Method and device for detecting and measuring pressure and coord

Details Method and device for detecting and measuring pressure and coord Method and device for detecting and measuring pressure and coord

1994-04-19

1995-09-26

Ramirez, Ellis B.

Boots, shoes, and leggings

178 18, 178 20, 345173, 345174, G08C 2100

Patent

active

054539412

ABSTRACT:
A data input resistance pad for measuring coordinates and pressure of a stylus pressed on the pad has X and Y-coordinate resistance boards. The X and Y-coordinate resistance boards are connectable by respective switches to high and low voltage sources at opposite ends of each board. By measuring the voltage at either side of a contact resistance with a high impedance voltage measuring device, a voltage drop across the contact resistance is calculated. This voltage drop represents the contact resistance and therefore the pressure of the stylus. The X position is calculated by measuring the voltage drop from an end of the X-coordinate resistance board to the point of contact. The Y position is calculated by measuring the voltage drop from an end of the Y-coordinate resistance board to the point of contact.

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