Oh, old guys! Do you often get confused when you first come into contact with LED screens? A friend who opened the gym asked me two days ago: "Where is the switch for this LED large screen hidden? "Today we will break it apart and talk about this matter. We will ensure that you will become a "switch expert" after reading it!

1. First understand: What does the LED screen switch look like?

This thing is not as simple as a light switch at home! Common​ ​Three switch types​​You'll get a clear distinction:

1. ​​Physical keys​​: Usually on the side or bottom of the screen, there is a metal button with an LED indicator light, which is the type that "click" when pressed.
2. ​​Remote Control Switch​​: It looks like a remote control of the air conditioner, and the button with the power supply logo is
3. ​​Software control​​: There is a conspicuous power icon in the control software on the computer or mobile phone

To give a real case: Last year, a three-story LED wall was installed in a commercial center, but the staff searched for half an hour before touching the switch in the steel frame mezzanine-this is​​The importance of confirming the switch position in advance​​！

2. Switch hiding places in different scenarios

Based on the pitfalls I have struck over the years, I will give you the key points:

1. ​​Outdoor advertising screen​​
   The switch is usually in the access door behind the screen. Some high-end models (such as stadium fence screens with IP65 protection) will be waterproofed. You have to unscrew the protective cover before you can see it.

2. ​​Rental screen​​
   What is important is speed! The switch is directly on the side of the box, and the power can be cut off when disassembly and assemble quickly. I heard that there is a manufacturer's aluminum magnesium zinc box, the switch also has fingerprint lock, and the safety factor is full.

3. ​​Transparent window screen​​
   This kind of high-end route, the switch may be hidden in the border decorative strips. Last week, I went to the electrical appliance mall. During the shopping guide's demonstration, I gently pushed the glass frame and the switch in the dark grid popped up - this design is indeed clever!

3. Three major iron rules for switching operation

Don't think that just pressing a button is done! Remember this​ ​Three rules for saving lives​​：

1. ​​The order cannot be wrong​​
   Open screen: Start the computer/controller first, then turn on the screen power supply
   Turn off the screen: Turn off the screen power first, then turn off the control device
   (There is a milk tea shop owner who operated the opposite operation, but he burned 3 driver boards, and the maintenance fee was enough to buy a new screen)

2. ​​Five minutes apart​​
   The switch is operated for at least 5 minutes and the capacitor is completely discharged. The most powerful operation I have ever seen is to turn on three times in 10 seconds, and directly smoke the power module.

3. ​​Keep a close eye on the status​​
   Never turn on and off the power when the screen is fully white or out of control! At this time, the current impact is the greatest, so that the lamp beads can be retired early in every minute

4. Common Deadly Operation Awards

Teach a lesson from blood and tears, friends:

• ​​Case 1​​: A gym boss tried to save trouble and directly connected the switch to the main gate. As a result, every time the switch is pulled, there is a "bang" and the fuse is changed five times in three months.
• ​​Case 2​​: The wedding company used a remote control switch, but the naughty child pressed randomly, causing the screen to splash, almost ruining the wedding of the newlyweds
• ​​Case 3​​: The shopping mall cleaning lady accidentally touched the hidden switch when wiping the screen, resulting in 2 hours of interruption in the live broadcast and losing six-digit orders

These painful experiences tell us:​​Switch management must be carried out​​! It is recommended to put warning signs on the switch and install physical locks directly in important places.

5. High-end gameplay: Intelligent power management

Now cutting-edge technologies no longer need to switch manually! for example:

1. ​​Light-sensing linkage​​
   The screen brightness is automatically adjusted with the environment, and when it reaches the setting value, it will enter standby mode directly
2. ​​Remote control​​
   You can turn on and off the phone through the mobile APP, and you can also view the current and voltage data in real time
3. ​​Intelligent timing​​
   Preset switching time, for example, the mall screen automatically turns on at 9 a.m. every day and closes on time at 10 p.m.

I heard that a manufacturer's 24-hour response system is even more amazing - when the screen is abnormal, it will automatically cut off power and push an alarm. The engineer will arrive with spare parts in 2 hours.

Personal opinion time

If I want to tell you, the switch design best shows the manufacturer's attentiveness. A good design should fit​ ​Three principles​​：

1. ​​Easy to reach but hard to touch​​: It should be convenient for operation and prevent accidents
2. ​​Status visualization​​: There must be a clear indicator light on the switch position
3. ​​Emergency measures​​: The power supply can be cut off quickly in case of emergencies

Recently I saw some manufacturers making switches with touch sensing + mechanical double insurance, and this design is quite reliable. But I won’t tell you which one is specific, so you can’t think I’m advertising (laughing). In short, remember one sentence:​ ​Switches are small, safety is big​​, don’t let this small detail ruin the entire screen!

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