Fujifilm Corporation

Hideo Nagano

Ryuichi Katsumoto

Makoto Koike

Yoshihiko Sano

Aya Kuwata

An optical sheet having both a light condensing function and a light diffusing function in a single sheet is to be provided. When a transparent support () on which a curable resin coat layer () is formed is wound around a zigzag-faced roller () on which the reversed pattern of convex-concave patterns is formed to transfer the reversed pattern of the zigzag-faced roller () to the resin coat layer (), gas is blown from a gas jet nozzle (), immediately before winding the transparent support () around the zigzag-faced roller (), into a gap between the resin coat layer () and the surface of the zigzag-faced roller.

Optical sheet manufacturing method

The present invention provides an optical functional sheet and a display device that are capable of keeping a given degree or more of front luminance and are capable of substantially reducing brightness nonuniformity. To this end, the optical functional sheet has a base, and prismsarranged in a lattice pattern on at least one surfaceof the base, wherein each of the prismshas two bottoms Lparallel to a first direction D, two first inclined surfaces Sthat are inclined so as to face each other, two bottoms Lparallel to a second direction Dthat is substantially perpendicular to the first direction D, and two second inclined surfaces Sthat are inclined so as to face each other, and the area Sof one of the second inclined surfaces Sto the sum Sof the areas of the two first inclined surfaces S, or the area Sof one of the first inclined surfaces Sto the sum Sof the areas of the two second inclined surfaces Sis more than 0.5 times to 2.5 times or less.

Growing community of inventors

Fujinomiya, Japan

Hideo Nagano