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Frontlight Overview

The Inkplate 6FLICK features a built-in frontlight system designed to evenly illuminate the e-paper screen in low-light conditions. Unlike backlit displays, the frontlight enhances visibility while preserving the display's natural, paper-like appearance, making it ideal for reading or ensuring UI visibility in dim environments.

Key features​

  • Integrated white LED frontlight layer bonded with the ED060XC3 e-paper panel
  • 64 brightness levels (0 to 63) adjustable in real time via software
  • Uniform lighting across the entire display area
  • Low power consumption, with efficient LED drive circuitry
  • Can be used continuously without interfering with e-paper refresh operations
ℹ️
The frontlight is part of the original Kindle panel assembly reused in Inkplate 6FLICK. It is factory-integrated and fully supported in software.

Usage and design considerations​

  • Best suited for dark environments, indoor displays, or any use case with variable lighting
  • Brightness is set by an on-board MCP47A1 DAC over I2C, not by PWM, so there is no flicker at intermediate levels
  • Two calls control it: display.frontlight.setState() enables the circuit and display.frontlight.setBrightness() sets the level from 0 to 63
  • Works independently of the e-paper controller, so it will not cause ghosting
  • Compatible with both USB and battery-powered operation

Tips for effective use​

  • Set lower brightness levels when running on battery to conserve power
  • Automatically turn off the frontlight during sleep modes or prolonged inactivity
  • Consider pairing with a light sensor for ambient-responsive brightness control
  • Be mindful that maximum brightness will draw additional current, plan power budgets accordingly

Frontlight Brightness Example

Simple sketch demonstrating how to control frontlight brightness using software.