Detailed Explanation of Common Wireless Control Inventory of LED Display Screen You Don't Know

LED display screen is the perfect combination of science and technology and media. It can fully display the ideas of dream, science and technology, trend and fashion. It can fully become a new force of dance beauty. New indoor large-scale screens and outdoor advertising forms continue to appear, from traditional LED billboards to monochrome character screens to today's full-color LED display screens. With the development of LED industry, outdoor media advertising has become more and more fashionable. At present, most KTV bars and hotels are equipped with indoor HD display screens, and outdoor LED display screens have occupied 80% of the field of outdoor media advertising, becoming a new carrier of large-scale outdoor media advertising. Let's take stock of several common wireless control LED display modes.

Common wireless control inventory of LED display screen you don't know

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 installing the driver, the computer generates a virtual serial port and sends data through this serial port.

Features: easy installation and debugging, data transmission distance up to 300-1000m, no cost for later use.

Required equipment and price: RF transmitting and receiving module, about 350 yuan 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 for civil use by the state. The batch of 433MHz is extremely vulnerable to signal interference, and the transmission rate in this way is not very low. The baud rate can only be 4800 or 9600, which is not recommended.

Working principle: by adding a wireless router or other wireless equipment, bridge with the user's original wireless network, build a wireless LAN, and easily integrate the network control card into the wireless network for wireless network control.

Features: no wiring, convenient installation and debugging, fast data transmission speed.

Required equipment and price: bridge, within 800 yuan; Wireless router (it is better to select the equipment with changeable antenna for application on the display screen, so as to effectively receive the wireless signal), the price is about 100 yuan

Disadvantages: the communication distance mainly depends on the gain capacity of the bridge. The communication distance of wireless route is relatively short, and the partition signal is relatively weak or no signal. It is suitable for places with wireless signals in short distance. If there is wireless signal coverage in the area where your display screen is located, it is even simpler. Just bridge the wireless router connected to the control card in the display screen to your wireless network, and you can control the display screen on any computer in the intranet.

Working principle: after the GPRS module is powered on, it completes the process of dial-up Internet access and connects to the data center server. The customer accesses the server through the client software, and the server forwards information.

Features: convenient installation and debugging, no distance limit, as long as there is a mobile phone signal, you can receive information, and the price is relatively cheap, generally in the range of 200 400 yuan.

Disadvantages: GPRS module needs to install a mobile phone card to dial up internet access, which will generate a certain traffic fee every month (for example, China Mobile's minimum traffic package of 5 yuan can meet the demand). Due to the limitation of GPRS bandwidth, the transmission rate is slightly slow, so it is more suitable for LED display screen with single and dual color and mainly playing text.

Working principle: the 3G module is also connected to the data center server through the wireless network. The customer directly logs in to the global simulcast cloud platform to publish programs, and the server directly sends them to the control card.

Features: the WCDMA signal is stable, and there is basically no data loss in the process of program transmission. Compared with GPRS, the speed is faster. It can transmit pictures or videos, which is more suitable for full-color screen.

Disadvantages: the signal coverage of China Unicom is not as high as that of China Mobile, and there may be no networking in some remote areas.

Working principle: basically the same as 3G / GPRS.

Features: 4G all Netcom (supported by China Mobile, China Unicom and China Telecom), with fast transmission rate, complete real-time control, and instant response to relevant control when sending instructions.

Disadvantages: when the amount of data sent is relatively large, the traffic cost is relatively large. It is recommended to open the traffic package.

Detailed Explanation of Common Wireless Control Inventory of LED Display Screen You Don't Know 1

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How Can the Heat Dissipation of LED Display Screen Be Improved
In practical application, improving the heat dissipation of LED display screen can not only effectively improve the efficiency of heat dissipation of LED display screen, but also save power, which is more conducive to improving the service life of LED display screen.1. It is a common method to use a long-life and high-efficiency fan to strengthen heat dissipation inside the lamp shell. This method has low cost and good effect.2. Aluminum cooling fins are the most common way of heat dissipation. Aluminum cooling fins are used as part of the shell to increase the heat dissipation area.3. Aerodynamics, using the shape of the lamp shell to produce convective air, which is the lowest cost method to strengthen heat dissipation.4. Surface radiation heat dissipation treatment: the surface of the lamp shell is treated with radiation heat dissipation. The simpler thing is to apply radiation heat dissipation paint, which can bring the heat away from the surface of the lamp shell by radiation.5. Integration of heat conduction and heat dissipation -- the application of high heat conduction ceramics. The purpose of heat dissipation of lamp shell is to reduce the working temperature of LED HD display chip. Because the expansion coefficient of LED chip is very different from that of our common metal heat conduction and heat dissipation materials, the LED chip cannot be directly welded to avoid high and low temperature thermal stress damaging the chip of LED display.6. The heat conduction tube is used for heat dissipation, and the heat is guided from the LED display chip to the shell heat dissipation fin by using the heat conduction tube technology.7. The thermal conductive plastic shell is filled with thermal conductive materials during injection molding of the plastic shell, so as to increase the thermal conductivity and heat dissipation capacity of the plastic shell.It can be seen that the maturity and progress of LED display heat dissipation technology will be conducive to its concept of saving and environmental protection. LED electronic display manufacturers have a variety of methods to improve the heat dissipation of LED display in the production of LED display. There will be different considerations according to the power and place of use.
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