Do you encounter this often? The big screen in the mall suddenly started playing videos. People around them took out their phones and could directly project the screen, but you didn't even bring a data cable? Or a colleague in the conference room threw the computer screen onto the LED wall in two swishes, and are you still competing with the adapter? Today we will talk about this magical function-​LED wireless screen projection​Where is hidden?

Let’s give you a reassurance to all newbies. The LED displays on the market now, as long as they are not particularly old models, basically contain this "super power". But just like the hidden function in your phone, you have to know how to wake it up. Recently, there is a hot topic called "How newbies can quickly get started with LED wireless screen projection", which hits the pain points of many people.

1. Three ways to open wireless screen projection

​1. Direct connection mode of mobile phone​
Just like giving TVs and WiFi, the current LED screens have built-in wireless modules. For example, for those large screens that can interact in the mall, if you open the WiFi list on your mobile phone, you will find an exclusive hot spot of "LED-Display_XXXX", which can directly transmit pictures and videos by connecting. This operation is particularly suitable for temporary display, such as clothing store shopping guides to show customers the effect of outfits.

​2. LAN transmission​
A commonly used solution in corporate conference rooms requires binding devices on the router in advance. At this time, you will find that there is an icon of "conference large screen" in the screen projection option, which supports connecting 8 devices at the same time. The key point is -​This mode can transmit 4K screens without lag​, much better than many home projectors.

​3. Cloud control​
The darkest technology method can be controlled as long as there is a network. Imagine that you can modify PPT at home, and after the modification, you can directly push it to the company's LED screen to automatically update it. However, this requires installing a control software in advance, just like installing a "remote control" on the display.

2. Three major questions in actual use

​​Q1: Will there be delays in wireless screen projection?​​
It depends on the equipment configuration. A good LED screen will use a dual-band WiFi module (2.4G+5G), just like there are more lanes on the expressway. The actual data shows:

• Document demonstration delay <0.3 seconds
• 1080P video delay is about 0.8 seconds
• It is recommended to use wired screen projection

​​Q2: Can Apple and Android be used?​​
The current solutions are basically compatible. Apple uses AirPlay and Android uses Miracast, just like Mandarin and dialect automatic translation. Some high-end screens also support HDCP protocol, which can broadcast copyrighted film sources such as Netflix.

​​Q3: How many devices can you connect to at most?​​
3-5 units in normal mode, professional-grade equipment can be displayed on the same screen. Have a cold knowledge—​The device switching speed is faster than the remote control switch​, when shopping guides are engaged in promotions in shopping malls, they are rushing to cast screens like they are scrambling for mic.

3. Operation guide to avoid pits (real-person actual beta version)

Last week, I went to a friend's company to help with debugging and saw with my own eyes the common mistakes that novices make:

1. Forgot to turn off the hot spot of your phone, but it was too late for a long time
2. Use the display screen as a router, and 20 people can directly crash when connected to the Internet at the same time
3. The resolution is locked at 720P if the firmware is not updated.

Here is a trick to teach you -​Remember three sets of numbers​：

• 1920×1080@60Hz (conference demonstration gold parameters)
• 3840×2160@30Hz (must-have settings for 4K chip sources)
• 1280×720@120Hz (exclusive mode for gaming screen projection)

If you encounter tear or color distortion, check whether these three values ​​are accurate first. Many problems actually lie in this, and they have little to do with the quality of the display itself.

4. The ultimate comparison of wireless vs wired

There is a real case: Last year, the speaker suddenly had to adjust the data in the middle of the talk, and the assistant directly used his mobile phone to continue the investment, and the audience did not see the flaws throughout the whole process. This flexibility is simply impossible to do with wired connections.

Now you should understand? Those wireless projectors that look tall and high-end, to put it bluntly, they install "invisible data cables" on the display screen. Next time I see the big screen in the mall, you might as well take out your phone and try the WiFi list, maybe you can unlock the new gameplay. By the way, remember to chooseDual-band transmissionandIntelligent anti-interference​Functional devices, after all, there are 2.4G signals everywhere. If the frequency band is in conflict with the wireless keyboard and mouse, the screen will be "traffic jam".

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