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Touchscreen Overview

The Inkplate 4 TEMPERA 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 — 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 4 TEMPERA 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