8 factors that lead to damage to the LED screen

With the development of the LED screen display unit, the usage rate is rising because more customers have realized that it is a useful tool for expanding business and achieving more profits.

There are 8 factors that lead to damage to the LED screen, these factors must be taken into account to make the life of the electronic LED screen longer you not only need to pay attention to the method but also need to maintain the display screen.

There are 8 factors that lead to damage to the led screen:

Thermal design.
Mixed led.
Current value is too high.
Driver circuit design.
Control the verticality of the led.
False welding control.
Wave soldering temperature and time exceeded.
Antistatic.

1- Thermal design:

One of the 8 factors that lead to damage to the led screen.
LED will heat up when it works, and too high temperature will affect the decay speed and stability of LED, so the heat dissipation design of PCB board and ventilation and heat dissipation design of box will affect the performance of LED.

2- Mixed led:

One of the 8 factors that lead to damage to the led screen, LEDs with the same color and different brightness levels need to be mixed or inserted according to the light insertion diagram designed according to the discrete law to ensure the consistency of the brightness of each color on the whole screen.

If problems occur in this process, the local brightness of the large screen will be inconsistent, which directly affects the display effect of the LED large screen.

(8 factors that lead to damage to the LED screen)

3- Current value is too high:

The nominal current of LED is 20mA, and it is generally recommended that its maximum current should not exceed 80% of the nominal value. Especially for large screens with small point spacing, due to poor heat dissipation conditions, the current value should also be reduced.

According to experience, due to the inconsistent attenuation speed of red, green and blue LEDs, the current values of blue and green LEDs are purposely reduced to maintain the consistency of white balance after long use of the large screen.

(8 factors that lead to damage to the LED screen)

4- Driver circuit design:

The layout of the driver IC on the large screen module will also affect the brightness of the LED. Because the drive IC output current is transmitted too far on the PCB, the transmission path voltage drop will be too large, affecting the normal operating voltage of the LED and causing its brightness to decrease.

This is why we often find that the LED brightness around the large screen module is lower than that in the middle, Therefore, to ensure the consistency of the brightness of the large screen, it is necessary to design the driver circuit layout.

(8 factors that lead to damage to the LED screen)

5- Control the verticality of the led:

One of the 8 factors that lead to damage to the led screen, For in-line LED, there should be enough process technology to ensure that the LED is perpendicular to the PCB when passing through the furnace.

Any deviation will affect the brightness consistency of the LED already set, and there will be color patches with inconsistent brightness.

(8 factors that lead to damage to the LED screen)

6- False welding control:

When the LED is not lit on the LED large screen, more than 50% of the probability is caused by various types of faulty soldering, such as LED pin faulty soldering, IC pin faulty soldering, row pin and row bus faulty soldering.

These problems need to be solved by strictly improving the process and strengthening the quality inspection, Vibration test before delivery is also a good inspection method.

(8 factors that lead to damage to the LED screen)

7- Wave soldering temperature and time exceeded:

The temperature and furnace passing time of wave front welding must be strictly controlled, It is recommended that the preheating temperature should be 100 ℃± 5 ℃, and the maximum temperature should not exceed 120 ℃. The preheating temperature should rise steadily.

The welding temperature should be 245 ℃± 5 ℃, and the welding time should not exceed 3 seconds, After furnace passing, do not vibrate or impact the LED until it returns to normal temperature.

The temperature parameters of the wave soldering machine should be detected regularly, which is determined by the characteristics of the LED. Overheating or fluctuating temperature will directly damage the LED or cause potential quality problems, especially for small size round and oval LEDs, such as 3mm.

(8 factors that lead to damage to the LED screen)

8- Antistatic:

One of 8 factors that lead to damage to the led screen, The LED large screen assembly plant shall have good anti-static measures. Special anti-static ground, anti-static floor, anti-static soldering iron, anti-static platform mat, anti-static ring, anti-static clothing, humidity control, equipment grounding (especially foot cutting machine), etc.

Are basic requirements, and should be tested regularly with an electrostatic meter.

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(8 factors that lead to damage to the LED screen)

How to extend the life of the LED screen?

1- Provide stable power supply a stable power supply can provide stable voltage, which is not easy to cause local high temperature damage, and ensure the normal operation of the LED screen.

2- The led bead is the key to affecting the life of the LED film mounting screen when planning a project, certain brands and models of reliable LED, switching power supplies, and other raw materials should be selected.

3- Taking heat dissipation as the central work from unit design to project implementation and even system maintenance in the future; reduce LED working current; Configure the LEDs correctly to make each primary LED color attenuate synchronously.

4- Outdoor LED screen have a rest time of more than 2 hours every day, and at least once a week in the rainy season Turn on the screen at least once a month and keep it on for more than two hours.

5- One of the most important 10 ways to maintain LED display Regularly check whether the anti-corrosion and anti-rust paint has fallen off on the surface of the product and the welding joint of the steel structure. If there is peeling or rust, please spray anti-rust paint or anti-rust paste in time.

6- To avoid touching the LED screen, we can choose passive protection and active protection. When cleaning the screen, you should also wipe it as gently as possible to reduce the possibility of injury.

7- Keep the environment in which the LED screen is used moist and do not let anything of a moisture nature enter the screen, Operating the display containing moisture will corrode the full-color display components, causing permanent damage.

8- To avoid touching the LED screen display, we can choose passive protection and active protection, try to keep things that may cause damage to the full color display screen away from the screen, and wipe the screen as gently as possible to reduce the possibility of injury when cleaning.

9- The LED screen display has a close relationship with our users so it is necessary to do a good job of cleaning and maintenance.

10- It is necessary that the power supply be stable and the grounding protection be good. It should not be used in harsh natural conditions, especially in strong lightning weather.

The LED screen display should be placed in a low-dust environment as much as possible. Large dust will affect the display effect, and excessive dust will damage the circuit.

If there is water leakage due to various reasons, please cut off the power immediately, contact maintenance personnel, and use the display panel of the screen until it dries.

11- LED screen switching sequence:

A: First turn on the control computer until it works normally and then turn on the large LED screen display.

B: Turn off the LED screen before turning off the computer.

12- When playing, do not stay in the full white, full red, full green, full blue and other full bright images for a long time, so as to avoid excessive current, excessive heating of the power line, damage the LEDs and affect the service life of the display screen. Do not disassemble or paste the screen at will.

13- It is recommended that the rest time of the LED screen should be more than two hours every day and the large LED screen should be used at least once a week in the rainy season. Generally, the screen should be turned on at least once a month for more than two hours.

14- The surface of the LED screen can be wiped with alcohol or dusted with a brush or vacuum cleaner instead of directly wiping with a wet cloth.

By doing these steps, the service life of the screen and the service life of the LED screen will be more than 100,000 hours. Since the backlight is LED light in general, the service life of the backlight is similar to the life of the LED screen, even if it is used 24 hours a day. The theory of equivalent life has more than 10 years.

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