According to LED Online yesterday, a team led by Professor Wang Zhonglin from the Georgia Institute of Technology developed a new system that converts zinc oxide nanowire arrays into tiny LEDs. The system is expected to promote the rapid development of electronic signatures, fingerprint scanning and robotic touch skin.
Nanowires from gallium nitride film
According to the report, each "line" responds to externally applied mechanical stress in a shiny manner. By analyzing tiny "spot mosaics", the computer can produce a high-resolution image of surface pressure. Since 2009, piezoelectric LED technology has been developing. The nanowires are derived from a layer of gallium nitride film and the light is produced from contact with the bottom substrate. When these "lines" encounter any stress changes (such as the pressure of a stylus or fingerprint ridge), a charge is generated, the greater the stress, the more the charge, and the higher the brightness.
According to reports, this piezoelectric LED array can sense the pressure within a few milliseconds and then recover within a few milliseconds. The technology currently has a resolution of up to 6,300 dots per inch, but researchers believe that precision can be improved by making smaller "lines".
Focus on GaN stocks
Du Liang, senior investment consultant of Shenzhen Newland, said that the successful development of the system is expected to promote the rapid development of electronic signatures, fingerprint scanning and robotic touch skin, which is expected to bring benefits to listed companies in the above fields. In addition, the concept of LED and GaN is also expected to be promoted. As nano-scale piezoelectric LED arrays promote the development of robotic touch-sensitive skin technology, the focus is on a layer of gallium nitride film, so investors can focus on the concept of gallium nitride, and related listed companies may attract a lot of capital investment. It is recommended to pay attention to dry photo optoelectronics, Ruifeng Optoelectronics, Feile Audio and so on. However, Du Liang also reminded investors to pay attention to market speculation and prudent operation.
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