Have you just taken over the advertising screen in the mall, and was confused when you looked at the dense lines? Or I bought an LED screen to prepare for an event, but found that I had to find a manufacturer to change the word? Don’t panic. Today we will talk about this typographical change problem that makes newbies trouble, and ensure that you can start by yourself after reading it!

(Speak in a low voice: There was a guy who opened a milk tea shop two days ago. Because he would not change the price list of the LED menu screen, he forced himself to paste A4 paper for three days...)

1. Three common senses you must know before changing a character

​​1. Hardware type determines how to change words​​
There are two main types of common LED screens on the market:

• Monochrome screen (red/yellow/blue): You need to use a USB flash drive or data cable to import the font library file
• Full color screen: directly modify content through computer software

​​2. The software version must match​
The control software used for equipment produced in different years may be several versions of the difference. Just like your mobile phone system is too old and cannot install a new APP, the incompatible display software will lead to garbled code. It is recommended to directly find the seller to ask for supporting software, and don’t download it online casually!

​3. Remember the physical location​
When changing characters, be sure to confirm the partition number of the display screen, especially the super long LED advertising wall. There is a real case: A supermarket missed the "live fish special offer" in the fresh food area to the daily necessities area, but the aunts looked for fish around the toilet paper shelves for a morning...

2. Teach you the five-step method of changing words step by step

​Step 1: Connect the device​
It is important to find the right control card interface! There are three mainstream connection methods now:

1. Direct connection of network cable (suitable for fixed installation large screen)
2. WiFi transmission (favorite use of temporary active screens)
3. 4G cloud control (must have multinational chain stores)

​Step 2: Open the control software​
Here is a tip: Hold down the Ctrl key and double-click the software icon to automatically fix 80% of the driver problems. If you encounter a flower screen, don't rush to restart. Check the resolution settings first - many full-color screens must be set to 1920×1080@60Hz

​Step 3: Edit content​
Don't go beyond the security box for text areas! It is recommended for beginners to do this:

• Choose Microsoft's black or bold font
• Font size is 10% smaller than the display area
• Don't have more than two dynamic effects (such as flashing + scrolling is enough)

​Step 4: Preview the test​
Say important things three times:​Close the screen first and then send it! Turn off the screen first and then send it! Turn off the screen first and then send it!​​ Direct hot-swap and unplug easily burn the chip. Focus on testing:
□ Is there any jagged edges of the text
□ Is the color gradient natural?
□ Whether the scrolling speed and screen size match

​Step 5: Save regularly​
Set the automatic save interval (15 minutes recommended). I have encountered too many people working hard on the content because the power is out. There is a restaurant owner who is even more amazing - directly connects the display to the UPS power supply of the cash register, and can change the menu for two hours if the power is off.

3. First aid guide for failure to change words

​​Q: Why did the screen turn into snowflakes after changing the words?​​
A: Ninety percent of the communication protocol was chosen wrong! Check these three places:

1. Control card model (open the back cover to see the label)
2. Baud rate setting (commonly there are 115200 and 256000)
3. Scan method (mostly 1/4 of static scan)

​​Q: What should I do if the brightness drops significantly after changing the word?​​
A: Don’t rush to adjust the brightness parameters first! Check in this order:

1. Is the power supply voltage stable (Is there 12V under the multimeter?)
2. Oxidation of wire connectors (use eraser to erase gold fingers)
3. Lamp bead attenuation (screens that have been used continuously for more than 2 years must be considered for replacement)

​​Q: What should I do if some areas are not displayed normally?​​
I will teach you a trick: change the display content to pure red, pure green, and pure blue one at a time, and you can immediately locate which lamp bead is wrong. If the entire column is not bright, it is likely that the cable is loose; if it is missing in a random dot, it may have to change the control chip.

4. Hidden skills of professional players

Do you know why you choose the early morning when changing the text on the shopping malls with large screens? Because temperature changes will affect the display effect! There is a data you may not know: every time the temperature drops by 5℃, the brightness of the LED screen will increase by about 3%. Therefore, it is best to store parameters in an environment of 20-25℃ after changing the characters

Speaking of parameter settings, here is a cold knowledge in the industry:

• Indoor screen refresh rate recommended ≥1920Hz
• The brightness of the outdoor screen must be set to the range of 4000-7500cd/m²
• The stage screen must be turned on low brightness and high gray mode

(Suddenly I remembered that there was a concert last year. Because the LED floor tiles screen did not turn on the grayscale compensation, the singer's white skirt turned into fluorescent green, and was ridiculed for three days on the hot search...)

If you often need to change your words, it is recommended to prepare an "emergency tool kit":

1. Alternate USB drive (formatted FAT32 format)
2. RJ45 network cable tester
3. Multifunction screwdriver set
4. Insulating tape
5. Mobile phone hotspots (Internet download drivers at critical moments)

Editor's opinion: Whether changing the word is difficult or not, the key is to find out the temper of your own equipment. I have seen too many people complicate simple problems. In fact, just pay attention to the three points of software compatibility, parameter matching, and operation specifications, so that you can become a master from a rookie. By the way, it is important to clean the control card regularly. Dust accumulation will cause signal delays - I will only tell you who will see the end seriously!

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