"315 Rights Day" reveals the story behind the inferior LED display
2019-05-27 14:54:48
The annual 315 International Consumer Rights Day will come again, and the topic of "counterfeiting" is about to become a hot spot. And friends in the LED display industry circle, I believe that the poor quality LED display has been pitted, the inferior LED display makes operators and the industry miserable, seriously affecting the healthy development of the industry.
The most probable quality problem of LED display screens usually occurs in the following aspects:

1. Power supply: Inferior power supply will cause the power supply to overload, screen failures, and even fires.

2. Lamp beads: Inferior LED lamp beads have a short life span, large heat generation, large color difference and fast decay, which seriously affect the display effect and life of the large screen.

3. PCB board: The material itself is inferior, the copper is thin, the design is unreasonable, and the process is poor, causing the copper wire to have burrs and other phenomena, which will cause short circuit of the circuit and become the root cause of fire hazards.

4. Wire: The quality of the wire on the market is uneven. Many wire rods are made of copper-clad aluminum. The appearance looks like copper wire. Actually it is aluminum alloy wire. This kind of wire is generally used for temporary use. It cannot be used for regular products. on.

  Therefore, the purchase of high quality qualified LED display is the first choice. On the occasion of 3.15, LED display brand manufacturer Henan Warner combined with its own experience in the industry for more than 10 years, summed up a set of strategies to select high-quality LED display, for everyone:


LED display quality problems, we can intuitively distinguish from the following aspects:

1. Surface flatness: According to the conventional standard surface flatness should be within ±1mm, the purpose is to ensure that the display image is not distorted, and partial convex or concave will cause the viewing angle of the display screen to have a dead angle.

2. Color reproduction: Color is the standard that can best reflect the quality of LED display. The reduction of color reproduction color refers to the reproduction of color on the display screen. The color is kept at a high level so that the image is realistic.

3. Brightness: The brightness of the indoor LED full-color display should be above 800cd/m2, and the brightness of the outdoor LED full-color display should be above 1500cd/m2 to ensure the normal operation of the display, otherwise it will be seen because the brightness is too low. The image displayed is not clear. The brightness is mainly determined by the quality of the LED die, so the quality of the LED chip is very important.

4. Viewing angle: The size of the viewing angle directly determines the number of display audiences, so the bigger the better. The size of the viewing angle is primarily determined by the way the LED die is packaged.

5. The white balance effect can determine the quality of a display: the ratio of the red, green and blue primary colors is 1:4.6:0.16, and the pure white is displayed. The slight deviation occurs. This small imbalance occurs. Very bad, this is an important factor.

6. Whether there is mosaic or dead point phenomenon: Mosaic refers to the bright or often black small four squares appearing on the display screen. The module is necrotic. The main reason is that the quality of the IC or connector used in the display is not good. . The dead point refers to a single point that is always bright or often black on the display. The number of dead points is mainly determined by the quality of the die and whether the manufacturer's anti-static measures are perfect.

7. There are no color blocks: color blocks refer to the obvious color difference between adjacent modules. The color transition is based on the module. The phenomenon of color block is mainly caused by the poor control system and the gray level is not high. The result is a lower scan frequency.

8. Safety: The LED display is composed of multiple cabinets, each of which must be protected by external grounding. The grounding resistance should be less than 0.1 ohm. And can withstand high pressure, 1500V1min does not breakdown. Warning signs and slogans are required at the high voltage input and at the high voltage wiring of the power supply.

9. Packaging and transportation: LED display is a valuable cargo with a large weight. The packaging method used by the manufacturer is very important. Generally, it is packaged according to a single box. The sides of the box must have a protective material to cushion the space, and the internal space of the box is not large during transportation. The outer box must be clearly marked.
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