Coordinate input apparatus with correction resistance for rectan

Details Coordinate input apparatus with correction resistance for rectan Coordinate input apparatus with correction resistance for rectan

1994-05-20

1995-07-11

Chin, Stephen

Telegraphy

Systems

Position coordinate determination for writing

178 19, 178 20, 345173, 345179, 345182, G08C 2100, G09G 302

Patent

active

054323045

ABSTRACT:
A coordinate input apparatus for detecting and inputting the coordinates of pressure applied by a pen, includes an input surface and a detection apparatus. The input surface is constructed from first and second input detection members. The first input detection member has a rectangular resistance surface which has electrodes installed at its long ends. The second input detection member has a rectangular resistance surface which has electrodes installed at its short ends. The resistance surfaces for these first and second input members are overlaid so as to not ordinarily come into contact with each other. When pressure is applied to the input surface, the resistance surfaces for the first and second input detection members come into contact with each other. The detection apparatus detects the resistor at the pressurized portion at this time and obtains input coordinates for the X-Y coordinate axes at the input surface. A correction resistor which is connected to at least one of the electrodes disposed at each of the sides of the first input detection member is formed in the same plane and from the same member as the first resistor for the first input detection member.

REFERENCES:
patent: 4752655 (1988-06-01), Tajiri
patent: 4794634 (1988-12-01), Torihata
patent: 4929934 (1990-05-01), Ueda
patent: 4983787 (1991-01-01), Kunikane
patent: 5266750 (1993-11-01), Yatsuzuka
patent: 5324895 (1994-06-01), Inamori

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