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Old 08-26-2011, 02:21 PM   #16
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Originally Posted by HarryT View Post
Sorry, what I meant was that if the brightness of an LCD screen is set correctly, there's no difference in its appearance (as far as the amount of light reaching your eyes) to using an eInk screen, and really no reason at all that it should cause eyestrain. Most people have the brightness of LCD screens set far too high - that's like looking into a flashlight.
I disagree with this.

I totally agree that high brightness settings cause more eye fatigue. That is why i generally use my laptop at the lowest brightness setting especially in night.

But even if i use the lowest brightness setting, it is nowhere near e-ink. I tried various LCD screens (ipad, 102 cm LED tv, laptop screens, desktop monitors) and all of them caused eye fatigue even at the lowest brightness settings.

But i think it really depends on the user a lot. I have a friend who can begin and finish a book from his laptop screen which i am pretty sure i will never ever be able to do.
Last edited by reprep; 08-26-2011 at 08:47 PM. Reason: it is cm, not inch. Silly me.
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Old 08-26-2011, 02:43 PM   #17
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Quote:
Originally Posted by reprep View Post
I disagree with this.

I totally agree that high brightness settings cause more eye fatigue. That is why i generally use my laptop at the lowest brightness setting especially in night.

But even if i use the lowest brightness setting, it is nowhere near e-ink. I tried various LCD screens (ipad, 102 inch LED tv, laptop screens, desktop monitors) and all of them caused eye fatigue even at the lowest brightness settings.

But i think it really depends on the user a lot. I have a friend who can begin and finish a book from his laptop screen which i am pretty sure i will never ever be able to do.

You have to forgive Harry, he frequently equates his experience with technology to other people's, no matter how many times he's told that other people are different from him.

It's just how he is.
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Old 08-26-2011, 04:31 PM   #18
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Originally Posted by reprep View Post
But even if i use the lowest brightness setting, it is nowhere near e-ink. I tried various LCD screens (ipad, 102 inch LED tv, laptop screens, desktop monitors) and all of them caused eye fatigue even at the lowest brightness settings.
Interesting. I wonder why that should be? I'm not doubting your personal experiences; I'm just curious, as a scientist, what the mechanism is that produces eye-strain in those circumstances. Thanks for sharing your experience in this.
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Old 08-26-2011, 06:03 PM   #19
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I'm just curious, as a scientist, what the mechanism is that produces eye-strain in those circumstances.
I can think of three reasons (there may be others), in order of likely relevance:
  1. Backlight: the light is directly projected into one's eyes, not first reflected from the ambiant light. There may be underlying mechanisms, which could better explain the eye-strain:
    • The spectrum of the backlight is not at all the same as the one that is reflected on e-paper.
    • The illuminance do not adjust naturally (it may adjust automatically with a sensor... that's far from perfect).
  2. Refresh-rate: although LCD are far better than CRT in this regard, there are still flickers, even if they aren't consciously visible.
  3. Reflections: caused by glossy screens. Again, may be unconsciously, the eyes (or the brain) have to permanently focus on the correct image (the one on the screen, or the one that is reflected).
Some further readings, e.g., on Wikipedia:
Asthenopia
Electronic paper (see the 2nd §)
Glossy display (see Disadvantages and Adverse health effects)
Matt vs. glossy screens

Last but not least: as an analogy for what concerns the first point, one could think of the difference between television and cinema (or projection screens).
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Old 08-26-2011, 08:17 PM   #20
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Another analogy might be

a) Direct lighthing of the room

b) Reflected lighting from the ceiling of the room

I think most of us will agree that the option b is always easier on eyes even the final brightness of the room is equal.

What i mean is even in a perfect world which we can control the back light in a very fine sensitivity that it exactly matches the surrounding environment, reflected light is still easier on eyes than direct lighting.
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Old 08-26-2011, 10:45 PM   #21
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I've been reading it on an original Nook and it works fine to me. Was thinking of upgrading to an iPad but will wait until the iPad 3 or if a new e-reader that is more suitable to manga is released. If you were able to get the HP touchpad, that might have been the best bet for the price.
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Old 09-02-2011, 02:20 AM   #22
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I would recommend iPad... because it supports manga in color. You can zoom easily. There's many good apps available on it for you to read manga on. It can be used for other stuff besides manga.

Since you do not have the budget for iPad, do consider the HP TouchPad... since it's on sale and dirt cheap now.
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