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Small rectangular 1.9 inch e-paper display board with 91 black and white segments on a green PCB

LORDWORLD

LORDWORLD 1.9inch Segment E-Paper Module 91 Segments Black/White I2C development board

SKU CH-721D-N1CGD

A 1.9 inch segment e-paper display with 91 segments, I2C interface and ultra-low power consumption for Raspberry Pi, Arduino or STM32 projects

  • 9 inch segment display with 91 segments for clear readouts
  • I2C interface connects directly to Raspberry Pi, Arduino or STM32 boards
  • No backlight retains last image indefinitely after power is removed
  • Ultra-low power draw only during refresh cycles extends battery life
  • Onboard MOS level shifting supports both 3.3 V and 5 V microcontrollers

1.9-inch 91-segment e-paper module

This 1.9-inch segment e-paper module presents 91 individually driven segments in black and white. It targets developers and hobbyists building low-power readouts such as temperature and humidity meters or digital counters. The display retains its last image without any backlight when power is removed. An onboard MOS voltage translator allows direct connection to 3.3 V or 5 V logic.

I2C interface for Raspberry Pi Arduino STM32

The module communicates over I2C, so it needs only two signal lines plus power from a host controller such as a Raspberry Pi, Arduino or STM32 board. No separate level-shifting circuitry is required because the translator is already fitted. Ultra-low power draw means the supply is only taxed during refresh cycles, freeing budget for battery-operated or energy-harvesting designs.

Suits segmented readouts not bitmap graphics

Developers who need a crisp, sunlight-readable segmented display for instruments, clocks or status panels will find this module a good fit. It is not suited to projects that require full bitmap graphics, greyscale levels or partial screen updates. Buyers needing higher segment counts, colour capability or a larger active area should look at alternative display technologies.

How it compares

Measured against everything we stock in Single-Board Computers & Dev Kits, at today’s prices. Recalculated every night.

Price $37.99
Cheaper than about 59% of the 1,420 comparable items (median $44.99).

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Specifications

Product
Brand nameLORDWORLD

Questions about this item

How many segments can the 1.9 inch display update before a refresh cycle becomes the limiting factor?

The module has 91 segments that only draw power during a refresh, so sustained use is limited by how often you rewrite the display rather than by continuous current draw.

Does the board generate noticeable heat or fan noise when driven continuously from a 3.3 V supply?

With no backlight and ultra-low power consumption limited to refresh events, the board produces negligible heat and has no active cooling, so it runs silently.

Which controller board and voltage level must I already have to communicate over the I2C interface?

You need a Raspberry Pi, Arduino or STM32 type MCU that can operate at 3.3 V or 5 V, because the onboard MOS translator handles both logic levels for the I2C bus.

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