To produce good quality LED Display , to be in good technical control of the following aspects:
1、anti-static electronic display panel was led assembly plant should have good anti-static measures. Special anti-static, anti-static flooring, anti-static soldering iron, anti-static pad, anti-static ring, anti-static clothing, humidity control, equipment grounding (especially cut legs) are all basic requirements, and regular tests to use static analyzer . LED Display More related: http://www.qs-tech.com/
2、the driving circuit on the module LED Display driver IC driving circuit board will also affect the arrangement of LED brightness. The driver IC output current in the PCB, the transmission distance is too far, will make the transmission path pressure drop is too large, affecting the normal LED operating voltage leads to decrease in brightness. We often find that around the LED display module LED brightness lower than the middle, that is the reason. Therefore, the display brightness to ensure consistency, we must design a good distribution of drive circuit.
3、the nominal design current LED display current is 20mA, the maximum use of current general recommendation of not more than 80% of the nominal value, especially for small screen spacing, due to poor heat dissipation, but also reduce the current value . According to experience, because the red, green and blue LED display decay rate of the inconsistency, targeted to reduce the blue and green LED's current value, in order to maintain the white balance after the prolonged use of display consistency.LED Display More related: http://www.qs-tech.com/
4、a color mixing light of different brightness profile with the LED lights require mixing, or the law of design in discrete graph inserted plug light lamps, the entire screen to ensure the consistency of the brightness of each color. If you have problems in this process, there will be displays of local brightness inconsistency, a direct impact on LED Display screen.
5、control the lights for the vertical-line LED, when the furnace should be sufficient to ensure that LED display technology is perpendicular to PCB. Any deviation will affect the already set LED brightness consistency, appear inconsistent brightness of color. LED Display More related: http://www.qs-tech.com/
6、wave soldering temperature and time had to be strict control of the temperature wave front and the furnace welding time, it is recommended as follows: preheating temperature of 100 ℃ ± 5 ℃, the maximum does not exceed 120 ℃, and the preheating temperature rise for a smooth, welding temperature to 245 ℃ ± 5 ℃, welding time recommended no more than 3 seconds after the furnace vibration or shock should not LED Display , until the resumption of normal temperature. Wave soldering machine to periodically test the temperature parameter, which is determined by the characteristics of LED, overheating, or fluctuations in temperature will cause direct damage to the LED or LED quality problems, especially for small size, such as circular and oval 3mm LED