Compare Wacom EMR versus resistive technology:
A resistive sensor consists of a sandwich of two conductive coated plastic films. This sandwich makes up the top layer on the signature pad or display. When you press down on the top surface with a finger or a pointed plastic stylus, the electrical resistance of the sandwich changes. The variation in distance between the two plastic layers allows for the detection of the pen location and pressure intensity.
EMR pen input from Wacom offer significant advantages over resistive technology:
- More Robust: Resistive input devices require a flexible, plastic surface, which quickly becomes scratched, even with normal use. If the resistive surface is worn significantly, the device may cease to capture pen data. Wacom signature pads and pen displays with EMR technology utilize a hardened glass protective surface that is highly resistant to scratches, and the pen will continue to operate even if the surface area is damaged. This results in a very long, useful life, with a screen that is sharp, clear, and easy to read.
- 100% Palm Rejection: Since resistive technologies respond to any form of pressure, the user can accidentally activate screen buttons or keys with the knuckles, fingers, or palm. Wacom EMR pen input reacts only to electrical signals from the pen, so no accidental activation is possible, so our pen technology inherently provides 100% palm rejection.
- Better Accuracy: Resistive input technology provides much less resolution (number of datapoints collected per given distance). In addition, pressure sensitivity from a resistive touch sensor is not linear (the pressure readings in the center of the sensor are different than near the edges). Wacom EMR technology provides very high pen resolution (2540 lines per inch), and the pressure sensitivity curve is much more linear, meaning that pressure readings taken at all points on the surface are much more consistent compared to resistive technology. This results in a consistent capture of signature and pressure data that is much more representative of how a user really signs, draws, or writes.