E Ink, short for electronic ink, is a type of display technology used in e-readers like Amazon’s Kindle. It mimics the appearance of ordinary ink on paper. The core of E Ink technology is a capsule filled with a clear fluid containing tiny pigmented chips—black and white—which are electrically charged. When a negative or positive electric field is applied, the corresponding black or white chips move to the top of the capsule, making the surface appear black, white, or shades of gray. This process doesn’t require continuous power to keep the image displayed, conserving battery life significantly. E Ink displays also reflect light like ordinary paper, making them easy to read in direct sunlight without glare. Despite its benefits, E Ink is slower to refresh than LCD or OLED screens, limiting its use to static images or text rather than video content. The technology has proven ideal for reading devices, offering a paper-like reading experience that is less straining on the eyes compared to traditional backlit screens.