Title :
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
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;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2005.854244
