This cute, little display is a perfect addition for your Raspberry Pi. It features a 2.7″ e-Paper/e-Ink 3-color display with a resolution of 264×176. As many other Hardware Attached on Top (HAT) expansion boards for the Raspberry Pi, this one interfaces using the high-speed SPI interface. Simply plug it into the Raspberry Pi’s 40-pin header, and you can it to display beautiful, crisp images and text.
It carries 4 push buttons that can be read from pins #12, #16, #18, and #4. Given that this is not a Touch Screen, the buttons allows you to interact with the Pi without the need to connect peripheral devices (e.g., keyboard, mouse). These are great for making a basic user interface, such as an on/off button, changing data on the screen, etc.
e-Paper/e-Ink is a display technology that mimics the appearance of ink on paper. Unlike conventional displays, e-Paper reflects light like ordinary paper and is capable of holding text and images indefinitely, even without electricity. Due to its ultra-low power consumption, wide viewing angle, and clarity of display (even without power), e-Paper is an ideal choice for applications such as labels, badges, and others where fast refresh rates aren’t necessary. Some of its downsides are relative high price and slow refresh rates—in the order of 2 seconds for a full page—compared to OLEDs. Though animations aren’t really possible, we can use e-Paper in displays for things that don’t change too fast, for instance, ambient temperature and other Weather Station measurements!
- No backlight, displays content for a long time even when powered down
- Ultra-low power consumption, basically power is only required for refreshing
- Resolution: 264×176 pixels
- Interface: 3-wire SPI, 4-wire SPI
- Display color: black, white, red