8 reasons why LED lights do not shine
1. The packaging protection of the LED flexible lamp strip is not perfect, which causes the lamp bead to be damaged by the impact during transportation.
2. The soldering point of the LED flexible lamp strip has a phenomenon of virtual soldering, and the vibration during the transportation causes the solder joint to fall off and the light strip is not bright.
3, LED flexible lamp with less solder, the solder joints are easy to fall off
4. The quality of the LED flexible lamp with solder is not good. The soldering point of the LED flexible lamp strip is prone to brittle cracking and falling off during the bending process.
5. When the LED flexible lamp strip is installed, the bending angle is too large, causing the LED flexible lamp to be separated from the copper foil and causing the light to be off.
6. The LED flexible lamp strip over-extrudes the product during installation, resulting in damage to the LED flexible lamp with the chip or the solder joint deformation and not brightening.
7. LED flexible lamp with circuit board solder mask is too thick, solder and circuit board can not be completely fused together during soldering, it is also a kind of virtual soldering phenomenon.
8. The LED flexible lamp strip can not be twisted during installation. If it is twisted, the solder joint of the LED flexible strip will fall off and cause no light.
How to identify the quality of LED strips:
LED lights have a mixed market, and the prices of regular manufacturers and cottage products vary widely. If you know the quality of LED strips from the technical point of view, I am afraid many customers do not have this ability. But we can make a preliminary identification from a simple appearance, and basically can distinguish the quality.
It can be identified mainly from the following aspects:
1. Look at the solder joints. The LED strips produced by the regular LED strip manufacturers are produced by solder paste and reflow soldering using the SMT chip process. Therefore, the solder joints on the LED strips are relatively smooth and the soldering amount is not large, and the solder joints extend in an arc shape from the FPC pads to the LED electrodes.
2. Look at the quality of FPC. FPC is divided into copper and rolled copper. The copper foil of the copper plate is convex. If you look at it, you can see it from the connection between the pad and the FPC. The rolled copper is closely integrated with the FPC and can be bent freely without peeling off the pad. If the copper plate is bent too much, the pad will fall off. If the temperature is too high during maintenance, the pad will fall off.
3. Look at the cleanliness of the surface of the LED strip. If the LED strips produced by the SMT process are used, the surface is very clean and does not see any impurities or stains. However, if the cottage version of the LED light strip produced by the hand soldering process, the surface will remain stained and cleaned regardless of how it is cleaned.
4. Look at the packaging. Regular LED strips will be packed in anti-static coils, usually 5 meters or 10 meters, and then sealed with anti-static moisture-proof bags. The cottage version of the LED light strip will use the recycling coil tray because of cost savings, and then there is no anti-static moisture-proof packaging bag. Look carefully at the coil tray to see the traces and scratches left when the label is removed.
5, look at the label. Regular LED lights with printed bags and reels will have printed labels instead of printed labels.
6, see the attachment. Regular LED strips will be accompanied by instructions for use and strips in the box, as well as LED strips with connectors or decks; the cottage version of the LED strips do not have these accessories in the box, because Some manufacturers can still save the province after all.
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