Acreo has developed a technology for all-printed touchless keypads

Figure: Acreo has printed and monolithically integrated sensors, electrochemical transistors and electrochromic displays onto a flexible substrate, and the resulting all-printed organic electronic sensor system is suitable for human machine interface applications, for example touch less keypads. © Joanneum Research  Acreo has within the European project 3PLAST developed a technology that enables printing of a system including sensor elements, transistors and displays integrated into an all-printed human machine interface (HMI) sensor device. The sensor device is very sensitive to small