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What problems should be paid attention to in the use of LED display

by:Toponetech     2021-06-15
The purchase price of LED display is very expensive. The initial installation is very complicated and requires professional installation and debugging. Nowadays, LED display is widely used in daily life, so what should be paid attention to in daily use? How to maintain and improve the use time and Efficiency?    LED display screen will appear light decay phenomenon after a long time of use, that is, the signal in transmission is weakened. The two major factors affecting LED light decay are mainly the poor quality of LED chips and the rapid brightness decay. The other is the problem of using conditions. Some LEDs are driven by voltage to cause the LEDs to attenuate. The driving current is greater than the rated driving conditions. In fact, there are many reasons for the light decay of LED products, and the most critical one is the heat problem. Although many manufacturers do not pay special attention to the problem of heat dissipation in secondary products, under long-term use of these secondary LED products, the degree of light decay will be higher than that of heat dissipation The LED products are higher.   The light attenuation of LED products is the weakening of the signal during transmission. The light attenuation of LEDs is directly related to temperature and is mainly determined by the chip, phosphor and packaging technology. At this stage, the LED products made by major global LED manufacturers have different degrees of luminous decay. High-power LEDs also have luminous decay. The luminous decay of white LEDs on the market may be one of the most important issues in the march to civil lighting. The light decay phenomenon of large-scale LED digital displays and dot matrix displays has always been a maintenance problem during use. In addition to air-cooled cooling, LEDs must also adopt constant current measures. Pixel points (or pixel tubes, modules) composed of one or more LEDs are alternately lit under the control of a computer system. Its load is dynamic, and it cannot be matched with an IC integrated circuit constant current source. MZD thermistor is used to solve the problem, no need to modify the original circuit structure, as long as a WMZD thermistor is connected before or after each pixel (pixel tube, module) to compensate for a resistance bulb, it is convenient and economical Solved the phenomenon of LED display light decay. Choose WMZD according to the current of the pixel and the number of LEDs in series and in parallel. If the pixel tube is composed of 4~6 LEDs/18~20mA in series, a WMZD-A20 thermistor can be used in the loop. When the ambient temperature changes between -40℃~120℃, the current of the LED pixel tube is always Maintained at 18-20mA., effectively preventing the light decay of the LED, and the power consumption of the A20 thermistor is less than 60 milliwatts.  Precautions for the use of touch display:   1. The power supply is stable and the grounding protection is good. In the event of severe weather such as strong thunder and lightning, strong typhoon, etc., the power supply should be cut off in time, and the power supply of the display screen should be turned on after the weather returns to normal. Do not cut off forcibly at will, and do not frequently turn off and on the power supply of the display screen to prevent surge current. Avoid excessive current, excessive heating of the power cord, damage to the LED die, and affect the service life of the display. Do not disassemble or splice the screen without authorization!    2. Water is strictly prohibited inside the display, and flammable and easily conductive metal objects are strictly prohibited from entering the screen, so as to avoid equipment short circuit and fire.   3. If water enters the display, please cut off the power immediately and contact the maintenance personnel until the display board in the display is dry before use.  4. The switch sequence of the touch display screen:    On: first turn on the control computer to make it run normally, and then turn on the LED display screen.   Close: Turn off the LED display first, and then turn off the computer.   5. The surface of the LED display screen cannot be wiped directly with a wet cloth. You can wipe it with alcohol, or use a brush or vacuum cleaner to remove dust.  6. u200bu200bRegularly check the stability of the outdoor LED display supporting structure and the safety of the power supply cable. Any damage should be dealt with in time.  7. The LED display main control computer and other related equipment should be placed in an air-conditioned and dusty room to ensure the computer's ventilation and heat dissipation and stable operation.   8. The internal wiring of the LED outdoor display requires professional inspection and repair.  9. Before summer every year, check the cooling and heat dissipation equipment in the display in advance to ensure that the LED display operates in an allowable temperature environment.
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