LED dispensing, in general, is the production of white LED fluorescent powder dispensing to ensure the production of LED tube. At present, there are only two kinds of dispensing machines on the market, pneumatic dispensing, metering dispensing methods. The pneumatic pressure will increase with the size to produce the adhesive dispensing machine, not accurate grasp, completely does not fit with the production of LED fluorescent powder, unable to meet the needs, can be called a LED dispenser, dispensing the dispensing machine production and application of the LED industry by measurement, he dispensing accuracy can reach 1/10000, is very suitable for the production of LED phosphor dispensing, called LED dispensing machine. Because the accuracy of LED dispensing machine is very high, so the choice of glue should be particularly cautious. We use the general LED product dispensing the fluorescent powder, be careful not to breathe in muzzle it itself has mercury toxicity, not only harmful to the human body, but also the impact on the environment. There is another characteristic of fluorescent powder is high concentration, poor mobility, so in the dispensing process must pay attention to its flow speed, glue can not plug the hole. And for ink, it's faster than the fluorescent powder, that is to say, the concentration is low. So in the dispensing process must control the glue to setting parameters of different possible change danger into safety.