振動応答機能を有するタッチパネルの感性評価

抄録

Some of smart phones and tablet computers have a function of vibration feedback, when users touch their panels, in order to improve their input operability. In the present study, the click feeling associating with operability of such panels is evaluated by a questionnaire survey. The smart phone employed here is operated by Android OS, and a piezo-elastic vibration module is attached directly to the back of touch panel. In the experiment, arbitrarily designed input signals are imposed to the module by specially developed software, and vibration responses of the panel are evaluated by examinees. Employed input signals are signals with the constant amplitude and the single frequency that is equal to the fundamental frequency of the piezo module, with the window function for its amplitude, and with chirped frequencies to imitate the S-shaped load-stroke curve that are observed when physical buttons are pushed in. Experimental results revealed that the signal with a constant amplitude and single-frequency is most preferred.