How E-Paper Trades Refresh Speed for a Steady Image

How E-Paper Trades Refresh Speed for a Steady Image

An electronic paper display can hold a page without continuously redrawing it.

The panel moves charged particles to change the appearance of each pixel. Reflective viewing is comfortable in bright light, and a front light can make a page readable in a dim room.

Fast partial updates can leave traces of earlier content. A slower full refresh clears more of that ghosting, which is why readers and note devices often offer several display modes.

Compare page turns, scrolling and handwriting separately. Each activity stresses a different part of the trade-off between refresh speed, contrast and image retention.

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