The LED display is a perfect combination of technology and media. It can fully show the concepts of dreams, technology, trends, and fashion, and can become a new force of stage beauty. Indoor and outdoor advertising forms continue to appear, from traditional LED billboards, to monochromatic word screens, to today's full-color LED displays. With the development of the LED display industry, outdoor media advertising forms have become more and more trendy and fashionable.
At present, most of the KTV bars, hotels, etc. are installed with indoor high-definition LED displays, while outdoor LED displays have already accounted for 80 percent of the outdoor media advertising field, becoming a new carrier of large-scale outdoor media advertising. Below we will take stock of several common wireless control LED display methods.
led display
01: RF wireless control
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. It has the characteristics of convenient installation and debugging, data transmission distance of up to 300-1000 meters, and no cost for later use.
Required equipment and price, RF sending and receiving module, about 350 yuan for a pair. Support one-to-many sending, that is, one sending module to multiple receiving modules. Disadvantages: There are not many radio frequency bands allowed by the country. This batch of 433MHZ is extremely susceptible to signal interference, and the transmission rate of this method is not very low. The baud rate can only be used at 4800 or 9600, which is not recommended.
02: WIFI wireless control
By installing a wireless router or other wireless equipment to bridge the user's original wireless network and build 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 and price, network bridge, within 800 yuan; wireless router (apply on the display screen is best to choose a device with a replaceable antenna, so that you can effectively receive wireless signals), the price is about 100 yuan
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. You only need to bridge the wireless router connected to the control card in the display to your wireless network, and you can use any computer in the intranet The upper control screen is up.
Indoor HD LED display
03: GPRS wireless control
After the GPRS module is powered on, it completes the process of dial-up Internet access and connects to the data center server. The client accesses the server through the client software, and the server forwards the information.
Features: Easy installation and debugging, no distance limit, as long as there is a cell phone signal, you can receive information, and the price is relatively cheap, generally in the range of 200-400 yuan.
Disadvantages: The GPRS module needs to install a mobile phone card for dial-up Internet access, which will incur a certain amount of data per month (for example, a minimum data package of 5 yuan for China Mobile can meet the demand). Limited by the GPRS bandwidth, the transmission rate is slightly slower, so it is more suitable for single and dual-color led display screens that mainly play text.
04: 3G (WCDMA) wireless control
The 3G module is also connected to the data center server through the wireless network, and the customer directly logs on to the Global Unicast cloud platform to release the program, which is directly sent to the control card by the server.
Features: The WCDMA signal is stable, and there is basically no data loss during the program transmission process. Compared with GPRS, the speed is faster, and pictures or videos can be transmitted. It is more suitable for full-color screens.
Disadvantages: China Unicom's signal coverage is not as high as China Mobile, and it may not be possible to connect to the Internet in some remote areas.
05: 4G, 5G full Netcom wireless control
Basically the same as 3G/GPRS. 4G, 5G full Netcom (supported by all series of China Mobile, China Unicom, and China Telecom), has the characteristics of fast transmission rate, full realization of real-time control, and instant response to related control when sending commands. When the amount of data sent is relatively large, the data cost is relatively large, and it is recommended to open a data package.
