[QUOTE=davester;4341401]PWM is not the issue as my eyes have been burning while using monitors for over 20 years. I realize that using eink has many limitations, including watching videos, but the bottom-line question is: For everyday tablet related tasks like reading/replying to email, watching video clips on YouTube, and surfing the web ... would Kaleido-3 color 13.3" eink device give a better overall experience vs. a B&W 13.3" eink device?
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Originally Posted by davester
* B&W screens may be WORSE because text/images may be hard to read/see as Red-text on a Green-background both have a similar greyscale.
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Not really.
Very rare problem as no professionally produced document will have that. Stupidity like pale grey on white or dark grey on black is more common and those work better on mono than colour.
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Originally Posted by davester
* B&W screens may be BETTER because the background is lighter (because of not having the color filter array on top of it), such the contrast is better to view black text oh a white background.
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Yes, always.
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Originally Posted by davester
* B&W screens may be BETTER because it is less likely to need the frontlight because of the better contrast.
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Yes, always. I rarely use the frontlight. If a large screen is unevenly lit then use a decent bedside or desk lamp. The LED yellow stick "filament" is the best LED kind. Halogen and ordinary tungsten a bit power hungry and hot. The CFL vary a lot in colour quality. Colour temperature and Colour rendition (Rendition often poor on cheap LED or Florescent and both poor on the most efficient non-incandescent lamps. Halogen is best colour rendition. LED can totally lack cyan and Florescent/CFL can be too green)
B&W text on colour eink screens using filters (all except the uselessly slow CYM electronic paper panels for signage) are lower resolution than mono eink and fuzzier and lower contrast. The proper eink (not the CYM electronic paper by eink corp) has black, white and 14 greys and thus can't do subpixel addressing as well as LCD. I'm not sure that they even try, but could be wrong?
With LCD above a certain resolution (no sure) the greater grey scale (254 + black + white vs 14) can mean that antialiasing rather than subpixel addressing (which adds blue and red fringes to text) can look better. A matte surface UHD LCD with IPS or better at high resolution and brightness turned down can now be nearly as good as eink, but the current iPad isn't anything like as good as my LG 23″ 4K UHD screen or my slightly larger Samsung 4K UHD. I do have curtains pulled and carefully selected room lighting. Brightness at 11, Contrast 36.