Backlit LCD screen maintenance

Expert advice 1: Keep a dry working environment and avoid contact with chemicals

It must be known that moisture is the natural enemy of liquid crystal. If the humidity is too high, condensation will occur inside the liquid crystal display. After condensation, leakage and short circuit will occur, and the liquid crystal display will become blurred. Therefore, do not put the LCD monitor in a humid place, and do not let anything with moisture enter the LCD monitor. If you find that there is only fog on the surface of the screen before turning it on, wipe it gently with a soft cloth; if moisture has entered the LCD display, you can turn off the display, turn the LCD away from the sun, or bake with a desk lamp to evaporate the water inside That's it. But be careful not to expose the LCD screen to the sun, it will cause the aging of components. Experts remind consumers that major international manufacturers such as LG pay great attention to after-sales service. If there is a serious moisture incident, it is best for ordinary users to get in touch with local brand after-sales service providers and seek help from them. Because the more serious moisture will damage the components of the LCD, when the user energizes the LCD with high humidity, it will cause the liquid crystal electrodes to corrode and cause permanent damage.

In addition, the daily use of hairspray and the mosquito repellant frequently used in summer will also cause damage to the liquid crystal molecules and even the entire display, resulting in shortening the life of the entire display. Therefore, contact between the display and chemicals should be avoided as much as possible.

 

Expert suggestion 2: Try to avoid overloading the LCD monitor for a long time

First of all, don't leave the LCD in a high brightness state for a long time. The display mode of LCD is different from that of CRT. Long-time high-brightness pictures can easily shorten the service life of the backlight tube of the LCD display. Therefore, when not in use for a long time, you should pay attention to turning off the display. In addition, the brightness of the liquid crystal display can be appropriately lowered in daily use. These measures will greatly help extend the life of the LCD monitor.

Second, try to avoid displaying the same screen for a long time. The LCD monitor will cause internal aging or burnout due to long-term work, especially when the same screen is displayed for a long time. Because the LCD display can easily overheat some pixels after working for a long time, once the limit is exceeded, it will cause permanent damage and cannot be repaired. This forms what is often referred to as a "bad spot". Since the pixels of the LCD display are composed of liquid crystals, when they work continuously at full load for more than 96 hours, they will accelerate their aging, and even burn out in severe cases. Therefore, experts remind consumers that if users have to work for a long time, it is best to let them take a break intermittently, or change the screen display content at different time intervals; if they only leave temporarily, they should start a screen saver, or put The brightness of the display screen can be reduced, or it can be adjusted to a completely white screen, which can not only delay the aging of the LCD screen, but also avoid hardware damage. | Anti-electromagnetic interference. Both the CRT and the display should be kept away from objects with strong magnetic fields. The surrounding strong magnetic field will generate extra voltage inside the display, thus affecting the stability of the display voltage. Being in a strong magnetic field for a long time will also cause color distortion, which will affect the display effect and life of outdoor LCD.

 

Expert Suggestion 3: Reduce Unnecessary Touch or Vibration

The LCD screen is very fragile and delicate, so you should get rid of the bad habit of pointing your finger at the screen. Because even a slight click may produce local dead pixels, or even a black spot in severe cases, which can easily lead to an increase in dead pixels, which is why some users will find more and more dead pixels after using it for a period of time. . Another point to note is that the power consumption of the liquid crystal display is relatively small, but the voltage of the transformer behind the liquid crystal display is still very high; pay special attention to safety, and do not open the back cover of the display when it is powered on. Even after a power outage, the residual instantaneous voltage is quite high, and the CFL transformer in the backlight assembly still has a high voltage of about 1000V, so it is best not to touch it.

Not only that, the impact resistance of liquid crystal displays is also relatively poor, even the latest products, the impact resistance is still far less than CRT displays. This is because the liquid crystal display contains many delicate glass components and sensitive electrical components, which can cause damage to the LCD screen, related components or circuits once subjected to a strong impact. When people move the LCD monitor, they often do not pay attention to grab the screen and move it, which may also damage the surface of the LCD monitor. Therefore, experts strongly suggest that vibration with greater impact and pressure on the surface of the LCD screen must be avoided.

 

Expert suggestion 4: Correctly remove the dirt on the surface of the LCD monitor

If you find dirt on the surface of the LCD monitor, you should use the correct method to remove it. The medium used is preferably a soft, non-fibrous material, such as absorbent cotton, lens paper or glasses cloth, etc. Generally, it can be cleaned with water; however, if the cleaning effect cannot be effectively achieved, you can consider purchasing a commercial LCD cleaning product. One expert pointed out that consumers should not use cleaning liquids containing ammonia, alcohol and inorganic salts for cleaning.

Because the LCD manufacturing technology attaches great importance to the design of low radiation, anti-reflection, anti-glare, anti-static interference, environmental protection, etc., the manufacturing process of each component has undergone multiple protective treatments, such as multi-layer mirror treatment, or coating more Special high molecular polymer compounds, etc. These special chemicals are usually destroyed by chemicals containing ammonia, alcohol and inorganic salts, which will cause the display to slowly lose its true optical transmittance, or produce color distortion caused by refraction, or The effect of anti-interference and anti-static is reduced, which is not only bad for the eyes, but also affects the display quality of the image, and the original protective function is also destroyed, and the color and luster and safety will be greatly reduced. Consumers have to be careful.

 

Expert Suggestion 5: Do not disassemble the LCD display when you encounter problems

Because the liquid crystal display is too precise and squeamish, it cannot allow the replacement of parts like ordinary CRT displays. Therefore, no matter what kind of problem it has, don't disassemble the LCD display by yourself. This is not the "game" range of DIY; once you suspect that the LCD display is not working properly, you must find a professional manufacturer to help solve it. Experts once again remind consumers that because the CFL AC in the LCD backlight assembly may still have a high voltage of 1000V (although it is a micro-current) after a certain period of shutdown, even if there is no harm to the human body, it can be If non-professionals do not handle it properly, it may cause new failures of components, and in severe cases, the screen may permanently fail to work.