I can't help you much as I know very little about this.
I found a few things. A thread here:
A guy here says it doesn't have an active digitizer. I don't know if he's blowing smoke.
http://www.tomsguide.com/answers/id-2856378/acer-aspire-471t-digitizer.html
Difference in styluses
Specs for the panel
http://www.panelook.com/B140HAT02.0_AUO_14.0_Assembly_overview_26952.html
How I found the panel
http://www.ultrabookreview.com/9304-acer-aspire-r14-review-2/