) that unevenness of brightness is generated at the part not emitting light like an electrode part when the backlight is formed for large area, and (4) that the plate unit can not be fitted to a decorative lighting box having an optional length because of a regulated tube length.
(1) The light-emitting unit is formed by arraying a plurality of cylinders made of transparent resin in parallel, preparing a structure formed on a flat plate, and by housing the EEFLs in the cylinder with a necessary distance from each other. By the above, accident is prevented and handling is made easily. (2) When manufacturing a backlight with a large area and an optional length, a light-emitting area of the light-emitting plate unit is changed by moving a metal electrode to the middle part of the respective EEFLs, a part of the plurality of light-emitting plate units are superposed, and the position is shifted so that the light-emitting part of the EEFLs at a lower side is not kicked. (3) As another countermeasure against the shadow generated by the external electrode, a transparent electrode utilizing an ITO conductive film can be used.
AIDOU KK
WEST KOBO KK