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Self heating principle of LED light source cob phosphor
2022-02-08When the LED blue light shines on the luminescent material (phosphor), part of it is reflected, scattered and transmitted, and the rest is absorbed. Some of the absorbed light is used as luminescence transition, emitting photons, and some are used as lattice vibration to produce quenching. Luminescence and quenching are two independent and competitive processes in luminescent materials. When quenching is dominant, luminescence is weak and efficiency is low, and vice versa. The fluorescence quantum efficiency is the ratio of the number of photons emitting secondary radiation fluorescence to the number of primary radiation photons absorbing excitation light per unit time.
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In addition, when choosing LED lights, some people have the following misunderstandings!
2020-02-07Myth 1: the expectation of actual service life is too high. LED manufacturers expect LED life to reach 100000 hours MTBF (mean time between failures, a standard used by traditional lamp manufacturers to measure the life of light sources). But, like all basic light sources, LEDs The luminous flux lumen also decays over time. Therefore, although the LED light-emitting time can be very long, MTBF is not the only consideration to determine the service life.
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How do LED display manufacturers prevent static electricity
2020-02-07We all know that full-color outdoor LED display has good color performance in many fields of life. It has a good reputation for its convenient maintenance, energy and power saving, wind and pressure resistance, stable, reliable and applicable characteristics. As one of the outstanding representatives of LED display products, outdoor full-color LED display has become a charming highlight of smart city construction. However, outdoor full-color LED display is an electronic product after all, and there are many potential hazards, such as static electricity. If it is not protected in time, the service life of the display will be reduced. Let's take a look at how Shenzhen LED manufacturer Chengtong photoelectric prevents static electricity.
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Advantages of LED lamps
2019-02-121. Environmental protection, no pollution Traditional lamps contain a lot of mercury vapor, which will volatilize into the atmosphere if broken. However, LED fluorescent lamps do not use mercury at all, and LED products do not contain lead, which can protect the environment. LED fluorescent lamps are recognized as green lighting in the 21st century.
