Outdoor full color display, indoor and outdoor full color LED screen, LED large screen manufacturers Qingyuan color classification 1, by color can be divided into single-color large screen: single color (red or green). Dual-color large screen: red and green dual-color, 256 gray scale, you can display 65,536 colors. Large full-color screen: red, green, and blue color, 256 grayscale full color screen can display more than sixteen million kinds of colors. 2, by display Category LED digital big screen: large-screen devices for 7-segment digital tube, suitable for production of the clock screen, screen, and other interest rates, display digital electronic screen. Large-screen LED dot-matrix graphic: dot matrix display device is composed of many evenly composed of light-emitting diode display modules, suitable for broadcast text, image information, LED Video Display: The display is made up of many pieces of light-emitting diodes that can display video animation and other video files. 3, by using the occasion classification indoor big screen: luminous point smaller, usually Φ3mm - Φ8mm, to show the general area of ??a few dozen meters. Outdoor big screen: the general area of ??a few dozen to several hundred square meters, high brightness, can work in the sun, with wind, rain, water resistant. 4. The light spot diameter and spacing classification indoor big screen (by diameter points): Φ3mm, Φ3.75mm, Φ5mm, outdoor big screen (by pitch points): PH10, PH12, PH14, PH16, PH20, PH25, PH31.25 , PH37.5 ...... 5, static display, horizontal scrolling, vertical scrolling and page display. Monolithic module control drive 12 (to control up to 24) 8X8 dot matrix, a total of 16X48 dot matrix (or 32X48 dot matrix), is a single piece MAX7219 (or PS7219, HD7279, ZLG7289 and 8279 and other similar LED display driver module) 12 times (or 24 times)! Can be "cascade" approach composed of any large dot matrix screen. Display effect, low power consumption, and lower cost than using MAX7219 circuit.