LED display can not only be attached to clothes but can also be washed ã€Full text】
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The number of pixels of the display screen is 32×32×RGB, and the fineness (pixel density) is 13 ppi, that is, the pixel pitch is about 2 mm, and the average luminance exceeds 200 cd/m 2 . The driving voltage is 7V.
The most important part of this display is the use of serpentine copper wiring for the wiring between the connected pixels, thereby obtaining bending and drawing resistance and stretchability. Serpentine cabling has also been used before, and is used by Professor John Rogers's research lab at the University of Illinois in the sensor terminal. But for the first time for the display.
The substrate material is a polyimide resin, and the sealing material uses rubber and can be directly attached to the cloth for washing. According to reports, the manufacturing technology of the display uses mass production technology and can be quickly realized.
By the way, in the screen-associated society "SID 2015" held in June, related papers of the previous generation of development products of this display were published, and Matsushita's researchers were the first authors. At that time, the development product had a pixel count of 45×80×RGB, a pixel density of 8.5 ppi (3 mm pitch), a luminance of 30 cd/m 2 , and a driving voltage of 5 V. It was a passive matrix display.
