Short-vibration feedback device uses electromagnetic drive system

27 July 2005 Electronics Technology Products & Solutions

Many electronic components such as mobile phones and car navigation systems are equipped with an increasing number of touch panels, input sensor devices and other equipment that is touch-operated. These kinds of devices require visual confirmation of input. Recently however, demand is rising for vibration, clicking and other sensory functions at the fingertips to indicate to users that their input has been properly accomplished.

Alps has developed its Force Reactor AF Series of short-vibration feedback devices, which generate an array of vibration settings. It says this is the first device in the industry that generates various short vibrations through an electromagnetic drive system. Until now, eccentric vibration motors, piezoelectric devices and other devices have been used. To make an array of vibration settings responsive to diverse input and tactile sensations possible, rapid vibration responsiveness is required. The Alps system utilises proprietary magnetic circuitry to drive an oscillator supported by a spring. By using magnetism and spring tension for vibration control, balance is created and short-vibration is accomplished, thereby enabling a variety of vibrations.

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