Currently reading: Under the skin: How touchscreens give haptic feedback
As the debate continues around the usability of touchscreens, Nissan is developing ways to overcome the issues

As the great in-car touchscreen debate rumbles on, manufacturers remain totally committed, despite the fact that drivers are forced to take their eyes off the road to use them, even if only for a second or two. A well-thought-out combination of actual buttons for key, primary functions and the touchscreen for secondary functions can help, but things like searching for music albums, playlists or tracks in the infotainment system are still distracting.

To improve on those shortcomings, Nissan has chosen electrostatic feedback buttons for its new Ariya, grouped on the main dashboard and on the centre console. The technology generates what feels like a kick to emulate the sensation of pushing a mechanical button even though that isn’t happening. Sounds are generated at the same time to help distinguish one ‘button’ from the next. Nissan says the system has been tested by people with different size fingers and fingernails, a wide range of pressure forces, angles and gloved hands.

Haptic-feedback technologies, where the screen generates a sensation like a buzz or vibration in your fingertip when a button is hovered over or touched, can improve things. Hyundai showed off some research and found in trials that mixing audio with haptic feedback made a big difference to the ease of navigating around a touchscreen.

Audi introduced its MMI touch response in 2017 with electromagnet actuators behind a sprung display to deliver a mechanical pulse to your fingertip when a ‘button’ is pressed. Mercedes-Benz’s new ‘Hyperscreen’ also gives haptic feedback, generated by 12 actuators behind the screen.

A few ways of creating haptic feedback have been developed over the years, not all of them suitable for touchscreens.

Small eccentric-rotating-mass (ERM) motors spin an eccentric weight to generate vibration, while piezo actuators contain materials that change size when a current is passed through them, generating a high-frequency vibration if the current is varied very quickly. The faster an actuator can accelerate, the more intense the sensation – something that piezo technology does well.

Ultrasound can generate a haptic response before your finger touches the screen’s surface by disturbing the air close to the surface.

An electrostatic-haptic-surface technology called Tanvastouch has also been developed by US firm Tanvas for a variety of applications, including vehicles. It can go in a screen or surfaces in the cabin, including upholstery, to give haptic feedback. It generates friction between your fingertip and a surface to coincide with graphics so that fine textures, ridges and bumps can be felt as your finger moves over the features.

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You can feel what you see, with sliders clicking into place and differentiation between different visual textures on the screen, for example. The technology is so refined that it has even been demonstrated in online shopping applications, allowing you to get a sense of how different materials used in clothing feel in real life. It might also prove to be the secret ingredient missing since cars got too complicated for buttons and touchscreens took over the world.

Borgwarner's new motor

BorgWarner’s new IDM220 integrated drive module is a 400V EV machine that incorporates both the transmission and inverter and makes 335bhp and 3688lb ft. It will be used by “a leading Chinese luxury brand” when production starts in early 2023. A smaller version, the IDM146, will be supplied to the Hyundai Group for use in A-segment cars from 2023 and produces 181bhp. Both are based on the latest high- voltage hairpin-windings technology.


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Aerial 14 September 2021

What happens when they go wrong, days after the warranty expires? the cost to replace these screens will be massive and when the company stops providing updates they will be unusable. Cars are being designed to just last the life of a finance contract. I've yet to see a modern car dashboard that can beat my old Saab 900, Citroen CX or BMW E39 5 series for driver-focused usability.

Cobnapint 13 September 2021
The debate is over, we want rotary and pushbutton controls for the HVAC. Motion carried.

For fakes sake, just take a step back and look in amazement how far the human race has gone down the rabbit hole on the vehicle front. We have fake side air vents, fake exhaust outlets, fake engine sounds piped into the vehicle, fake indicator relay clicks, fake leather, fake aluminium trim, fake sump protectors and now fake button clicks.

catnip 13 September 2021

@xxxx Spot on.

And if motoring journalists stood up for the car buying public they would challenge the manufacturers more about these safety related matters. But they just sit on the fence to avoid offending them.