Apple faking 489 to 815 PPI on iPhone 4 ads
Yesterday, I declared that Apple regained the smartphone technology lead and that the iPhone 4 was a massive leap forward in phone and video conferencing technology. But something didn’t feel right about the advertisement and promotional video Apple used to promote the iPhone 4′s new “Retina display” so I went back and examined the ads in detail. After close examination, it appears that Apple is showing 3 to 5 times the Pixels Per Inch (PPI) in their ads when they should only be showing 2 times the PPI. Furthermore, Do you really need 300 PPI on a 3.5 inch phone?
Update 8:40PM – Some people are suggesting that having 4 times the pixels on the iPhone justifies 4 times the PPI pixel density. Unfortunately for them, PPI is a linear measurement and not an area measurement of pixels. It would take 16 times the pixels to get 4x the PPI. PPI is by definition Pixels Per Inch and not Pixels Per Square Inch (PPSI). If it were PPSI, the iPhone 4 would have a PPSI of 106,276.
The first example is the slides used by Apple at the iPhone 4 launch event, and figure 1 below is derived from a photo taken by Engadget. The second example is Apple’s website promoting the “Retina Display”, and figure 2 shows how this is also inaccurate advertising.
Figure 1 – Steve Jobs shows iPhone 4 having 815 PPI
Figure 2 - Apple ad shows iPhone 4 having 489 PPI
Figure 3 – What a 2x and 4x improvement actually looks like
The iPhone 4 is truly a technological marvel that speaks for itself. But as wonderful as the new screen is, the evidence above shows that Apple is greatly exaggerating the screen quality of the device. Apple should really correct this.