Computer scientists from Saarbrücken have developed a technique that could enable virtually anyone to print out customized displays of their own in future – in all shapes and sizes and onto various materials.
A regular home printer could be used to print wafer-thin displays onto paper, so these printed displays might present custom-designed icons or even respond to touch. The researchers are presenting their award-winning approach at the computer trade show Cebit in Hanover from March 16th to March 20th (Hall 9, Booth 13).
The postcard shows a vintage automobile. With the push of a button, the rear axis and the steering wheel rod of the vehicle light up in the same colour. This is made possible by two parts of a flexible touchscreen display that match up exactly with the shape of the car parts depicted. A team of computer scientists around Saarland University researcher Jürgen Steimle printed the display on a regular inkjet printer. The DIY display is electroluminescent: It emits light when under an electric current. The same effect is used to illuminate dashboards in vehicles at night. Steimle is head of the research group “Embodied Interaction” within the Cluster of Excellence “Multimodal Computing and Interaction”, where Simon Olberding also conducts his research.
“So far, nothing like this has been possible,” Olberding says. “Displays were produced for the masses, never for one individual user.” That is precisely what Olberding and Steimle wanted to change. The technique they developed is as follows: Users can create a digital template of the display they are designing, using software like Microsoft Word or Powerpoint. Making use of one of the two methods the researchers have been presenting, the template can now simply be printed out. Both methods have their distinctive strengths and weaknesses, but either can be performed by laymen in minutes, or in two to four hours, depending on the exact procedure. The printed results are relatively high-resolution displays that are just one tenth of a millimeter thick. To cover an entire standard printer page with a display layer currently costs around 20 Euros, the most expensive part being the special ink that is required.
But as the method is not limited to paper, even plastics, leather, ceramics, stone, metal or wood could be used as a base for all kinds of two-dimensional and three-dimensional printed shapes. The display surface can be constructed from a single segment (a shape, outline, pattern, or raster graphics), from several segments or from otherwise structured matrices. “With this method, we can even print touch-sensitive displays,” says Olberding. And the conceivable applications are diverse: Displays could be integrated into almost every kind of everyday object – into paper objects, but also into furniture or household items, briefcases or clothing. So you could modify the wristband of a watch with a display in such a way that it lights up when an instant message arrives, for example. “And if we now combine our approach with 3-D printing, we can print three-dimensional objects, which are able to display information and respond to touch as well,” says Steimle.
Read more: DIY Printing Custom Touch-Sensitive Displays
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