Outdoor display screen unit board and manufacturing method thereof

Abstract

The invention discloses an outdoor display screen unit board and a manufacturing method thereof, belonging to the technical field of semiconductor devices. The outdoor display screen unit board comprises a PCB (printed circuit board), a plurality of SMD (surface mount device) lamps and waterproof parts, wherein the SMD lamps are fixed to the PCB; each waterproof part is arranged on the external surface of each SMD lamp; each SMD lamp comprises one or a plurality of LED (light-emitting diode) chips, a sealing part and a pin; the sealing part is arranged around the LED chip; and the end of the pin extends to the outside of the sealing part, and is connected with the circuit on the PCB. The manufacturing method comprises the following steps: fixing, and adding the waterproof layer. The outdoor display screen unit board has the advantages of high quality, uniform color, simpler manufacturing requirements for outdoor SMD lamps, and much lower price and cost.

Description

technical field [0001] The invention relates to the field of semiconductor devices, in particular to an outdoor display unit board and a manufacturing method. Background technique [0002] At present, the outdoor display screens produced and sold on the market are gradually shifting from straight lamps to outdoor SMD (Surface Mounted Devices, Surface Mount Devices) lamps, especially outdoor screens with a dot spacing of 10mm (referred to as P10) and below P10. They are all developing towards SMD outdoor screens or COB (Chip On Board, chip on board) outdoor screens. Although the SMD outdoor screen has many technical advantages over the outdoor display screen of the straight lamp, its manufacturing cost is high, and it is easy to be affected by moisture, which leads to unstable performance such as dead lights, and its service life is not as good as that of the straight lamp. Since the glue filled with waterproof and moisture-proof is black glue, it can only cover half of the ...

AI Technical Summary

Problems solved by technology

Although the SMD outdoor screen has many technical advantages over the outdoor display screen of the straight lamp, its manufacturing cost is high and it is easy to be affected by moisture, which leads to unstable performance such as dead lights, and the service life is not as good as that of the straight lamp.

Since the glue filled with waterproof and moisture-proof is black glue, it can only cover half of the height of the SMD lamp, so the upper half of the SMD lamp is completely exposed. Therefore, this production method has high requirements for the SMD lamp. It requires manufacturing The material of the lamp can withstand the harsh test of outdoor sun and rain, and it can also withstand the test of high temperature sun and low temperature cold, so the manufacturing cost is high, and after a period of time, this kind of unit board will always be damaged. Some of the lamps will have water and moisture entering, resulting in dead lights, so the biggest problem with this kind of screen is to solve the waterproof and moisture-proof problem.

[0003] The COB outdoor screen has better moisture-proof performance than the SMD outdoor screen, so the performance is relatively stable and the service life is long, but its disadvantage is that the brightness is low. Compared with the SMD with the same brightness, a larger chip is used, so the price is also higher. , because COB production is to directly fix the chip on the PCB without a lamp cup, so its angle is large. In addition, COB directly fixes the chip on the PCB, so it has no way to split and split each pixel point. Color processing, so it is easy to cause problems of uneven color and inconsistent brightness

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