Position detection method and device

Details Position detection method and device Position detection method and device

2005-07-19

2005-07-19

Lefkowitz, Sumati (Department: 2675)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C178S018060, C178S019030

Reexamination Certificate

active

06919882

ABSTRACT:
The present invention disclosed a position detection device and method for use in a plane surface to determine the position of a capacitive coupling device. Two arrays of row and column conductive wires form two layers on a substrate, said two layers are isolated by an insulated layer; between each two row wires there is a common row wire; between each two column wires there is a common column wire. Said common row and common column wires are connected to a common row terminal and common column terminal respectively. AC signal is applied to two adjacent wires sequentially to determine point P is between row k and row k+1. Then AC signal is applied to row k only, and then applied to row k+1 only, to determine point P is near row k or row k+1. Finally, apply AC signal to common rows and then to all rows to determine point P is closed to row wire or common wire. Then repeats the above process for the columns. By combining the above processes the position in a two-dimensional space is determined. This method increases the accuracy of detection with less conductive row wires and column wires.

REFERENCES:
patent: 5283558 (1994-02-01), Chan

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