Working Principle: The electronic ink screen operates on the principle of charged nanoparticles suspended in a liquid, migrating under an electric field to create a display effect similar to traditional printed paper through ambient light reflection. Wide Viewing Angle: The ink screen is clearly visible in various lighting conditions, including natural light, without backlighting, offering a viewing angle of nearly 170 degrees or more. Applications: The ink display supports partial refresh, low power consumption, and wide viewing angles, making it suitable for display applications like shelf labels and industrial meters. Compatibility: With very low power consumption, primarily during refresh cycles, it can connect to main control boards like Raspberry, Jetson, and Nucleo. Retains Display Content: No backlight is required, and the screen content can be maintained for extended periods, comparable to traditional paper displays. Item Type: 1.54 inch Electronic Ink Screen Material: Electronic Ink, PCB Model: 1.54 inch e-paper Working Voltage: 3.3V Grayscale Level: 2 Screen Size: 1.54 inch Resolution: 200x200 PX Communication Interface: 3 Wire SPI, 4 Wire SPI Local Refresh: 0.3s Global Refresh: 2s Display Size: Approx. 27.0 x 27.0 mm / 1.06 x 1.06 in Viewing Angle: >170 degrees Display Color: Black, White