1. Commercial space: Secrets hidden in billboards

Alas, did you hold the remote control and press the big screen wildly, but you found that there was no response at all? I've seen this a lot! actually​ ​The control end of the outdoor advertising screen is usually hidden in three places​​：

1. ​​Bottom maintenance port​ ​: 90% of the column screens are hidden here with main power gate and signal receiver
2. ​​Side rainproof box​ ​: Like the advertising screen of the bus stop, the control panel is hidden in the iron box with locks
3. ​​Cloud control​ ​: Now the new screen saves even physical switches, and you can remotely control it by scanning the code.

To give a real case - the naked 3D large screen in a shopping center suddenly turned black last year. The repairman searched for half an hour before touching the emergency switch behind the decorative panel 8 meters above the ground. So, you have to find the installation method first to find the switch!

2. Stage Equipment: The way the lighting engineer won’t tell you

Have you ever paid attention to the stage screen when watching the concert? The LED floor tiles screens that can follow the rhythm of music, their switches are much more complicated than those at home:

• ​​Main console dark space​ ​: The switches of the professional performance screen are integrated into the third-layer drawer of the dimming platform
• ​​Box snap position​ ​: The emergency switch of the rental screen is hidden under the magnetic cover plate of the splicing seam
• ​​Intelligent sensing system​ ​: This year's new dance floor screen will automatically wake up as soon as you stand up

When I was back to provide technical support for the music festival, I encountered a strange situation - the DJ sprinkled champagne on the control panel, and the entire floor screen flashed randomly. Finally, we forced the backup switch from the back of the screen to save the scene. So,​ ​At critical moments, you have to rely on physical switches to save your life​​！

3. Sports venue: an institution hidden in the auditorium

The switch position of the stadium fence screen is the most test of IQ! What do you think? In a midfield show in a football league last year, the staff searched for 15 minutes but couldn't find the switch:

1. ​​Distribution room concealed door​ ​: 80% of the total control of the stadium screen is hidden in the power distribution cabinet in the player channel
2. ​​Column hollow layer​ ​: The dispersed switch of the fence screen is usually set every 5 meters.
3. ​​Intelligent central control system​ ​: The screen that supports APP control, the switch has long been digitalized

Experienced old installers know a trick - push back along the screen track tube, and you can find the control end. However, the new screen is even more amazing now, and you can directly wake up the voice: "Hey, open the screen! "This voice-controlled switch is much more fashionable than a physical button!

4. Technical trend: When the switch disappears and is in progress

Having said that, did you find out? Nowadays, LED displays are becoming more and more "invisible":

• ​​Gesture control​ ​: Waving your hand can wake up the window advertising screen
• ​​Environmental sensing​ ​: The smart shopping guide screen in the mall, the person close to 3 meters will automatically light up
• ​​Brain wave interaction​ ​: The black technology in the experiment can be activated after staring at the screen for 5 seconds

Last week I went to experience a new thing - a transparent screen installed in a glass curtain wall, and the switch could not be found at all. The staff member smiled mysteriously, took out his cell phone and clicked a few times, and the entire wall lit up "swish". What a good guy, it turns out that the switch is hidden in the clouds!

​​Personal opinion​​
I want to tell you, finding LED display switches is like playing escape room - you have to understand the structure, look at the details, and be a little arduous. However, with the popularity of intelligent control, we will probably have to get used to "no switch" operations in another two years!

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