Patent ID: 8514364

Claim:
A liquid crystal display device comprising: a display unit housing case configured to house a light source unit and a display unit; and an electronic component housing case configured to house an electronic component, wherein said liquid crystal display device is tightly closed, said liquid crystal display device being externally disposed with heat radiation fins, wherein said display unit housing case consists of a metal box in which a fluorescent lamp as said light source unit and a liquid crystal panel as said display unit are mounted, and a metal frame placed and laid over sides of said box, said display unit housing case being housed inside said metal electronic component housing case, said heat radiation fins are disposed on right and left sides of said liquid crystal display device, and said liquid crystal display device has a thermal conduction path from said fluorescent lamp to said heat radiation fins, the thermal conduction path being formed by using a fluorescent lamp socket fixed on an inner side surface of said box for mounting said fluorescent lamp therein, a side wall of said box, a side wall of said frame, and a side wall of said electronic component housing case.