Waveshare 13186 - 400x300, 4.2inch E-Ink raw display, SPI interface, without PCB Features No backlight, keeps displaying last content for a long time even when power down Ultra low power consumption, basically power is only required for refreshing Comes with online development resources and manual (driver board schematic, examples for Raspberry Pi/Jetson Nano/Arduino/STM32) Specifications Operating voltage 3.3V Display color Black/White Interface 3-wire SPI, 4-wire SPI Grey scale 4 Outline dimensions 91.0 × 77.0 × 1.18mm Full refresh time 5s Display size 84.8 × 63.6mm Fast Refresh time 1s/1.5s* DOT PITCH 0.212 × 0.212mm Partial refresh time 0.4s Viewing angle >170° Refresh power 26.4mW(typ.) Resolution 400 × 300 pixels Standby current <0.01uA (almost none) Advantages of EINK E-paper display utilizes microcapsule electrophoretic technology for displaying, the principle is: charged particles suspended in clear fluid will move to sides of microcapsule when electric field is applied, making the microcapsule become visible by reflecting ambient light, just as traditional printed paper. E-paper display will clearly display images/texts under lamplight or natural light, requires no backlight, and features nearly up to 180° viewing angle. It is usually used as e-reader due to its paper-like effect. dimensions WIKI: www.waveshare.com/wiki/4.2inch_e-Paper_Module
