0752681-A2 cites 3 patents.

The present invention concerns a coordinate input device for entering coordinate values by superposing on a display device (LCD or CRT). The device is comprised of a coordinate input section (401) wherein a first conductive sheet (151) for x-coordinate detection provided with electrodes (x1, x2) on a pair of end edges and a second conductive sheet for y-coordinate detection provided with electrodes on a pair (152) of end edges are superposed through a spacer (153) so that respective electrodes intersect orthogonally. A predetermined voltage is applied between one of the electrodes of said first conductive sheet and one of electrodes of said second conductive sheet for detecting the variation of said voltage. When the voltage varies, a predetermined voltage is applied between one electrode (x1) of the first conductive sheet and one electrode (y2) of the second conductive sheet.; When the voltage does not vary, no current flows between the pair of electrodes (x1, x2 or y1 or y2) of either of the first conductive sheet or the second conductive sheet. Therefore the low power consumption is maintained.

Title
Coordinate input device
Application Number
EP19960104137 19960315
Publication Number
0752681 (A2)
Application Date
March 15, 1996
Publication Date
January 8, 1997
Inventor
Nannichi Toshihiko
JP
Inoue Nobuhiro
JP
Nose Toshiro
JP
Iwaki Jitsu
JP
Kisaichi Kazuhiro
JP
Assignee
Tokyo Shibaura Electric Co
JP
IPC
G06K 11/12
G06F 03/041
G06F 03/033
G06F 03/041
G06F 03/033
G06F 03/045
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