Cables. We expect, like us, you have a love/hate relationship with them. On the one hand, for most applications when a TFT is connected to a touch, the complete Stack is connected over a short cable to a board. And that works just fine. After all, for this kind of application, a wireless PCAP makes no sense.
But consider another application. Like the whiteboard in the picture, where we want what we write to be instantly transmitted to our PCs. How can we make that happen?
In collaboration with SIS we have integrated a mesh PCAP behind the plastic cover of the white board and developed a special controller that can drive this plastic mesh stack.
The biggest challenge was connecting the touch to the PC. There can be no defined distance between the White Board and the PC, so it is difficult use a USB cable.
For this reason, together we developed a wireless solution to the touch controller that works over 2.4Ghz RF. In this way the whiteboard and PC can communicate over a distance of several meters – and even through walls!