How to determine the LED bulb stroboscopic
现在许多人家里都使用LED灯泡了
究竟LED灯泡现在也比较廉价
并且在功耗方面是最节能的
下面给我们拆解一下这种LED灯泡
看看内部的电路是怎样的
这是拆下的一枚2W的灯泡
如果直接拧灯罩是比较难拆开的
使用吹风机吹一下边边的胶
封口胶受热软化后
就很容易打开了
打开之后能够看到
里边有一片LED控制电路和一片LED铝基板
LED铝基板上有许多LED
LED分成两组
每组有6个LED相互串联
LED灯泡控制电路的元器件
包含有电阻、电容、二极管
能够看到其实电路板很简单
包含的元件并不多
将上面电路板的电路图画出来是这样的
图中只画了部分LED
电容C1和电阻R1组成阻容降压电路
降压后通过桥式整流电路进行整流
整流后用电容进行滤波
然后通过限流电阻R3输出电压点亮2组LED灯
只需要这些元件就做成了一个LED灯泡
是不是感觉很简单?
but similar to that of LED bulbs stroboscopic is actually bigger
under the simulation circuit of voltage waveform
stroboscopic is lower, the smaller the eye damage
high quality LED bulbs is constant current to drive the LED chip
this stroboscopic low
industry standard stroboscopic requirements for the qualified products in our country is 3125 Hz
which how to quickly distinguish the stroboscopic of the LED?
simple
is directly using a mobile phone camera
light leds in the camera focus
will be able to tell the stroboscopic of
low stroboscopic light bulbs, and investigation to the naked eye under the lens so little difference between
stroboscopic low LED bulbs
high stroboscopic light bulb, the line of mobile phone screen appear frequently moved
even blink
stroboscopic high LED bulbs
internal persistence flow chip, can effectively reduce the stroboscopic
usually chip with persistence flow light bulb with a higher price