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Technology丨How much do you know about common wireless control methods for LED displays?

116 views admin 2021-01-12

LED display is the perfect combination of technology and media. It can fully show the concept of dream, technology, trend and fashion, and it 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.

control methods for LED displays

Most of the current KTV bars, hotels, etc. are installed with indoor high-definition LED displays, while outdoor LED displays have accounted for 80% 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.

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 60 dollars 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.

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. The required equipment and price, network bridge, within 130 dollars; wireless router (it is best to choose a device with a replaceable antenna on the display screen, so that wireless signals can be effectively received), the price is about 16 dollars.

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 control card in the display to your wireless network, and you can use any computer on the intranet The control display is up.

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 38-68 dollars.

Disadvantages: The GPRS module needs to install a mobile phone card to dial-up Internet access, and a certain amount of traffic will be incurred every month. 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.

3G (WCDMA) wireless control

The 3G module is also connected to the data center server through a wireless network, and the customer directly logs on to the Global Unicast cloud platform to publish programs, which are 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. Compared with GPRS, the rate is faster, and pictures or videos can be transmitted. It is more suitable for full-color screens.

Disadvantages: It may not be possible to connect to the Internet in some remote areas.

4G, 5G full Netcom wireless control

Basically the same as 3G/GPRS. 4G, 5G full Netcom , has the characteristics of fast transmission rate, complete real-time control, and instant response to related controls when sending commands. In the case of a large amount of data sent, the data cost is relatively large, it is recommended to open a data package.

 

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