Abstract: A capacitive touch panel that detects an input position accurately with a limited number of sensing electrodes is provided. First and second sensing electrodes adjacent to each other in a detecting direction are arranged such that among a plurality of branch patterns of the first sensing electrode a branch pattern closer to the second sensing electrode, and among a plurality of branch patterns of the second sensing electrode a branch pattern closer to the first sensing electrode are alternately arranged in the detecting direction. The widths in the detecting direction of the plurality of branch patterns of each sensing electrode are set such that the branch patterns on the opposite sides in the detecting direction have the smallest width, and the width of a branch pattern gradually becomes greater as the branch pattern gets closer to a branch pattern at the center.

Abstract: There is provided a touch panel which has a simple configuration and which can be accurately and reliably operated. It includes a panel 12 constituting a display screen and an elongated piezoelectric element 16 disposed and secured along each of at least two edges of the panel 12 crossing each other. It includes a pressed position calculating circuit 20 for calculating a position in the panel 12 which has been pressed based on output from the piezoelectric elements 16. It includes a boosting circuit 30 serving as piezoelectric element driving means for applying a voltage to the piezoelectric elements 16 to vibrate them when the pressed position in the panel 12 is calculated by the piezoelectric elements 16 and the pressed position detecting circuit 20.

Abstract: Disclosed is an improved digital data modulating method appropriate for stable and high-speed communication. It comprises the step of allotting each of N sequential digital data bit combinations to a corresponding period-and-phase discriminating signal, thereby providing a modulated signal in the form of a series of different single-periods, which modulated signal is insensitive to noise signals appearing in communication mediums.