Sharp Kabushiki Kaisha Corporation

Masaki Kageyama

Ryuzo Yuki

Takeshi Ishida

Shugo Yagi

Ichiro Umekawa

Hirofumi Oosawa

Yoshinobu Hirayama

Tetsuyuki Takemoto

Masanori Ehara

A method of manufacturing a light guide plate includes steps of cutting a light guide plate base material with a frame-shaped die into a die-cut plateincluding side surfaces each having a rectangular shape and performing thermal-imprinting process. In thermal-imprinting process, a processing surfaceof a plate surface of a heated processing boardis pressed against one of the side surfacesof the die-cut plateto thermally imprint a pattern of the processing surfaceof the processing boardon the one of the side surfacesof the die-cut plate. The processing surfacehaving a shape that is recessed more at a portion thereof opposite a middle of a long dimension of the one of the side surfacesthan a portion thereof opposite ends of the long dimension of the one of the side surfacesis pressed against the side surface

Method of manufacturing light guide plate, lighting device, and display device

An illumination device () is provided with the following: light sources (); a light-guide member (()) that includes a light entry region (Is) and a light exit region (Os) which emits planar light; light entry portions () that are formed in the light entry region (Is) and that oppose the light sources (); and bright line suppression portions () that are formed in the areas between the light entry portions () at the front side of the light entry region (Is), and that include bright line suppression prisms () which have a shape that changes the angle of the light emitted in a direction spreading out from the light sources () to a direction closer to the optical axes.

Illumination device and display device

Provided are an illumination device capable of improving the uniformity in brightness of the illumination light, and a display device using the same. An illumination device is provided with: a plurality of light sources arranged in a row in one direction; and a light guide plate which has, along a side edge face, a light receiving face facing the light source, guides light entering through the light receiving face, and outputs illumination light from a light emitting surface disposed on the front surface; the light guide plate having a plurality of prisms and a plurality of prisms provided in an indented manner on the front or rear surface and arranged in a row along the longitudinal direction of the light receiving face; the prisms being formed spanning between the light receiving face and the opposing face opposite the light receiving face; and the prisms being formed, between adjacent prisms, deeper than the prisms within a predetermined range in the vicinity of the light receiving face.

Growing community of inventors

Yonago, Japan

Masaki Kageyama