Anyone have the warmer iPad2 screens?

Discussion in 'iPad' started by xelaetaks, Jun 17, 2011.

  1. xelaetaks, Jun 17, 2011
    Last edited: Jun 17, 2011

    xelaetaks macrumors member

    Feb 16, 2011
    I do and its not so bad. My only complaint is that it doesnt go too bright altho its not a problem indoors, i wish there was a way to kick it up a notch tho but i also dont want to exchange it cause i have very minor light bleed so definetely wouldn't want any of the screens with backlight bleeds. :apple:
  2. bobright macrumors 601

    Jun 29, 2010
    I have a warm one as well, minor light bleed not much clouding.

    Blacks IMO seem more black while colors are more vivid.
  3. reactions macrumors 6502


    Jul 24, 2009
    when did the warmer screens happen because to me it looks like a tinge of yellow over white
  4. interwebs macrumors member

    May 26, 2011
    From what I can tell the variations are both due to different manufacturers AND sample variability within a single manufacturer. White LEDs are commonly produced by taking a blue LED and coating it with phosphor, such as a yellow phosphor. There is some variability in this process especially in the high yield low cost area. This seems to account for variability amongst screens which appear to me to come from the same manufacturer but range from cool to quite yellow. This variability in manufacturing also imposes unequal luminosity from issues such as heat loss at varying degrees and variability in the LEDs used. So, in sum, I have seen some dim, yellowish screens that look awful, cool screens with uneven backlighting but some parts bright, and a mix of those things. The one I have now is kind of neutral and very even backlighting and is pretty bright.

    There is another variant I've seen that is consistently bright and a very neutral white with great color but a characteristic falloff in luminosity on the left longwise edge. It's identical in all four examples I've seen. Weird. Probably a different manufacturer. Aside from that issue, IMO these are the best looking screens. They do tend to have some bleed but the ones I've seen it wasn't severe.

    I am not personally a fan of the cool temp screens as the color isn't accurate. There are bright neutral-to-warmish screens out there. I think the yellow ones may be cases where there the phosphor costing was poorly applied but I don't know.
  5. RobNor macrumors 6502

    May 29, 2010
    Interwebs how uneven is the backlighting on your iPad?
  6. Aspasia macrumors 65816

    Jun 9, 2011
    Halfway between the Equator and North Pole
    I've read that the warmer screens are produced by Samsung, and that the change was made after the earthquake devastated Japan, which had supplied the original screens.

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