"Last week, the shopping mall promotion screen changed the 'buy one, get one free' offer to 'buy one, get two free', and the manager was almost sent away by his boss..." This may sound like a joke, but anyone who has worked with LED screens knows that text editing is full of pitfalls. Today we will teach you step by step how to find the right editing entrance, and you will be able to help the neighbors adjust the notification screen of the square dance team after reading this.

The first level: Find out the "mastermind behind the control card""

​​90% of novices fail at the first step - they simply don't find the right console.​​

• ​​Where to hide​ ​: Usually a palm-sized black box labeled "Ctrl Card"
• ​​How to connect​ ​: Use a network cable to connect to the computer (older models use a USB-to-serial cable, people born in 2000 may not have seen this thing before)
• ​​Must-see parameters​​：
  • The resolution must match the physical pixels of the screen 1:1
  • If the communication protocol is selected incorrectly, the screen will go black (common ones include HUB75E and HUB08)

Here’s a little trivia: Last year, a supermarket chain was complained about because the font size was too small. After changing it to size 72, sales increased by 15%. remember​ ​Font size ≥ 1/10 of screen height​ ​Only then can we see clearly that this is an unspoken rule of the industry.

Level 2: Don’t be dazzled by the fancy software operation

Common editing software on the market is divided into two categories:

Here comes the point:​ ​Low brightness and high gray technology​ ​Never use ordinary software for the screen! This type of screen requires a separate gamma curve setting, otherwise it will look foggy at night. Last year, a shopping mall window screen in Seoul suffered this loss. It took three adjustments to achieve a transparency rate of 86%.

Level 3: Don’t treat hardware buttons as decorations

In emergencies (such as disconnection), physical buttons can save lives:

1. ​​Brightness adjustment​ ​: It is recommended to start with 4000nit for outdoor screens during the day, otherwise it will be white under the sun.
2. ​​play mode​ ​: Single page display/carousel/scheduled switching should be distinguished
3. ​​language switch​ ​: Screens exported to Japan and South Korea may default to a foreign language interface.

To tell the truth: the exhibition site suddenly lost power and restarted, a Russian menu popped up on the screen, and the operators were so anxious that they searched for translators all over the place. Later, I discovered that pressing and holding the "Menu+Confirm key" for 5 seconds can reset the language - this trick has now become the industry emergency standard.

"Why is the text not fully displayed after editing? "

Ninety percent of the time it’s because of these three reasons:

• ​​Wrong canvas size​ ​: For example, the P10 screen is actually 1920×1080 pixels. If it is set to 3840×2160, the display will definitely be incomplete.
• ​​Missing font​ ​: Traditional Chinese characters or special symbols must be imported into the extended font library (Microsoft Yahei is recommended)
• ​​Cable failure​ ​: A certain module signal interruption will cause local display abnormalities.

Let me teach you a random detection method: change the text color to pure red, pure green, and pure blue and test respectively. Which color is not fully displayed means there is a problem with the corresponding lamp bead.

Editor's opinion: The most outrageous operation I have ever seen is to install the control software on the C drive. As a result, the system crashed and all settings were cleared. Say important things three times——​ ​Project files need to be backed up in the cloud! Cloud backup! Cloud backup! ​ ​ By the way, next time you see garbled text on a street advertising screen, don’t just take pictures and post them on Moments. Maybe you can use the knowledge you learned today to save the day?

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