1. kfh227's Avatar
    This question sucks. Often, people say more than 300 ppi doesn't matter. But how far away is the screen?

    So, let's collect info.

    First. If you don't have 20/20 vision, pixel density matters. Let's assume people all have 20/20 vision due to corrective technology (glasses). Let's find actual research that can tell us what pixel density at 1 foot away yields a result where adding more pixels does nothing.
    07-06-13 01:42 AM
  2. kfh227's Avatar
    Interesting:
    JavaScript Display Calculator

    This makes me think that the Q10 display could be improved upon. 720x720 at 12" on a 3.1" screen is less than 300 dpi. So, it could be better.

    So, I think we could go higher res. But 1000x1000 would be better. 1080x1080 is a 1.5x multiplication factor. The next Q phone should go there! We need to go 1080p and we need to go HD1080. Sorry, but there is actual; reason to do this. People don't have 20/20 vision though. BBRY needs to make the 1080p transition. if not, they are **** ed.

    Of course, if you hold the phone say ... 15" from your face ... it doesn't matter assuming 20/20 vision.

    Blackberry needs to get over it. Pixel density matters because:
    1) It potentially does make a real world differnce
    2) Marketing. You can't have 90% of phones on the market in 6 months time be 1080p and you come out with a lesser flagship. IT IS A DUMB IDEA!

    God, I hate investing. Blackberry needs to realize that 1080p is REQUIRED! It is a god damned requirement.

    I hate drinking. I think brashly. But in some ways it is easier to make decisions. If the A10 is not 1080p, TH needs to go to work on Monday and say that it has to be and that it will not be released unless it is!

    I own the god damned company. I am not saying I want it this way. IT MUST BE THIS WAY! TH, you work for me. get over it and what your BoD says. You need to realize that this is not Doritos. This is smartphones. have top specs or suffer the fate of not being top notch. realize that in two years, all Androids will be calculators. Samsung will be dead in smartphones. The competition will catch up. The spec war can't go on forever. BBRY needs differentiation and they have that. But for the love of god, don't sell Cathode ray Tubes when 1080p LCDs are commonplace. You'll loose to cheap LCDs at Wal-mart no matter what other tech surrounds your TV.
    07-06-13 01:49 AM
  3. anon62607's Avatar
    http://www.swift.ac.uk/about/files/vision.pdf

    This isn't the source research but quotes 28 seconds of arc, which would be about 0.001629 inches at 1 foot, or 613 pixels per inch.
    kfh227 and MarsupilamiX like this.
    07-06-13 01:51 AM
  4. kfh227's Avatar
    http://www.swift.ac.uk/about/files/vision.pdf

    This isn't the source research but quotes 28 seconds of arc, which would be about 0.001629 inches at 1 foot, or 613 pixels per inch.
    That's unexpected. Thanks for the source!
    07-06-13 02:01 AM
  5. kfh227's Avatar
    Found discussion on dpi of GS4. Are average people this stupid? You could make a 5 million dpi screen and people would think it is better than 1 million dpi.

    OK, found it. The GS4 is 440 dpi on a 5.0" screen.

    Personally, I hold my Z10 t more than a foot away. Probably 15".

    What is sad, is that it looks like more than 1080p on a 5" screen is warranted. wow.
    07-06-13 02:05 AM
  6. --TommesJay--'s Avatar
    I did some research on this a while ago.

    20/20 vision represents 1.0 arcminutes. Then there's perfect vision, which represents 0.6 arcminutes. Many folks out there pretend that everyone has perfect vision and base their math on it, which is just dumb. Most of us have 20/20, if not even worse eyes.

    So retina resolutions for 20/20 vision depending on distance:

    15" - 229.2 PPI
    12" - 286.5 PPI
    10" - 343.8 PPI
    8" - 429.8 PPI
    6" - 573.0 PPI
    4" - 859.5 PPI
    2" - 1,719.0 PPI

    Retina resolutions for perfect vision:

    15" - 382.0
    12" - 477.5
    10" - 573.0
    8" - 716.3
    6" - 955.0
    4" - 1,432.5
    2" - 2,865.0


    That's it. So if you have 'normal' eyesight and don't go nearer than 10", the Z10 and also the Q10 will be fine.


    Posted via CB10
    Mecca EL and mundo472 like this.
    07-06-13 07:28 AM
  7. kfh227's Avatar
    I thought 20/20 vision was perfect?

    Posted via CB10
    07-08-13 10:04 PM
  8. --TommesJay--'s Avatar
    I thought 20/20 vision was perfect?

    Posted via CB10
    Nope.

    20/20 vision is considered as 'normal acuity', it's scoring 100% at a visual acuity test at the doctor. This represents approx. 1.0 arcminutes. This is the acuity the human eye is 'normally' capable of, on average.

    'Perfect vision' instead is 20/12 vision. That means the person can read the chart from 20 feet distance like a normal person would on 12 feet distance. This is well over 100% acuity and represents 0.6 arcminutes.

    Now guess what portion of the population has perfect vision (or just significantly better than normal vision), especially over 25 of age

    Posted via CB10
    07-08-13 11:43 PM
  9. Bluenoser63's Avatar
    I did some research on this a while ago.

    20/20 vision represents 1.0 arcminutes. Then there's perfect vision, which represents 0.6 arcminutes. Many folks out there pretend that everyone has perfect vision and base their math on it, which is just dumb. Most of us have 20/20, if not even worse eyes.

    So retina resolutions for 20/20 vision depending on distance:

    15" - 229.2 PPI
    12" - 286.5 PPI
    10" - 343.8 PPI
    8" - 429.8 PPI
    6" - 573.0 PPI
    4" - 859.5 PPI
    2" - 1,719.0 PPI

    Retina resolutions for perfect vision:

    15" - 382.0
    12" - 477.5
    10" - 573.0
    8" - 716.3
    6" - 955.0
    4" - 1,432.5
    2" - 2,865.0


    That's it. So if you have 'normal' eyesight and don't go nearer than 10", the Z10 and also the Q10 will be fine.


    Posted via CB10
    And what you have proven is that 1080p is a waste for a small size screen.
    07-09-13 07:39 AM
  10. anon62607's Avatar
    Nope.

    20/20 vision is considered as 'normal acuity', it's scoring 100% at a visual acuity test at the doctor. This represents approx. 1.0 arcminutes. This is the acuity the human eye is 'normally' capable of, on average.

    'Perfect vision' instead is 20/12 vision. That means the person can read the chart from 20 feet distance like a normal person would on 12 feet distance. This is well over 100% acuity and represents 0.6 arcminutes.

    Now guess what portion of the population has perfect vision (or just significantly better than normal vision), especially over 25 of age

    Posted via CB10
    Examples of humans with 20/8 vision have been found, and around 20/4 is the theoretical maximum if to take into consideration only the fovea and disregard optical properties of the eye.

    Also the tests usually are in such a way that the subject is able to differentiate a full contrast non moving set of lines, when the lines are moving you get somewhat better perceived resolution.

    I think 1080p is useful on 4.5 inch or so displays. 440ppi is much nicer to read fine text on vs 330ppi and easily noticeable (droid DNA vs iPhone 5)


    Sent from my iPad using Tapatalk HD
    07-10-13 03:52 AM
  11. Gatmyer's Avatar
    An example of 20/4 vision

    07-10-13 02:43 PM
  12. szlevi's Avatar
    And what you have proven is that 1080p is a waste for a small size screen.
    This downright ******** crap never ceases to amaze me... do you people even understand the basics of screen real estate vs resolution vs screen size?
    07-11-13 11:53 PM

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