Outdoor LED display should pay attention to the problem
Quality is a full-color outdoor LED display can not be taken lightly, many companies in order to save costs, expand the market, often only focus on cost, only short-term interests, in the long run can only lose the market. In fact, outdoor full-color LED display every process, every design is related to the final quality, how to ensure quality and control costs is every LED enterprise should pay attention to the problem. So from which aspects to start, here is a brief summary.
1, outdoor LED display thermal performance
If the outdoor full-color LED display poor thermal performance, the temperature is too high, it will have an impact on the stability of the LED, long term will make the display accelerate the performance decay. So in this regard, must do a good job of PCB board thermal design and box cooling ventilation.
2, false welding
When the outdoor full color LED display is not bright, the most likely situation is because of the soldering caused by the soldering includes many aspects, so in the details here must do well. The factory must also do a good job of strict inspection.
3, control the verticality
A small deviation will have a direct impact on the LED brightness consistency, will lead to inconsistent color blocks. LED must be perpendicular to the PCB board.
4, anti-static for anti-static LED display manufacturers must do enough measures in this regard. A variety of anti-electricity settings must be in place, and regular testing.
5, LED mixed lights
The same color with different brightness grade LED need to mix the light, this order if there is a problem will lead to outdoor full-color LED display in the brightness of the local situation is not the same, directly affecting the appearance of the LED display.
6, LED thermal value
Normally, the maximum current of LED can not be higher than the standard value of 20MA 80% if some small pitch display must reduce the current value.
7,Driver circuit design
If the driver circuit design is not good, there will be outdoor full color LED display around the LED brightness is lower than the middle.
8, strict control over the wave soldering temperature and time
Preheating temperature of 100 ℃ ± 5 ℃, the highest not more than 120 ℃, and preheating temperature rise requires a smooth, welding temperature of 245 ℃ ± 5 ℃, welding time is recommended to be no more than 3 seconds, over the furnace do not vibrate or impact LED until the return to room temperature state. Wave soldering machine temperature parameters to be tested regularly.
