How does an e-reader screen work?
Quick Answer
Most e-readers use 'electronic ink', where millions of tiny capsules containing black and white particles are moved by electric charges to form text that looks like print on paper.
The Full Story
An electronic ink display contains millions of microcapsules, each about the width of a human hair, filled with clear fluid and tiny white and black particles carrying opposite electric charges. Applying a positive or negative voltage beneath each area pulls either the white or the black particles to the surface, making that spot appear light or dark. Unlike phone and tablet screens, e-ink does not shine light at your eyes; it reflects ambient light like paper, so it is easy to read in bright sunlight. The display only uses power when the image changes, which is why e-readers can run for weeks on a single charge. The technology was developed at the MIT Media Lab, leading to the founding of the E Ink Corporation in 1997.
Key Facts
YouTube Angle
Suggested video title for this topic:
"Why an e-reader looks like paper and lasts for weeks."