Apple's iPhone 4: Thoroughly Reviewed
by Brian Klug & Anand Lal Shimpi on June 30, 2010 4:06 AM EST- Posted in
- Smartphones
- Apple
- iPhone 4
- Gadgets
- Mobile
More Display
It's obvious how Apple settled on 960x640; it's four times the resolution of the previous iPhones. However, instead of decreasing text size, iOS 4 scales appropriately, and the size of everything remains the same. The result is that there are small details everywhere that pop out. Apple's icons on the home screen are the first that really pop out, and new iOS 4 optimized applications will bring that increased detail as developers add higher resolution artwork.
The display panel itself uses a subset of IPS (In Plane Switching) display technology called Fringe Field Switching (FFS). Where IPS switches the crystal polarization in the plane of the display with two opposing electrical substrates composed of semi opaque metals (which decreases transmission and viewing angles), FFS uses considerably less metal by arranging the electrodes in a comb like structure.
See that - it almost looks like a comb. Or an impulse train. Or Dirac comb. So many combs.
The result is that there's considerably less metal in back and in front of the pixel, resulting in much higher transmission of light through the display, and higher brightness for a given backlight level. Using FFS to drive pixel switching is critical here because of the high dot pitch in the iPhone 4's display.
The other interesting difference between iPhone 4's retina display and previous displays is that the digitizer is in optical contact with the display itself. There's no longer an air gap, and as a result, no longer any opportunity for dust to gradually work its way inbetween. Over time, I've noticed a few dust specks creep in on my 3GS, it does happen. The digitizer and display panel are essentially laminated together. The added benefit is that fewer material interfaces results in fewer internal reflections - think the "super" in Super AMOLED but applied to TFT. That's what Apple has done here.
Apple is using Corning's Gorilla glass which touts hugely increased scratch resistance and robustness. Both the front and back of the iPhone 4 are that same type of glass. I've noticed a few superficial scratches (called sleeks) that have appeared on the back, but really the true test will be how the phone looks after 6 months in the pocket. It's interesting that the iPhone capacity markings have disappeared from the back of the phone - no doubt this was done so Apple could make one part and one part only for each color.
The rest of the details are in the specifications. Apple advertises increased brightness of 500 nits and a contrast ratio of 800:1. We measured, and our iPhone 4 exceeded specs at 571 nits and just under 1000:1 contrast ratio.
Note that the HTC EVO 4G is missing as Anand has it, but it's on its way to me. As soon as I get it, I'll measure display brightness, black point, and contrast and update these results. In addition, the HTC Droid Incredible (and thus Nexus One) contrast is effectively infinity by the way we calculate, due to pixels being completely turned off in the black state. In addition, I'm led to believe that the AMOLED's PenTile grid throws off our numbers when measuring brightness. I've run and rerun this test, it keeps coming up that way.
Next to the iPhone 4, the 3GS display really shows its age. It leaks light when displaying black, with an absurdly high black point of nearly 3 nits. Just looking at the lock screen on the iPhone 4 next to the 3GS it's readily apparent how much better blacks are. iPhone 4 easily bests the 3GS but still isn't quite as contrasty as the Incredible or Nexus One AMOLED displays, or the IPS in the Motorola Droid. You do get higher resolution and brightness, however, but nothing is free.
Going from the iPhone 4's display back to the 3GS is pretty painful, but going back to even relatively high dot pitch displays on the desktop is painful as well. Even on the "high resolution" MacBook Pro with 1680x1050 display, displaying an iPhone 4 screenshot at native resolution uses up 91% of the height. If there's one thing I hope the iPhone 4 display does, it's generate demand for 300 PPI level desktop displays - the era of 110 PPI displays being the norm needs to end now.
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Stuka87 - Wednesday, June 30, 2010 - link
Yet another top notch, in depth review Anand. I love the amount of depth you add to any review.One question, on the first page you refer to the SoC used in many Android devices as "Scorpion" rather than "Snapdragon." Is there an actual difference, or just different names for the same device? Or perhap Scorpion is more specific to the revision?
I am still thinking that for now I will keep my 3GS. next year when its time to upgrade, a new better iPhone will be out anyway.
Spoelie - Wednesday, June 30, 2010 - link
Scorpion is the CPU, Snapdragon is the entire SoC (with gpu etc etc)brandonicus - Wednesday, June 30, 2010 - link
Still reading the review, but from the first page pictures I have to ask...Did you already scratch your iPhone to hell? When seeing the front side comparison with the Nexus One I thought the iPhone looked terrible. Bad pictures? Or does it just scratch really easy?...I'm sure later in the review I'll read that you threw it on the ground a few dozen times :)ipredroid - Wednesday, June 30, 2010 - link
Many of your in-depth reviews have helped me decide on how to customize/purchase/learn about a product. Nevermind people saying you (Shimpi) are bias towards a product. People are just annoyed at anything Apple related because the media won't shut up about Apple. I realize you are smart enough not to respond to random haters and treat those here with respect and even respond to comments or questions. Thank you to the AnandTech team!The0ne - Wednesday, June 30, 2010 - link
Don't be a fool, many of us here are here at Anandtech because first many of us do like Anadtech ever since he started his site, secondly the reviews are good in general and lastly because most of us are either engineers or in the computer related field.What most of us criticized are valid to some extent. What I've criticized is immensely valid. Do the test and write the review without any type of unjustified opinions included. And if it's not too much trouble be CONSISTENT. I don't go around testing similar products every which way. I'm not saying Anandtech does this all the time but I get really annoy when things are not consistent from one review to the next; meaning testing was not consistent and thus results could be dark matter for all I know.
ipredroid - Wednesday, June 30, 2010 - link
You Proved my point, you randomly hated on a general comment I made, (which I made to no one in particular). No one here is a fool. Base your opinions off of facts not general assersens of which you are speculating. Misplaced criticism based on speculation is for tabloids. Which is unfortunately how you come across when you call people fools and bash with out facts. I'm sure you realize how Hypocritical you are being. You are entitled to your opinion of course but your ignorance shows when you don't base off of facts. (Referring to antenna issue) Apple and Google are both guilty of faulty antennas saying either company's engineers didn't test properly is just silly.The0ne - Thursday, July 1, 2010 - link
Your comprehension is misplaced. When I called you a "fool" it was in referenced to you saying."Nevermind people saying you (Shimpi) are bias towards a product. People are just annoyed at anything Apple related because the media won't shut up about Apple. I realize you are smart enough not to respond to random haters and treat those here with respect and even respond to comments or questions. Thank you to the AnandTech team!"
In short you are saying that some of us that have differing opinions on the subject matter are idiots and that Anand is smart to avoid us and our lame comments. That is pretty much your entire take on it. All I'm saying is that there are many professionals as members here on Anandtech, many of which are very intelligent. Assuming we're that dumb is foolish, and hence the use of the word "fool."
I'm sorry, this Antenna issue is a laughing stock to any respectable engineer. If could have only gone into the finish product by decisions made against the respectable Engineer(s). Whether you choose to believe otherwise is irrelevant because the FACT remains the problem is a basic one. Whether it's Apple, Google or our company is irrelevant as well. The discussion here is Apple iphone, thus the blame is directed at Apple. That does not imply it is ONLY Apple that does this.
And lastly where do you get off telling me I'm ignorant because of my "hate." Where is this hate you are talking about? You're making things up to justify your own means to have something to say to me, less the lack of comprehension in the first place. As for what I've said, that is very general. Why is asking "Do the test and write the review without any type of unjustified opinions included" full of hate?
Sorry you got the wrong idea of my original response.
ipredroid - Thursday, July 1, 2010 - link
I never said you were ignorant because of your hate... read it again... lol. Ignorant for calling me a fool and baseless facts (thank you for the apology). I even stated you ( everyone is) entitled to their opinion. Just stating some people comes across as "haters". People complain about everything, it is easier to see the bad rather than the good, human nature maybe.Anyways, I could careless, meant it as a thank you of sorts to the AnandTech team. Not to belittle other bloggers posts. To the overly negative with out sensible reasoning, yes. You, no. I enjoy reading others posts and rarely comment. I did this time because work put into the review by the AnandTech team seemed to be under appreciated in this review and I commented.
Of course anyone that runs a business isn't going to respond to distasteful posts rudely that wouldn't be smart. Not that those who are "haters" are idiots, even though they certainly can be.
IKeelU - Wednesday, June 30, 2010 - link
I liked the review. It seemed objective to me and I appreciate that the phone and OS were covered separately.Something that wasn't addressed: will the straight edges of the iPhone4 cause damage to one's pants (or one's purse)? My old Sony Ericsson candybar phone actually caused damage to the lining of my left pocket after several months of use. It seems like the iPhone4's edges are the sharpest-ever in a phone...
Though I must disagree about the iPhone 4 making the N1 look dated. In those photos, at least, the N1 looks way sexier to me.*
* I own an N1 ;)
tdream - Wednesday, June 30, 2010 - link
First of all calling the iphone 4 styling uptodate just because its new doesn't make any sense. Jobs says its like an OLD Lecia camera... The 3GS doesn't look dated in the objective sense. If you were to place these two devices in a test, a control group and another which was bombarded with marketing spiel (like the world has) you would get a vastly different viewpoint. Sharp edges are out, just because Apple have run out of ideas decided to be different doesn't mean it's better. Eg glossy vs matte, Apple have made matte cool again... even though all of my monitors are matte. Apple will do anything to be different and stand out, doesn't make it better though.Once again you ignore your own data and say the IPhone 4 is better than the 3GS even though in every case you tested it CLEARLY isn't. It a problem, you know it, Apple knows it, and now everyone in the world knows it. You "feel its better", well then if you feel it then I must feel it too right. Glad we live in a world which values science and facts too. Sorry but you're falling into Apple's main ploy right here, it's magical...
However the rest of your article remains fairly objective and up to your old high standards.