first, the display screen is installed outdoors, often in the sun and rain, and the working environment is bad. if the led screen electronic equipment is wet or seriously damped, it will cause short circuit or even fire, which will lead to failure or even fire, resulting in losses. secondly, the display screen may be attacked by strong electric and magnetic fields caused by lightning.
3. environmental temperature varies greatly. if the ambient temperature is too high and the heat dissipation is not good, the integrated circuit may work abnormally or even be burnt down, which makes the display system unable to work properly.
4. wide audience, long visual distance and wide visual field; great changes in ambient light, especially possibly direct sunlight.
in view of the above special requirements, outdoor display must achieve:
first, the led video screen body and the joint of the screen body and the building must be strictly waterproof and leak-proof; the screen body should have good drainage measures, once water accumulation occurs, it can be discharged smoothly;
installation of lightning arresters on display screens and buildings. the main body and shell of the display screen are well grounded, and the grounding resistance is less than 3 ohms, so that the high current caused by lightning can be released in time.
3. install ventilation equipment to cool down, so that the internal temperature of the screen body is between – 10 ~40 c. axial fan is installed behind and above the screen body to discharge heat.
4. select industrial ic chips with working temperature ranging from – 40 c to 80 c to prevent low temperature in winter from making the display screen unable to start. ;
5. in order to ensure long-distance visibility under strong ambient light, ultra-high brightness light emitting diodes must be selected.
6. the display medium adopts a new type of wide-angle tube with wide-angle of view, pure color and uniform coordination, with a life span of more than 100,000 hours. the outer packaging of display medium is the most popular square cylinder with shielding edge, silica gel sealed, non-metallized assembly. its appearance is exquisite and beautiful, durable, with the characteristics of direct sunshine, dust, waterproof, high temperature and short circuit protection.
