Quote:
Originally Posted by elcreative
True but they do care about the intensity and contrast involved... or perhaps I and others imagine our incapacitating migraine attacks when using an a backlit LCD for a bit too long but never get similar effects from e-ink over equal or longer periods of time... a photon is a photon (but they can vary in energy according to position in spectrum, if you really want to be picky) but 10 photons is more light than one photon... also basic physics and LCD screens do not usually operate at ambient light levels unlike e-ink which, by default, uses ambient light reflectively... that's the difference between them not source of photons and those who have problems/preferences do appreciate this...
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I completely agree - that's why I specifically said "at the same level as the ambient light in the room". The problem is that many LCD devices either don't allow you to adjust the brightness, or else the user sets the brightness too high. If you set the brightness correctly, there really is no physical difference between the LCD and the eInk screen as far as your eye is concerned.