E Ink is a technology that mimics the appearance of ink on paper. It uses tiny microcapsules filled with black and white particles that can be rearranged to form text and images. This unique feature allows screens to be easily readable in bright sunlight, making it ideal for devices like e-readers. Unlike traditional screens, E Ink displays consume very little power because they only use energy when changing the content. This means that devices like the Amazon Kindle can last for weeks on a single charge. The result is a comfortable reading experience that closely resembles reading a physical book.