2. There is a phenomenon of virtual welding in the solder joint of 2.LED flexible light strip, and the vibration during transportation causes the solder joint to fall off, resulting in the light strip not being bright.
3. The amount of solder in the 3.LED flexible light strip is small, and the solder joint is easy to fall off.
4. The solder quality of the LED flexible light bar is not good, and the solder joints of the LED flexible light bar are easy to crack and fall off when bending.
5. The bending angle of the LED flexible light strip is too large when it is installed, which causes the solder joint of the LED flexible light strip to be separated from the copper foil, resulting in dullness.
6. When installing the led flexible light bar, the product is excessively squeezed, resulting in the damage of the LED flexible light bar chip or the deformation and falling of the solder joint.
7. The solder mask of 7.LED flexible light bar circuit board is too thick, and the solder and circuit board can not be completely fused together during welding, which is also a virtual welding phenomenon.
8. The 8.LED flexible light bar cannot be twisted during installation. If twisted, the solder joint of the LED flexible light bar will fall off, resulting in dullness.
9. Electrostatic burning, because LED is an electrostatic sensitive element. Without proper electrostatic protection measures, the chip will burn out. The LED strip market is mixed, and the prices of regular manufacturers' products and cottage products are quite different. If we identify the quality of LED strip from the professional technology, I'm afraid many customers don't have this ability. But we can make a preliminary identification from the simple appearance, and basically we can see the quality.
Mainly from the following aspects to identify:
1, look at the solder joints. LED strip produced by a regular LED strip manufacturer is produced by SMT, solder paste and reflow soldering. Therefore, the solder joint on the LED lamp strip is smooth, and the amount of solder is not large, and the solder joint extends from the FPC pad to the LED electrode in an arc shape.
2. Look at the quality of FPC. FPC is divided into two types: copper clad copper and rolled copper. The copper foil coated with copper is prominent. If you look carefully, you can see it from the connection between the pad and FPC. Calendered copper is closely combined with FPC, which can be bent at will without dropping the pad. If the copper clad laminate is bent too much, the pad will fall off and the temperature will be too high during maintenance.
3. Look at the cleanliness of LED strip's surface. The surface cleanliness of LED strip produced by SMT technology is very good, and no impurities and stains can be seen. No matter how it is cleaned, there will be stains and cleaning marks on the surface of the fake LED strip produced by manual welding process.
4. Look at the packaging. Regular LED strip will be packed with anti-static reels, 5m or10m, and the outside of the package will be sealed with anti-static and moisture-proof bags. The fake version of LED strip uses recycling reels, and there is no anti-static and moisture-proof packaging bag. If you look at the scroll carefully, you can see the marks and scratches left when the label is removed.
5. Look at the label. Regular LED strip packaging bags and scrolls will have printed labels instead of printed labels.
6. Look at the attachment. Regular LED strip will attach instructions and specifications for the use of light strips in the box, and will also be equipped with LED strip connectors or card holders; These accessories are not available in the fake version of LED strip packaging box, because some manufacturers can save money after all. 1, different occasions, different products have different requirements for brightness. For example, in some large shopping malls, LED jewelry counter lights should be attractive with high brightness, and different products such as LED spotlights and LED colorful light bars should be used as decorations.
2. Anti-static ability: LED with strong anti-static ability has a long life, but the price will be higher. Generally speaking, the antistatic performance is better than 700 volts. ..
3. LEDs with the same wavelength and color temperature will have the same color. This large-scale combination of lamps is particularly important. The same lamp should not produce too much color difference.
4. The leakage current is the current when the LED conducts electricity reversely. We suggest using LED products with smaller leakage current.
5, waterproof ability, different requirements for outdoor and indoor LED lights.
6. The lighting angle of LED has a great influence on LED lamps, and many different lamps are needed. For example, for LED fluorescent lamps, we suggest using 140- 170 degrees. I won't explain the rest in detail here.
7.LED chip determines the core quality of LED. There are many brands of LED chips, including foreign brands and those from Taiwan Province, China. The prices of different brands are also very different.
8. The size of LED chip also determines the quality and brightness of LED. We also try to choose a bigger chip when choosing, but the price will be higher accordingly. I. Main Structure and Scope of Application
LED lampshade is made of 6063 high thermal conductivity aluminum profile, with high-grade and exquisite appearance. The light source is Puri chip 5050 SMD LED imported from America. It is suitable for jewelry, display counters, home villa lighting, shopping malls, hotels, offices and leisure places, and is an ideal lamp to replace traditional fluorescent tubes.
Second, the structural parameters
Input voltage: 220 volts.
Operating voltage: 12V
Power:13.2w.
Length of light bar: 1m
Output luminous flux: 1040lm
Color rendering index: 85
Light source: led 0.2w * 66/m.
Color temperature: 2700-7500K
Appearance color: silver
Working temperature: -20℃~+60℃
Operating humidity: 10-90RH
Electric shock protection level: Grade II
Use drive: constant current drive, stable performance, safety and reliability.
Light distribution type: 120
Light distribution mode: the light source is specially selected, so that the LED light color is better, the light spot is uniform and concentrated, and there is no noise or shadow dark area.
Connection mode: terminal link
Third, the operation steps
1. Check the lampshade and light bar, and sort out whether all kinds of parts and accessories used for matching are complete;
2. According to the length of the counter, the lampshade is cut into matching lengths, and then the two ends are cut at 45 degrees.
3. Open through holes with a diameter of 3.5 mm on the inner sides of the left and right ends of the counter lampshade to connect with the fixing pad;
4. Two M3 holes are respectively opened at the lower parts of the left and right ends of the lamp trough, so as to be connected with the triangle block;
5. Install the lampshade to be installed into light strips with appropriate size and connect them together through triangular blocks;
6. Glue the fixing block to the openings of the left and right lampshades on the inner side of the glass with shadowless glue;
7. Fix the connected lampshade on the counter with screws;
8. Install the wire rod;
9. Install the driver. Pay attention to the input and output ports during installation, and pay attention to the connection of positive and negative poles when connecting the light bar. The red line is the positive connection and the black line is the negative connection.
Fourth, matters needing attention
1. Install the LED driver and LED light bar correctly;
2. 12V 3.2A driver is connected to our company's LED light bar no more than 4m, and 12V 5A driver is connected to our company's LED light bar no more than 5m;
3. The power supply must be cut off before installation;
4. Product installation must be carried out by professionals.