Patent ID: 6225577
Filing Date: 2001-05-01
Classification: G06F

Abstract:
A coordinate input device comprising a transparent substrate member comprising:a pair of opposing transparent substrates;ITO films, each formed on a surface of each of said pair of transparent substrates;two pairs of linear electrodes, each pair formed at a given distance from each other on each of said ITO films, one pair of linear electrodes being orthogonal to the other pair of linear electrodes;operation regions, each formed between each pair of said two pairs of linear electrodes; andtwo pairs of first and second lead electrodes, each pair extending from each pair of said two pairs of linear electrodes on said ITO films;wherein, in one pair of first and second lead electrodes on one substrate, the first lead electrode extends in the direction of the corresponding linear electrode toward one edge of the corresponding substrate, the second lead electrode extends along the edge of the corresponding substrate toward the vicinity of the first lead electrode, turns to the edge of the corresponding substrate, and extends along the first lead electrode and an insulating groove is formed in said ITO film between the second lead electrode and the corresponding operation region and between the second lead electrode and the first lead electrode;wherein, in the other pair of first and second lead electrodes on the other substrate, the first lead electrode extends in the direction perpendicular to the corresponding linear electrode toward the proximate edge of the corresponding substrate, the second lead electrode extends along another edge, perpendicular to said proximate edge, of the corresponding substrate and then along the first lead electrode between the first lead electrode and said proximate edge of the corresponding substrate toward the vicinity of the first lead electrode, turns to said proximate edge of the corresponding substrate, and extends along the first lead electrode, and an insulating groove is formed in said ITO film between the second lead electrode and the corresponding operation region and between the second lead electrode and the first lead electrode.