this post was submitted on 29 Jan 2024
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You can't backlight e-paper. You could get a book light, though!
What? You absolutely can. Look at... Every recent model of kindle.
E-ink displays are opaque. The Kindles with illumination use side-lighting with a layer of plastic that guides the light across the surface of the device. They are effectively front-lit using LEDs situated around the perimeter of the screen.
The use of the term backlight is common, but even Amazon refers to it as a "front light" (it's edge-lit, of course, as you say). Bit like using a floppy disc as the "save" icon, or walling wireless networks "wi-fi" despite having nothing to to with "fidelity". We all know what it means.
Except for me, apparently. I'll have to update my vocabulary: backlight can mean front light.