Resolution of the Automobile Direct Printer system

The printing method of the Automobile Direct Printer system is completely different from that of other printers. The resolution in terms of "PPI" can be defined as follows: PPI = Pixels Per Inch For example, Pitch 1.28mm is corresponding to 19.8 PPI. For the Automobile Direct Printer System, one pixel consists of the overlap of Y(Yellow) dot, M(Magenta) dot and C(Cyan) dot, each of which has 256 density grades. Therefore one pixel is able to express 16.7 million colors {256 (Y) X 256(M) X 256 (C)}. This principle is exactly the same as the pixel system on your TV screen. K (Black) is added because the darkness of the image is supplemented with it. K dot also has 256 density grades. On the other hand, all other printers employ "Dither Method Print System", whose resolution is explained by DPI (Dots Per Inch). One dot consists of the overlap of Y dot, M dot and C dot, each of which has only two density grades (exist or not exist). The K dot also has two density grades. Therefore, the number of dots in a certain area expresses color gradation. The Automobile Direct Printer cannot be described in terms of DPI. The Automobile Direct Printer employs pixel-resolution system. However, should we be forced to compare, we can state that an image printed at 19.8PPI(our mid-range PPI), if seen from a distance of 5 meters or more would compare to that of a 200DPI graphic.