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LED explosion-proof lamp beads and way
Yesterday, several friends of the same group discussed together the LED explosion-proof lamp beads, and everyone's thoughts were different. After returning home, they read a lot on the professional forums about whether they were first and then again, or whether they would And, in the end, what kind of arrangement is, or for LED explosion-proof floodlights, which is more conducive to lamps.
Now the LED explosion-proof lamp ranks in the ranks is to use the first string and then the way, then why do you use this method to arrange it, Xiao Bian checked the information, the main reason is that the first string and then side-by-side line is simple, for the LED explosion-proof lights Lamp beads Vf value is not high, that is, the quality of the lamp beads is not so high, then we change the thinking, the lamp beads of low quality requirements, the product quality will be how? First and then again there is also a disadvantage, as long as there is a lamp beads necrosis, then this string will not work, because it is a constant current drive power, the current side of the same situation, a string of beads do not work, the remaining The current of other lamp beads will increase, which will increase the brightness of other lamp beads, and the temperature will also increase, which directly affects the quality of the LED explosion-proof lamp.
So first and then string it? First and then string is very demanding on the Vf value of the lamp beads. The Vf value of the lamp beads on an LED explosion-proof lamp requires an average protection. The quality of the lamp beads is also required to be more stringent, as long as it is done by the LED explosion-proof lamp. The smaller the Vf range, the higher the internal chip requirements. If the quality of the lamp beads can not keep up, then the first and then string method can not be used, because if there is one or several lamp beads in a lamp with high voltage, then the current of these beads will be biased. If you work long hours, the brightness of these beads will increase, and the temperature will become worse. Therefore, first and then again, you must ensure that the Vf value of the lamp can be kept within the same range.
The advantage of first and the string is that if a lamp bead is necrotic, then only one of the beads will not be bright, and the rest will still work. The driving power source is a constant-current working method. One lamp is not lit. Then the current of this lamp bead is added to the remaining lamp beads. Compared to the string of 10 lamp beads, the current is added to the other lamp beads. Which is better, I believe everyone is clear.
Regardless of whether the string is first, or the first string, we must consider whether the lamp beads we use can be applied or not, and whether the lamp beads are short-circuited or open-circuited in the case of necrosis. Now most of us in Wenzhou are using ordinary imitation lamp beads. As long as ordinary chips are installed, after necrosis is basically open, so as long as it is using Puri's chip, manufacturers demand high quality lamp beads It's better to use the first and second strings. Whether it is for the manufacturer itself, or for distributors and users, it is a better consideration. We cannot guarantee that an LED explosion-proof lamp will not be damaged for a number of years. Then we must consider how to make the damage be normal. Use, for example, Rong RLB155 lamps is the use of 60 beads, but also use the first and later string method, if the user after two years of use, only one broken, then the remaining 59 beads Or will work normally, then our lamps can still be used normally. After a bad lamp, there is no much impact on the rest of the lamp. It directly increases the service life of the lamp.
If everybody thinks that what I said is wrong, please point out that this is just about the arrangement of a LED light bulb of explosion-proof lights that tells Xiaobian's own opinion.