Coordinate input device and method for manufacturing same

Details Coordinate input device and method for manufacturing same Coordinate input device and method for manufacturing same

1994-10-18

1996-06-25

Chin, Stephen

Telegraphy

Systems

Position coordinate determination for writing

178 20, G08L 2100

Patent

active

055302092

ABSTRACT:
A coordinate input device including a flexible upper substrate mounted on a rigid lower substrate and having a centrally-located input operating portion. The upper substrate includes a first resistance layer laminated thereon and X-axis electrodes formed on the first resistance layer on opposite sides of the input operating portion. The lower substrate includes a second resistance layer laminated thereon and Y-axis electrodes formed on the second resistance layer on opposite sides of the input operating portion. A spacer group is mounted between the upper and lower substrates to maintain a predetermined clearance, with spacers of the spacer group being having a height of 4 .mu.m or less, and being arranged at a pitch in the range of 0.3 to 1.0 mm. A position detecting circuit is provided for locating a depressed portion of the upper substrate by measuring a change in voltage caused by contact between the first and second resistance layers. A method is also provided for making the coordinate input device.

REFERENCES:
patent: 3911215 (1975-10-01), Hurst et al.
patent: 4620062 (1986-10-01), Mizzi et al.
patent: 4707570 (1987-11-01), Ide et al.
patent: 5010213 (1991-04-01), Moriwaki et al.

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