| 摘要 |
<p>The present invention relates particularly to pen- based computers, wherein a pen, or stylus (6), is to be positioned on a display of the computer, which display includes a digitizer tablet (3), and which produces a signal 55 that allows the computer to detect the position of the stylus. The stylus (6) is also arranged to produce a second signal, which is used as a telemetry carrier to transmit data from the stylus (6) to the computer. The stylus (6) is provided with position signal (55) generating means such as a first oscillator, and a data signal generating means such as a second oscillator, so that a data signal can be delivered from the stylus (6) at the same time as the position signal. A digitizer tablet (3) is also provided with means FILTER 1 and FILTER 2 for discriminating between the two aforementioned signals. <IMAGE></p> |
