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Touchscreen Overview

The Inkplate 4TEMPERA features a built-in capacitive touchscreen bonded to its ED038TH2 e-paper panel, providing smooth, direct interaction with the display surface. This integration makes it ideal for compact user interfaces, drawing apps, control panels, or other interactive applications, all while maintaining the low power consumption of e-paper.

Key features​

  • Capacitive touch layer integrated with the 3.8″ ED038TH2 e-paper display
  • Two-point multitouch support for gesture recognition or dual-finger use
  • Responsive touch tracking with fast screen updates
  • No additional external touch hardware is required, as the controller is built in
  • Works in both 1-bit (black-and-white) and 3-bit (grayscale) display modes

Usage and design considerations​

  • Optimized for use with bare fingers or capacitive-compatible styluses
  • The touch surface spans the entire display area, enabling full-screen interactivity
  • Touch input is temporarily disabled during screen refreshes, so avoid polling at those times
  • Ideal for compact interactive interfaces in embedded or portable projects
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Each display is sourced from previously deployed devices and thoroughly tested for touchscreen functionality during Inkplate 4TEMPERA production and quality control.

Tips for effective touch UI design​

  • Define touch regions visually using borders, labels, or icons
  • Provide immediate on-screen feedback for user actions
  • Avoid placing critical touch zones near the bezel to reduce accidental inputs
  • Add debounce logic or tap thresholds to avoid duplicate interactions
  • Try to minimize unnecessary screen updates while interacting to ensure consistent responsiveness