3D printing and the coating allowed to create glowing touchscreen display

British and American engineers have developed a simple method of creating a luminous touch surfaces of complex shape. You must first print based on the 3D-printer, and then sprayed on the desired area several layers, including a layer of phosphors are glowing when exposed to electric fields. The work was presented at the conference CHI 2020.

Displays, embedded devices usually have a flat shape and is made in the form of a single rectangular panel. This restricts designers and designers, especially when it comes to, for example, interior with a built-in display. There are also flexible OLED displays, and technology to produce them not only in the form of rectangles, but they are quite expensive. Among the research projects there are methods of drawing of fluorescent substances on the surface, but require to sum the individual electrodes to the electroluminescent material.

Engineers under the leadership of Ann Rudo (Anne Roudaut) from the University of Bristol suggested to use for creation of three-dimensional luminous touch surfaces a combination of 3D printing and deposition of functional layers. The problem with integration of electrodes, they decided to print with normal PLA plastic (polylactide), standard for 3D printing, and conductive PLA: plain printed base, and a conductive allows you to create a right in the subject conductive electrodes and tracks leading to the lower or lateral surface, where it can be connected to a current source.

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