A good environment for the use of methods and the LED for high-quality long-term maintenance
LED Display Screen is also very important:
1, anti-static for LED Video display
LED Display assembly plant should have a good anti-static measures. Special anti-static and anti-static flooring, anti-static soldering iron, anti-static Taiwan pad, anti-static ring, anti-static clothing, humidity control, equipment grounding (especially the foot-cut machine) are the basic requirements, and regular use of electrostatic detection instrument .
2, Wave soldering temperature and time for Outdoor led display
To strictly control the solder wave front of the furnace temperature and time have been proposed as follows: preheating temperature 100 ℃ ± 5 ℃, the maximum does not exceed 120 ℃, and the preheating temperature rise for a smooth, welding temperature of 245 ℃ ± 5 ℃, welding time does not recommend more than three seconds, after the furnace must not have been the impact of vibration or LED, until the restoration of normal temperature state. Wave soldering machine to regular testing temperature parameters, which is decided by the characteristics of LED, and overheating or temperature fluctuations will directly damage the quality of LED or LED hidden dangers, especially for small size, such as 3mm round and oval-shaped LED.
3, The design of current LED Display sign
The nominal LED current is 20mA, the maximum use of general recommendations for the current nominal value of not more than 80 percent, especially for small screen space point, as a result of poor thermal conditions, but also reduce the current value. Based on experience, as the red, green and blue LED decay rate of the inconsistency, targeted to reduce the blue and green LED’s current value, in order to maintain white balance after the prolonged use of display consistency.
5, Mixed light for LED Display board
With a different color LED brightness profile of the need for mixing light, or designed in accordance with the laws of discrete interpolation interpolation map lights lights, the entire screen in order to ensure the consistency of the brightness of each color. If there are problems in this process, there will be Indoor LED display brightness inconsistent local phenomenon, a direct impact on the effect of LED display screen.
5, Control of vertical light for LED Display panel
LED for the line, the heaters have sufficient technology to ensure perpendicular to the PCB board LED. Any deviation will affect LED brightness has set a good consistency, the color appears inconsistent brightness.
6, Thermal design for RGB led display
LED work at the fever, the temperature is too high attenuation LED will affect the speed and stability, so the heat PCB board design, thermal design of ventilation box will affect the performance of LED.
7,Loose Soldering control for led display factory
LED display in the LED does not shine, they often have more than 50% probability for all types of Loose Soldering caused, such as the LED pin Loose Soldering, IC pin Loose Soldering, Pai Pin Loose Soldering such as the mother. The improvement of these issues need to strictly improve the process and to strengthen quality inspection to resolve. Vibration in front of the factory is quite a good test.
8, Driver circuit design for led screen
LED Display module on board the drive arrangement drives also affect the brightness of the LED. As the drive output current in the PCB board transmission distance too far, will make transmission path pressure drop is too large, the impact of the normal LED operating voltage to reduce its brightness. We often find that the LED display module brightness around the middle lower than that for this reason. Therefore, to ensure consistency of display brightness, it is necessary to design a good distribution of drive circuit.
