Backlight having discharge tube, reflector and heat conduction member contacting discharge tube

Abstract

A display device includes a backlight having a discharge tube and a reflector. A heat conduction member is attached to the reflector in contact with the discharge tube, so that a part of the discharge tube is locally cooled by the heat conduction member. Liquid mercury is collected at a first position in the discharge tube, and the backlight is assembled so that the heat conduction member or other cooling device is located at the first position. Also, the display device includes an optical sheet having a diffusion portion having projections containing scattering material particles.

1 . A backlight comprising a plurality of discharge tubes, a reflector covering said discharge tubes for reflecting light radiated from said discharge tubes, and blowing means for blowing air to a part of said discharge tubes between said discharge tubes except both edges of said discharge tubes, wherein said blowing means blows air in a direction being crossed with a direction in which a discharge occurs inside said discharge tubes and the air blown by said blowing means is mainly directed to a portion at which said plurality of discharge tubes face each other.