Samsung researchers: OLED skin patch can replace fitness bracelets

Samsung researchers: OLED skin patch can replace fitness bracelets

Samsung researchers: OLED skin patch can replace fitness bracelets Among the most important recent achievements in the field of display technology, We can mention the development of flexible display panels, which paved the way for making foldable smartphones. The Chinese company Royole introduced the world’s first foldable smartphone with the FlexPai phone, but without a doubt this Samsung is one of the main contenders in the foldable phone market. About two weeks ago, Royole announced that it has acquired the technology to make the first stretchable display in the world. But Samsung, which does not want to be left behind, recently designed a type of flexible and very thin display called “skin patch” announced.

The results The study of the research group affiliated with the “Samsung Advanced Technology Foundation” (SAIT), which was recently published in the scientific journal Science Advances, shows that the company’s researchers have succeeded in making a prototype of a flexible OLED display that can be stretched in any direction like a rubber bracelet. and change shape. According to some experts, among the most important findings of the current research is that this product proves the commercialization potential of elastic devices for the first time in the industry.

This product is called “skin patch” because it is placed on the bottom of the wrist and on the user’s skin. According to Samsung researchers, stretching this screen up to 30% has no effect on it and even after It has been pulled a thousand times and continues to work as before. Now, the question is, with the help of what new technology has Samsung managed to develop this patch?

As you probably know, current foldable displays can’t withstand that much pressure. Therefore, to overcome this problem, instead of using plastic materials (which are used in the production of current flexible displays), Samsung researchers used another material called “elastomer”; An advanced material that has high elasticity and resilience. Then, in order to increase the resistance of this display against heat and also to adjust the pressure caused by stretching, they changed the molecular composition of this material to some extent. This allowed the researchers to add a semiconductor component to the display.

This part is nothing but a PPG sensor (plethysmograph or optical volume meter). Thanks to this sensor, the new skin patch – which is placed under the user’s wrist – can easily measure his heart rate. In this way, Samsung’s new product can replace fitness bracelets. According to the Samsung research team, another elastic electrode material is also used in the construction of this patch, which prevents the deformation of the elastomeric area. According to Yeongjun Lee, a Samsung researcher, thanks to this action, the space as well as the electrodes between the pixels can be stretched and returned to the original state, without the OLED pixels themselves being deformed.

According to the research team, when the elastomer becomes more resistant to heat and chemicals, it will be possible to embed semiconductor parts and health tracker sensors in this skin patch; Just like in the current wearables (such as Apple Watch) We witness it. Of course, Samsung researchers have gone one step further and claim that by placing this product on the skin, its adaptation It will be easier with hand movements. Also, due to the increased sensitivity, it will be possible to continuously measure the heart rate. The observation of the research team during the trial period of this display indicates that the movements of the user’s wrist (even with a 30% stretch) did not have an adverse effect on its performance, and even the signal received in this way (compared to the state in which the sensor does not move) It has been up to 2.4 times more powerful.

Finally, at the moment, we are only facing a prototype, and the research team needs more work to commercialize it. From the appearances, it is clear that the research team should work more on the OLED resolution, flexibility and tracking accuracy of this product and raise its performance level to be suitable for mass production. It is expected that in the future we will see the production of similar products that can perform tasks such as measuring blood oxygen saturation level, reading nerve and muscle tape and taking blood pressure. It is not unlikely that such products will be able to help the medical staff in monitoring special patients and babies in the future.

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