Gadgetory

what's up guys david here for foam ball fan in this video i'm gonna try to help answer a question that lobby has been asking that's how much of a difference or how much better is having 1080p resolution on a smart phone like on the new galaxy s4 for example compared to a 720p resolution like on this predecessor here and the galaxy s3 in other words is having a full HD screen really all that it's made out to be or is it just another gimmick that manufacturers use to produce some kind of marketing hype well let's go ahead and find out so on a phone like the galaxy s4 with its full HD 1920 by 1080 resolution packed into a display size of less than 5 inches you get a PPI which stands for pixels per inch or dots per inch of 441 in contrast the 1280 by 720 resolution on the galaxy s3 is 4 point 8 inch screen gives you a ppi of just 306 now when it comes to PPI or pixel density the main thing to remember is that the higher the PPI is the more detailed it will technically be on the screen at least inch per inch the next thing to remember is that PPI is based on two main factors one of course is the resolution or the total number of pixels and the second is the size of the screen that's actually housing those pixels so the bigger the screen is the less pixel density will be if resolution stays the same and the opposite is true with a smaller screen having a higher pixel density with the same resolution now considering through these two phones in particular have similar screen sizes but have a big difference in total number of pixels you don't really have to be a mathematician to know that having 1080p resolution is gonna give you a significantly higher pixel density and therefore better inch per inch quality than 720p just take one look under the microscope and you can clearly see the more than 130 PPI difference between these two screens this is what regular text looks like on the 720p galaxy s3 here's what that same text looks like on the 1080p Galaxy s4 but there's this text right so here's a picture on the 1080p galaxy s4 okay you ready here's what that same picture looks like on the 720p galaxy s3 yeah pretty big difference right I mean when you look at them side-by-side there's really no comparison text and photos just look so much sharper and so much more detailed on a 1080p display so is this proof enough that 1080p is indeed significantly better and it's not all just a little marketing to sales new phones well yes and no you see the truth is it's not that simple and that's because for one we don't look at our phones through microscope we use our eyes and - there's a point in pixel density are going to be somewhere between 250 and 350 PPI that most experts like display mates dr. Raymond sanera say additional pixels don't necessarily translate into better quality with ordinary viewing as in anything above this range those eyes views look at our screens aren't really able to appreciate in fact this is why Apple calls the display on the iPhone a Retina display since this pixel density still falls within this Retina range despite having a lower resolution than even 720p thanks to its smaller display size now look I'd heard this argument before even touch the tiny people on a person and it made perfect sense to me I mean it's the same thing as when you stand up close to a 1080p TV with the face up close to the screen you'll most likely be able to see the pixels given that pixel densities on most HD TVs are around 50 PPI give or take depending on the size now what that may seem really low to you when you go sit back on the couch those individual pixels just sort of blend away into the picture to the point where they're not even noticeable what these experts are saying is that the 250 to 350 PPI range is more than enough for us not to be able to see the difference when it comes to our phones well it's a logical argument you know me I started to see it for myself so after hours of analyzing these two screens side by side looking at a whole rate of pictures and text with just my eyes this time so no microscope as I say that I actually do see a difference but it's something that I only noticed when I'm actually looking for the difference with the phone close up to my face like this with the phone further out like this with ordinary viewing I honestly can't see the difference and that's what the perfect vision now with the whole 1080p or 720p argument this is how I sum it up you don't necessarily see the difference with your eyes on a day-to-day basis with ordinary viewing but there definitely is a difference as clearly evidence when you look at it under the microscope which sort of makes you feel the difference when using the two phones but as a disclaimer I have to tell you that I think the majority of that feeling of better quality at least when it comes to these two phones is due to the better screen technology using the galaxy s4 compared to that on the galaxy s3 just like when you're comparing super LCD to - super three screens I guess what I'm trying to say is that just like with cameras it's not all about the resolution resolution definitely plays a big part a huge part as more resolution does mean more detail but at the same time things like contrast brightness and even energy efficiency also play a role in what makes one display better than the other so when it comes to these two phones the galaxy s4 screen is better I mean hands down there's really no question about it but when I say that it's mainly because the s4 display is brighter and its colors a little bit more accurate it was the other way around where the s3 had the 1080p resolution and the s4 had 720p but everything else on the two screens stay the same I think I'd still go for the s4 screen because again the difference in resolution isn't all that noticeable on a day to day basis but brightness the contrast and all those other things definitely are with that said though I'd still like to see 1080p resolution on high-end smartphones from here on now at least performs with screens over four and a half inches sure there isn't a significant perceptual difference between the two and the extra pixels can actually consume a little bit more battery life but being the phone book that I am and I'm sure you guys can agree with me on this one I just like knowing that my screen is completely maxed out as in no matter how hard I look near or far I can't see the individual pixels on my screen now wondering my phone screen maxed out doesn't mean I don't want anything higher than 1080p on a smart phone I mean if a five-inch phone had a 4k display or something crazy like that it would have a PPI of over 850 which wouldn't be a complete waste and I don't even want to imagine what the battery life would be like so honestly 1080p is the highest resolution we really need on a smart phone at least in the current form factors and I think it's the highest resolution that could be at least somewhat justified considering the tool those extra pixels take on battery life and the total cost of the phone on tablets however it's a whole different story the bigger screens mean less pencil density with the same resolutions so bumping up resolutions to at least 1080p or higher on 7 and 8 inch devices and up to 4k resolutions on 10-inch tablets somewhere down the line would not only make a noticeable difference but it would also just be downright amazing and speaking of amazing just put things into perspective really quick a fork a 10-inch tablet which is double the resolution of 1080p would give you a PPI of around 440 which if you recall is right around you're already getting on most 1080p smartphones today so yeah pretty crazy okay there are a few other differences between 1080p and 720p which are explained in the link to phonebook calm right below the like button of this video where you also see a comparison with a galaxy s2 screen under the microscope which in case you don't remember how to resolution of just 800 by 480 so definitely something we're checking out but that's pretty much it for me in this video if you liked it please give it a thumbs up and subscribe to the channel to join over a hundred thousand phone books we get mobile technology videos just like this all the time thanks for watching and see you in the next video