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...
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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 board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny 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 thin flat flexible cable or connector style often used where space is tight or some movement is needed, commonly for displays, cameras and other high-density connections. Connecting to an FPC connector generally needs a matching cable with the correct pin count, pitch and contact orientation.
- RP2040
- The RP2040 is a dual-core Arm Cortex-M0+ microcontroller chip from Raspberry Pi, used on many maker boards and offering programmable I/O, multiple GPIO pins and reasonable processing speed. Code and accessories built for that chip should work where RP2040 compatibility is listed, though demanding tasks such as reading a camera can require careful pin allocation and timing.
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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
Source Code
Open-source libraries, firmware & example projects for this product
e-paper display driver for Arduino
fa64859
6 days ago
· 394 commits
- .github Update CI action versions about 3 years ago
- examples ThinkInk_gray4 example: detail the 1.54" SSD1681 entry (#4196) 10 days ago
- src Fix clang-format line length in comments about 2 months ago
- unsupported fix rotation & clang about 1 year ago
- .clang-format fix rotation & clang about 1 year ago
- .gitignore add monochrome 4.2" SSD1683 12 months ago
- library.properties Bump version to 4.6.10 20 days ago
- license.txt closes https://github.com/adafruit/Adafruit_EPD/issues/71 12 months ago
- README.md Update README.md - fix CI badge almost 2 years ago