The development of the display screen has gone through five processes: a stable period-a development period-a high tide period-a low valley period-a mature period. The installation and use of LED displays in those first-tier cities are becoming more and more advanced, and there are more and more installation applications. , And the second-tier and third-tier cities are only preliminary penetration, the current LED display installation is mainly developed to the second and third-tier cities, the second and third-tier cities will become the main growth force of the LED display. It can be seen that the market development of second- and third-tier cities is the main direction of LED products.
The outdoor market will be a relatively large growth point for second- and third-tier cities. Outdoor LED displays are mainly used for outdoor advertising media, so they must be able to work normally in different climates. So, what problems should customers pay attention to when purchasing LED displays? The editor compiled a few common precautions for reference.
1. The main problems of outdoor screens are as follows: The screen is installed outdoors, often exposed to rain, wind and dust, and the working environment is harsh. Electronic equipment getting wet or severely damp can cause short circuit or even fire, cause malfunction or even fire, and cause loss.
2. The display screen may be attacked by strong electricity and magnetism caused by lightning.
3. The environment temperature changes greatly. When the display screen is working, it will generate a certain amount of heat. If the ambient temperature is too high and the heat dissipation is poor, the integrated circuit may not work properly, or even be burned, making the display system unable to work normally.
Fourth, the audience is wide, the viewing distance is long, and the field of view is wide; the ambient light changes greatly, especially if it is exposed to direct sunlight.
In response to the above special requirements, outdoor display screens must:
(1) Install ventilation equipment to cool down so that the internal temperature of the screen is between -10 degree and -40 degree . An axial fan is installed on the top of the back of the screen to dissipate heat.
(2) Use industrial-grade integrated circuit chips with a working temperature between -40 degree and 80 degree to prevent the display from starting up when the temperature is too low in winter.
(3) Install lightning protection devices on display screens and buildings. The main body of the display screen and the shell are kept well grounded, and the grounding resistance is less than 3 ohms, so that the large current caused by thunder and lightning can be discharged in time.
(4) The screen body and the joint between the screen body and the building must be strictly waterproof and leak-proof; the screen body must have good drainage measures, and once the accumulation of water occurs, it can be discharged smoothly.
(5) In order to ensure long-distance visibility in a strong environment, ultra-high-brightness light-emitting diodes must be selected.
(6) The display medium uses a new type of wide viewing angle tube, which has a wide viewing angle, pure color, consistent and coordinated, and a life span of more than 100,000 hours. The outer packaging of the display medium is currently the most popular rectangular tube with a cover, sealed with silicone, and assembled without metallization.
After the above treatment, in addition to its exquisite and beautiful appearance, sturdy and durable, outdoor LED displays also have the "five-proof" characteristics of protection from direct sunlight, dust, water, high temperature and short circuit.
