tactile feedback

3 Articles

Close-up of a woman's neck with a haptic patch

Hacking Haptics: The 19-Sensor Patch Bringing Touch To Life

November 18, 2024 by 14 Comments

On November 6th, Northwestern University introduced a groundbreaking leap in haptic technology, and it’s worth every bit of attention now, even two weeks later. Full details are in their original article. This innovation brings tactile feedback into the future with a hexagonal matrix of 19 mini actuators embedded in a flexible silicone mesh. It’s the stuff of dreams for hackers and tinkerers looking for the next big thing in wearables.

What makes this patch truly cutting-edge? First, it offers multi-dimensional feedback: pressure, vibration, and twisting sensations—imagine a wearable that can nudge or twist your skin instead of just buzzing. Unlike the simple, one-note “buzzers” of old devices, this setup adds depth and realism to interactions. For those in the VR community or anyone keen on building sensory experiences, this is a game changer.

But the real kicker is its energy management. The patch incorporates a ‘bistable’ mechanism, meaning it stays in two stable positions without continuous power, saving energy by recycling elastic energy stored in the skin. Think of it like a rubber band that snaps back and releases stored energy during operation. The result? Longer battery life and efficient power usage—perfect for tinkering with extended use cases.

And it’s not all fun and games (though VR fans should rejoice). This patch turns sensory substitution into practical tech for the visually impaired, using LiDAR data and Bluetooth to transmit surroundings into tactile feedback. It’s like a white cane but integrated with data-rich, spatial awareness feedback—a boost for accessibility.

Fancy more stories like this? Earlier this year, we wrote about these lightweight haptic gloves—for those who notice, featuring a similar hexagonal array of 19 sensors—a pattern for success? You can read the original article on TechXplore here.

An image of a powered-off device screen. Part of the screen is raised in the configuration of a mobile keyboard. A ribbon cable extends from the left of a PCB underneath the screen and the PCB extends below the bottom edge of the screen with a sticker that has a stylized manufacturer logo that may read "Wisecoco."

Electroosmotic Haptics For More Tactile Touch Devices

May 2, 2023 by 18 Comments

If you’re like us, one of the appeals of retro tech is the tactile feedback you get from real buttons. Researchers at Carnegie Mellon have developed a new method for bringing haptic feedback to touchscreen devices.Labeled exploded view of the device stackup. The individual layers from top (output) to bottom (reservoir) are labeled Silicone, PCB & Electrodes, Adhesive, Glass Fiber, PET, Adhesive, PCB & Electrodes, Adhesive, Delrin, Adhesive, and PET. It also shows the different parts as sections of Output Layer (silicone), Pumping Layer, and Reservoir Layer (Adhesive, Delrin, Adhesive, PET).

Using an array of miniaturized electroosmotic pumps, the current prototype devices offer 5 mm of displacement from a 5 mm stackup which is a significant improvement over previous technologies which required a lot more hardware than the displacement provided. When placed under a flexible screen, notifications and other user interactions like the keyboard can raise and lower as desired.

Each layer is processed by laser before assembly and the finished device is self-contained, needing only electrical connections. No need for a series of tubes carrying fluid to make it work. Interaction surfaces have been able to scale from 2-10 mm in diameter with the current work, but do appear to be fixed based on the video (below the break).

You might find applications for haptics in VR or want to build your own Haptic Smart Knob.

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Tactile Feedback In VR, No Cumbersome Gloves Or Motors Required

April 26, 2023 by 9 Comments

This clever research from the University of Chicago’s Human Computer Integration Lab demonstrates a fascinating way to let users “feel” objects in VR, without anything getting in the way of using one’s hands and fingers normally. Certainly, the picture here shows hands with a device attached to them, but look closely and you’ll see that it’s on the back of the hand only.

There’s hardware attached to the hands, yes, but only to the backs. Hands and fingers can be used entirely normally while receiving tactile feedback.

The unique device consists of a control box, wires, and some electrodes attached to different spots on the back of the hand and fingers. Carefully modulated electrical signals create tactile sensations on the front, despite originating from electrodes on the back. While this has clear applications for VR, the team thinks the concept could also have applications in rehabilitation, or prosthetics.

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