​"Why can't I find the text setting entry for three hours?"​​ Xiao Wang, a newly-entered shopping mall operator, stared at the control software and scratched his head until he found the small iron box with a magnet in the corner of the display screen. Engineers who have been in the industry for eight years revealed that 90% of text setting problems are actually stuck in the first step—Find the right core control unit​. Today we will use the most straightforward vernacular to disassemble the entire process of LED display text settings.

1. Where is the "heart" of the control system hidden?

Many people think that text setting is a software operation, but hardware positioning is the key.​​The metal box smaller than a cell phone​​, the industry calls it a "control card", which is usually hidden in three locations:

• ​​Right edge​​: 80% of the outdoor screen is installed on the right side when facing the screen, and is attached to the inside of the frame with a magnet.
• ​Near the heat dissipation port​: Stadium fence screen with IP65 protection, the control card will be hidden behind the waterproof heat sink
• ​​Case mezzanine​: In the quick disassembly structure of the rental screen, you can see it by lifting the thinnest aluminum plate.

​Key Tips​: Never use a screwdriver to pry it hard! When encountering a snap structure, you can open it by using your bank card to scratch the gap. A shopping mall once deformed the circuit board due to violent disassembly, and the repair cost was 23,000 yuan.

2. Three life gates of software operation

Finding the control card is just the beginning. The next three parameters are set incorrectly, which makes you doubt your life in minutes:

1. ​​Resolution matching​​
   It’s not that the display screen is as big as it is! Get the number of lamp beads in horizontal and vertical directions. For example, see that the display screen is spliced ​​horizontally by 32 modules, and each module has 64 lamp beads, and the total width is 32×64=2048 pixels.

2. ​Communication protocol selection​

   • USB drive control: Remember to check "Auto Read" when selecting "Offline mode"
   • Mobile phone remote control: Android phone must turn off smart power saving mode, otherwise it will be disconnected after half an hour
   • Direct connection to the network cable: The third segment of the IP address must be consistent with the router (for example, 192.168.​​1​​.100）

3. ​​Grayscale correction​
   Calibrations are performed twice on cloudy and sunny days:

   • Keep the default Gamma value of 2.2 on cloudy days
   • To avoid overexposure on sunny days
     A chain supermarket did not perform seasonal calibration, and the text set in winter became "white light ball" by summer.

Three or five common modification methods to test

Here is a comparison of the mainstream operating methods on the market, and you will know which one to choose after reading it:

​​Lessons of blood and tears​​: Play with WeChat control on your Apple phone, don’t upgrade to iOS19! The new system has changed the Bluetooth underlying protocol, and eight out of ten cannot connect.

4. Self-question and self-answer session

​​Q: Why is the text displayed incomplete after setting?​​
A: Ninety percent of the "display area" is selected correctly without box. Drag the red dotted box in the software to completely cover the blue background grid. There is a trick: pull the border out 5% in each of the four directions and try again.

​​Q: How to set the night mode without being dazzling?​​
A: Don’t adjust the brightness directly! Experts change the color temperature:

1. Reduce 6500K to 4500K after 8 pm
2. Red brightness drops by 20%, blue rises by 10%
   When a subway station uses this method, passenger complaints have decreased by 76%.

​​Q: What should I do if the settings are lost after power off and restart?​​
A: It’s time to replace the button battery in the control card! CR2032 model will be replaced every two years to ensure safety. Teach you how to see the warning signal:

• Time display is five minutes slower → can last for three months
• The program order is inconsistent → Change immediately

Editor's opinion

Making text settings is like finding a object—​Knowing where the door is more important than being able to talk sweetly​. Next time you go crazy, touch the display frame to find the metal box with a heat dissipation hole. Remember, the temperature of the control card should be a little cooler than the palm of your hand. If it is hot, check the power supply voltage quickly - this is the diagnostic trick of the master.

for more product information and pricing, please contact us .