Importance

Loading Importance Indicators...

Abstract

The invention provides a method and apparatus for inputting coordinate information in which a relative coordinate mode and an absolute coordinate mode is automatically switched depending on a contact area. If a tablet is operated with a finger or a pen, a detection circuit detects the contact area. If the contact area is greater than a predefined threshold value, a signal corresponding to the relative coordinates of the point P at which the finger or the pen is contact with the tablet is output. If the contact area is equal to or smaller than the predefined threshold value, a signal corresponding to the absolute coordinates of the point P is output. The above output signal is supplied to a transmission module. The transmission module performs frequency modulation on the received signal and transmits the resultant signal via a transmission antenna. There are also provided buttons used for clicking operations. If a power switch is turned on, a power supply voltage is supplied from a battery via a power supply circuit.

Loading the Abstract Image...

First Claim