Constant current control module for LED street lamps

In the case of electricity, of course, the best AC-DC direct constant current output of the program. This program can only provide a small power output (<40W) only the United States Power Integration company TOP250YN can provide 75W power output of the program. The circuit is very complicated, expensive, and low flexibility, which is not popular in mains led lighting applications. LED street lamps direct constant current output power supply, but usually...Continue reading

The plate cooling of the outdoor LED spotlights

LED chip is characterized by high heat in a minimal volume. The heat capacity of the LED itself, it must be the fastest heat conduction out, otherwise it will produce a high junction temperature. Heat leads to the chip outside, a lot of improvements in the outdoor LED spotlights chip structure. In order to improve the heat dissipation of the LED chip itself, the most important improvement is the thermal conductivity of the better substrates. Early outdoor LED...Continue reading

How the junction temperature is produced in SMD high power LED

LED heat because the added energy is not completely converted to light, but part of the conversion into heat. SMD high power LED light effect only 100lm / W, its electro-optical conversion efficiency of only about 20 to about 30%. That is about 70% of electrical energy into heat energy. Specifically, the generation of SMD high power LED junction temperature is caused due to two factors. 1. The internal quantum efficiency is not high, and is compo...Continue reading

The heat dissipation of household LED bulbs used in the bathroom

LED cooling is now more and more people attach importance to, this is because the household LED bulbs failure or life is direct and to the junction temperature, heat is not good to high junction temperature, short life of the law of temperature in accordance with Porto Vilnius reduce the life of 10 ℃ will be extended 2 times. Released from Cree, Inc. the light fades and the junction temperature diagram (Figure 1) can be seen, the junction temperature can be controlled at ...Continue reading

Requirements for LED streetlight bulbs

Because you want to replace incandescent, so at least the following requirements: Brightness should be very incandescent usually talk about wattage and not talk about the number of lumens. Although the LED also can talk about wattage, but due to the efficiency of LED streetlight bulbs are still evolving, saying only that the wattage does not mean that its lumen. The most commonly used incandescent lamp wattage of 15 watts, 30 watts, 45 watts, 60 watts, 75 watts and 100...Continue reading

The applications of LED driver in mains LED lights

Very early that there have been a constant current diode, this diode is not a cause for concern, because it's just as the current standard for some instrumentation. However, recently led the industry to flourish, these diodes are suddenly aroused widespread interest. Many foreign companies have developed products for driving mains LED lights because the led high bay light must be the reason of the constant current source driven. Here we will be in-depth discussion of the ...Continue reading

Analysis of the power supplier of household LED ceiling lights

Here, the constant current diode is to input mains voltage changes to maintain the same output current, of course, can be eliminated due to the current caused by the household LED ceiling lights negative temperature coefficient increases. However, due to the pressure of the constant current diode to certain restrictions, so it can be absorbed by the supply voltage change is limited. 100V withstand voltage of the CRD, its operating voltage range is also minus its minimum o...Continue reading

The heat dissipation bathroom ceiling spotlights

Low-power bathroom ceiling spotlights beads, arranged dispersed, can contribute to the heat. Ceiling structural characteristics conducive to heat dissipation. 1. the Internal block the free flow of air. This is the biggest advantages Ceiling compared to other lamps. Closed without the circulation of air is a good thermal insulation properties of the insulator, in turn, to the free flow of air is the best heat sink. All hot objects in the world's last all t...Continue reading

The composition and heat dissipation of the high performance led flash light

Not consider the gorgeous crystal ceiling lamps, ordinary high performance led flash light structure and ceiling lamps there is no difference. From the bottom shell, housing, power, light and other four parts. Usually for power greater than 30W more than most of the 1W high performance led flash light beads, less than 30W of most of the low-power led high bay lamp (such as 3020,3014,3528, etc.). The recommended low-power LED chip, so that in the heat, can also in...Continue reading

Major significances on the energy saving for LED ceiling lights’ popularization

LED ceiling to replace the ordinary fluorescent ceiling lamps can significantly save energy, thereby reducing carbon dioxide emissions. In general, for every 1 kWh of electricity savings can be reduced to 0.272 kg of carbon dioxide. From the measured results shows an 8W LED ceiling lights is about to replace a 16W ordinary fluorescent ceiling lamps, so you can power-saving 8W. Assuming average three hours a day turn on the lights, then the annual power saving of 8760 kWh,...Continue reading

Guangzhou International solar LED lighting Fair held in February

Guangzhou Optical Valley officially opened in November 2011, pre-assigned to the OSRAM / the PHILIPS / Neo-Neon / ground / SFT and so well-known enterprises in the industry, Guangzhou Optical Valley booth thousands, of varying sizes to meet the different needs of any customer. See the opening of the Guangzhou Optical Valley, so I suddenly had an idea, such a large physical trading market will lead to the Guangzhou International solar LED lighting Exhibition what kind of effec...Continue reading

Analysis of the trend of LED household lighting industry in 2012

Under the current complicated international and domestic environment, the individual in 2012 in mainland China LED industry to do some simple analysis, do not want to be Paizhuan like: 1, it was said in 2011 China's LED market in the first year, I personally think that this view is very accurate, can be seen from the mainland China LED household lighting industry in 2011 on the development of the middle and lower reaches of the customer's situation in 2011 is...Continue reading

Guangzhou International wireless led lighting Exhibition

Eighth Guangzhou International LED Exhibition held as scheduled in February 2012, 20-23, in the process of participating, I found several phenomena here and share: 1, the exhibition according to basically the same as the size of the 2011 Guangzhou International wireless led lighting Exhibition, exhibitors should be similar, there may be a little less a little downturn since the 2011 LED industry, companies are tightening the budget caused by it; ...Continue reading

China will implement the subsidy policy for LED household lighting

The advantages of LED household lighting products, green energy, such as state support for the LED industry, but more and more to force the Chinese Ministry of Finance for the first time LED product promotion subsidy policy has been announced to take the form of "indirect subsidies" by the Chinese financial subsidies to bidder enterprises, the enterprises of the bidder according to get the standard protocol supplier price minus the price of sales of financial subsidies to the ul...Continue reading

LED epitaxial chip engaged in outdoor led landscape lighting business

In recent years, LED epitaxial chip industry with outdoor led landscape lighting continue to expand rapidly. Between 2009-2011, according to statistics released by the National Semiconductor Lighting Project R & D and Industry Alliance, the size of the domestic LED epitaxial chip industry rose from 23 billion to 65 billion, a CAGR of 68.11%. LED industry in China started the development package, the initial chip is mainly dependent on imports, downstream of t...Continue reading

The development of the LED epitaxial silicon using in SMD high power led

The rapid development of LED lighting LED products have developed rapidly, the development of its LED lights and LED Silicone is a very good performance, very bright LED lighting market development scenarios in the present, believe that people's understanding of LED lighting that LED epitaxial the chip is an important parameter affecting the SMD high power led products, so the Shenzhen LED silicone think the LED epitaxial silicon market trends is very broad. LE...Continue reading

The development of LED household lighting power suppliers

With the rapid infiltration of the field of LED household lighting, LED market conditions are very clear, low LED market review in 2011, obviously a lot of people about to go into hibernation for the LED market is expected to errors, with the new year national increase support and promotion of the LED industry, the development of the LED is in a period of rapid development. The global LED lighting power supply market is about the influx of $ 10 billion in busines...Continue reading

LED high power light becomes lighting "potential shares"

The prospect of a rising star as the field of lighting, LED lights are very bright. The Bandung Hui Yang, lighting stores and many LED high power light business for their promotion, the relevant government departments also promote the development of LED industry. In 2009, the State Ministry of Science called "10 City, 10000," semiconductor lighting application demonstration cities program, the first phase of the promotion of LED lights in 21 developed cities, the second phase...Continue reading

Distributors start to promote LED recessed downlights

The price is high, in fact, consumers do not have settled an account, that is, with LED lights saved electricity, can be offset by the LED lamp with an ordinary incandescent lamp, the difference between the energy-saving lamps. Also, LED recessed downlights more durable, unlike the other lights are easily damaged because of the number of switch. "Consumers do not understand these truths, in my opinion the root of the problem is the recognition of the LED lights should be im...Continue reading

Electrostatic damage to mains LED lights chip

Static electricity is a pernicious devil, the world countless electrostatic damage to electronic components, resulting in tens of millions of dollars in economic losses. So to prevent electrostatic damage to electronic components, is a very important task of the electronics industry, mains LED lights packaging, application of the enterprise do not take it lightly. Any link problems, will result in damage to the mains LED lights, the LED performance deterioration...Continue reading

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