Led light source lamp stroboscopic test method


The easiest way is to separate the five fingers of the […]

The easiest way is to separate the five fingers of the hand and shake it left and right under the light. If the light is not continuous light, you can see that the fingers seem to be motionless at a certain shaking speed. This is also the principle of flash speed measurement (speed measurement). .

Using a photosensitive tube connected to an oscilloscope to observe the received output waveform of the light can also directly see whether the light fluctuates and its frequency;

What is the reason for the stroboscopic occurrence of led lamps? This is related to the driver. If it is a good quality product, the driver uses a constant current circuit with isolated DC voltage output. The LED light source emits very stable light without stroboscopic. What is the reason for the stroboscopic occurrence of led lamps? There are some products of poor quality on the market. Directly use the mains electricity to limit the current through the capacitor series and double the voltage output. There are about 5 components like this, so that not only the LED has stroboscopic but also charged. When you buy it, cover the LED with a translucent paper and you can see if there is stroboscopic. It is dazzling when you look at it, but it can also be seen. Don’t buy products with stroboscopic, which can easily break.

LED light source stroboscopic cause solution

1. The LED lamp bead does not match the LED drive power supply. Normally a single 1W lamp bead can withstand current: 280-300mA, voltage: 3.0-3.4V. If the lamp bead chip is not of sufficient power, it will cause the light source to flicker. If the current is too high, the lamp beads will turn on and off if they can't bear it. A serious phenomenon will burn the gold or copper wires in the lamp beads, causing the lamp beads to not light up.

2. It may be that the driving power supply is broken, so long as it is replaced with another good driving power supply, it will not flash.

3. If the driver has the over-temperature protection function, and the material heat dissipation performance of the lamp cannot meet the requirements, the over-temperature protection of the driver will flash and go out when it starts to work. For example, the housing of a 30W floodlight lamp is used to assemble a 50W lamp. This will happen if the heat dissipation work is not done well.

4. If the outdoor lamps also flicker on and off, then the lamps are flooded. The consequence is that it will not light up when it flashes. The lamp beads and driver are broken. If the driver is waterproof, just break the lamp beads and replace the light source.