Question

What are the basic components of LED display?

Answer 1

LED display screen is composed of several display units (unit display panels or unit display boxes) that can be combined and spliced ​​to form the screen body, plus a set of appropriate controllers (main control board or control system). Therefore, display panels (or unit boxes) of various specifications can be combined with controllers with different control technologies to form many kinds of LED display screens to meet the needs of different environments and different display requirements.

Carefully decompose an LED display screen, which is composed of the following elements (taking the more complex synchronous video screen as an example):

① Metal structure frame

Indoor screens are generally composed of aluminum alloy (angle aluminum or aluminum square tube) to form the inner frame, equipped with various circuit boards such as display boards and switching power supplies, and the outer frame is made of brown aluminum alloy square tube, or aluminum alloy wrapped with stainless steel, or sheet metal integration.

The outdoor screen frame is generally composed of angle steel or I-beam according to the size and load-bearing capacity of the screen, and the outer frame can be decorated with aluminum-plastic panels.

② Display unit

It is the main part of the display screen, composed of luminous materials and driving circuits. Indoor screens are unit display panels of various specifications, and outdoor screens are unit boxes.

③ Scanning control board

The function of this circuit board is data buffering, generating various scanning signals and duty cycle grayscale control signals.

④ Switching power supply

Convert 220V AC into various DC and provide them to various circuits.

⑤ Twisted pair transmission cable

The display data and various control signals generated by the main controller are transmitted to the screen by twisted pair cables.

⑥ Main controller

Buffer, grayscale transform, reorganize the input RGB digital video signal, and generate various control signals.

⑦ Dedicated display card and multimedia card

In addition to the basic functions of a computer display card, it also outputs digital RGB signals and line, field, blanking and other signals to the main controller. In addition to the above functions, multimedia can also convert the input analog video signal into a digital RGB signal (i.e. video acquisition).

⑧ Computers and their peripherals

⑨ Other information sources, such as TV sets, DVD/VCD players, video cameras and switching matrices, etc.

Answer 2

1. Asynchronous screen:

Generally composed of display unit board (module), strip screen card, switching power supply, HUB board (optional). Connect to the computer through a serial line to change the displayed text, and then you can work without the computer.

2. Synchronous screen:

The synchronous screen system is more complex, and the system can be large or small. 

It is generally composed of a computer, DVI graphics card, data transmission card, synchronous data receiving card, HUB board, network cable, LED display screen, etc. 

The system always needs to work online with the computer to display the image and text on the computer on the large LED screen.

Answer 3

1. LED display module:

LED display module is the most basic component of LED display screen. It is composed of a group of LED units twisted together. Through programming control, it can realize the display of various images, texts and videos. 

It is generally divided into three types: monochrome, dual-color and full-color. Among them, monochrome can only display a single color, dual-color can display two colors, and full-color can display colorful images and videos.

2. Power supply and control system:

The power supply and control system are important components of LED display screen, which can control the normal operation and display effect of the entire display device. Among them, the power supply is generally powered by DC power, and the control system supports multiple input methods, such as network, serial port, Wifi, etc., and has rich control functions, which can realize the timing and carousel control of the display content.

3. Aluminum alloy frame:

The image elements are arranged on the large screen, and a stable frame is needed to support it. The aluminum alloy frame is one of the important components of LED display screen. It is made of strong and lightweight aluminum alloy material. The aluminum alloy frame can still maintain the stability of the screen under the troubles of wind, sun, rain and snow, and its profile perfect processing and polishing process can greatly improve the display effect.

4. Finished product connection and transmission system:

The finished product connection and transmission system is also called the signal transmitter, which is the starting point and end point of the LED display electronic device for data transmission. In the installation process of the LED display, the signal transmitter is no less important than several other parts. This system allows the screen to receive and process signals sent by computers, mobile phones and other devices, and convert them into displayable images, text, videos and other forms.

5. Auxiliary parts:

In addition to the parts mentioned above, the LED display also requires some auxiliary parts to help it operate. Among them, fans, radiators, temperature sensors, etc. are considered to be important auxiliary equipment. 

The main function of these auxiliary equipment is to ensure that the LED screen will not short-circuit and overheat when it continues to work for a long time.

In summary, the basic composition of the LED display includes LED display module, power supply and control system, aluminum alloy frame, finished product connection and transmission system and auxiliary parts. 

These parts cooperate with each other during the operation of the LED display to provide a clearer and more stable display effect.