What is the meaning of the term 'screen density'?

Screen density refers to the number of pixels displayed in a given area of a screen, typically measured in pixels per inch (PPI). It indicates how closely packed the pixels are on the display. A higher screen density typically means that more pixels are concentrated in a smaller area, which can lead to sharper images and finer detail. For instance, a smartphone with a high pixel density can show clearer and more detailed graphics compared to a device with a lower pixel density, which might appear pixelated or less clear when viewed closely.

Understanding screen density is essential when evaluating display quality. It impacts not only the visual clarity but also the effectiveness of text rendering and image reproduction on various screens. Other factors such as the angles of view dimensions, brightness levels, or color depth do not directly measure how many pixels are on a surface, making them irrelevant when discussing screen density.