How are led displays classified?
Oct 29, 2021
1、 Divided by color: monochrome, two-color and three-color (full-color) led display screen:
(1) Monochrome refers to the luminous material with only one color on the display screen, mostly single red.
(2) The two-color screen is generally composed of red and green LED diodes.
(3) Three color (full color) screen, composed of red, green (wavelength 570nm) and blue; And true color, consisting of red, pure green (wavelength 525nm) and blue.
2、 Divided by environment: indoor, outdoor and semi outdoor LED display:
(1) The semi open air curtain has high brightness between indoor and outdoor, and can be used outdoors in the sun. The screen body is sealed, usually on the roof or window.
(2) The indoor screen area is generally small (more than ten square meters), and the point density is high. In direct sunlight or environmental lighting, the viewing distance is a few meters away. Because it is indoor, it does not need the open air, and the screen body can not have the sealing and waterproof function. Indoor display dot matrix module is mainly used, because the display brightness requirements for indoor use are not high.
(3) The outdoor display screen covers an area of tens of square meters, hundreds of square meters and even thousands of square meters. The point density is sparse (mostly 1000-4000 points per square meter), and the luminous brightness is 3000-6000cd / square meter (different orientations and brightness requirements). Under direct sunlight conditions, the viewing distance is tens of meters. Because it is outdoor, it must use a waterproof cabinet to have a good wind resistance, rain and lightning protection capability.
