Even the sharpest of TVs and the sharpest of phones starts to look flawed when you look at it from a very close distance. There is another key factor that should be considered when we speak about display sharpness and clarity, though, but it's often left out of the conversation. The latest Quad HD smartphones come (or are expected to arrive) with a pixel density as high as (the seemingly unnecessary) 534ppi! Is it really just new technology for nothing? The third factor: viewing distance Why then screen resolutions continued growing and growing until present-day Quad HD devices?
Samsung Galaxy Note III (5.7-inch, 1080p): 386ppiīy looking at these different phones, we can again see how screens with the same resolution have different pixel densities, and thus different sharpness.īack in the day when Apple unveiled the iPhone 4, various reports suggested that anything above roughly 300ppi is good enough for the human eye to perceive as clear and sharp. Here are the pixel densities of some popular phones since then: Not long after, though, higher resolutions and pixel densities started to appear. The iPhone 4, for instance, featured pixel density of 326 pixels per inch (ppi, but some would also say dots per inch, or dpi). So instead of looking at resolution alone, it makes much more sense to look at a metric like pixel density, calculated using both screen size AND resolution. After all, if you put the same resolution that looks clear on the iPhone on a 50-inch screen it would suddenly start looking not sharp at all. The iPhone 4 was a device with a resolution of 640 x 960 pixels, but resolution alone does not tell us much about the sharpness of the display itself. Let's first start with the iPhone 4, a smartphone that first claimed it comes with a 'Retina' display so sharp that the eye of a regular person no longer sees jagged pixels. Screen resolution and display size: are we there yet? The practical benefit of such a sharp display is that your eye will be able to make out the tiniest of detail in images and videos, as well as read the tiniest of fonts.īut some may ask: wasn't that the whole point of 'Retina' displays way back in 2010? Hadn't we already reached that retina-perfect picture on our devices? We'll answer this question right away. So what is Quad HD all about and what are the benefits it brings? As with any improvement in screen resolution, Quad HD will make smartphone screens clearer, "sharper". 
A few Quad HD smartphones are actually already on sale in China, but it seems that LG's G3 will become the first truly massive smartphone with the new ultra-sharp resolution.
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Quad HD is the common name for the new super-sharp smartphone resolution: after 720p phones' arrival in 2011 and the jump to 1080p smartphones just last year, in 2014, we're already bracing ourselves for the first wave of Quad HD smartphones. The new generation of Quad HD smartphones is coming. You can see the maths behind this at the bottom of the article, or you can just take a look at the GIF also below that visually demonstrates how far away from a phone you need to be start noticing pixelization.
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