LED light-emitting principle:
LED industry in China started in the 1970s. After 30 years of development, China’s LED industry has initially formed a relatively complete industrial chain, including the production of LED epitaxial wafers, LED chips preparation, LED chip packaging and LED product applications, including.
LED lighting LED III – IV compound, such as GaAs (gallium arsenide), GaP (phosphide gallium), GaAsP (gallium arsenide phosphide) and other semiconductor made of, its core is a PN junction. So it has the general PN junction IN characteristics, namely the forward pass, reverse-blocking breakdown characteristics. In addition, under certain conditions, it has a light emitting characteristic. Forward voltage, electrons from the N-region into the P region, the injection of holes from the P region N region. Into each other regional minority carriers (minority) part of the compound and shine with the majority carrier (number of children). Assume that luminescence occurs in the P region, the injected electrons and valence band holes directly composite and light-emitting, or first captured by the luminous center hole recombination. In addition to this light-emitting compound, also some electronic non-luminescent center (the center between the conduction band, dielectric tape near the middle) capture, and then with the hole recombination, the energy of each release is not and can not form visible.
Market for LED lighting products spectra led grow light:
LED explosion proof light source that some people call the long life lamps, which means the light never goes out. Solid cold light source, epoxy encapsulated, light body and no loose parts, there is no filament light easy to burn, heat deposition, the light fades and other shortcomings, the service life of up to 60,000 to 100,000 hours, longer life than traditional light source 10 times or more.
Therefore, to achieve this ideal state, the anti-aging ability is particularly important.
Content:
Aging test of an LED lighting products spectra led grow light:
LED backlight and lighting products for a long time aging test is a very important test, aging test can be detected early fault LED products in the long-term use may produce light fades, color temperature change, leakage, and conducive to the stability of the product. The ITECH power and burn-in test software is mainly used in aging test LED backlight and lighting products.
LED the aging lighting products test results and use of equipment have a great relationship, aging equipment and LED lighting products, must be guaranteed in the full heat of cases to determine the best time of aging, by aging system monitoring data, analysis and comparison, to get the most accurate test data, so as to achieve the purpose of the production and testing.
Second, LED aging test application of the power supply and the aging system should have features:
LED current work is very special, the test system in order to obtain reliable data. In general, the power LED aging test application and aging system should have the following characteristics:
1, high power than the NC DC power supply, wide voltage and current usage, the wide range of applications spectra led grow light;
2, can automatically control the rate of change of the voltage and current, the maximum possible reduction in cost;