External LED lamp beads are gradually occupying the current electric lamp market due to their high brightness, low energy consumption and long life. Generally speaking, it is difficult for UV LED lamp beads to work. In the role of UV LED lamp beads, there are three kinds of errors: the lamp does not turn on, the lamp dims, and the lamp flickers after turning off. Today we will analyze and deal with each role one by one.
The layout of UV LED lamp beads
There are two methods for external LED lamp beads, one is ceiling lamp and the other is bulb. Regardless of the method of the lamp, the external layout is the same, divided into lamp beads and drivers.
External led chip
Lamp beads
Close the shell of the ceiling lamp or the red plastic part of the bulb, and you can see that there is a yellow rectangular circuit board on the outside. The yellow on this circuit board is the lamp bead. The lamp bead is the luminous body of the UV LED lamp bead, and its number determines the brightness of the UV LED lamp bead.
driver
The driver device of the UV LED lamp bulb is at the bottom and cannot be seen on the surface. The driver of the ceiling lamp is a black box, and the device driver is necessary when the lamp is installed.
The drive has the effects of constant current, step-down, rectification, and filtering.
