Title:
【発明の名称】座標入力装置
Document Type and Number:
Japanese Patent JP2608901
Kind Code:
B2
Abstract:
PURPOSE:To attain the arrangement close to a sensing part while a loss to an electric wave and a magnetic field exchanged between the sensing part and a position indicator is minimized by constituting a shielding plate provided at the lower part of the sensing part of a tablet of a silicon copper including the special weight quantity % of silicon. CONSTITUTION:In a coordinates input device to exchange an electric wave and the magnetism between a sensing part 11 and a position indicator 2 of a tablet 1 and detect the input coordinates with a position detecting circuit 3 connected to the sensing part 11 of at least the tablet 1, a shielding plate 14 composed of the silicon copper including the 4.0-7.0wt.% of the silicon is provided at the lower part of the sensing part 11 of the tablet. Thus, the loss for the electric wave and magnetic field exchanged between the sensing part 11 and the position indicator 2 is minimized, the device can be arranged close to the sensing part 11 and the thickness of the tablet 1 can be made smaller than the conventional one.
Inventors:
Murakami East
Fukusaki Yasuhiro
Fukusaki Yasuhiro
Application Number:
JP26356887A
Publication Date:
May 14, 1997
Filing Date:
October 19, 1987
Export Citation:
Assignee:
Wacom Co., Ltd.
Nippon Steel Tube Co., Ltd.
Nippon Steel Tube Co., Ltd.
International Classes:
G06F3/041; G06F3/03; G06F3/046; G06F3/048; G06F3/0488; G06K11/00; (IPC1-7): G06F3/03; G06F3/03
Attorney, Agent or Firm:
Yoshitaka Yoshitaka