Countries are developing new LED industry standards and test methods, LED flux, axial luminous intensity, beam half-intensity angle

Spectral radiation bandwidth, radiation flux, the luminous efficiency, the rechargeable fans emitting peak wavelength, correlated color temperature, color purity and dominant wavelength, color rendering index, etc.

Parameter to judge. Consider the electrical characteristics of the PN junction LED for the electrical characteristics of the semiconductor light-emitting diodes in terms of the electrical properties of the LED is unidirectional.

Nonlinear conduction characteristics, low voltage drive, as well as sensitive to electrostatic characteristics. Unlike traditional electrical characteristics of the light source, so the main measure

The amount of parameters including forward drive current, forward voltage drop and reverse leakage current, reverse breakdown voltage and electrostatic sensitivity. keychain flashlight source

Since the LED is a narrow beam, high-brightness light-emitting element, the radiation may be the human eye retina consider the radiation safety of biological or human

Membrane to cause harm, so, the International Electrotechnical Commission (IEC), the effective radiation limit requirements and measurements required for different occasions, the application of LED

Test method, which is judged to the LED of the merits of the quality is an important factor. Which the European Union and the United States do the LED radiation safety testing mandatory

Requirements to perform.
    The length of the reliability and service life of the LED work especially LED as these two indicators in the LCD backlight and large screen is more emphasis on

Want. We can evaluate the length of life of the LED is not from the available period of use to the damaged, but rather refers to the LED in the rated power conditions

Flux decay to the duration of the prescribed percentage of the initial value. The duration is longer, the longer the life of the LED.