Pentel Kabushiki Kaisha

Yoshiharu Yamashiro

Kiyomi Abe

Genichi Tagata

Tadaaki Sugino

Yoshio Shishido

A capacitively coupled tablet for use with an electrically conductive pen comprises segments each including at least one lattice point of a matrix which comprises groups of spaced conductors which are disposed along coordinate axes. The segments are mutually electrically isolated by an electrically conductive shield layer having apertures which correspond to the surface area of the respective segments, and are marked with corresponding characters to serve as keys. An electrically insulating layer is disposed between the shield layer and the groups of conductors, and a similar surface layer is disposed on the shield layer.

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Koshigaya, Japan

Yoshiharu Yamashiro