[agl-discussions] haptic touch panel.

Takashi Matsuzawa tmatsuzawa at xevo.com
Thu Feb 8 03:37:09 UTC 2018


By the way, AGL UI currently can give sound feedback (beep) when buttons, etc. are pressed?

That may be the places where we may also want to give vibration, or maybe flash (for hearing-impaired drivers) feedbacks.

________________________________________
From: Takashi Matsuzawa
Sent: Wednesday, February 7, 2018 4:21 PM
To: automotive-discussions at lists.linuxfoundation.org
Subject: Re: haptic touch panel.

I can see an example deisgn of haptic feedback touch panel:

http://www.ti.com/lit/ug/tidu968/tidu968.pdf

It uses DRV2667 chip to drive piezo actuators which are attached to a WVGA touch panel.
On the document how-to DIY information is available, but it is not available as kit to purchse.

This is giving feedback by actuator vibration, actuators are controlled by I2C signals from the host.

I can see hobbiest I2C breakout board for DRV2667 is available (they sell this wit piezo actuators as set), so it may not be too difficult to make up something to give touch vibration on panel.
(Since AGL uses Full HD palnel, you may need multiples of actuators?)

https://hackaday.io/project/3086-piezo-haptic-flex-module

I think this might be very primitive demo.
(Not really sure - since I have not tried it yet.  Perhaps choice of waveform and number of actuators may give you good result.)

Alternative (not necessarily the choice is binary) option might be that going with mor professional and high-quality devices, maybe collaborating with special device manufactureres.

There may be more complex or advanced haptic solution available.
e.g. simulating the surface by ultrasonic wave or static electricity, so that you can "feel" buttons on the panel.
But they may need very special hardware or panels, which probably be difficult to get or hard to control.

But it may mean the demo systm becomes very expensive, and not all of the members can easily try.


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