First there was Retina. What’s next? How about a 4K, Ultra HD display? Nathanael Arnold has details about Japan Display’s new 4K smartphone screen.
The 5.4-inch screen has a 1440 x 2560 pixel display for a resolution of 543 ppi (pixels per square inch)… This is significantly higher than the resolution of Apple’s current flagship smartphone, the iPhone 5S. The iPhone 5S features a 1136 x 640 pixel display and a pixel density of 326 ppi.