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  • Abhishek Rawal

    MemberOct 2, 2013

    For 55" 1080p Resolution :
    Diagonal resolution : SQRT (3686400 + 1166400) = SQRT (4852800) = 2202.907
    Display size = 55"
    Hence, Pixel density = 2202.907/55 = 40.052

    For 55" 4K UHD Resolution :
    Diagonal resolution : SQRT (14745600 + 4665600) = SQRT (19411200) = 4405.814
    Display size = 55"
    Hence, Pixel density = 4405.814/55 = 80.105

    Hence, 4K UHD display will have higher PPI than 1080p Full HD.
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  • Anand Tamariya

    MemberOct 3, 2013

    From above calculations, it's clear that 4K is for larger displays. And yet people want FullHD in their mobile phone.
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