Mutoh Industries Ltd.

Tomoo Nakajima

Yoichi Abe

A light guide plate for a liquid crystal screen display apparatus providing a favorable visual effect. The printing data of a light reflection pattern stored in a computer is transferred to an inkjet printer to allow the inkjet printer to subject a substantially-rectangular printing face surrounded by upper and lower and left and right edges of a light guide plate to a reflective printing for diffusing light emitted from a light source into the interior of the light guide plate. The printing data for performing the reflective printing is prepared so that a printing density is increased from the edges in the four directions corresponding to the edges in the four directions of the light guide plate toward one or more high density setting points set in front of the respective opposed edges. The reflective printing is performed using white ink including titanium oxide.

Light-guide-plate creation method and device

A gradation pattern preparation program by which a complicated gradation pattern can be prepared easily, wherein a computer is caused to function as: a vertical and horizontal printing density control line generation means for displaying, on a campus face, vertical and horizontal printing density control lines in a net-like manner, a vertical cross section line generation means for displaying a cross section image of the selected vertical printing density control line as a vertical cross section line on a vertical cross section line display screen, a horizontal cross section line generation means for displaying a cross section image of the selected horizontal printing density control line as a horizontal cross section line on a horizontal cross section line display screen, a printing density control point generation means for displaying, on the respective vertical and horizontal cross section lines, printing density control points for editing the respective vertical and horizontal cross section lines, and a printing density control point shift means for changing, in accordance with the shift of the printing density control points, heights to reference lines of the respective vertical and horizontal cross section lines.

Growing community of inventors

Tokyo, Japan

Tomoo Nakajima