The newly installed LED screen suddenly flashed with snowflakes, and the maintenance master spoke and wanted to change the driver - are you worried at this time? What is this driver? Where exactly is it hidden in the screen? Today we will find out this key component hidden deeper than the WiFi password.

Last month, I helped my friend check the shopping mall advertising screen. The power supply was obviously normal, but the screen just jumped like an electrocardiogram. The master took me to the back of the screen, pointed to the circuit board as big as a palm and said, "Here, this is the heart part of the driving force." I only realized thatDrivers are like the nervous system of the screen, controlling the light and dark changes of each pixel point​​。

​​Sweep the blind first​：

1. Driven does not only refer to a certain part, but a complete set of control systems (including receiving cards, driver ICs, and power modules)
2. 80% of common faults occur in the driver, such as screen stuttering, color distortion, and local black blocks
3. The driving schemes in different scenarios are very different, just like the gearbox of off-road vehicles and sedans cannot be mixed.

I saw a strange case in Electronic City: the store installed an indoor driver for the outdoor screen, but the board was burned directly during the rainy season. So say​You can’t just look at the price when looking for a driver. You have to figure out the application scenario first.​. Here is a tip - touch the temperature of the screen border with your hands. The normal working driver module should be slightly hot but not hot.

Now the focus is-​​The hiding place of the drive system​：

• The indoor screen is usually in the groove on the back of the box (four screws need to be removed)
• Rental screens like to be made into plug-in modules (note that the interface is dust-proof)
• The driver of the transparent screen is hidden in the frame mezzanine (it must be turned on with a special tool)
• The floor tile screen drives in the bottom waterproof compartment (don't use an ordinary screwdriver to pry it hard)

The most troublesome situation I have ever encountered is the LED wall in a hotel banquet hall. The picture always shows shadows at the climax of the banquet, and later it was discovered that the driver was poorly dissipated. The solution is to install two small fans on the side of the box—​The driving position directly affects the heat dissipation efficiency, which is easy for many novices to ignore.​。

A common mistake for beginners is to use the receiving card as a driver. In fact, these two are upstream and downstream relationships, just like the stove and spatula when cooking. There is a quick way to judge: if the entire screen is not illuminated, it may be a power problem; if there is a local problem, it may be a driver failure.

You may ask: How to determine whether to repair or replace the driver? Based on my practical experience over the past few years, I have compiled a comparison table:

I remember that last year there was a gym equipped with a mirror screen, and the customer insisted on buying driver accessories themselves. As a result, the model mismatch also burned the receiving card, and the maintenance fee tripled. So​No professionals should not disassemble the driver module casually. This thing is more delicate than the mobile phone motherboard.​。

There is also a cold knowledge: the software version of the driver system affects the service life. An old screen like that that has been used for more than three years suddenly has a stuttering screen, and it is very likely that the driver firmware needs to be upgraded. This is the same as updating the mobile phone system, but don’t flash the phone by yourself - I have seen tragic cases of flashing grayscale levels into black and white screens.

Recently, I have discovered a new trend, and many high-end screens have begun to use dual-drive backups. It’s like installing two engines for a car, and one has a problem and the other takes over immediately. Although the cost is 20%, it is really practical for performance venues where you can't make mistakes. So sayDriver configuration should also follow the usage requirements​。

Editor's opinion: Finding a driver is like finding a partner, and it is more important than being expensive. Next time you encounter a screen failure, take a deep breath for three seconds and remember this formula-​​View the phenomenon positioning, measure the voltage stably, and check whether the interface is firmly fixed​​. If you really can’t handle it, just take a video and find technical support from the manufacturer. Now formal enterprises have remote guidance services, which is better than random repairs and scrapping screens.

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