Kingsoft

Recently we often discussed iPhone4 the “retinal screen” on the pixel density, but most people do not grasp the key. Retina of the screen pixel density is not revolutionary – there Android phones for several months before approaching the resolution of 300ppi (pixels per inch 300) a. iPhone4 revolutionary, because it increases the user interface (UI) elements of the definition. Over the past two decades, almost all UI elements on the screen to follow a standard: 72ppi. This is the first volume of CRT monitor resolution, still in use. Either Windows or MacOSX, all the UI elements of the screen occupy a fixed number of pixels on the screen regardless of the number of pieces in total pixels, the figures are unchanged. Various UI elements are all “in the 72ppi screen will look” as the principle of design.

This means that Helvetica font, 12 pounds of lower-case letters on a screen in any of the percentage 8×9 pixel space (in most cases the case). Even more than the number of pixels on the display, and 12 pounds, or Helvetica for a total pixel so many pieces, it wants to become smaller than the naked eye looks. Display more pixels, it just means you have more space to display the content, but the UI elements of the definition is the same.

iPhone4 operating system is not the case, it is the screen pixel density and the visual interface software separation of these two things. Since OSX is designed from the outset to support for any resolution, iOS all the interface elements have been used is a vector image. In other words, iPhone4 piece of 3.5-inch screen UI elements occupy the area and iPhone 3GS is the same, but iPhone4 the teeth is the number of pixels used four times 3GS.

Since the image size the same, but so many more pixels, the resolution of these UI reached an unprecedented high – because so far all are to 72ppi resolution screen-based. In iPhone4 screen, 14 pounds of a letter will take 16×18 pixels, which means that it will fine a lot of curves and edges.

Solid particles is not iPhone4 retina pixel screen killer (although they are essential); the real killer is the UI elements in the piece of screen clarity.

(Android to some extent, to support any resolution, but not the system overall. Android will enlarge most of the UI elements, but most software does not support any resolution, so the effect does not look good.)