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Sony Unveils Smartphone With 4K Screen

An anonymous reader writes: Sony has taken the wraps off its new Xperia Z5 Premium smartphone, which has a 5.5" display that operates at 4k resolution. "The company acknowledged that there was still a limited amount of professional content available in 4K — which provides about four times the number of pixels as 1080p high definition video. But it said the Z5 Premium would upscale videos streamed from YouTube and Netflix to take advantage of the display." Sony's answer to the obvious battery concerns raised by such a pixel-dense (808 ppi) screen was to use a 3,430 mAh battery and memory-on-display technology. The video upscaling can also be turned off to decrease battery drain.

23 of 117 comments (clear)

  1. Does Sony also provide... by xenog · · Score: 5, Funny

    ...high-definition bionic eye implants to be able to see the difference?

    1. Re:Does Sony also provide... by Anonymous Coward · · Score: 2, Informative

      ...high-definition bionic eye implants to be able to see the difference?

      The eye has higher effective resolution than Apple has led us to believe with their "retina" marketing. This article shows how human eye can see 530 ppi resolution in a 20 x 13.3-inch print viewed at 20 inches. http://clarkvision.com/imagedetail/eye-resolution.html
       

    2. Re:Does Sony also provide... by Rei · · Score: 5, Informative

      The maximum physically possible resolution for the human eye to see is 2190 dpi. But that's not an average eye, but rather a flawless eye limited only by the size of the pupil; and viewed from as close as an adult can focus, 4 inches.

      If we downgrade from a perfect eye to an average eye, the resolution drops down to 876 dpi... but still at 4 inches.

      At a more practical 12 inches, this drops to around 300 dpi. Which is why magazines are printed at 300 dpi - it's good enough for most practical circumstances.

      Also note some additional limitations:

        * These sort of resolution figures are based on the ability to distingish bright white lines from bright black lines without them blurring together into gray. The smaller the contrast and the dimmer the light, the less the eye can resolve.
        * The human eye also loses a great deal of ability to make out resolution when objects are moving.
        * Obviously the further away one is from the center of the field of view, the lower the resolution - with a rather fast dropoff.

      Yes, 808 dpi is complete and total overkill, unless you've got superb eyes and are in the habit of holding your phone as close to them as you can focus while looking at high contrast stationary images.

      --
      Stale pastry is hollow succor to one who is bereft of ostrich.
    3. Re:Does Sony also provide... by lexman098 · · Score: 3

      Yes, 808 dpi is complete and total overkill, unless you've got superb eyes and are in the habit of holding your phone as close to them as you can focus while looking at high contrast stationary images.

      You mean like when you've got the phone strapped to your head in VR mode?

    4. Re:Does Sony also provide... by Rei · · Score: 3, Informative

      20/20 vision is defined by the ability to resolve 1 arc minute. For example, the "E" on an eye doctor's chart on the 20/20 vision line is 5 arc minutes tall, as reading it takes the ability to break it down into five vertical glyphs and distingish between them. That page is based on the premise of a person being able to resolve 0,3 arc minutes.

      Problem.

      Also, see above. The human eye has a lot more limitations than just a simple single angular resolution figure can express. I even forgot to list one: time. Not only does motion greatly limit one's resolution ability, but even on a stationary image, the person has to be able to focus and take time in order to get even "normal" levels of visual acuity.

      --
      Stale pastry is hollow succor to one who is bereft of ostrich.
    5. Re: Does Sony also provide... by asc99c · · Score: 2

      The 20/20 vision line is a few from the bottom on the eye chart, it's just the 'normal' vision line. It's been a few years since I've done an eye test but last time I could fairly easily read every line on the chart, which is substantially better than 20/20 vision. Even so, I remember my vision being significantly more acute when I was younger! I can definitely imagine plenty of people being able to see and use this higher resolution.

  2. Good work, SONY by Anonymous Coward · · Score: 5, Insightful

    Fix bugs? Address users' complaints? Release updates within the schedule *you* announce? Maybe add basic functionality to your 'premium' music playing software, functionality that media players have had for well over a decade now?

    Naaaah, fuck that, let's put a 4k screen on a 5.5" phone! Yeah!

  3. 3D... by MadCow42 · · Score: 4, Interesting

    That type of resolution lends itself very well to doing things like lenticular 3-D. I know people often don't like lenticular, but that's usually because it's done so poorly so often. Well-done lenticular is amazing to see and is not a strain on the eyes. If glass lenticules were built into the display itself, and were appropriately sized and spaced, it could be impressive.

    There are other interesting technologies too that could be done, such as barrier-screen - that could be implemented by LCD over top of the display - which would be less intrusive and could be turned on/off.

    I write software for these applications - I would drool over a screen that had 808ppi!

    --
    I used to have a sig, but I set it free and it never came back.
  4. Better screen for Project Morpheus by Anonymous Coward · · Score: 2, Interesting

    They say 8k is the ultimate target for a VR headset.

  5. Screen magnifiers by hawguy · · Score: 2

    Sounds like it's time to bring back the 1940's era TV screen magnifiers so users can take advantage of all of those pixels.

  6. Re:If you hold it 1.3 mm in from of your face by gstoddart · · Score: 2

    I'm waiting for the technology to completely fail, and then they'll announce the next thing.

    The people making it are all going "yarg, teh 4K". The average consumer doesn't give a crap.

    Having rode out the first decade of HD waiting until it stopped being a moving target on $10K TVs no sane person was going to buy ... seen the format wars to move on from DVD ... and having see a couple of early adopters discover their TV could no longer display HD because of the copy protection stuff ... I can tell you the average consumer doesn't care about this and doesn't wish to get sucked into another format war.

    The people who care about this would buy anything if you claimed it was new and better.

    The industry is drooling at selling us new TVs, and DVD players, and amps, and monitors, and phones every few years because they've got the new hotness.

    But people didn't care about 3D for the most part, and still don't care about 4K displays. Consumer demand isn't driving this, marketing is.

    My 55" HDTV (without 3D and with no internet connection) is all I want for now. My BluRay player is fine. My amp does what I need it to. The 2x24" 1080p screens on my desk are just fine thanks.

    If someone thinks I'm going to splash out on this stuff every few years because they've started selling it ... they're morons. I mean, come on, 4K on a phone? And this would exhaust your data plan in, what, 30 minutes?

    I have no doubt people will buy this stuff. But I also know they'll likely be wasting their money for little added benefit or to have bragging rights. Pretty much everybody else will view this with complete indifference.

    --
    Lost at C:>. Found at C.
  7. Pixel Whores by Bugler412 · · Score: 4, Insightful

    Same as the MHz wars of yore, or megapixel wars in digitial cameras. Meaningless (beyond a certain usability point) spec chasing by uninformed or hoodwinked general consumers. What possible function other than driving phone sales can 4k on a 5.5" screen have?!

    1. Re:Pixel Whores by TeknoHog · · Score: 2

      Your false parallel is showing. You can always find something more compute-intensive, as much as necessary for any increase in compute-power to make a clear difference.

      The gist of "MHz wars" was that smarter, lower-MHz CPUs were actually better at compute-intensive tasks, whereas something like Pentium 4 could only show higher numbers of MHz and watts.

      To me, the real issue is that some of the best technology ends up in dumb consumer devices like phones, while people who write code and perform heavy scientific computing make do with old-school hardware. For example, try finding a laptop with similar efficiency and density of computing power and memory as phones. I'm struggling to understand what people actually do with their 4..8 cores and gigs and gigs of RAM on phones where the OS/UI doesn't let you do any actual computing. It's just perls before hogs.

      --
      Escher was the first MC and Giger invented the HR department.
  8. Re:Absolutely ridiculous and unnecessary. by Merk42 · · Score: 2

    Um excuse me, of course I can resolve that kind of resolution, because my sight is so much better than the ~average~ human. *Mashes phone against eye socket* See??

  9. Upscaling is BS by Pro923 · · Score: 2

    Back in 2009 I bought a beautiful 50" Panasonic 1080p plasma. I (still to this day) absolutely love that TV and the images that it renders. When I used a BluRay for the first time (Actually the only way to fully use the 1080p, as Comcast isn't 1080p), I realized that by standing a couple feet away from the TV I could see things that I wouldn't be able to see at a normal distance. 4k must be amazing - it's like a microscope, as you can see detail that you wouldn't be able to see with the naked eye if you were standing where the camera was.

    About Upscaling - This is the biggest load of crap ever. You can NOT create detail beyond that which you started with. An upscaled picture, displayed at 4k, that was captured with a 1080p camera can't possibly be any more accurate than the same picture displayed on a 1080p TV. Of course, the masses don't understand this. This seems to be the "MO" of most technology these days, since non-tech-savvy people are using a lot of tech gadgets - you can say meaningless things that sound "good", and people will accept them as "good" since they don't know what the hell they've really got.

    1. Re:Upscaling is BS by fnj · · Score: 2

      Actually, proper interpolative upscaling reduces spatial quantization "jaggies", which means you get a more accurate representation of the original real-world view. Yeah, bog-stupid upscaling by just duplicating every pixel 2 times horizontally and 2 times vertically does not do anything whatsoever for resolution.

    2. Re:Upscaling is BS by fnj · · Score: 4, Informative

      You do understand that 1080i has precisely the same spatial resolution as 1080p, right? There is no field fade (whatsoever) on an LCD, as there is on CRT. And the temporal resolution depends on the respective frame rates. 1080i is 60 fps in the US and other NTSC-legacy areas, and 50 in Europe and other PAL-legacy areas.

      1080p may be either 24, 30, or 60 fps in the US, and 25 or 50 in Europe. The lower figures are the norm for film-derived material, since film has 24 fps. The lower figures give you in fact a LOWER temporal resolution for 1080p than for 1080i. The higher figures give you the SAME temporal resolution for 1080p as for 1080i. The difference is that in 1080i, only 1/2 the 2,073,600 pixels change every 1/fps seconds, and in 1080p all of the 2,073,600 pixels change every 1/fps seconds.[*]

      In scenes with no motion, there is no difference in image quality whatsoever. None. 1080p and 1080i give identical images. Only in scenes with significantly rapid motion does 1080i introduce noticeable artifacts that aren't there with 1080p.

      [*] The actual situation is modified by various motion-smoothing video-processing algorithms employed in any good-quality interlaced display.

  10. 8K/eye by LionKimbro · · Score: 2

    "To get to the point where you can't see pixels, I think some of the speculation is you need about 8K per eye in our current field of view [for the Rift]." -- Palmer Luckey, the founder and creator of the Oculus Rift

  11. I got a 4K TV Yesterday by jeffmflanagan · · Score: 4, Informative

    I did some side-by-side comparisons between a year-old Samsung 1080p set, and a new Samsung 4K set.

    NetFlix 4K looks a lot better than their 1080p service, but just like the 1080p service, the video is over-compressed, so fine detail is missing. YouTube 4K videos look amazing.

    1. Re:I got a 4K TV Yesterday by Pro923 · · Score: 2

      Sounds like how they took the computer monitor screens and used "1080p" hype to reduce the average resolution of a screen from 1600x1200 to 1600x1080. Whenever I go looking for a monitor now, I spend lots of time to find the ones with 1200 vertical pixels versus 1080.

  12. Re:If you hold it 1.3 mm in from of your face by rjstanford · · Score: 2

    The 2x24" 1080p screens on my desk are just fine thanks.

    In fairness, there's a pretty spectacular improvement in moving to a "retina" class display on your using-it-all-the-time monitor. I can see no rational reason for having a higher resolution on my phone than I do on my 27" computer monitor though, even if I do hold it half the distance away.

    --
    You're special forces then? That's great! I just love your olympics!
  13. Optional accessory... by erp_consultant · · Score: 3, Insightful

    To go along with the 4K display Sony will be offering an optional 30lb. battery (with an available backpack). A Sony spokesperson, when asked to comment on this, confirmed that the optional battery should allow users an entire day of phone use without the need for a recharge.

    "These things are flying off the shelf" according to I.P. Nightly of Sony. "Our customers are demanding 4K screens for their phones and, by gosh, we have delivered in a big, big way!" claims Nightly.

    Stay tuned for more news as it develops....

  14. Wrong aspect ratio... by Anonymous Coward · · Score: 2, Informative

    Not that it has stopped some, but a 16:9 display in a phone is not optimal for VR. It is difficult to drive such a display while doing something interesting, and a phone just doesn't have the CPU to do it locally, or the bandwidth to do it remotely.

    An wired 8:3 would display would be a much better fit, as it matches the human visual field more closely, and wouldn't require batteries or other useless hardware.