As we all know, LED display screen has a number of LED beads, so the selection of LED display screen is actually in the selection of LED beads, but many customers actually do not know how to select LED beads, not to mention how to select LED display screen, to select all depend on fate, fate to buy, fate did not buy, Buddhist Department to buy. Home. But there are also many customers who like to hold everything in their hands, so we need to know how to select the LED display screen. Today, let's talk about what we need to pay attention to in the selection of LED beads.

     1. Look at product packaging and trademarks

     This is the simplest and most intuitive method of discrimination. The packaging of genuine LED lamps should be marked with rated voltage, voltage range, rated power and other information, as well as brand trademarks and related certification marks. The trademark printed on the packaging of genuine LED lamp is of good quality, clear font and difficult to fall off. Even if wiped with soft and wet cloth, the trademark is still clear and identifiable. The quality of trademark printing of fake and inferior products is poor and the font is blurred. Some products'trademarks can be erased with wet cloth. In addition, there are some inferior products on the outer packaging there is no printed trademark and related certification marks.

     2. Look at the appearance of the lamp tube

     The authentic LED lamp uses three primary colors, and the color of the lamp tube is white. After covering with hands, the color of the lamp will look whiter. When choosing and purchasing, consumers can compare several LED lamps together. The products with better uniformity in shape and size of lamp tubes are generally mass-produced products, and the quality is mostly guaranteed. In addition, it also depends on the appearance of the LED lamp whether there are cracks, loosening, and observe whether the interface has been pry marks, if there is, it is inferior products. In the process of installation and disassembly, genuine LED lamps will not appear loosening and crooked.

     Consumers can also distinguish the quality of the LED lamp by its shell material. The plastic shell of the genuine LED lamp is made of flame retardant material, which has a rough texture and is similar to frosted glass. The inferior products are made of plastics with smooth and glossy surfaces, which are easily deformed and flammable.

     3. Look at the temperature at work 

     In the working state, the temperature of the genuine LED lamp will not be too high, so it can be touched by hand. If the product purchased warms up obviously at work, it indicates that there is a problem with its quality. In addition, if the light of the LED lamp flickers, it also shows that there are problems in its quality.

     4. Look at EMI

     In our country, EMC is an important index to check whether the electrical products are qualified or not, so consumers can check whether there is a relevant mark on the packaging of the LED lamp when they choose to buy it.

     When purchasing, consumers can use medium and short wave radios for testing. Place the radio near the LED lamp after power-on. Observe the noise emitted by the radio. The lower the noise, the better the EMC of the product.

Source: Display Home