Question 1

How does RMA detect touch or input?

Accepted Answer

RMA uses the principle of electromagnetic induction.When the distance between the magnets changes due to external input, the magnetic field changes, which induces an electromotive force(voltage) in the coil. By analyzing the waveform of this voltage signal, it is possible to determine whether a touch has occurred.

Question 2

How is RMA input sensing different from a capacitive touch sensor?

Accepted Answer

While capacitive sensors can recognize the contact position of a finger, RMA's input detection relies on detecting physical displacement. Although detection sensitivity can be adjusted via software, a single element has limitations in identifying the specific coordinates of the location pressed by the user. However, by placing the actuator at the point where surface displacement is greatest due to the mechanical structure and applying optimal sensitivity tuning, it is possible to effectively implement local input functions for a specific area, even if full coordinate recognition is not possible.

Question 3

Is it possible to implement haptics and sound simultaneously?

Accepted Answer

The low-frequency range can be used for haptic vibration, while the mid- to high-frequency range can be used for sound output.When a driver with a DSP is used, the two signals can be appropriately mixed and controlled.

Question 4

Is haptic vibration possible on any surface?

Accepted Answer

Haptic vibration is most effectively delivered when the surface touched by the user is structured to allow fine physical vibration.If the panel is too heavy, has very high stiffness, or is firmly fixed at multiple points so that it can barely move, the haptic sensation felt at the fingertips may become very weak or practically imperceptible, even if the actuator generates vibration. Therefore, to achieve optimal haptic performance, it is recommended to apply a suspension structure that allows the panel to move slightly.

Question 5

What are the voltage limits for each signal type?

Accepted Answer

This explanation is based on the AC/PC-160-064 model.Continuous sine wave driveWhen playing general music/audioWhen haptic feedback is activatedAllowed input4W8WBecause haptic pulses are typically very short, momentarily high peak power may be acceptable in haptic use cases. However, mechanical and thermal limits must be taken into consideration.Voltage limit4.8 Vrms6.8 Vrms8~10 Vpeak

FAQ

How does RMA detect touch or input?

How is RMA input sensing different from a capacitive touch sensor?

Is it possible to implement haptics and sound simultaneously?

Is haptic vibration possible on any surface?

What are the voltage limits for each signal type?

Technology

Products

Development Kits

Applications & Demo

Company

Blog

Contact

FAQ