Schematic of the rumored next generation iPhone with a 4-inch screen appears to have been leaked to various blogs like iLab and Cydia Blog.
The schematic shows measurements of various components found on the iPhone’s front panel including the the widely rumored larger display.
The “active area mask,” or the portion which houses the display, measures 3.55 inches vertically and 2.02 inches horizontally, according to the schematic.
By applying the Pythagoras theorem, we arrive at a diagonal length of approximately 4.08 inches. Although this is slightly larger than 4 inches, the display opening is known to measure a bit more than the screen itself.
This means that the display might end up measuring exactly 4 inches diagonally, with a 16:9 aspect ratio, corroborating earlier speculation and the recent front panel leak.
The schematic also suggests that the front facing camera would be moved to above the earpiece. The bottom placement of the headphone jack and the smaller dock connector are also reflected in the schematic.
Click on the image above to see the larger version
The schematic does not show an exact total height for the part in question, but calculations based on pixel counts and the known height of the display mask area suggest that the overall height of the part is roughly 122 mm, approximately 7 mm taller than the overall height of the iPhone 4S.