ePaper Display Module Design Manual

┃What Is a ePaper Display Module?

An ePaper display, also known as electronic paper, is a reflective display based on E-Ink technology that provides a reading experience similar to real paper. Unlike traditional LCDs that require backlighting, ePaper utilizes ambient light for image rendering, making it easily readable even under direct sunlight. ePaper display modules are ideal for applications requiring long-term static content, ultra-low power consumption, or updates without constant power.

Feature: Overview of ePaper Display Modules

• Zero power for static display: Once updated, the screen consumes no additional power, significantly extending battery life.

• Superior readability: Reflective display technology eliminates blue light, enabling fatigue-free viewing over extended periods.

• Excellent sunlight visibility: Clear and sharp display even under direct sunlight.

• Ultra-low power design: Ideal for battery-powered and energy-harvesting systems, supporting wireless deployment. 

┃Recommendations

Key Design Considerations for Successful E-Paper Module Integration

• Power Design
  E-paper modules require brief surges of current during screen refresh. It is recommended to use low-impedance lithium batteries or large-capacity capacitors to stabilize voltage. Additionally, if a low-power MCU is used, the SPI interface should support speeds above 2 MHz to maintain stability.

• Mechanical Integration
  Most modules use glass substrates and are fragile. Protective space should be reserved in the product design or reinforced with a cover glass. During OCA lamination, ensure surface flatness and apply even pressure to prevent display issues or damage.

• Refresh Mechanism
  To avoid ghosting, perform alternating black and white screen clears during content changes. For applications requiring frequent or fast updates, use modules that support partial refresh and optimize layout strategies accordingly.

• Environmental Adaptability
  Storage and usage conditions significantly affect e-paper lifespan. Avoid high temperatures, humidity, and direct sunlight. Electrostatic discharge (ESD) protection is also recommended during assembly and transportation to safeguard driver ICs.

• System Integration and Data Efficiency
  Due to large data volumes, use image compression techniques to reduce communication bandwidth. If MCU resources are limited, external buffer RAM can help store image bitmaps and improve refresh performance.

┃What Can Eileentek Do for You?
We offers more than just hardware products during the integration of e-paper modules — we provide complete technical support and customized services to help ensure successful implementation:

• Module Selection and Specification Guidance
  We help clients choose the most suitable module based on usage scenarios and budget — including size, color, resolution, and interface options.

• Hardware Integration and Circuit Support
  We provide reference schematics and layout suggestions to assist with stable MCU-to-module connections and power design.

• Driver and Development Resources
  We offer driver support, update process examples, and display code templates for popular platforms such as STM32, Arduino, and ESP32.

• Customized Development and Lamination Services
  We support custom-size module development and offer processing services such as glass cover lamination, optical bonding (OCA), and scratch-resistant coating.

• Technical Support and Co-Development
  We work with clients on prototyping, system validation, display refresh testing, and software tuning — helping to accelerate development and reduce risks.