3.97-inch Quad-Color E-Paper Screen E-ink Display 480x800

Description

ER-EPD3.97-1RY is a 3.97-inch four-color electrophoretic e-Paper (E-Ink) display​ with a 480×800 pixel​ portrait format (51.84×86.40 mm active area, 56.24×96.62 mm with FPC folded) rendering white, black, red, and yellow​ pigments. Because it is reflective e-Paper rather than a backlit LCD, it is sunlight-readable​ from a true 85°/85°/85°/85°​ viewing cone, draws ≤10 mA during image update​ and only ≤5 µA in standby, and holds the last image with zero power after refresh—ideal for battery-driven static-content devices such as shelf labels, tags, and signage.

ER-EPD3.97-1RY integrates the SSD2677​ controller in COG packaging and talks to the host over 3-wire or 4-wire SPI​ (SCL, SDA, DC, CSB, RST, BUSY on the 24-pin 0.5 mm ZIF FPC, plus BS bus-select and optional TSCL/TSDA for an external I²C temperature sensor). Logic runs at VDDIO/VCC 2.5–3.6 V typ. 3.0 V​ (absolute max 4.0 V on VCC), with an on-chip charge pump generating the VSH1/VSH2/VGH/VSL/VGL/VCOM rails so no external high-voltage supply is needed. The 0.108×0.108 mm dot pitch and bistable pigment cell need no frame buffer refresh while idle.

We provide SSD2677 demo code, SPI waveform libraries, and full-refresh/partial-refresh examples for Arduino, STM32, ESP32, and Raspberry Pi​ on buydisplay.com. The datasheet explicitly warns: do not leave the panel powered without refreshing—put it to sleep or power off between updates, and run a full refresh every 24 hours to 10 days​ to avoid permanent ghosting; partial refresh alone cannot clear accumulated image sticking, and refresh must be triggered indoors (not under direct sun mid-refresh).

Rated for 0~+40 ℃ operating​ and −25~+60 ℃ storage, the module is built for indoor-to-outdoor transit tags, shelf labels, and signage that spend most of their life unpowered. It is not​ a video-rate display—typical full refresh is seconds, not milliseconds.

That is suitable for a wide range of applications, including electronic shelf labels, warehouse bin tags, price tags, medical/industrial status cards, smart-home scene labels, and any low-power MCU/SBC project that needs a sunlight-readable 4-color static display with weeks-to-months of battery life per refresh.

To fastly get started, please consider our e-paper panel connected with arduino shield or raspberry pi HAT. Libraries and samples are available for all of them.

Package Content

◇ e-Paper Display Panel x 1

* Please select if you wish to have optional accessories.

Application

◇ Logistics

◇ Reusable Transit Item

◇ Station Terminal

◇ Smart Card

◇ Smart Identity Tag

◇ Seat Number Tab

◇ Smart Luggage Tag

◇ Smart Coffee Cup

◇ Smart Home Application

◇ Identification & Access

◇ Display the Latest Weather Forecast

◇ Display Your Own Twitter Feed

◇ E-paper room booking system

◇ Other IoT (Internet of Things) Devices

◇ 1D/2D Barcode Electronic Shelf Label

Datasheet

Format	Documents Name	Language	Update Date	Size
	ER-EPD3.97-1_Datasheet	English	Aug-18-2026	3.0M
	Controller SSD2677_Datasheet	English	Sep-17-2023	630K

 

Tutorial - 8051

Format	Documents Name	Language	Update Date	Size
	8051 Interfacing and Demo Code	English	Aug-18-2026	268K

Tutorial-Arduino

Format	Documents Name	Language	Update Date	Size
	Arduino Library and Example for 4-wire SPI and SD Card	English	Jan-6-2026	24K
	Arduino Interfacing Document	English	Jul-10-2019	160K

Tutorial-Raspberry Pi

Format	Documents Name	Language	Update Date	Size
	Raspberry Pi Library and Example	English	Mar-23-2026	231K
	Raspberry Pi HAT Interfacing Schematic	English	Jun-14-2019	194K

Tutorial - STM32

Format	Documents Name	Language	Update Date	Size
	STM32_Example	English	Aug-18-2026	6.4M