Will ClearType Sub-Pixel Rendering on the Microsoft Surface Improve its Sharpness?
Back in my 2011 iPad 2 and iPhone 4 Display Shoot-Out I pointed out that the sharpness and text quality on the 1024x768 132 Pixels Per Inch PPI iPad 2 could be significantly improved by using Sub-Pixel Rendering rather than the Pixel Rendering that is used on the iPads and iPhones. And I did a side-by-side comparison between the iPad 2 and an essentially identical Asus Netbook with a 1366x768 130 PPI display that had Microsoft's implementation of Sub-Pixel Rendering, which they call ClearType. With Sub-Pixel Rendering the individual Red, Green and Blue Sub-Pixels are treated as independent addressable image elements and are not all bound together into specific Pixels. In some cases Sub-Pixel Rendering can make the screen appear to have up to 3 times the resolution of Pixel Rendering.
Microsoft Surface RT: This issue is surprisingly relevant again for the upcoming Microsoft Surface RT Tablet, which has a 1366x768 148 PPI screen that is fairly similar to the iPad 2 1024x768 132 PPI screen. So the question is how will it compare with the iPad 2, and especially now with the equivalently priced much higher resolution new iPad 3? While I haven't yet seen the Microsoft Surface RT Tablet, its screen specs are almost identical to the Asus Netbook so I repeated the Display Shoot-Out - this time with both the iPad 2 and the new iPad 3, which has a 2048x1536 264 PPI screen. A CNET article quotes Microsoft as claiming that the Surface RT is sharper than the new iPad 3. So I decided to do a comparable test with the Asus Netbook standing in for the Surface RT.
The Shoot-Out: I ran the Safari Browser on all 3 displays and compared them side-by-side using the New York Times website front page with its small text. All 3 displays have the same 5.9 inch screen height in Landscape mode, so it was an excellent and very fair comparison.
The Result: The Windows ClearType 768p display on the Asus Netbook was significantly sharper than the iPad 2 768p display but also significantly less sharp than the new iPad 3 1536p display. It is certainly possible that the Microsoft Surface RT Tablet will perform better than the Asus Netbook, but it is very unlikely that it will turn out to be visually sharper than the new iPad 3. On the other hand the Windows Pro version of Surface will have a 1920x1080 208 PPI screen, and it is quite possible that it will be comparable in sharpness to the new iPad 3 with 2048x1536 264 PPI. It will be really interesting to compare them all... including the displays on Windows Tablets from other manufacturers, who might provide better displays than the Microsoft Surface...
Windows Tablet Shoot-Outs: Sharpness is only one aspect of display image quality. I will be doing an in-depth Display Shoot-Out between the Microsoft Surface RT and the new iPad 3 when the Surface RT ships, and I will be repeating this sharpness test. When other Windows Tablets ship I will include the best of them in future Mobile Display Shoot-Outs. So stay tuned...