Application of capacitive coupling to the design of an absolute-coordinate pointing device

Author

Tan, Eng Chong ; Wahab, Abdul ; Low, Kay Min

Author_Institution

Sch. of Comput. Eng., Nanyang Technol. Univ., Singapore, Singapore

Volume

54

Issue

5

fYear

2005

Firstpage

2099

Lastpage

2104

Abstract

Capacitive coupling is applied to develop an absolute-coordinate-based interface system for a personal computer (PC). The system consists of a pointing device and a digitizing tablet. The pointing device is a cordless stylus that does not need any power supply. The digitizing tablet is wire-connected to the PC via a serial or universal-serial-bus (USB) port. The technique of capacitive coupling is used to detect both the x and y positions of the tablet and also if any of the stylus buttons is pressed. Measured voltage values and analyses of capacitive coupling signals are given. Experimental results show that the interface system is reliable, and its performance is robust.

Keywords

capacitance; computer peripheral equipment; interactive devices; user interfaces; absolute-coordinate pointing device; absolute-coordinate-based interface system; capacitive coupling; cordless stylus; digitizing tablet; personal computer; Application software; Costs; Graphical user interfaces; Mice; Microcomputers; Power supplies; Signal analysis; Universal Serial Bus; Voltage measurement; Wire; Absolute-coordinate; capacitive coupling; cordless stylus; digitizing tablet; pointing device;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2005.854244

Filename

1514669