LED lamp bead damaged several reasons, the problems caused by the power supply is not normal one.
Check the power of the power supply to have normal work, designator light had lit up, if there is no light up, please check the power supply have good connection.
Check to see if the lamp bead wire with power supply anode connection is good, is there a reverse, if you have the above problem, please correct connection.
Second, LED lamp bead for the requirement of the nominal voltage 3 v LED lamp bead, in fact, different colors have different requirements for electric current, yellow require minimum current, in turn, is red, green, white and blue, current is too large, makes the wick burned.
Even if the voltage is not big, but current is too large, will still be burning.
When choosing the power, if do not conform to the requirements of the rating of the LED lamp bead, the need to improve the circuit, was the common resistance.
Three, the cause of the high power LED lamp bead burn 1.
Two root filament industry, gold, pure gold, be conductive to use, two positive and two negative, really good product will have the fifth line, welding on the zener, protection.
Shorter filament has been very clear to tell you that the lamp has been burned large current, equivalent to a short circuit.
Between the 6 v, it is important to note that when using excessive current 4 will burn the light.
Typically three 1 w lights aluminum plates are driven around 12 v, there are few direct use 220 v, the less you can check whether a constant current source or a less driving power supply 12 v?
Four, the cause of the LED lamp bead yellow LED WaiFeng mostly yellow glue reasons caused by epoxy resin and curing agent does not match, but also can't rule out WaiFeng glue baking time is too long.
The solution: buy complete WaiFeng adhesive and curing agent, the other pays attention to the production control, in strict accordance with the work instruction operation, avoid the baking time is too long and inadequate or, is a very good grasp of the situation.
Five, the cause of the LED lamp bead leakage process equipment off ground, staff did not wear electrostatic ring caused by the electrostatic protection.
And encapsulation process, welding wire welding partial PAD, the last is the chip itself quality problems.
Six, the LED light failure reason 1.
Iron lining thermal conductivity bad 2.
3 epoxy resin thermal conductivity.
Contact with stent close enough 4 chip.
Attenuation more chip