seven methods for testing small-pitch LED displays

Sep 15,2021| LED Knowledge

The small-pitch LED display is another major innovation on the LED display. Through the small-pitch LED lights, the displayed pictures are high-definition and lifelike, and the power consumption is about 30%-70% lower than that of the traditional LCD display (depending on the use environment) Unlike temperature, the value fluctuates). Therefore, more and more display products such as indoor advertisements and video walls are replaced by LED display screens with small pitch.

Although LED small-pitch display screens are widely used, if you want to know how to buy better LED small-pitch display products, there are some knowledge that we need to learn and understand. Let's take a look together.

seven methods for testing small-pitch LED displays

1. Control card: At present, there are not many manufacturers capable of producing control cards, and they are basically outsourced by Shenzhen LED display manufacturers. Nova, Colorlight, and Kasida are in better working conditions. Using these control cards on the LED small-pitch display screen, relatively speaking, the stability is better.

2. Driver IC: The driver ICs used for the development of small-pitch led displays include MEAN WELL, Chiptron and some relatively low-end driver ICs; if you choose an IC with good performance, the displayed image will not only have very clear image quality, but also no The scan line and failure rate will also be relatively lower.

3. Circuit boards: There are relatively many manufacturers in China that can produce circuit boards, and Shenzhen is a concentrated place for electronic products, so the purchase of raw materials is very fast. The circuit board can be divided into two layers and four layers, the thickness of the two layers is 1.6. The four-layer board is 2.0.

The element that may affect the quality of the circuit board is the internal conductor of the circuit board. The thickness of the conductor must reach the standard thickness of 1ns or more, because the small-pitch LED display will have a tendency of temperature rise and fall during operation; if the conductive copper skin is very thin, the LED module will melt during use, which will cause A wide range of quality issues.

4. Problems with masks and kits: Masks and kits are mainly related to materials. If low-quality plastic is used, it is easy to cause damage to the mask and kit. In addition, the consistency of the ink color of the mask will directly affect the flashing effect of the LED full-color screen. Assuming that the ink color is good and the quality of the LED light is good, basically flickering is not a big problem.

5. Water resistance: The waterproof performance of outdoor led small-pitch displays depends on whether it is mechanical glue or manual tube glue. The quality of glue is related to the ratio of AB glue.

6. The craftsmanship of the cabinet: Whether the cabinet is flat or not is related to the equipment and manual welding technology of the LED display manufacturer. After the led small-pitch display frame is completed, the flatness of the entire screen will be better, and the seams will be small.

7. Brightness: It is not that the higher the brightness, the better, because increasing the current can increase the brightness of the LED lamp, but this will affect the life of the LED display. Some outdoor LED small-pitch display screens have high brightness, which makes you look good, but usually it will not last a year. Therefore, the brightness is enough. Uniformity means that the brightness is almost soft and can be viewed under light conditions. If the brightness is uneven, it will look dirty, just like it is not clean.


  Article KeyWords:small-pitch LED display

 

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