There are many kinds of LED lamp beads, which are also one of the parts commonly used in LED lamp industry. But many people don't know how to weld the lamp beads, because they don't know how to distinguish the positive and negative poles of the lamp beads. So today let the LED lamp factory teach you how to judge the positive and negative poles of LED lamp beads.
When we look at the LED lamp beads, we can see two internal block pins. We call it the bracket of LED lamp beads. The negative bracket is larger, because the negative bracket holds the chip of LED lamp beads, and the positive bracket is smaller. Therefore, inside the LED lamp bead, the pin of the large connection of the bracket is the negative pole, and the pin of the small connection of the bracket is the positive pole. Looking directly at the length of the pin, we can distinguish "the positive pin is relatively long".
The patch lamp bead is square. One of the four right angles has a small missing angle, which is the place with a small circle. Other right angles have no small missing angle. The end with a small missing angle is the negative pole, the other end is the positive pole, and the LED lamp bead of other manufacturers is the positive pole. The other end without notch is the negative pole.
When you can't confirm the outcome, of course, you need to use a multimeter to determine.