updated 02:35 pm EDT, Wed June 9, 2010
iPhone 4's PPI claims seen as not close enough
Apple's claims behind the iPhone 4's Retina Display aren't completely true, display research veteran Raymond Soneira claimed today. While Apple claims that 300 pixels per inch (PPI) is the limit of the human retina and that the iPhone 4's 326PPI easily exceeds it, the DisplayMate president notes that the resolution would need to reach 477PPI for the pixels to truly be 'invisible' to a healthy human eye. Apple's claims don't become completely true until about 1.5 feet from the LCD.
Soneira noted that Apple would likely need to go above the retina's actual resolution to have a visually "perfect" display. Apple's Retina Display claims are thus another example of "spec exaggeration," he said. The researcher was nonetheless careful not to undermine the significance of the display, as he still thought it was the best mobile display on the market.
On stage, Apple CEO Steve Jobs had described the effect as occurring within one to two feet away, leaving some room for the marketing to be accurate but not by as much as mentioned at WWDC.
Many companies passed the iPhone 3GS' 480x320, 165PPI resolution when it was released but now trail significantly behind Apple's 960x640 screen on the iPhone 4, even with more available screen area. The Motorola Droid is often credited as having one of the highest resolution mobile displays at 854x480, but at 3.7 inches it reaches just 265PPI. In spite of its larger 4.3-inch screen, the HTC Evo 4G is coarser at 800x480 and 217PPI. [via DVICE]