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Sanmak Lighting Co.,Ltd


Phone: +8615989038225

Fax: 0757-81248088-8065

E-mail: info@sanmak.com

Website: www.sanmak.com

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LED Signal Light Technology Improvement
Jun 09, 2017

With the improvement of lighting product technology, metal halogen lamp (white light, abbreviated as halogen lamp, also known as tungsten halogen lamp, halogen quartz bulb, a variant of the incandescent lamp, is developed from high pressure mercury lamps, LED Signal Light made from high-purity quartz tubes, filled with iodide containing mercury, argon, gallium, iron iodide, and some rare metal halide. The tungsten electrode is sealed with a molybdenum strip to form a circuit, and a metal lamp holder leads the end. The biggest difference between halogen bulbs and incandescent lamps is that they are filled with some halogen elemental gas (usually iodine or bromine) in the glass enclosure of the halogen lamp, its working principle is: when the filament heats, LED Signal Light tungsten atoms are evaporated to the glass tube wall direction, when close to the glass tube wall, the tungsten vapor is cooled to about 800 degrees and the halogen atoms together, forming the tungsten halide (tungsten iodide or tungsten bromide). The tungsten halide continues to move to the center of the glass tube and back to the oxidized filament, which, since it is a very unstable compound, is then decomposed into halogen vapor and tungsten after heat, so that tungsten is deposited on the filament to make up for the vaporized part, through the regenerative cycle process, the filament life is not only greatly prolonged (almost four times times the incandescent lamp), but also because the filament can work at higher temperatures, LED Signal Light resulting in higher brightness, higher color and higher luminous efficiency. However, because of the fluctuation of the power supply of the railway signal (Ac170v ac250v), the service life and luminous eff iciency of the halogen lamp are also affected.

Semiconductor LED light-emitting diode lighting technology is a new type of green lighting industry developed in recent years. In the 1990s, with the invention of nitride led, the luminous efficiency of LED had a qualitative leap. As a light source, the LED's advantages are embodied in three aspects: energy-saving, environmental protection and long life. LED does not depend on the filament heat to glow, LED Signal Light the energy conversion efficiency is very high, it only needs the incandescent lamp 15-20 energy consumption, compared with the energy-saving fluorescent lamp also only needs 40%-50% energy consumption. In the service life aspect, LED Signal Light the LED uses the solid package, the structure is firm, the life can reach tens of thousands of hours, is the fluorescent lamp life Number 10 times times and the incandescent lamp life nearly hundredfold. And because of the composition of mercury in the manufacture and use of fluorescent lamps and incandescent materials, LED Signal Light it can cause two pollution to the environment by breaking up the mercury in production and application.

As we all know, semiconductor led light-emitting diode because of the manufacturing process and the characteristics of semiconductor, PN Junction temperature is higher, its service life is shorter, the luminous efficiency attenuation is serious. On the other hand, led signal control circuit by the environment and electromagnetic interference, lightning interference and other factors, so that LED lights are delayed and lights and other phenomena, resulting in railway parking and other accidents. To this end, LED Signal Light we have carried out a number of tests and modifications, especially in 17kv-35kv electromagnetic field interference, anti-lightning interference, the use of the environment, combined with the existing small power LED railway signal, the advantages and disadvantages of the development of a high-power LED signal and halogen lamp lighting two control unit, LED Signal Light the cancellation of existing filament transformers, both can control high-power led signal, and can be used in the existing halogen signal unit, LED Signal Light does not change the railway department's original signal opening and control mode.

And the use of the power supply wide voltage input (Ac130v-265v), DC constant voltage output, the halogen signal bulb normal operation and prolong the service life played a very good role, LED Signal Light to solve the previous transformer single power supply, power supply voltage fluctuations, affecting the lamp life and luminous efficiency. For high-power led railway signal using constant voltage power supply, LED Signal Light to each led light-emitting tube to take constant-current drive, detection sampling, so that each led working status by the detection control circuit monitoring, when 30 open circuit or 30 short-circuit damage, the lighting unit alarm.