Image analysis – Image sensing – Hand-held
Patent
1996-03-15
2000-05-09
Lee, Thomas D.
Image analysis
Image sensing
Hand-held
382189, 382186, 345173, G06K 922, G06K 918, G06K 900, G09G 500
Patent
active
060614803
ABSTRACT:
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 wherein a first conductive sheet for x-coordinate detection provided with electrodes on a pair of end edges and a second conductive sheet for y-coordinate detection provided with electrodes on a pair of end edges are superposed through a spacer so that respective electrodes intersect orthogonally. In a low power consumption mode of operation; a predetermined voltage is applied between one of the electrodes of the first conductive sheet and one of electrodes of the second conductive sheet for detecting a variation of the voltage. When the voltage varies the device switches, 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, y2) of either of the first conductive sheet or the second conductive sheet, therefore the low power consumption is maintained.
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Inoue Nobuhiro
Iwaki Jitsu
Kisaichi Kazuhiro
Nannichi Toshihiko
Nose Toshiro
Chen Wenpeng
Kabushiki Kaisha Toshiba
Lee Thomas D.
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