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The Harm of Stroboscopic: 1.It can be hurt to your eyes. 2.It can product illusion too. 3.It will cause inefficiency. The Production Principle of Stroboscopic: 1. The frequency of electrical power supply is low. At present, the vast majority of incandescent lamp, high-pressure mercury(sodium) lamp, inductive fluorescent lamp direct supply power by 50hz frequency sinusoidal […]
The basic structure of LED is a semiconductor, P – N junction. The experiment points out that P – N junction temperature will rise when the current go through the LED components, technically, we usually define the P – N junction zone temperature as the LED junction temperature. Usually, we put the temperature of LED […]
The certification of LED componets should test parameters as following: 1.The photoelectric performance( The curves of current, temperature, time) Test Equipment: Integrating Sphere 2.Thermal properties test ( junction temperature, thermal resistance) Test Equipment: T3ter 3.ESD Test ( during pre-test and post-test test L-V curve/LED particle have no punchthrough phenomenon ) Test Equipment: Electrostatic Discharge Simulator […]
Lamps and other electronic circuit which is work with dc voltage cannot work without the reactive power. Users generally believe that these devices only need active power but donn’t need reactive power, because they think it doesn’t work and it is useless. Of course, they take it for granted that the power factor of lamps […]