Adafruit
3.7 inch 416x240 Tri-Colour eInk Bare Display
· MPN: ADA6394
E-Ink and E-Paper panels are excellent for low-power projects that need a daylight-readable display. The image remains visible even when power is disconnecte...
E-Ink and E-Paper panels are excellent for low-power projects that need a daylight-readable display. The image remains visible even when power is disconnected, giving a high-contrast, paper-like result that suits signage, labels, dashboards and other static displays.
This bare 3.7 inch tri-colour display provides red, black and white pixels at 416 x 240 resolution. It uses the UC8253 chipset, so your firmware or driver board will need support for that controller.
Please note that this is only the display element. It needs to be plugged into a board with a standard 24-pin FPC e-paper connector, such as a Feather RP2040 ThinkInk, eInk Feather Friend, eInk Breakout Friend, or a 24-pin eInk/ePaper extension cable with matching FPC adapter.
Adafruit provides an Arduino library that handles the display driving and lets you use it like an Adafruit_GFX-compatible display. Each pixel can be red, black or white, but colours cannot be mixed or overlaid to make extra colours such as orange.
Specifications:
- Display size: 3.7 inch diagonal
- Resolution: 416 x 240 pixels
- Display type: Tri-Color eInk / ePaper Bare Display
- Colours: Red, Black, White
- Pixel colours: 416x240 red or black ink pixels and a white-ish background
- Chipset: UC8253
- Connector: standard 24-pin FPC e-paper connector
- Library support: Arduino library with Adafruit_GFX compatible display interface
- Technical Details: Datasheet
Ideal for makers who want to build a custom eInk setup and already have, or plan to add, a suitable 24-pin e-paper driver board.
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- ePaper
- A display technology that looks more like printed paper than a glowing screen and usually keeps its image visible with very little power. It matters for projects such as labels, badges, and status screens where readability and low power use are more important than fast animation.
- FPC
- FPC stands for flexible printed circuit, a flat flexible cable or connector style often used where space is tight. It matters because this breakout needs the correct pin count and pitch FPC cable to connect reliably to the display or high-speed interface.
- RP2040
- A microcontroller chip used on many maker boards, with enough speed and flexible I/O for some camera and display projects. Compatibility with RP2040 matters because camera modules often need many pins and careful timing to read image data successfully.
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Displays & Screens
3.7 inch 416x240 Tri-Colour eInk Display Datasheet
Datasheet · 7.0 MB · Click any page to view full size
Supplier page — adafruit.com
Supplier Description · 987.7 KB · Click any page to view full size
