Previous LED large screen LED display unit surface usually does not add additional supporting device, but as the technology matures, extend the service life and improve the display consider the effect, more and more auxiliary device designed to launch, this paper on the LED display unit packaging insulation layer and outdoor anti light grille cover also improved the design of LED large screen from the.
Due to the complex and changeable environment, LED large screen inevitably will affected by external factors, in order to ensure the stable operation for a long time, the common protective measures, waterproof, anticorrosive, lightning, wind, moisture resistance, frost resistance, anti - static. According to the relevant provisions of the home standards, outdoor LED large screen enclosure protection is divided into 3 levels, in which the A level is the lowest, the highest level of C.
Which IP66 said: dust density (not allowed to enter into any dust), a strong water spray (to the shell of the direction of a strong spray without harmful). Evidently, only in a dustproof and waterproof, on-site assembly of LED large screen obviously exists many defects and problems, according to requirements of C grade standard, LED large screen display unit module is necessary using closed unit box body structure, and the use of encapsulated insulating material encapsulation of the circuit board surface and the surrounding, thus maximize will the circuit board and the LED luminous tube and isolated from the external environment, to avoid all kinds of corrosive substances on the screen body harm.
Therefore, in order to meet the requirements of GB IP66, for display unit waterproof dustproof design, the scheme is on the circuit board between the perfused surface layer completely covers the circuit board surface and a circuit board, circuit board and the unit between the box package all gaps and led lower 2 / 3 of the insulating layer. The packaging of the insulation layer is two-component room temperature curing epoxy resin potting material, can make the LED large screen display unit front only led luminous surface in contact with the external environment, thus greatly strengthen electronic devices of integrity, improve the ability of external impact, vibration resistance ability; improve element, a circuit between the insulation performance; avoid element and the circuit is directly exposed to the external environment; improve its waterproof, moisture-proof etc..
Anti light grille cover
On the other hand, LED pixel surface did not any shading device, in sun or other external light irradiation, there will be more obvious reflection phenomenon, resulting in LED large screen contrast decreased, directly affect the display effect.
So each LED circuit module shall be installed (light) grille cover shading. Grille cover is composed of a substrate and grille, led positioning holes in one-to-one correspondence with the LED circuit module LED pixel unit substrate, grill is located in LED positioning holes along, also with the substrate into angle theta. In this way, the light from the direction of sunlight over, can effectively reduce the interference of LED pixels, reduce the impact of reflective, so as to improve the big screen contrast. In order to improve the display effect.