Multiple touchfoils connected to one PC

Often customers raise the question if it is possible to run multiple touchfoils over multiple displays connected to the same PC?

Yes, it is possible. However there are limitations in functionality.
Please read the test case below to ensure the functionality will fit your requirements.


Test case

We have run experiments with two of our controller board models that we currently use: SU2-80 (dual-touch), and the AXX (dual & multi-touch) and we confirm that running multiple touchfoils connected to the same PC is possible. Note: the larger format controller board BXX (dual & multi-touch) should also provide the same result.

In our test, both were set up so that there were two displays with touchfoil sensors on the glass over each, with both displays and touchfoils connected to one Windows 10 PC (via HDMIs and USBs respectively). The Windows display settings were set to “duplicate”. It was found that both touch sensors reacted accordingly, and were interpreted correctly by the built-in Windows HID touch driver.

Given that it is possible to press on the touchscreens at the same time, producing multiple touch events, most applications seem to only respond to the first touch that has been recognised. The other touch becomes “secondary” and is generally ignored. This helps prevent “cursor-fight” between the two input devices. You can see this “cursor fight” phenomenon if you connect two mice to the same PC and try to use them simultaneously. Therefore the assumed use-case would be one person touch one screen at a time (never simultaneously).

To configure each touchfoil, there must be only one connected to the PC at a time. This is because the configuration software will recognise only 1 touchfoil sensor at a time. Therefore, for configuration, we advise that each touchscreen is setup/calibrated separately (1 after the other), before final connection of both to the PC during normal operation. Because we store all settings and geometry calibration on the controller board, you could, in theory, have two different sized displays/touchfoils, provided the graphics driver on the PC could handle this.

This will not work as intended if the displays are set to “extend” instead of duplicate, as the touch reaction is limited to the primary screen (i.e. even if you touch the second “extended” display, the touch cursor will appear on the primary display).

This setup is best achieved when the touchscreens are situated close to each other and close to the PC as you will need to run display cables and USB cables (for the touchfoils) from the displays to wherever your PC is.


Please contact our support team should you require further clarifications.