MICROLENS ARRAY SHEET USED FOR BACKLIGHT DEVICE AND ROLL PLATE FOR MANUFACTURING MICROLENS ARRAY SHEET

摘要

PROBLEM TO BE SOLVED: To provide a microlens array sheet for a back light device which can suppress occurrence of brightness variations.;SOLUTION: The microlens array sheet 14 comprises a sheet-like base material 15 and a plurality of micro lenses 13 disposed on the base material 15. Each micro lens 13 comprises a projecting surface part 16 and a circumferential edge part 17 on the surface thereof. The projecting surface part 16 is spherical or ellipsoidal. Further the circumferential edge part 17 is formed between the projecting surface part 16 and the base material 15 and is curved in a recessed shape. As compared with a conventional microlens array sheet, the flat part 140 of the micro lens array sheet can be narrowed by curving the surface of the circumferential edge part 17 in the recessed shape. Consequently, the nonuniform brightness of the microlens array sheet resulting from the flat part can be suppressed.;COPYRIGHT: (C)2008,JPO&INPIT