Dear friends who have just entered the industry, have you ever encountered this situation - you bought a large LED screen, but you were confused about the dense interface on the back? It’s like buying a new phone but finding that the charging port and headphone jack are gone. Don’t panic, let’s break this layer of window paper today!

1. The interface is actually under your nose

Let me tell you the truth first. The interface of the LED screen is like the charging port of a mobile phone, and is hidden in the most convenient location for operation. However, this "convenience" is not something to be said casually, there are tricks here.

​​The first stop: Find the "ID card" area first​
There is a metal nameplate on the back of each LED screen, and the interface area is usually within half a meter next to it. Why? Because engineers should consider convenient maintenance when designing! If the interface is hidden in a corner, the maintenance master will be cursing.

​​The second trick: identify the "Three Signal Brothers"​
These three standard configurations are certainly indispensable in the main interface area:

• DVI port that looks like a trapezoid (supports 8K ultra-definition transmission)
• BNC port with screw fixation (professional equipment favorite)
• Square network port (must have remote control)

For example, we installed a curved advertising screen for a shopping mall in Singapore. The interface area is designed to be 1 meter high on the right side of the screen. It can be operated without scaffolding during maintenance.

2. What do these interfaces do?

Now let’s play “Everyone finds fault” and see the abilities of different interfaces:

​​1. Video transmission of the Three Musketeers​

• ​​DVI interface​: It is equivalent to a highway, and can run 8 lanes at the same time. Now all high-end control cards support 1920Hz refresh rate [user information], and the screen will not be stuck when matched with this interface.
• ​​AV lotus head​: Just like a country road, although it can still be used, the picture quality will be reduced. But the advantage lies in the cheapness, the small shop's hand-written screen is still used
• ​​S terminal​: This is an outdated internet celebrity, and it is mainly used on old equipment

​2. Control signal line​

• ​Network cable interface​: The new favorite now, you can control the large screen 30 meters away
• ​RS232 serial port​: The true love of old-school technicians, although the transmission is slow but the stability is first-class

​3. Power artery​
Pay attention to the color of the interface! Red is generally the main power supply (the outdoor screen must be connected to 380V), and black is the backup power supply. I have a cold knowledge - now all high-end floor tiles have smart power distribution, which can automatically switch power [user information].

3. Selecting an interface is more sophisticated than finding a partner

A few days ago, a customer who opened a bar asked me: "Does there be more interfaces, the better?" This is as dangerous as asking "Does there be more girlfriends, the better?" Depend on actual needs:

​​Scene matching​

• Mall advertising screen: DVI+ network port is preferred, and it must support remote advertising replacement
• Stage rental screen: It must be equipped with a quick plug-in interface, and it must be disassembled and installed within 5 minutes.
• Stadium fence screen: Waterproof interface is a must, and it must work normally on rainy days

We added a silicone seal to the fence screen made in a stadium in Tokyo, and the interface area will still be output 4K screens in a stable manner during heavy rains [user information].

​​The transmission distance must be calculated​
Remember this formula: transmission distance = signal strength ÷ interference coefficient. Ordinary network cables can transmit 30 meters, and optical fibers can transmit 300 meters. If the distance is more than 50 meters, remember to install a signal amplifier.

4. Three taboos for installing interfaces

The most easiest pitfalls for beginners, I will list them and remember them:

1. ​​Don't let the interface "drink milk tea"​
   Even if the IP65 protection [user information] is marked, do not let the interface area face the air conditioner drain. Previously, a customer installed the screen directly above the milk tea shop operating table, and the interface was rusted after half a year.

2. ​​Plug and unplug should be a "feeling of ceremony"​
   The plug-in and unplug are comparable to the "breakup cannon", and no matter how loving the interface is, it cannot withstand such tossing. The correct way is to turn off the power first → wait for 10 seconds → unplug the wire.

3. ​Regular "physical examination" must not be missed​
   It is recommended to do interface maintenance every month:

• Use a brush to clean dust
• Use a cotton swab to dip it in alcohol to wipe the contacts
• Check if the screws are loose

Personal opinion time

After working in the display industry for so many years, I found an interesting phenomenon - the more advanced the interface technology, the simpler the operation. Just like today's smartphones, although the chips are complicated, they can be fools when used.

Those manufacturers who are obsessed with the number of interfaces are like chefs who only know how to pile up materials. A true expert can solve complex needs with the simplest interface solution. Just like the transparent window screen we made for a Korean department store, we use the original composite interface to make power, signal and control three-in-one, saving 60% of the installation time [user information].

Finally, let’s say the heart-wrenching words: the interface is like the "Ren and Du meridians" of the display screen. Only by finding the right position and using the right method can the entire screen be "live". Next time, I will see the small holes on the back, so don’t be scared again!

for more product information and pricing, please contact us .