1. In the case of no power. How to split the LED lamp beads to send what color of light?

2. The reason why high-power LED lamp beads burn out?

3. Reasons and solutions for the yellowing of LED lamp beads.

4. How is the leakage of LED lamp beads caused?

5. What factors are related to the large luminous decay of LED lamp beads?

   In the case of no power, there is no way to distinguish the color of the colorless LED lamp beads. If it is convenient to choose at the time of purchase, it is recommended to prepare a 3V button battery. It is convenient to use this battery when choosing. Check out what the LED glows.

    a. There are two pure gold filaments on the upper and lower sides, called gold wires, which are used for conduction, two positive electrodes and two negative electrodes. Really good products will have a fifth wire, which is welded on the Zener tube for protection.

    b. The shortening of the filament means that it has been burned by a large current, which is equivalent to an open circuit.

    c. The driving current of the high-power 1WLED lamp bead is about 350mA, and the working voltage is between 3.2-3.6V. Please pay attention when using it. Excessive current will definitely burn out the lamp bead.

    d. Generally, LED lights need to be equipped with drivers. Few of them are used directly on 220V. They must be connected to the driver before they can be connected to the 220V power supply.

    The yellowing of the LED lamp bead sealant is mostly caused by the mismatch between the epoxy resin and the curing agent, but it cannot be ruled out that the baking time of the sealant is too long.

    Solution: Buy a complete set of outer sealant and curing agent, pay attention to production control, and operate strictly according to the operation instructions to avoid reasons such as excessive or insufficient baking time. Static bracelet. Improper electrostatic protection. Then there is the packaging process, the welding wire PAD is biased, and finally the hidden quality problem of the chip itself.

    a. The iron bracket has poor thermal conductivity.

    b. Epoxy resin yellowing.

    c. The chip is not in close contact with the bracket.

    d. Chip attenuation is large.

      If it is white light, there is also the problem of phosphor attenuation.