Causes and solutions for damage to LED display lamp beads

10 views admin 2025-03-24

01. Check whether the power supply is working properly and whether the indicator light is on. If not, check whether the power supply is connected properly;

02. Check whether the power cord of the lamp bead is connected to the positive and negative poles of the power supply and whether there is any reverse phase. If the above problems exist, please connect them correctly.

Nominal 3V LED lamp beads, in fact, different colors have different requirements for current. Yellow requires the smallest current, followed by red, green, white, and blue. Excessive current will cause the wick to burn. Using 2.4V rechargeable batteries, yellow is easy to burn, because even if the voltage is not large, but the current is too large, it will still burn at will.

When using button batteries, because the voltage of the button battery is 3V, but because the discharge current of the button battery is very small, the 3V LED lamp bead will not be burned. Therefore, when using LED lamp beads, you should choose a suitable power supply, pay attention to voltage, and current. When selecting a power supply, if it does not meet the rated requirements of the LED lamp beads, the circuit needs to be improved, and the common installation of resistors!

When there is no power, if you want to make it easier to choose when purchasing, it is recommended to prepare a 3V button battery. When choosing, you can easily check what light the LED emits with this battery.

01. The upper and lower filaments are called gold wires in our industry. They are made of pure gold and are used for conductivity. There are two positive poles and two negative poles. Really good products will have a fifth wire, which is welded to the Zener tube for protection.

02. The shortening of the filament clearly tells you that your lamp has been burned by a large current, which is equivalent to a circuit breaker.

03. The driving current of a high-power 1W is about 350ma, and the working voltage is between 3.2-3.6V. Please be careful when using it. Excessive current will definitely burn the lamp.

04. Generally, the aluminum substrate of three 1W lamps is driven by about 12V, and rarely directly used by 220V. Please check whether a constant current source or a 12V driving power supply is missing.

The reason why LED outer sealant turns yellow is mostly due to the mismatch between epoxy resin and curing agent, but it cannot be ruled out that the outer sealant is baked for too long.

Solution: Buy a set of outer sealant and curing agent, such as fine chemical model 800 or 2339 glue, which will not cause the following situation. In addition, pay attention to production control, strictly follow the operation instructions, and avoid baking time too long or insufficient, etc. This situation is very easy to control.

The machine equipment is not grounded, and the personnel do not wear an anti-static wristband (it must be a cord). Improper electrostatic protection caused. In the packaging process, the welding wire PAD is biased, and finally there is a quality risk problem of the chip itself.

In fact, it is neither. LED lamp beads are just diodes. They need a forward conduction voltage to work, which is generally 2-3.5V. In addition, the current can control the brightness of LED lamp beads. In other words, LED lamp beads only convert electrical energy into light energy.