Phones 4k Note 5 @ 743ppi?

Discussion in 'Alternatives to iOS and iOS Devices' started by spriter, Nov 7, 2014.

  1. spriter, Nov 7, 2014
    Last edited: Nov 8, 2014
  2. mi7chy macrumors 601


    Oct 24, 2014
    That's nuts. I just want 4K output to an OLED TV but not necessarily 4K phone display but if they can accomplish it without affecting performance, battery life and cost then all the power to them.
  3. jrswizzle macrumors 603


    Aug 23, 2012
    McKinney, TX
    That bad boy better come with a massive battery.......

    Seems like overkill is an understatement. I can't imagine the noticeable difference between this and a 2k display at that size would be worth it.

    I'm all for Samsung going for it - but if I see any threads after the Note 5 is released (if this turns out to be true) telling me how pathetic my 1080p or 2k iPhone 6S+ display is, I'll flip on them.

    Again, all for it but complete overkill IMO.
  4. spriter thread starter macrumors 65816


    May 13, 2004
    Yup, can't really see a compelling reason other than to spec boast.

    The battery and GPU will need to be good to power and push those pixels around. Then there's more storage needs as apps get larger and people record in 4K.

    If not Samsung, somebody will likely do it. It's only a matter of time.
  5. alex2792 macrumors 6502a

    Jun 13, 2009
    Possible, but at some point it makes no sense to keep increasing resolution on a 5-6in screen. In pretty sure that 99.99% will never notice the difference between 2k and 4k on a phone.
  6. MRU Suspended


    Aug 23, 2005
    More fool them. Tangible benefit to consumer resolution wise = none. If you can't see the pixels now - what are you getting ? Tangible negatives to heat, performance, memory, processor etc... far greater.
  7. Shanghaichica macrumors G3


    Apr 8, 2013
    If it impacts on the performance of the phone a la G3 then they should not just for bragging rights. However if they can do it without it impacting on performance then why not.
  8. MRU Suspended


    Aug 23, 2005
    There will always be an impact on performance however. Yes they may be able to 'counter' that with faster processor, more memory & bigger battery - but the consumer would likely benefit more with 1. better software optimisation, 2. increased outdoor readability 3. more battery life - than just bumping up specs and to support the newest thing on the block. Samsung need to get out of that mentality - (throw everything at it but the kitchen sink) and try to 1up LG as clearly as a marketing strategy it is waining impact on consumers.
  9. spinedoc77 macrumors G3


    Jun 11, 2009
    Note 4 has a higher resolution but gets better battery life than the note 3. I think the battery size is the same or slightly larger. I don't think its a given that a 4k display would offer poor battery life, we don't know what technology improvements will be made in a year.
  10. mi7chy macrumors 601


    Oct 24, 2014
    What's even more amazing is the Note 4 display is even brighter than my Note 3. Just too bad they didn't offer a 6" option.
  11. ucfgrad93 macrumors P6


    Aug 17, 2007
    Agreed. I don't see this happening though.
  12. tbayrgs macrumors 603


    Jul 5, 2009
    But how much better would it be at a lower resolution? There are diminishing returns with these increased screen resolution. I'm not arguing that the Note 4 display resolution is unnecessarily high but 4K on a 5.5-6" device is just unnecessary and wasteful. It will drain resources that would better be allocated to areas of the phone is greater need of improvement.
  13. Skylitfly macrumors 6502a

    May 3, 2014
    Would be extremely stupid.

    720p is more than enough at 4,7" to 5" range. And 1080p is enough at 5" to 6" range. No need for overkill.
  14. spinedoc77 macrumors G3


    Jun 11, 2009
    I don't disagree with you at all, but how much better do you need the battery? With heavy use, lots of phone calls and web browsing my Note 4 easily lasts me 2 days. With that said I'm certainly not advocating 4k screens, I think there is a LOT of other stuff they should be working on. I'll take a foldable crappy resolution display any day of the week over a 4k one.
  15. Sevanw, Nov 8, 2014
    Last edited: Nov 8, 2014

    Sevanw macrumors 65816


    Sep 13, 2014
    I'm all for it. New technologies seed newer technologies. Get out of the way if you're not getting on board. Let's not forget how many were against 720P and 1080P. Resistance is futile.
  16. Zwhaler macrumors 604


    Jun 10, 2006
    Except Samsung uses diamond subpixel arrangement, which frankly looked really bad at 1080p on the Note 3. Note 4 is much better but 4K would be even better despite the diamond subpixels.
  17. TechGod macrumors 68040


    Feb 25, 2014
    New Zealand
    Disagree, I can see pixels when I have my Nexus 4 up close, anything over 1080P is overkill.
  18. Twixt macrumors 6502

    May 30, 2012
    definitely true.
    Note 4 ' screen is so beautiful that it is a pity it is not bigger!
  19. Septembersrain Contributor


    Dec 14, 2013
    If they really do pull off a 4k display with decent battery life and performance, my curiosity would push me forward. I've got the Note 3 now, the Note 4 just didn't call to me.
  20. theapplefanboyj macrumors 6502a

    Mar 1, 2014
    OPPO had one of the first 1080p phones, and then one of the first Quad-HD phones. Maybe them?
  21. Atomic Walrus macrumors 6502a

    Sep 24, 2012
    This is happening purely for VR. No one over 10 can hold the display close enough to their eyes to see a benefit, but the VR setup uses lenses to allow you to see the screen clearly only inches from your eyes. Personally I don't plan to strap my phone into a hilarious face box, but YMMV (if I were interested in VR I'd go to a full Occulus Rift on a PC).

    It'll be pentile (err, diamond, but the point is it's missing subpixels). So you'll have to render at 4K, but the display will only be slightly higher density than a full RGB 2560x1440 panel. Really, manufacturers shouldn't be allowed to advertise pentile displays as whatever resolution they emulate since their actual pixel density is much lower.

    They'd get much, MUCH better results going to a full RGB 2560x1440. Significantly higher perceived resolution with no hit on performance vs Note 4. Of course "full RGB 2560x1440" is not an impressive spec if you advertised that resolution last year. In fact it's a negative advertising point because it broadcasts the fact that you previously used a sub-2560x1440 panel and called it 2560x1440.

    I'm really impressed with Samsung's OLED panel tech in general, but not so much with their spec-focused use of pentile.
  22. skratch77 macrumors 65816

    Mar 20, 2013
    Can you tell us what full rgb means?

    There is rgb,rgb s stripe ,rgbw,rgbw square and the new rgb diamond

    Samsung has exactly the amount of pixels per inch they say they do.some type use 2 sub pixels some use 3 and some have 3 in an s shape and some have 3 in a stripe shape and some have them in a square shape.

    Samsung is using a diamond pattern and with its high density it makes out to be the most accurate display ever made.

    Attached Files:

  23. skratch77 macrumors 65816

    Mar 20, 2013
    And here is diamond!

    Attached Files:

  24. Bahroo macrumors 68000

    Jul 21, 2012
    red and blue sub pixels on the Note 4 are only 366 PPI, while white and green subpixels are 511 PPI.

    Its the effect of Pentile
  25. Atomic Walrus macrumors 6502a

    Sep 24, 2012
    Yeah, nothing confusing about it. "Full RGB" means that each pixel gets its own R,G,B subpixels instead of sharing. With any shared layout (diamonds or not) you have fewer red and blue subpixels, so you're only really getting the advertised resolution on green. Considering the replies above their marketing seems to be working (holy crap, diamonds).

    The easiest way to see this effect is to compare aliasing on a Note 3 and an iP6+ (or another full stripe 1080P panel of similar size). They advertise the same resolution, but the full stripe 1080P panel is much sharper in practice unless you only compare green.

    Basically an RGB 1080P 5.7" screen is, what, 388 ppi? The effective ppi of the Note 4 screen is (366+366+511)/3 = 414. In practice this number is just an estimate since you get the full 511 if you have all green and the worst case (366) if you have all red/blue.

    In terms of reading text this works out pretty well. In that case you're talking about black on white and the green pixels lighting up to 100% around the black text more or less means the text does appear at 511 ppi.

    In terms of rendering for games or displaying images it's more of a mixed bag and in that case the advantage over 1080P RGB is limited.

    So I stand by my original statement: Samsung would get much better results going to full RGB 2560x1440 and saving some GPU power vs doing pentile 4K. Their marketing department wants to see new numbers so it unfortunately won't happen.


    Just want to reiterate that the Note 4 display looks amazing, no questions. It's just that rendering at 2560x1440 for pentile is wasteful on the GPU end (rendering doesn't care about the subpixel layout).

Share This Page