How are led display screen video wall classified

LED display screen can display changing numbers, words, graphics and images; It can be used not only indoors but also outdoors. It has incomparable advantages over projectors, TV walls and LCD screens.
For example, in stadiums and gymnasiums, the large screen display system can display the game live and the game score, time, wonderful playback, etc; In the transportation industry, it can display the road operation; In the financial industry, it can display financial information in real time, such as stocks, exchange rates, interest rates, etc; In the commercial post and telecommunications system, it can display notices, messages and advertisements to customers.
Walking into the city streets, shopping malls, squares and other places, you will see a variety of LED displays, which have a wide variety. The common classification methods are as follows:

1、 By display color
Single primary color display screen (red or green, including pseudo color LED screen)
Dual primary color display (red or green)
Full color display (three primary colors, i.e. red, green and blue)
2、 Score by display performance
Text LED display
Graphic LED display
Computer video LED display
TV video LED display
Market led display, etc.
Among them, the market led display screen generally includes LED display screens for securities, interest rates, futures and other purposes.
3、 Divided by luminous material, point diameter or point spacing
(1) Module (for indoor screen): it can be divided into two modules according to the diameter of LED single point
(2) Module and pixel tube (for outdoor screen)
(3) Nixie tube (used for market display)
Generally speaking, the viewing distance is close, the display area is small, the selected center distance is also small, the density is high, and the cost of the display screen per unit area is also high; If the viewing distance is long and the screen area is large, the selected center distance is also large, the density is relatively low, and the cost of the display screen per unit area is relatively low.
4、 By service environment
Indoor screen, outdoor screen and semi outdoor screen;
5、 By gray level
It is divided into 16 levels, 32 levels, 64 levels, 128 levels, 256 levels, etc.
6、 It is divided according to the LED packaging form at the time of manufacture
(1) Surface pasting LED screen: package LED chip into LED lamp ☞ make unit board ☞ assemble unit board into box ☞ splice box into electronic screen. The surface pasted LED screen can only be used in indoor environment.
The surface paste LED screen is divided into surface paste three in one screen and separated surface paste screen. The main difference is that the surface paste three in one screen encapsulates three LED chips in one LED lamp, while there is only one chip in each LED lamp of the separated surface paste LED screen.
(2) Sub surface pasted LED screen: also known as in-line LED screen, the shape of its light-emitting devices is circular and oval. Because of its good condensing and brightness, it is suitable for outdoor environment.
(3) Dot matrix LED screen: this method does not use LED lamps. First, the LED chip is directly made into an 8X8 LED dot matrix module, then the dot matrix is made into a unit board, and finally the unit board is spliced into a display screen. Due to the large angle and low brightness of dot matrix LED screen, it can be used in indoor environment.
7、 According to the appearance of LED screen
(1) Led spray painting screen: spray painting effect during the day, and led billboards can display different effects at night. At present, it is very popular in the market.
(2) Grid LED screen: it is mainly used in stage performances and other occasions. There are a variety of production methods. The screen is light, simple and modular. It is very conducive to the installation, splicing, disassembly and movement of LED screen. It is the best choice for led stage background screen at present.
(3) Arc LED screen: due to the special requirements of installation location, environment and required display effect, the display screen needs to be made into an arc. Since the radian is generally small in the outdoor environment, the box can also be made into a solitary module, and the ordinary LED module is still used; If the radian is too large, special unit boards and modules can be used to make LED signs.
(4) LED strip screen: This is the most widely used display screen in the market at present. It is mainly used as a simple LED signboard to display monochrome or two-color fonts; Full color bar screens are rare in the market.
8、 Score according to playing requirements
(1) Synchronous LED screen: the content displayed on the display screen is synchronized with that displayed on the playback equipment (computer, video recorder, DVD, satellite TV, etc.). Due to the high cost of synchronous LED large screen display system, the general led synchronous screen is mainly used when the screen body is relatively large.
(2) Asynchronous LED screen: the external device plays the role of modifying and sending the display content. As long as the content to be displayed is transmitted to the screen receiving device, even if the sending system is turned off, it will not affect the display of LED electronic large screen. Asynchronous LED screen is divided into asynchronous grayscale system and system without grayscale. Asynchronous grayscale system can receive video, pictures and other contents that need grayscale display. Those without grayscale are suitable for playing tables, text and other contents.