At present, a research team of the three parties of China, South Korea and the United States has recently developed a new type of surface electronic device, which is very likely to completely redefine what is called a wearable device.

Smart wearable devices, represented by smart watches, have entered our lives in a semi-red-hot way, although at present, "making a mobile phone" and "making a watch" has become a kind of The new normal, but even the wave of iWatch is less than one ten thousandth of the iPhone. In my opinion, wearable devices have not yet become a truly mature product. The ultimate reason is still an experience problem - the comfort of wearing, the battery life, and of course the most important problem, it is not cool. At present, a research team of the three parties of China, South Korea and the United States has recently developed a new type of surface electronic device, which is very likely to completely redefine what is called a wearable device.

The so-called body surface electronic devices - also known as "electronic tattoos" - are still in the experimental stage. The idea is to directly attach the electronic devices we know - consisting of chips, antennas, memory and other components. On the surface of the human body, functions such as monitoring body surface temperature and displaying user identity are performed. The monitoring of body surface temperature can make the work of doctors, liars, etc. easier; and the authentication function makes ID cards, credit cards, and even car keys go back and forth, as long as you wave your sleeves, you can take them away. What you want to take away is safer and more convenient than the QR code.

In my opinion, the prospect of this technology is very attractive, and it is likely that the future wearable electronic devices will be redefined. As the technology develops further, it may not be possible to move the entire computer to the human skin. dream. Since all this looks beautiful, why is research only stuck in the experimental stage?

Because electronic tattoos have a big bottleneck in energy supply: they can't make or store energy themselves, they can only be powered by microwaves emitted by third-party devices (the principle is the same as in domestic microwave ovens), but the external energy The supply is cumbersome and unstable – this obviously limits the evolution of electronic tattoos because complex functions are destined to be supported by a stable and adequate supply of energy.

Therefore, people have been hoping to directly convert and store energy on the surface, and a variety of ideas come into play – through piezoelectric materials (which convert the force applied to the outside into voltage), frictional electricity, heat The electricity generation method generates energy; the corresponding energy storage medium selects a battery with a higher energy density and a supercapacitor.

However, these devices are always too large and hard for human skin. Can you imagine just attaching a small dumbbell to your arm just to monitor your body temperature at any time? So the first step in a good electronic tattoo is to be able to self-generate, wear light and comfortable and best fit the human body's skin.

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