ILLUMINATION DEVICE, BACK LIGHT AND LIQUID CRYSTAL DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To prevent the peeling of a light control plate and light transmission body even by a severe environmental test and to stabilize the adhesion state for a long period. SOLUTION: This illumination device includes a light transmission plate 2 which has flanks, a rear surface and a light exit surface, a light source which is disposed on the flank side of the light transmission plate 2, a condenser sheet 5 which is successively provided with plural lens-like projecting parts and prism-like projecting parts 5b on the front surface and rear surface, respectively and a transparent adhesive 4 which is applied on the light exit surface 2a of the light transmission plate 2 and adheres the condenser sheet 5 onto the light exit surface 2a of the light transmission plate 2 by press fitting the prism-like projecting part 5b side of the condenser sheet 5 up to the range tb of 5 to 50% in the application thickness ta thereof.