Quote:
Originally Posted by viceant
What I fear about lit devices is that they can reflect too much light if you want, so, what's the difference with LED screens? Reflected light can damage eyesight too and that is why wear sunglasses is recommended if you go skiing, isn't it?
Without any doubt, eink readers manufacturers are interested in maintain the creedence eink is less damaging, but with more light reflected it couldn't be true if you don't turn up much the LED brightness.
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E-ink readers and tablets with LCD screens work on very different principles. The LCD screen changes color and produces no light. Behind it there's an LED panel that shines through the transluscent LCD into your eyes. That's why a lot of people have eyestrain from reading with them. I'm one of those people. I can read about 15 or 20 minutes on an LCD screen and then I have to stop or I can't read for several hours. Still, with a few minutes rest I can read another 15 or 20 minutes so that's not so bad.
Also, with LCD screens people tend to leave the light too bright. It looks good but it's hard on eyes.
E-ink works in a very different way. The screen is opaque. No light can shine through it. Instead there are LEDs, usually at the bottom or side of the screen and a thin layer over the screen designed to spread the light evenly across the screen. The result is that your eyes get reflected light just as you would get from reading a paper book or an unlit ereader while sitting under a lamp.
While I'm limited in my reading on LCD screens I can read as long as I like with e-ink.
Thing of a front lit e-ink screen as having an invisible lamp perched behind your shoulder shining onto the screen. It's magic.
By the way, I don't manufacture e-ink screens. I just use them.
Barry