Most of the high-definition LED displays produced by LED display manufacturers use synchronous control, while a small number use asynchronous control. The so-called synchronous control refers to the connection between the computer and the screen. If the computer is turned off, the screen will also stop working, and whatever content is displayed on the computer will be displayed on the screen. But not all places are suitable for controlling large screen playback with a computer, so other devices need to be used for control. So, how does the wireless control of LED electronic large screens on mobile phones work?
With smartphones becoming increasingly intelligent, almost everyone will have a smartphone, and smartphones can perform most of the functions of a computer. Since mobile phones can perform most of the functions of computers, they can also control large screen playback. Generally speaking, mobile phones and iPads can be controlled through four methods: WIFI wireless control, RF wireless control, GPRS wireless control, and 4G full network wireless control. Moreover, mobile phones can be carried around and the playback content of high-definition LED displays can be changed at any time, which is more convenient and fast than computers. However, there are also some drawbacks, which will be briefly introduced by the manufacturer of Huaxintong Optoelectronics LED displays.
1. Methods for wireless control of mobile phones and iPads
1.1 WIFI wireless control
Remote wireless control of the large screen using a mobile phone and iPad can be achieved through touch control without any lag. Its working principle is to bridge with the user's existing wireless network by installing wireless routers or other wireless devices, build a wireless local area network, and facilitate the integration of network control cards into the wireless network for wireless network control. Its advantage lies in the absence of wiring, convenient and fast installation and debugging, and fast data transmission speed. The required equipment is a bridge, which is a wireless router.
The disadvantage is that the communication distance is limited, the bridge gain capability is different, and the communication distance of wireless routing is also different. If it is a partition wall, the signal will be weakened or even no signal. Therefore, it is only applicable to places with short distances and wireless signals. If the display area itself has wireless signal coverage, simply bridge the high-definition LED display screen and the wireless router connected to the control card to the wireless network, and then you can control the large screen through any computer or mobile phone.
1.2 RF wireless control
The working principle of RF wireless control is to connect one end of the RF module to the control computer and the other end to the serial port of the control card. The computer needs to install a driver program to generate a virtual serial port and send data through the serial port.
1.3 GPRS wireless control
The working principle of GPRS wireless control is to complete the process of dial-up internet access after adding the GPRS module, and then connect to the server in the data center. Customers can access the server through client software and the server forwards information.
1.4 4G full network wireless control
The working principle of 4G full network wireless control is basically the same as that of 3G/GPRS. 4G full network is supported by China Mobile, China Unicom, and China Telecom, with fast transmission speed and real-time control. Sending instructions can instantly respond to relevant controls.
2. Functions controlled by mobile phone and iPad
2.1 Visual Preview and Visualization Operations
Using mobile phones and iPads to control can achieve visual representation of any function, with simple, convenient, and fast operation. Before switching, you can preview the upcoming content to prevent accidental operation and ensure safety and reliability. Users can remotely control screen brightness, volume, etc. with just one click based on their on-site situation, and these operations will not affect the current screen usage without exiting the current playback mode.
2.2 Support List Editing
Customers can classify, list, cultivate files, and pre monitor programs at any time, and videos can be set to single loop or list loop.
2.3 Support one click switching between picture in picture, four screen, and nine screen modes
Single screen playback mode and picture in picture, can support four sub screen playback, zoom in and out, four screen and nine screen can be switched freely, with zero second delay. In multi screen mode, you can double-click any screen to switch between full screen and window.
2.4 Support for playing office files such as PPT and Word
Wireless screen mirroring can support playback of office files such as PPT and Word, seamless switching, as well as playback of videos and images. It supports placing multiple windows independently of each other for one file, thus pre monitoring the next screen and ensuring security.
2.5 Synchronized subtitle editing, supporting synchronous and asynchronous recording
During use, users can synchronously edit letters and record videos with just one click. It supports synchronous recording and a single recording, and the recorded files can be exported.
2.6 Supports multi screen synchronization
This system can support controlling multiple screens with one device. By switching, the playback content of each display screen can be controlled separately, and multiple screens can be synchronously controlled.
2.7 Other functions
Power off playback: Even if the iPad is turned off, the screen will still play in its original mode without going black;
External devices: support cameras DV、 DVD players, laptops, and other devices have direct signal connection and can synchronize pre monitoring live broadcast screens with one click switching.
3. Combination solution of mobile phone and iPad to control LED display screen
The combination scheme of the main control secret box, LED video processor, and WIFI can also be replaced with a Xiaomi box. Taking the main control secret box as an example:
3.1 Main functions implemented
Use the mobile phone (Android, Apple) system to control the LED display screen to play content from the phone, including regular images, videos, etc.
3.2 Required functional equipment:
1) One Android/Apple system phone
2) One main control secret box
3) One wireless router (Internet connection required)
4) One set of LED display screen
5) LED video processor - supports HDMI or related HDMI conversion cables (the main control box is an HDMI interface)
3.3 Connection and preparation for playing files that need to be completed by the device before control:
1) Firstly, connect and debug the LED display screen and LED video processor normally
2) Connect the HDMI output of the main control secret box to the LED video processor and make the corresponding settings
3) Turn on the wireless router and connect both the phone and the main control box to the same WIFI network
4) Install a corresponding version of the LED control system on the phone according to the system, and connect it to the control box through settings
And backup the content that needs to be played on the LED stage screen to the phone in advance
3.4 Specific operating procedures:
1) By using the main control system, you can directly send videos or photos from your phone or shared computer to the main control box by swiping up. Once received, the main control box will play the video or image files you have customized
2) You can also play various videos on the Internet through the main control box
