Pixels per inch (PPI) or pixels per centimeter (PPCM) is a measurement of the pixel density (resolution) of devices in various contexts: typically computer displays, image scanners, and digital camera ...

Here is a rumor that has caused quite a furore in the world of e-paper displays – that E Ink has created a 13.3-inch e-paper display having 300 PPI resolution. This first appeared on the Chinese ...