Is the LED indoor display an enhanced protection level?
Indoor LED display, the use of surface-mounted SMD display in the market is already a mainstream and mature product, among which small spacing is widely used in conference rooms, courts, public security bureaus, procuratorates, command centers, TV stations, etc. Widely distributed in shopping malls, restaurants, schools, public construction and other places.
For general indoor LED display screens, when the product is delivered, it is in the state of zero failure at the factory, but after a period of use, the lights will be broken, the lights will be on, and the lights will be lost due to inadvertent collisions; In the on-site environment, sometimes there will be unforeseen or unfavorable scenarios. For example, the influence of temperature difference caused by direct blowing from the air-conditioning outlet at a short distance will cause a large area of dead pixels, or the on-site environment will be too humid, which will cause damage to the screen. The point rate is increasing day by day.
For the indoor small-pitch industry that has passed the semi-annual inspection, how to solve the display problems caused by factors such as water vapor, dust, bumps, and broken lights, as well as improve product quality and reduce the burden and cost of after-sales service are current LED manufacturers. problem to be solved.
Therefore, in order to effectively solve the mentioned problems, so-called surface coating solutions were created.
Such a solution is based on the current indoor surface mount LED display, and the equipment can be directly combined with the current existing SMT surface mount production line.
The process is to cover the surface of the light board with a light board made by the (SMT) surface mount process after 72 hours of aging process to form a so-called protective layer, which can wrap the conductive pins and isolate them. Humidity, water vapor influence.
For LED display products with a general protection level of IP40 (IPXX, the front X is dustproof and the rear X is waterproof), it has the technology to effectively improve the protection level of the LED light surface, provide anti-knock effect, avoid the occurrence of light falling off, and reduce the dead pixels of the entire screen Rate (PPM) and other advantages, this type of solution has already responded to the market demand, the production is mature, and it will not increase the overall cost burden excessively.
Not only that, the protection process on the back of the printed circuit board (PCB) maintains the three-proof paint protection process used in the past. Generally, the spraying process can improve the protection level of the back of the circuit board. The surface is coated with a film to form a protective layer to prevent the failure of the integrated circuit components of the drive circuit.
For LED display modules used indoors, such a solution can effectively prevent problems such as failure points caused by moisture and dust by covering the exposed electrical conductive pins, and at the same time provide protection The effect of bumping, the surface coating solutions currently on the market include GOB display, AOB display, etc. Table 1 is the comparison with general SMD display.
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