Pressure-sensitive input apparatus

Details Pressure-sensitive input apparatus Pressure-sensitive input apparatus

1988-09-22

1990-05-29

Oberley, Alvin

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

178 18, 178 19, G08C 2100

Patent

active

049299344

ABSTRACT:
In a pressure-sensitive input apparatus comprising an X-coordinate detection resistive member connected to mutually parallel vertical electrodes and a Y-coordinate detection resistive member connected to mutually parallel horizontal electrodes, for detecting the position of a point depressed by a stylus or the like, by detecting changes in the resistance values of these resistive members, switches are provided for on-off control of the current flowing into or out of both ends of the X-coordinate detection resistive member and the Y-coordinate detection resistive member, and a voltage detection circuit detects the voltage between the X-coordinate detection resistive member and the Y-coordinate detection resistive member. Multiple inputs can be detected according to the results obtained from the voltage detection circuit when the currents are switched by the switches.

REFERENCES:
patent: 4819194 (1989-04-01), Koizumi et al.
"Pressure Sensitive Graphic Input Device" Institute of Electronics and Communications Engineers of Japan, IE81-7, May 1981, pp. 1-6.

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