By altering the friction encountered by a person's fingertip, a new formula developed by Disney can create the perception of a 3D bump on a touch surface, without having to physically move the surface. This method can be used to simulate the feel of a wide variety of objects and textures.
In the experiments, the researchers used electrovibration to adjust the friction between the sliding finger and the touch surface with electrostatic forces. They created and validated a "psycho-physical model" that closely simulates friction forces perceived by the human finger when it slides over a real bump. "Touch interaction has become the standard for smartphones, tablets and even desktop computers, so designing algorithms that can convert the visual content into believable tactile sensations has immense potential for enriching the user experience," Poupyrev said. "We believe our algorithm will make it possible to render rich tactile information over visual content and that this will lead to new applications for tactile displays.
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