In response to the development of the times, mobile phones and ipads are now equipped with more and more computer functions, that is, online office can be realized on mobile phones and ipads. Since mobile phones and Ipads can realize most of the functions of computers, it is not a problem to use mobile phones and ipads to control the led display. Then how do they control the led display? What is the principle? Let Winbond Optoelectronics give you the analysis below. .
In fact, one of the most important reasons for the mobile phone and ipad to control the led display is to connect these devices, then do the mobile phone and ipad need a network cable to connect like a computer? The answer is no, just use WIFI to connect.
led display
1. Several methods of controlling led display screen by mobile phone and ipad
1.1, WIFI wireless control
The system uses the mobile terminal (mobile phone, IPAD) as the control terminal to realize the remote wireless control screen for the first time. All of its functions can be realized by touch screen control, with zero-second switching without freezing. Really abandon the traditional keyboard and mouse, and replace the hardware with software.
Working principle: By installing a wireless router or other wireless equipment, bridging with the user's original wireless network, building a wireless local area network, it is convenient to integrate the network control card into the wireless network for wireless network control.
Features: No wiring required, easy installation and debugging, and fast data transmission.
Required equipment: network bridge, wireless router (it is best to choose a device with a replaceable antenna on the display screen, so that the wireless signal can be effectively received).
Disadvantages: The communication distance mainly depends on the gain ability of the 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 wireless signals in short distances. If the area where your display is located already has wireless signal coverage, it is even simpler. Just bridge the wireless router connected to the led display control card in the led display to your wireless network, and you can get the intranet The display screen is controlled 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 serial port of the control card. After the computer installs the driver, 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 dial-up Internet access, connects to the data center server, and 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 all series of China Mobile, China Unicom, and China Telecom), fast transmission rate, fully realized real-time control, sending commands can instantly respond to related controls.
2. Several functions of the mobile phone and ipad to control the led display
2.1. Graphical preview, visualized operation
Use the IPAD to control the screen, and any function can be visualized at a glance. If you can play with your mobile phone or iPad, you can control the large LED screen! Before switching, you can even preview the content to be played, which prevents misoperation to the greatest extent, and is safe and reliable!
2.2. Adjust brightness and volume arbitrarily with one button
According to the actual situation on site, customers can remotely control the brightness (from the brightest to the black screen) and volume of the screen at any time on the iPad, which is simple and convenient. The most important thing is that any operation will not affect the use of the current screen, and there is no need to exit the current playback!
2.3. Support list editing
Before or during use, customers can classify files, sort lists, increase or decrease files, and pre-monitor the broadcast programs at any time. You can set single loop or list loop when playing video.
2.4. Picture-in-picture, four-screen, nine-screen one-key switch
Single-screen playback mode and picture-in-picture (supports up to four sub-screens, the sub-screens can be dragged and zoomed in), four-screens, and nine-screens, which can be switched with one key, with zero second delay and no freeze; in multi-screen mode, double-click any of them The screen can be switched between full screen and window (audio synchronization).
2.5, support PPT, Word and other Office files to play
In addition to the above functions, the wireless control screen system also supports normal playback of Office files (including PPT animation), seamless switching between Office files, and seamless switching with videos (that is, it can support larger video files without stuck Pause). A file can be placed in multiple windows, independent of each other, so as to preview the next screen and ensure safety.
2.6, can edit subtitles synchronously, support synchronous and asynchronous recording
In the process of use, users can edit letters synchronously, record and record with one key, support synchronous recording and one recording, and the recorded files can be exported.
2.7, support multi-screen synchronization
This system can support one to control multiple screens. By switching, the playback content of each display can be controlled separately, and multiple screens can be controlled synchronously.
2.8, other functions
Resume playback after power failure: Even if the iPad is turned off, the screen will still play in the original mode without black screen playback;
External equipment: Supports direct connection of signals from cameras, DVs, DVD players, laptops, etc., and can synchronize preview live images with one-key switching.
Third, the mobile phone and ipad combination solution to control the led display
(Use the main control secret box + LED video processor + WIFI) The main control secret box of the combination scheme can also be replaced with a Xiaomi box. The following main control secret box is taken as an example:
3.1 Mainly realized functions
Through the mobile phone (Android, Apple) system to control the led display screen to play the content in the mobile phone, the content includes conventional pictures, videos, etc.
3.2 Required functional equipment:
One Android/Apple mobile phone, one master secret box, one wireless router (need to connect to the Internet), a set of LED display, LED video processor-support HDMI or related HDMI conversion cable (the master secret box is HDMI interface).
3.3 The connection that the device needs to complete before control and the preparation for playing files:
First, connect the LED display and the LED video processor normally and complete the debugging; connect the HDMI output of the master control box to the LED video processor and make the corresponding settings; the wireless router turns on the wireless network, and connects the mobile phone and the master controller to the The box is connected to the same WIFI network at the same time; 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 backs up the content that needs to be played on the LED stage screen to the mobile phone in advance
3.4 Specific operation methods:
Through the master control system, you can directly send videos or photos in your mobile phone or shared computer to the master secret box by swiping up. The master secret box will directly play your customized video and picture files after receiving it; you can also use The main control secret box plays various videos on the Internet, etc.
