"The new black light emitting diode technology" can not only light and absorb external light source

People don't touch the screen by hand, they can completely use gestures to separate the mobile phones You can also recharge automatically with ambient light These black technologies may come true in the near future, thanks to a new light-emitting diode (LED) array that can emit light as well as absorb external light sources.

Researchers from the University of Illinois, Bana, Champaign and Marlborough, Massachusetts, Dow electronic materials company, recently in the United States "science" magazine published the relevant research progress. They show a new type of colloidal semiconductor nanorods that allow a single device to generate electro current while producing a photoelectric effect, and to generate electroluminescence by converting electric energy into light energy.

These nanorods, with a diameter of less than 5 nanometers, consist of three semiconducting materials, one of which emits and absorbs visible light, and the other two for controlling the flow of charge in the first material. The three materials work together so that the LED panel senses the external illumination and adjusts the brightness as it shines.

Because the LED switches so fast between the two functions of light and light that the naked eye cannot recognize the switch, the display panel looks very bright. At the same time, the mobile phone is different from the light sensor, and the photometry of LED panel light occurs at the pixel level, it can not only adjust the brightness of the panel light source according to the external environment, but also bring the finger across the screen above the induction of fine light line difference, gestures to allow non touch screen.

The researchers also found that the LED in addition to the light, can absorb the external light and converted into current, similar to the solar panel function, therefore, the future of LED screen mobile phone can be charged by light, a self powered mobile phone.

In addition, the new LED display can also act as a large parallel communication array, enabling large data exchanges between each other.

At present, researchers have successfully used the new red LED array demonstrates the related functions, trying to mix red, blue and green color LED color array display at the same time, by adjusting the composition of nanorod absorption capacity to improve LED.

For more LED related information, please click on the LED network or pay attention to the WeChat public account (cnledw2013).