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resolution is often the only spec quoted when referring to the finess of a

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digital image but there's actually much more to it than that a 5in 1280x 720

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image will look sharp and crisp on your phone but if you projected a 720p image

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in a movie theater it would look horrible so that my friends is where

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pixel density comes in a measure of the resolution that also accounts for the

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size of the screen PPI has become the most common way to denote pixel density

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although pixels per centimeter or PPC

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can also be used to calculate PPI simply

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measure 1 inch diagonally on the screen then draw a line diagonally through them

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and find out how many pixels it intersects with so I heard higher pixel

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density is always better is that right

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well sort of the geek andme wants to say yes bring it on more but in reality it

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requires Advanced display technology and more processing power so it's not always

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practical from a cost and Manufacturing perspective to keep driving up pixel

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density with older devices there was tons of room for improvement diagonal

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lines looked like this and circles even had an ugly staircase effect but this is

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improved in recent years and we've even begun to see displays where the eye

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cannot even pick out the individual pixels on the display once that point is

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reached there's not much benefit to continuing to add cost and complexity to

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manufacturing because most people won't notice anyway Apple's branding for this

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good enough density concept is Retina but to determine if a display is Retina

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there's one last thing to consider how far away are you going to be from the

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display is this rea.com has a handy little tool for this and according to

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their calculator a 55 in 1080 PTV will

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have the same perceived pixel density from 7 ft away as this 4.7 in 1080P

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phone does from 7 in away but there's more to a great display than how many

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pixels it has of course contrast color

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accuracy and pixel response times impact the viewing experience tremendously and

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different display types can even affect other things like the battery life of

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your device improving power efficiency panel Technologies also play a large

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role for example while both the Samsung Galaxy S4 and the HTC1 have 1080p

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displays the S4 uses a pentile matrix

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Amo LED display that has fewer dots on

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it overall while the one uses a more standard LCD display with RGB sub pixels

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click the link in the video description to learn more about this speaking of

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links in the video description our sponsor for this episode is audible.com

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head over to audible.com tequ to sign up and get a free Audi book now I read the

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first one a few years ago but I was browsing customer favorites today and

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saw that there's a prequel to Pride and Prejudice and Zombies by Jane Austin and

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Steve Hawkin Smith you might wonder how a book released in 2010 could have been

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co-authored by Jane Austin to which I would reply the zombies anyway guys

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audible.com tewi for your free audiobook today there's tons of selection if you

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want something fun and light to listen to like Pride and Prejudice and Zombies

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or for something more serious as well don't forget to subscribe to Tech

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quickie for more fastest possibles like this like this video and leave a comment

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for us if you have any feedback