E Ink display shows the data on the screen as same as it seen on printed paper.
There is no backlight so it can keep displaying the last content for a long time even when the power is down. It doesn’t need a continuous power supply to display the ) data on the screen. Such displays are widely used to show Time tables, Price boards, Notice boards, or even for Digital Clock.
Explore more to buy Collective sizes e ink displays, available from 1.5 inches to 7 inches with an integrated SPI interface for connecting with controller boards like Raspberry Pi/Arduino/Nucleo, etc.

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