First, an LED screen is assembled from many modules, and each module contains many pixels. The spacing between pixels is the basis for product selection. This is represented by "P" in the industry, for example: P4, P1.25, etc. The smaller the value, the better the image quality of the product, and of course, the more expensive it is. LED displays are also classified by display color and function into full-color, dual-color, and single-color. Single-color: The screen is composed of LEDs of one color, and can only display one color, such as red or white. Dual-color: The screen is composed of LEDs of two colors and can display more than 6500 colors. Full-color: The screen is composed of red, green, and blue LEDs and can display more than 16,700,000 colors.
Understanding the structure of the entire system is also crucial. First, you need to understand what specific components are needed in different situations. First, you need to know the difference between a synchronous system and an asynchronous system. Synchronous system: In the simplest terms, the input signal from a computer or other source is directly transmitted to the display screen, providing real-time display. For example, a teacher connecting a computer to an LED screen during a class. Asynchronous system: For advertisements repeatedly played on large screens in shopping malls or outdoors, there is usually an information distribution box, eliminating the need for a direct computer connection. The system should be selected based on the actual situation; monitoring and display applications require a synchronous system. So, what equipment is needed for a complete system? LED screen, power supply, receiving card, video processor; or LED screen, power supply, sending card, input board, receiving card, splicing processor, etc.
Regarding the power supply, the most common configuration is one power supply for six modules, but it's also necessary to consider whether one power supply can adequately power six modules.
Control card: Most modern receiving cards are quite feature-rich, and receiving cards with storage functions can be directly connected to the display screen and display images. Note that receiving cards are arranged vertically; you can place as many cards as needed, or arrange them horizontally, but they are usually arranged in columns.
Cabinet: Cabinets are divided into waterproof and non-waterproof types. By material, they are divided into: carbon fiber, magnesium alloy, die-cast aluminum, and ordinary cabinets. The cabinet is used to fix the LED modules and other equipment. One cabinet typically holds about 6 modules, and multiple cabinets are then assembled together to form a large display screen. The cabinet also houses the receiving card, power supply, and wiring.
Typical uses of the cabinet include: 1. Small-pitch, large-area display screens (small pitch is generally P2 or less, for example: P1.25).
2. Outdoor screens definitely require cabinets, and they must be waterproof.
Video Processor
Generally, with a video processor, a computer is not needed, but this depends on the specific situation. Another situation where a video processor is not needed is when there is an input board and a plug-in sending card; in this case, the combination of these two acts as a server.
