Gadgetory

notes up guys mkbhd here and today we're gonna be talking about pixel densities everything you could possibly want to know about pixel densities in the last video in case you missed it I mentioned that the iPad 3 might possibly have a Retina display and a lot of you guys were thinking that that's a little bit unnecessary I mean just a tablet why would it need a Retina display things like that so today I hope to be able to address that let's go ahead and get started with this video well to start individual pixels on a display contain a certain number of sub pixels for each color and there are different display technologies like pentile displays that have less sub pixels per pixel and therefore tend to look a little bit worse when displaying the color that they're missing but for the sake of simplicity let's assume that all displays are made up with pixels with red green and blue sub pixels now when we're talking about resolution we tend to refer to it in its simplest form the X by y form where X is the number of pixels in the horizontal direction and Y is the number of pixels in the vertical direction a full HD display for example would measure 1920 pixels across by 1080 pixels down 1920 by 1080 so what I want to talk about pixel density we need to measure the number of pixels on the display and divide it by the size of the display the area so here in America we use pixels per inch as silly as inches are so we multiply the horizontal resolution by the vertical resolution to get the total number of pixels on the display then multiply the horizontal size by the vertical size of the display to get the total area in square inches divide the two numbers and that's how I would calculate pixel density so Retina display a term done by Apple is really any display with a pixel density so high that the retina of the human eye cannot detect individual pixels from a typical viewing distance the iPhone has a resolution of 960 by 540 on a three-and-a-half inch screen giving it a pixel density of 326 pixels per inch you're typically using an iPhone less than 2 feet away from your eyeball so again the higher pixel density the better when it's that close to your face now just about any phone display with a pixel density of around 250 PPI or higher will look excellent from such a close range but not every phone has such a high pixel density as you can see here there are quite a few that come nowhere near that now moving on to tablets now when you're using a tablet using it from a little bit further away so pixels can be a bit bigger before your retinic can detect them people use a tablet from roughly three feet away from their eyes so the average pixel density for tablets drops off a bit the iPad 2 comes in at 132 PPI and the Motorola Xoom and Asus Transformer Prime at 150 you can occasionally see pixels at this density but usually not but this is why people are looking forward to a high resolution iPad 3 and then we move on to computer displays which is stuck around the same resolution for years the difficult 24 inch monitor has a resolution of 1920 by 1080 which gives it a pixel density of just 91 PPI and it doesn't stop there take a lower-end 19 inch monitor with a resolution of 1280 by 1024 86 PPI and while you may be inclined to believe that your precious Apple Thunderbolt displays superior and clarity seems very sharp it's really not this 27 inch monitor comes in at 2560 by 1440 giving it a pixel density of 109 putting it right in line with other displays in that size and that price range of course we use desktop monitors from a little bit further away and maybe 4 feet from our eyes so we typically don't notice so much lower pixel density then of course there are TVs now we sit much further away from TVs so pixel density drops off again here a 42 inch 1080p TV has a pixel density of just 52 PPI I'm sure when you were young you looked up at the TV up close and notice the red green and blue dots that made up the picture yeah you were looking at sub pixels there so there have been rumors about a Retina Display MacBook Pro but I wouldn't put any money on it the real bet here is in high resolution tablets next in fact the Asus Transformer Prime TF 700 T tablet has already been announced and will be available later this year with a 1920 by 1200 display and Samsung has rumored 11 inch tablet in the works with a resolution of 2560 by 1600 the same resolution we see on a lot of 30-inch monitors today the iPad 3 like I mentioned in my last video is rumored to have a resolution of 2048 by 1536 on that 10.1 inch display bringing it to a pixel density of 528 PPI overkill probably but will it be beautiful absolutely so this has been an MTB HD video thank you for watching if you enjoyed it please give it a thumbs up that really does help out a lot and I'll talk to you guys in the next video thanks for watching peace you