Apple is set to begin mass production of the 4.7-inch display to be used in the iPhone 6 this May in preparation for the device’s general release this fall, according to a new report from Reuters. Citing supply chain sources, the report also states that the much rumored 5.5-inch version of the iPhone could be delayed due to difficulties with in-cell production technology, and is likely to commence several months after the initial production of the 4.7-inch displays. Japan Display Inc, Sharp Corp and South Korea’s LG Display Co Ltd have all been tapped to make the screens, said the sources, who asked not to be identified. …