Quote:
Originally Posted by waterlubber
The backlight on the Kindle PW appears to be somewhat reflective, as the LEDs illuminate the text, which reflects to your eyes. Dark mode would reduce the total amount of light leaving the device, and potentially reduce eyestrain if it helped the device match the background brightness of the room.
It doesn't save power, though, but it's entirely reasonable that it may be easier to view for some people.
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Actually, it's a frontlight not a backlight. An eInk display is opaque so you need a frontlight. The design of the frontlight (LED placement, light guide design, etc.) is a bit of a black art.