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Braille display

07.02.2005

German engineers have created a display for the blind out of metal with shape memory.

In order for, say, a programmer, even who has lost his sight from countless hours spent in front of the monitor, to continue to delight society with the fruits of his creative work, as well as to enable all blind people to use information technology, engineers design displays for the blind . They are based on the same Braille alphabet that is used in books - a set of raised dots; they are felt with fingers and read the text.

A new solution to the problem was proposed by German scientists from the center "CAESAR" (Center for Advanced European Research and Research), headed by Dr. Bernhard Winzek. The display they proposed is based on thin films of several shape memory alloys deposited on a silicon substrate. Under the action of current, the metal heats up, bends and pushes the plastic pin. It is the person working behind such a display who feels it. Another electrical signal returns the pin to its original position.

The display turned out to be very economical: electricity, and even then in the form of short pulses, it needs only at the moment of the image of a particular letter.

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New implant allows you to hear the light 21.07.2018

A group of German researchers have published a paper on a new type of cochlear implant that uses light to simulate sound.

For their study, German scientists began training Mongolian gerbils to jump over obstacles when they heard an alarm. The researchers then injected the gene directly into the cochlea, the inner ear of gerbils, using a virus. This genetic upgrade allowed light to activate neurons in the animal's cochlea. After that, they implanted an optical fiber that could turn on and give light right inside the ear.

When the scientists turned on the fibers, and they began to emit blue light, the rodents began to jump over obstacles as if they heard the sound of an alarm. When the researchers deafened some of the animals and turned on the fibers again, the gerbils were still jumping as if they "heard" the light, although they could no longer physically hear the sound.

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