TRADITIONAL

Image quality on these displays increases according to the density of luminous dots (pixels) making up of them, that is resolution (number of pixels per square metre) definitely represents the major element of graphic quality. In traditional fullcolor production, each pixel is composed by a cluster of LEDs with three basic colours (Red, Green, Blue: RGB). Their positioning on printed circuit boards is “gathered”, or rather electronically driven as if it was a unique inseparable unit, “pixel to pixel” (FIG.1).

SQUARE PIXEL

In new “Square Pixel” fullcolor technology on-board-mounting drawing is like a “carpet”; diodes are the same distance from one another, placed in an alternate and crossed way, and are electronically controlled “LED to LED”. Thanks to the special configuration of individual LEDs and powerful electronic management characterised by very high refresh rate (400 frames per second), correspondence is not one-to-one any longer but now pixels are created also by using LEDs from adjacent pixels; they actually share LEDs. Let’s take into consideration, for instance, the first pixel in the upper left side of FIG. 2 composed by 4 LEDs, 1 Blue, 2 Red, 1 Green; you will see that the two adjacent LEDs (Blue and Red) on the right hand side, connected through signal to the two LEDs (Red and Green) belonging to the first pixel, allow obtaining another completed pixel (Red, Green, Blue, Red). By horizontally linking LEDs together through electronic system, the number of visualised horizontal pixel will be doubled and the same will happen vertically, with the final result of multiplying by four their total amount.