Display Analysis

As with a discussion on performance in mobile devices these days, the iPad mini's display requires both an experiential analysis and an objective performance analysis. I'll begin with the experience.

Without a doubt, the iPad mini presents an evolution in form factor and nothing else. Everything from silicon to display technology are known quantities at this point. While it's true that in many senses, even Apple's previous generation mobile hardware is pretty good, the fact of the matter remains that the mini doesn't push the envelope in anything but form factor. That's not necessarily a bad thing, it's just reality. I should also point out that many smaller-versions-of-bigger-things follow this same approach of not pushing the performance envelope for obvious reasons.

Pixel Density Comparison

Doing the math on the mini's 1024 x 768 display results in a pixel density of 163 pixels per inch. A tangible improvement compared to the original iPad's 132 PPI, but keep in mind the smaller screen may have to be held closer to your eyes. Compared to other tablets, the mini's display resolution isn't anything to write home about. In practice, the mini's makes reading small text a problem:


While the 3rd and 4th gen iPads have a large enough display at a high enough resolution to make it possible to view the Dell configurator in the photo above without zooming, the same can't be said for the iPad mini. You're going to need a double tap.


iPad 2,4


iPad mini


iPad 4

Although reading text is one area where the absence of insane numbers of pixels is clearly obvious, it's visible in some photos as well.


iPad mini (left) vs. iPad 4 (right)

Where a lack of fine detail doesn't get you, the physical size of the display may. I was pleasantly surprised by the usefulness of Apple's 7.85-inch display, but given my early affinity towards 8-inch tablets it's not too shocking. Despite how useful the mini's display is, I found myself having to double tap to zoom in on most desktop websites just to make the reading a bit better. It's not that the process of zooming in on a website in mobile Safari is particularly cumbersome, it's that the fact that I have to makes me feel like I'm using more of an iPod Touch and less of an iPad. I do admit the feeling is quite irrational as I prefer keeping the iPod Touch (or iPhone in the case of, reality) holstered and using the mini instead. This is less a criticism of the iPad mini and more guidance for those deciding between mini and regular sizes of the iPad.

Compared to a true 7-inch tablet like the Nexus 7, the additional screen size is definitely appreciated - particularly when reading web pages:


Nexus 7 (left) vs iPad mini (right)


Nexus 7 (left) vs iPad mini (right)

When Vivek and I brought up the topic of the mini's lower pixel density on the Podcast, our own Brian Klug pointed out the obvious: we're spoiled. How impressed/unimpressed you are with the iPad mini's display really depends on what other displays you've been exposed to. In a vacuum, the iPad mini's display is fine. Brightness, black levels and contrast are all reasonable (and much better than most notebooks). Color reproduction isn't bad either. In the spectrum of all displays available at the mini's price point, this 7.85-inch 1024 x 768 panel isn't bad. Spend any appreciable time with the bigger iPad's Retina Display however, and your opinion will quickly change.

Display Brightness

Display Brightness

Display Contrast

In our Surface review I titled the display section "Not Retina, But Still Good". Compared to the Surface display, the mini has better color accuracy but clearly loses out in black levels thanks to Microsoft's laminated display + cover glass stack.

To evaluate color accuracy I turned to our own Chris Heinonen's CalMAN smartphone/tablet workflow. We'll start off by looking at the calibrated white point for these tablets. What you're looking for here is a number close to 6500K:

CalMAN Display Comparison - CCT

The mini doesn't really diverge from other iPads here, although Microsoft comes closer to 6500K at 200 nits.

The next three charts look at accuracy represented as a difference between various source colors and what's reproduced on the display. The results are presented as average dE2000, with lower numbers being better.

First up is Grayscale performance, here we're looking at the accuracy of black, white and 19 shades of gray spread in between the two extremes:

CalMAN Display Comparison - Grayscale

The mini does reasonably well here, it actually ends up a bit better than the 4th gen iPad. Grayscale accuracy doesn't seem to be too difficult for most folks to get right, but what happens when we start looking at colors?

First in our color accuracy tests is a saturation sweep. Here we're looking at 20%, 40%, 60%, 80% and 100% saturations of red, blue, green, magenta, yellow and cyan.

CalMAN Display Comparison - Saturation Sweep

Now we start to see the retina equipped iPads pull away from the mini. Compared to the iPad 2 and even Microsoft's Surface, the mini looks pretty good, but if you compare it to the Nexus 7 or newer iPads it's clearly at a disadvantage. All of these displays are significantly better than the average notebook panel. As I mentioned earlier, it all boils down to perspective and expectations.

Gamut CIE Chart


 

Saturation CIE Chart


 

For our final accuracy test we're looking at the difference between a Gretag Macbeth colorchecker chart and the rendered swatches on these displays. Once again, lower numbers are better.

CalMAN Display Comparison - GMB Colorchecker

Once again, the iPad 3/4 can't be touched here, with the iPad mini falling significantly behind. Colors simply look better on the bigger iPads. The Nexus 7 does better here as well. Subjectively I found colors on the Nexus 7 to look appreciably more accurate than on the mini.

GMB Color Checker


With regards to the quality and accuracy of the images rendered on the mini's screen, I feel the same way about it as I do the display on Surface: it's not a Retina display, but still good.

Design & Smart Cover A Retina mini?
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  • daar - Wednesday, November 21, 2012 - link

    Who manufactures the display? I recall in reviews of old this was mentioned, would be nice to see in future reviews of anything with displays this info, thanks. Reply
  • zepi - Tuesday, November 20, 2012 - link

    Since the current-gen ipad-retina-displays are pretty abysmal in terms of power usage (see displaymate's measurements for example), would it be unreasonable to expect LTPS or IGZO panels to make things considerably better?

    Apple uses Low-Temperature polysilicon IPS in iphone for a reason and it's said that the forthcoming IGZO's would help in power consumption as well.

    I think that Ipad 4 is a "failure" as it doesn't address any of the shortcomings of the 3rd Gen ipad. Namely weight, thickness and reasonably poor visibility in direct sunlight. Though Apple just decided it's not worth the tradeoff to use A6 instead of A6x to reduce the battery weight by a tiny margin.
    Reply
  • doobydoo - Wednesday, November 21, 2012 - link

    Firstly - the iPad 4 isn't a 'new iPad' as much as the iPad 3 was - it's an upgrade a partial way through the year, so it shouldn't be expected to address all 'the shortcomings'.

    Secondly - the iPad 4 doubles the GPU power which addresses the single biggest issue with the iPad 3 - the underpowered GPU. It's significantly faster than any other tablet (as is the iPad 3).

    Also it was important to get all the devices using the lightning connector.
    Reply
  • Alucard291 - Wednesday, November 21, 2012 - link

    Yeah its the newer new ipad >.>

    Also known as the biggest ripoff apple has yet produced. Lightning connector (differently shaped usb 2.0), not-really-upgraded soc which brought nothing for the end user. Right? Because iOS is always super smooth? Or is it not?

    Wait wait wait and you're also saying that having even more unused gpu power is a shortcoming that was addressed? Well no point arguing with such logic.

    Especially since the cpu is already outdated. A9's (even with a custom memory controller) are so 2011.

    Man you are a MASTER of facepalms. You initiate a wave of them with every post of yours.
    Reply
  • NCM - Wednesday, November 21, 2012 - link

    Alucard291 writes: "Lightning connector (differently shaped usb 2.0)"

    Bzzt! Wrong.

    Thanks for playing, come back when you've done your research properly.
    Reply
  • Jorange - Tuesday, November 20, 2012 - link

    Why did you zoom in on the Anandtech website on the Nexus 7, whilst the iPad mini is zoomed out, it makes the Nexus look like it can't display a full webpage which it can!! Subtle Anti-Android bias strikes again. Reply
  • ChronoReverse - Tuesday, November 20, 2012 - link

    I don't know about bias (I like to attribute ignorance over malice) but it seems particularly bad that not only is the N7 zoomed in compared to the Mini, but it's zoomed in so much that the N7's image is larger than the Mini's.

    I can see zooming so that they're physically the same size (but then the N7 would be using more pixels to render the same thing) but it's not even at that level.
    Reply
  • michal1980 - Tuesday, November 20, 2012 - link

    because Anand's bias is showing.

    Still waiting for this rumored 'Anandtech' windows 8 review. But OMG look a small ipad, the site owner himself reviews.

    Might as well start renaming the website 'appletech'
    Reply
  • Ryan Smith - Tuesday, November 20, 2012 - link

    Our Win8 performance guide will be done this week. We're not doing a massive review (that would mostly be rehashing our significant DevPrev and ConPrev articles) will hit all the high points.

    And note that what Anand does has no bearing on Win8. AnandTech is more than one person, and in this case since I'm the OS guru it's my article.
    Reply
  • michal1980 - Tuesday, November 20, 2012 - link

    I'm just disapponted that a site I've trusted and visted for years, is changing focus.

    if its an apple thing, there are tons of in depth reviews done right away, product, os, accessories etc etc.

    windows is now becoming the abandoned step child.

    look at this, pages of writing, that could be summed up in 2 words:

    smaller ipad.
    Reply

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