Category: Tech

A 4.2-inch E-Ink display is an electronic paper display (EPD) with a diagonal size of 4.2 inches, commonly used for low-power, high-visibility applications such as e-readers, shelf labels, IoT devices, and information boards. E-Ink technology mimics the appearance of printed paper, using microscopic capsules filled with black and white particles that move when an electric field is applied. The screen only consumes power when changing the image — it can hold the display without energy.