How does a mobile device control the LED screen wirelessly?
Date: 2019-12-10
In order to respond to the development of the times, mobile phones and iPads now have more and more computer functions, that is, online work can be realized on mobile phones and iPads. Since mobile phones and iPads can achieve most of the computer's functions, it is no problem to use mobile phones and iPads to control the LED display. So how do they control the LED display and what is the principle?
In fact, one of the important reasons for mobile phones and ipads to control the LED display is to connect these devices. So, do mobile phones and ipads need a network cable like a computer to connect? The answer is no, just use WIFI to connect.
First, several methods of mobile phone and ipad control led display
1.1 WIFI wireless control
The system uses the mobile terminal (mobile phone, IPAD) as the control terminal, and realizes the remote wireless screen control for the first time. All its functions can be realized by the touch screen control, and the zero-second switching is not blocked. Really abandon the traditional keyboard, mouse, software instead of hardware.
Working principle: By installing a wireless router or other wireless equipment, bridging the user's original wireless network, setting up a wireless local area network, and conveniently integrating a network control card into the wireless network for wireless network control.
Features: No wiring, convenient installation and debugging, fast data transmission speed.
Equipment required: network bridge, wireless router (application on the display screen * is the device that selects the replaceable antenna, so that it can effectively receive wireless signals).
Disadvantages: The communication distance mainly depends on the gain capability of the network bridge. The communication distance of the wireless router is relatively short, and the signal of the partition wall is weak or no signal. It is suitable for places with short distance wireless signals. If there is wireless signal coverage in your display area, it is even simpler. You only need to bridge the wireless router connected to the LED display control card in the LED display to your wireless network, and you can access the internal network. Control the display on any computer.
1.2, RF wireless control
Working principle: One end of the RF module is connected to the control computer and the other end is connected to the control card serial port. After the driver is installed on the computer, a virtual serial port is generated and data is sent through this serial port.
1.3, GPRS wireless control
Working principle: After the GPRS module is powered on, it completes the process of dialing up to the Internet and connects to the data center server. The client accesses the server through the client software, and the server forwards the information.
1.4, 4G full Netcom wireless control
Working principle: Basically the same as 3G / GPRS.
Features: 4G full Netcom (supported by China Mobile, China Unicom and China Telecom), fast transmission rate, fully real-time control, and sending commands can instantly respond to related controls.
Second, several functions of mobile phone and ipad control led display
2.1 Graphical preview and visual operation
Use IPAD to control the screen, any function is imaged, at a glance, you can play mobile phones, iPad, you will control the LED screen! Before switching, you can preview the content to be played, the degree of prevention of misoperation, safe and reliable!
2.2. Brightness and volume can be adjusted with one button
According to the actual situation on the spot, customers can remotely control the brightness of the screen body (from * bright to black screen) and volume at any time on the iPad, which is simple and convenient. It is important that any operation will not affect the use of the current screen body, there is no need to exit the current playback!
2.3 Support list editing
Before or during use, customers can categorize files, sort lists, increase or decrease files, and pre-monitor the broadcast programs at any time. You can set a single loop or a list loop when playing a video.
2.4.Picture in picture, four pictures, nine pictures with one key switch
Single-picture playback mode and picture-in-picture (* supports four sub-pictures, which can be dragged and dropped in size), four-picture and nine-pictures, which can be switched with one key, zero-second delay without stalling; in multi-picture mode, double-click Arbitrary picture can switch between full screen and window (audio synchronization).
2.5, support for Office files playback such as PPT, Word
In addition to the above functions, the wireless screen control system also supports the normal playback of Office files (including PPT animations), seamless switching between Office files, and seamless switching with videos, etc. (that is, it can support large video files. Pause playback). A file can be placed in multiple windows, independent of each other, so as to preview the next screen and ensure security.
2.6, can edit subtitles synchronously, support synchronous and asynchronous recording
In the process of use, users can edit the letters synchronously, and one-click can record video. It supports synchronous video and one video, and the recorded files can be exported.
2.7, support multi-screen synchronization
This system can support one screen to control multiple screens. By switching, the playback content of each display can be controlled separately, and multiple screens can be controlled simultaneously.
2.8 Other functions
Power off and resume: Even if the iPad is turned off, the screen will still play according to the original mode without black screen playback;
External equipment: Supports direct connection of camera, DV, DVD player, notebook computer and other equipment signals, and can synchronize live preview pictures, which can be switched with one click.
Third, the combination of mobile phones and iPad control LED display
(Using the master control box + LED video processor + WIFI) Combination solution The master control box can also be replaced with a Xiaomi box. The following master control box is used as an example:
3.1 Main functions
The mobile phone (Android, Apple) system is used to control the LED display to play the content in the mobile phone, which contains conventional pictures, videos, and so on.
3.2 Required functional equipment:
1) One Android / Apple system phone
2) One master secret box
3) One wireless router (Internet connection required)
4) LED display set
5) LED video processor-support HDMI or related HDMI conversion cable (the main control secret box is the HDMI interface)
3.3 Before the control, the device needs to complete the connection and prepare the file for playback:
1) First connect the LED display and LED video processor normally and debug it
2) Connect the HDMI output of the main control box to the LED video processor and make the corresponding settings
3) The wireless router turns on the wireless network, and connects the mobile phone and the main control box to the same WIFI network at the same time
4) The mobile phone installs a corresponding version of the LED main control system according to the system, and connects to the main control secret box through settings
And back up the contents of the LED stage screen to the phone in advance
3.4 Specific operating methods:
1) Through the main control system, send the video or photo from the mobile phone or shared computer directly to the main control secret box through the stroke method. After receiving the main control secret box, you will directly play your customized video and picture files.
2) You can also play various videos on the Internet through the main control box.
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