4.2 inch monochrome EPD Electronic paper E-paper E-ink Display screen | Parts, Components & Raw Materials | Optoelectronic Displays
4.2 inch monochrome EPD Electronic paper E-paper E-ink Display screen
Hong Kong
|
Factory in Chinese Mainland
Booth: 3F-A06 | Electronic Accessories |
Product Specification
Interface

SPI, I2C

Resolution

400x300

Color

Black, white

Brand

Radisplay

Model No.

KS-EP-0420-BW

Size

4.2 inch

Product Description

Black & White E-Ink Display Module

The Black & White E-Ink Display Module is an ultra-low power electronic paper solution designed for applications that require high readability, minimal energy consumption, and long image retention. Using electrophoretic display technology, it delivers a paper-like viewing experience with sharp contrast and wide viewing angles.

Unlike traditional LCD or TFT displays, E-Ink screens reflect ambient light instead of emitting light, making them comfortable for extended viewing and perfectly readable under direct sunlight.


Product Features

  • Monochrome display (Black & White)

  • Paper-like visual effect with high contrast

  • Ultra-low power consumption

  • No backlight required

  • Sunlight readable

  • Wide viewing angle (up to 180°)

  • Supports full and partial refresh

  • Image retention without power

  • SPI / I2C interface options (depending on model)

  • 3.3V low voltage operation


Technical Advantages

1. Extremely Low Power Consumption

Power is only required during image refresh. Once updated, the display content remains visible without continuous power supply, making it ideal for battery-powered devices.

2. Excellent Outdoor Visibility

Thanks to its reflective display technology, the screen remains clear and readable even in strong sunlight.

3. Eye-Friendly Display

With no flicker and no blue light emission, E-Ink displays reduce eye strain and are suitable for long viewing durations.

4. Flexible Integration

Compatible with common microcontrollers such as STM32, ESP32, Arduino, and Raspberry Pi, allowing easy system integration for embedded and IoT projects.


Typical Applications

  • Electronic Shelf Labels (ESL)

  • Smart price tags

  • Industrial instruments

  • IoT monitoring devices

  • Smart home control panels

  • Wearable devices

  • Portable electronics

  • Asset tracking tags

  • Medical equipment displays


Why Choose E-Ink Technology?

  • Longer battery life compared to LCD

  • Clear visibility in bright environments

  • Lower operating cost for long-term deployment

  • Reliable performance for static or low-refresh content



Production Lead Time

35 days