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• Time of issue:2021-09-22 17:13
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(Summary description)

Each pixel of the single-color LED display screen consists of 1 single-color LED light-emitting diode, that is, each pixel contains 1 LED light-emitting diode; Dual-primary-color LED display each pixel is composed of 2 single-color LED light-emitting diodes, that is, each dual-primary color pixel contains 2 LED light-emitting diodes; and for the three-primary color For a full-color LED display, the diodes that make up the pixels include 3 or more, such as three diodes that emit red, green, and blue light. In this way, color display can be achieved based on the color matching principle of the three primary colors; and some display screens may be composed of 4 diodes in order to improve the display effect: 2 red LEDs, 1 green LED and 1 blue LED.  [5]

 

There are many types of LED display screens, which are roughly classified as follows:

(1) Press Display device points

LEDDigital display screen: The display device is a 7-segment digital tube, which is suitable for making clock screens, interest rate screens and other digital display Electronic display screen. LED dot matrix graphic display: The display device is a dot matrix display module composed of many evenly arranged light-emitting diodes, which is suitable for playing text and image information.  [2]

led display

(2) Classified by use environment

The indoor screen area is generally less than ten square meters,high dot density, use in non-direct sunlight or lighting environment, the viewing distance is a few meters away, the screen does not have the ability to seal and waterproof. The diameter of the light-emitting point is small, generally 3-8mm in diameter. The outdoor screen area generally ranges from a few square meters to tens or even hundreds of square meters, the dot density is relatively sparse (mostly 1000-4000 dots/m2), and the luminous brightness is 3000-5000cd/m2 (Different orientations, different brightness requirements), can be used under direct sunlight, viewing distances are tens of meters away, the screen has good wind and rain resistance and lightning protection capabilities. The basic unit of outdoor screen light-emitting is pixels, and the center diameter of the light-emitting point of the pixel is relatively large, such as P10mm, P12mm, P16mm, P20mm, P24mm, P26mm, etc. The semi-outdoor screen is between the outdoor and the indoor. It has a high luminous brightness and can be used outdoors in non-direct sunlight. The screen has a certain seal, usually under the eaves or in the shop window.  [2]

(3) According to control or use mode

Synchronous mode means that the working mode of the LED display is basically the same as that of a computer monitor. It maps correspondingly in real time with an update rate of at least 30 fields/sComputer The images on the monitor usually have the ability to display multi-gray colors, which can achieve the effect of multimedia advertising. Asynchronous (Or communication) means that the LED screen has the ability to store and automatically play. The edited text and non-grayscale pictures on the PC are transferred to the LED screen through the serial port or other network interface, and then the LED screen is automatically played offline, generally There is no multi-gray display capability, it is mainly used to display text information, and it can be connected to multiple screens.  [2]