Question

How to connect the control card and LED unit board?

Answer 1

Connecting the control card and the LED unit board is an important step in the installation process of the LED display, which is directly related to the display effect and stability of the display. The following are the specific steps and precautions for connecting the control card and the LED unit board:

I. Preparation stage

1. Confirm the materials: Make sure that the control card, LED unit board, cable (generally 16PIN or other types, determined by the unit board interface), power cord, multimeter and other tools are ready.

2. Check the power supply: Make sure that the power supply is connected and the power supply is stable, and the power supply output voltage and current should meet the requirements of the LED unit board and the control card.

II. Connect the control card and the power supply

1. Find the DC positive and negative connection switching power supply: Usually this power supply will have obvious positive and negative markings (+V and -V or VCC and GND).

2. Connect the power cord: Connect the 220V power cord to the AC or NL terminal of the switching power supply, and make sure the connection is firm. Then plug in the power supply and check whether the power indicator light is on.

3. Measure voltage: Use a multimeter to measure the voltage between V+ and V- to ensure that the voltage is within the appropriate range (usually 4.8V-5.1V, adjusted according to the unit board requirements).

III. Connect the control card and LED unit board

1. Determine the interface location: Find the corresponding interface on the control card and LED unit board, which may be 16PIN or other types of pin and female interfaces.

2. Connect the cable: Use the cable to connect the output port of the control card to the input port of the LED unit board. Pay attention to the connection direction of the cable, and do not connect it in reverse. During the connection process, you can use some tips, such as observing the logo or color on the interface to distinguish between input and output.

3. Check the connection: After the connection is completed, use a multimeter or test pen to check whether the cable connection is firm and whether there is a short circuit or open circuit.

IV. Fix the control card and unit board

1. Fix the control card: Fix the control card in a suitable position, usually in a corner or edge of the display, and ensure that it is stable and reliable.

2. Fix the unit board: Fix the LED unit board on the frame of the display screen according to the predetermined arrangement, and ensure that each unit board is firmly connected, flat and seamless.

V. Connect the data cable

1. Prepare the data cable: Select the appropriate data cable (such as RS232, USB to RS232, etc.) according to actual needs.

2. Connect the data cable: Connect one end of the data cable to the serial port or USB interface of the computer (if using a USB to RS232 converter), and the other end to the data interface of the control card.

V. Power-on test

1. Check the line: Before powering on, check again whether all line connections are correct and firm, and whether there is a short circuit or open circuit.

2. Power-on test: Turn on the power switch and observe whether the control card and LED unit board are working properly. If everything is normal, the predetermined content or image should be displayed on the screen.

Notes

1. Follow the specifications: During the connection process, be sure to follow the relevant technical specifications and safety specifications to ensure correct operation.

2. Careful operation: Since the interfaces on the unit board and control card of the LED display are dense and easy to confuse, you need to be careful during the connection process to avoid wrong or reverse connection.

3. Anti-static: Pay attention to anti-static measures during the connection process to avoid static electricity from damaging the control card and LED unit board.

4. Check compatibility: Before connecting, check whether the control card and LED unit board are compatible and whether the models match.

Answer 2

LED unit board is the main component unit of LED display screen, which is composed of LED light-emitting diode, driving circuit, driving IC and plastic kit.

It is usually a square or rectangular board that can be spliced ​​to display images, text and video.

LED unit board has high pixel density, high brightness, high contrast and high grayscale performance, which can greatly improve the display effect.

In addition, it is also highly maintainable. If a single unit board fails, it can be replaced, which is convenient for maintenance. LED unit board is widely used in shops, schools, stations, airports and other places.

Answer 3

LED display control card, also known as LED asynchronous control card system or LED strip screen control card, is the core component of LED graphic display.

It is mainly responsible for receiving data from computers or other signal sources, converting these data into display control signals, and driving LED display to present images, text or videos.

The control card controls the display data in the memory through the main processor, generates control signals compatible with the LED display, and transmits them to the driver chip carried by the display to control the LED module to emit light.

The LED display control card has multiple functions, including decoding, converting and executing control data transmitted from computers or other signal sources, driving LED modules to realize pixel light emission and light off, time sequence control light emission and light off, and brightness and color temperature adjustment.

In addition, it also integrates multiple communication interfaces, such as serial ports, network ports, etc., supports online data update, and ensures the real-time and accuracy of content.

According to different functions and application scenarios, LED display control cards can be divided into synchronous control cards and asynchronous control cards.

Synchronous control cards are mainly used to display video, graphics and other content in real time, and are suitable for indoor or outdoor full-color large-screen displays; while asynchronous control cards are mainly used to display various texts, symbols and graphics, with simple operation, low price and wide range of applications.

In general, LED display control cards play a vital role in LED display systems and are one of the key components to achieve high-quality display effects.