Upstairs: This kind of LED display can not only be "worn", but can also be washed

Holst Centre, a Dutch research institution, the Belgian Microelectronics Research Center (IMEC), and the Center for Microsystems Technology (CMST), a research institute at Ghent University in Belgium funded by IMEC, announced the development of a flexible display using LED that can display in color. According to reports, the display is an active matrix display using the compound InGaZnO TFT, which can be attached to cloth and washed. In addition, Panasonic also participated in the development of this display.

The display has a pixel count of 32×32×RGB and a fineness (pixel density) of 13ppi, which means the pixel pitch is about 2mm and has an average brightness of over 200cd/m2. The driving voltage is 7V.

The most elaborate aspect of this display is that the wiring connecting the pixels uses serpentine copper wiring, thus achieving bending and tensile tolerance and stretchability. Snake wiring has been used before, and the laboratory of Professor John Rogers at the University of Illinois used it on sensor terminals. But this is the first time it has been used in a display screen.

The base material is polyimide resin, and the sealing material is rubber, which can be attached to clothing and washed directly. According to reports, the manufacturing process of the display screen uses mass production technology and can be quickly put into practical use.

By the way, a paper on the previous-generation development of this display was published at the display-related association "SID 2015" held in June, with Panasonic researchers as the first authors. The product developed at that time had a pixel count of 45×80×RGB, a pixel density of 8.5ppi (3mm pitch), a brightness of 30cd/m2, and a driving voltage of 5V. It was a passive matrix display.