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Single-board LED white lights detected in the aging of data, and the white light LED assembly into a lamp aging detected when the data is certainly a bit out of.
This difference in size, depending on the LED work lamp electrical parameters and design, as well as lamps used in the environment.
First, choose what kind of LED white light.
This is important, LED lights can be said that the quality is very important. Some examples, the same section of the chip wafer 14mil white represented the end to do with ordinary epoxy adhesive glue with white glue and packaging out of the LED package of white light, single light in the environment of 30 degrees, a After thousands of hours, light attenuation data for the 70% decline; Class D low failure if the glue package of the aging in the same environment, thousands of small-time decline of 45%; if the C class of low bad glue package of the aging in the same environment thousands of small-time decline of 12%; if the B category of low bad glue package of the aging in the same environment, thousands of small-time decline to -3%; glue if A class of low decline, aging in the same environment, thousands of small time decline to -6%.
Why will lead to a different assembly process to a large difference?
One major reason is that LED chips span. Occasionally a short time more than a hundred-degree heat, it is does not matter, afraid of fear in the long run in high temperatures, is on the LED chip, a great damage.
In general, the thermal conductivity of the ordinary epoxy resin is very small, so when LED light to work when the chip, LED chip to emit heat, and thermal conductivity of the limited capacity of the ordinary epoxy resin, so when you white light from the LED LED stent external temperature measured 45 degrees when, LED white lights inside the chip center temperature may exceed 80 degrees. LED node is actually the temperature 80 degrees, then, when the LED chip, the temperature in the thermostat to work when the subject is suffering, and this accelerated the aging of white light LED.
When the LED chip in the work, the core temperature of 100 degrees of heat generated, it can immediately pin through the bracket out of 98% of the heat conductivity, thereby reducing the heat to its hurt. Therefore, LED white lights stand when the temperature is 60 degrees, it may be just the chip core temperature 61 degrees only.
From the above data can be seen, choose what kind of white light LED packaging technology, LED lamps light directly determine the failure situation.
Secondly, LED lamp bead working environment temperature.
Single LED white lights under the age data, the time, LED white lights work if only one light, while the environment in which its temperature is 30 degrees, then the single white LED dimmable bulb will not work when the temperature of the stent more than 45 degrees. This time,The LED life would be ideal.
If there are 100 LED white lights lit the same time working, the interval between them is only 11.4mm case, then the LED lights around the heap of white light of the stent temperature may not exceed 45 degrees, but the center stack lighting LED white lights that may reach 65 degrees Celsius. This time, beads of LED lights is a test. So, those who gather in the middle of the white LED lights, light failure will be faster in theory, but light LED white lights around the heap, the light will slowly decline.
However, if the LED lamp beads separated by more than 25mm, then they each would not be so divergent accumulation of heat, this time, each LED white lights frame the temperature should be less than 50 degrees below, it is more conducive to LED to work properly.
If the LED tube work environment is in relatively cold areas, the average temperature throughout the year may only be about 15 degrees, or less, then the LED, the life even longer.
Or, LED work, next to a small fan blowing to help it to disperse the heat, like that of the LED's life is Tingyou help.
Anyway, we should know, LED is the span, the higher the temperature, LED life span is shorter, the lower the temperature, LED life span is longer. LED operating temperature, of course the ideal is between minus 5 to zero. But this is basically impossible.
Therefore, we understand the work of LED lamp bead ideal parameters to the design as much as possible when lighting to enhance thermal conductivity, heat dissipation features. Anyway, the lower the temperature, LED life span is longer.
Again, LED lamp electrical parameters bead work design.
According to the results, LED white lights in the lower drive current circumstances, the smaller the emission of heat, of course, also the smaller the brightness. According to the survey, LED street lights circuit design, LED drive current is typically only 5-10mA; lamp lamp beads used in a large number of products, such as more than 500, or more, the drive current is generally only 10-15mA , and general lighting applications popular LED drive current, only 15-18mA, rarely some people more than the current design to 20mA.
The results also show that the 14mA drive current, and, add the lid does not take the air, inside air temperature reached 71 degrees in the environment, the low decay products, thousands of small-time decline to zero in 2000 to 3% decline of the small time , which indicates that this low failure LED white lights to use in such an environment has reached its maximum, then it is a big hurt.
Aging with the aging of the board because there is no cooling, so, LED work, heat conduction is essentially impossible to go outside. Experiments proved this point. Aging plate inside the air temperature has reached the 101 degree heat, cover the board surface temperature of aging is only 53 degrees, a difference of tens of degrees. This illustrates that the design is basically the plastic lid does not have the thermal cooling. But the general lighting design, thermal conductivity are taken into account the function. So, in conclusion, LED flashlight beads electrical design parameters according to the actual situation, good heat dissipation heat lamps, LED drive current to increase the white light that is does not matter, because the LED lamp bead work of the moment can be exported to the heat outside, there is no damage to the LED is the best care of the LED. Conversely, if the lamp's thermal heat dissipation so-so, better to have smaller circuits, it put some heat out of less.

Today, LED lamp market to more than double the rate of growth. LED lights produce a lot of enterprises have adopted the exhibition to launch its own LED lighting products. Coincidentally, there are businesses, also said by the state "emission reduction" policy to promote, LED lighting market has been opened since last year, gradually, their company now produces annually about 150,000 LED bulbs. In fact, since the semiconductor lighting project launched in 2003, China LED industry and technology has made significant progress, initially formed from the upstream material, middle chip preparation, the downstream device packaging and integration more complete application of R & D and industrial system. According to public information, the end of 2009, China had more than 3,000 LED companies, including the extension of the upstream and more than 40 chip manufacturers, packaging companies are about 1,000 middle and lower reaches of applications enterprises 2000. 2009, LED lighting production from 94 billion in 2008 rose to 106.5 billion, increased to 82.7 billion yuan industrial scale, an increase of nearly 20%. LED lighting market for rapid growth in recent years, the reasons for San Miguel said this week due to state industrial policies and technological breakthroughs brought about by lower prices. Indoor LED lights this year, mainly due to growth in the price per 200 yuan from last year's decline to the current 160 to 170 yuan, which greatly promoted the marketing of LED lights. Currently, only a small amount of the LED lighting market in the country under the protection of energy saving policies, the majority being used in street lights and landscape lighting projects. Although the LED street lights in the country this year, show rapid growth momentum, but by the impact of high prices is still difficult to be accepted by the market as a mainstream lighting. Liu Weiguo, said: "From now on the situation, not a company's market share of more than 2%, while the LED lighting industry in China accounts for less than 10% market share." According to reports, since many companies have taken a fancy development prospects of LED lighting, flocked to the area and disorderly competition in the industry further exacerbated the chaos. The reality is that the current LED interior lighting is still only used in large factories and supermarkets, has not really entered the household, which largely affected the LED market promotion and development. On the one hand is still too high people can not afford the price of lead, the other is the "herd" the blind expansion of industries, leading to uneven product quality throughout the industry, affecting the LED light bulb in the image of the minds of consumers. LED technology to further breakthroughs in order to better adapt to the market. In addition, the Government should further increase efforts to promote LED lighting, so the next few years, LED lights will occupy the main market. In addition, the market development of LED technology also its limitations. LED heat dissipation technology is not good enough, which causes the power to shorten life. Currently, most are not long life LED power supply, up to 10,000 hours using the short LED lighting market soon usher in the spring!

Hangzhou Tower LED, including many of the world, including both well-known commercial application, and received wide acclaim. So, from the incandescent lamp - energy saving lamp-LED lights, LED lamps complete lighting triple jump How far away from our lives?
LED lights prices, technical stability is not strong
Recently, the State Development and Reform Commission heard a clear message to planning to phase out incandescent 3 years. LED lamps according to environmental protection and pollution-free advantage of the industry to judge, LED lights are expected to directly replace incandescent lamps, universal timetable can be greatly advanced. However, the price of LED lights are the majority of enterprises believe that the minds of consumers is important to the family "stumbling block."
Zhe Jiang Xiongbang money saving products Co., Ltd. General Manager's Office Director of the epicenter that the current government is actively promoting energy-saving lamps, incandescent lamps because of their prices several times higher than normal, the way the Government had to take subsidies. The price of LED lights are far above the energy-saving lamps. "There's common led bulb, the price at least 100 yuan, while the ordinary, but also energy-saving lamp with the base 20 yuan."
Reporter learned that even the most ordinary LED bulbs, the market price of at least fifty dollars or more are equivalent to more than three times the price of energy-saving lamps.
In addition, the stability of technology is also a great "weakness." It is understood that, because China is no national standard for LED lighting, the production company quite a mixed bag, many of them low-quality products. Qian said the epicenter of energy-saving lamp lighting effects, the service life of these indicators with a number of factors, such as being ignored by many manufacturers of power modules.
Trends: technological research to reduce production costs
"As our companies do not grasp the core LED technology, more applications are in packaging and, in addition to processing, the mostly homegrown in the country." Didi, a person in charge of lighting, with the domestic enterprises core technology of the chips to intensify research, LED products, prices are expected to be further reduced. According to reports, the main push of the business next year, a household LED light bulbs, is expected to price at 50 yuan.
Many people in the industry who agree with point of view. Qian said the epicenter, within three years, the price of energy-saving lamps will be controlled at less than hundred dollars, and as time goes on, LED lights cost will decline further.
Interview, a industry source, the chip price decline has already begun, the end of 2011 the cost of led light bulb illumination will be lower than the current 30% -40% decline.
Lighting, shopping malls and other properties into the competition for the object
Hangzhou Tower, Intime Department Store and other local well-known department stores, have been localized during the replacement LED lamp, a number of manufacturers involved. Didier lighting a responsible person, the company is building on the jewelry counter lighting in Hangzhou design and packaging.
Many said it will introduce the latest international energy-saving technology LED, low-frequency lighting lamp for replacement. In other words, we should replace the LED fluorescent lamp, the fluorescent lamp into LED Fixture, the energy-saving lamps, compact fluorescent light bulbs replaced with LED to replace traditional downlight LED down light ... ... The project is the New Year Power 12.7 million, saving the proportion of 52%.
An industry source said, "If the LED able to reduce the cost to the general level of energy-saving lamps in the B2B, extended to more applications, then the LED lighting market will become the absolute master of the whole."
Trend: Contract Energy Management will become the mainstream
Because of the high cost of replacement LED lamps, and high maintenance costs, very few customers will suddenly come up with such a large amount of money, so "I pay for lights installed, and the remaining tariffs will split into" has become a Let both sides accepted mode of cooperation.
This model of professional theory called "energy management contract model." Zhe Jiang Xiongbang from Hangzhou building and cooperation programs of view, do not put a point Hangzhou, capital building, the cost of all energy-saving by the corporate commitment to male bonding and male transformation of state companies to provide all the LED bulbs, and is responsible for the replacement of lamps and natural transformation damage, maintenance and so on. Energy transformation, electricity savings in proportion as agreed by the parties, the contract expires, the state of all lighting hung from the building company to Hangzhou, not charging any fees, while energy efficiency is no longer divided. According to reports, Energy Contract Management (EMC) model is expected to be widely adopted, enterprises have to rely on the profits of energy efficiency demonstration project.
Core technology from the United States and Japan need to purchase
In this semiconductor lighting demonstration project in the successful business enterprises in Zhejiang accounted for a quarter, many businesses began to good prospects for LED lighting, switch, or even cross to enter. However, the prospects for the industry is not the eyes of others is so bright and optimistic.
Didier in Hangzhou Yuhang Lighting Electronics Co., Ltd. is located in the plant, the reporter saw the production of LED energy-saving lamp is different from traditional plant business, the workshop is not the roar of machines and jet flame, more like a sophisticated electronic equipment production plant, workers We are assembling, linking one of precision parts.
According to the general manager Zhao Xiaxia introduction, in fact, the main work is done by the factory assembly, "because the energy saving lamp is the most critical parts of the chip, which is the core technology. At present, enterprises that do not grasp this technology, so it is necessary from the United States, Japan and other countries Procurement. "
The main cost of LED lights and heat in the chip material used. Single-lamp design, the share of the cost of the chip, at least in half. And 80% for foreign domestic chip monopoly, more than 50% of its costs. According to reports, Zhe Jiang Xiongbang most of the chips sourced from the United States and Japan. "This industry, at least 70% -80% of the profits are Americans, the Japanese make to go, because chip technology in their hands.
Trend:
Yangtze River Delta and other places into the LED industry gathering
It is understood that, in the "National Semiconductor Lighting Project" to promote, Shanghai, Dalian, Nanchang, Xiamen and Shenzhen, have formed a semiconductor lighting industrial base. Yangtze River Delta, Pearl River, Delta and northern Fujian China LED industry has become a gathering place. Industry, the domestic enterprises such as the core technology of the chip is stepping up its research.

"First-class profits in set standards, second-class profits in patent competition, third-rate profits in brand strategy, fourth-rate profit is price wars." 2009 November announcement of the American energy star LED light bulbs norms of landmark. It was only in the U.S. market purchase labeled "U.S. energy star authentication" mark LED light bulbs, just enjoy the U.S. government finance to the buyers the subsidy, but this is the global LED lamp industry cannot have failed to notice the first LED light bulbs norms, even for the future countries formulate domestic LED light bulbs norms of important reference.
Experts with four words generalizes the standard of core contents: 1, reduce the power factor threshold, which helps reduce cost and expand LED lamp production; 2, the prominent small power LED light bulb directly replace incandescent lamp standard; 3, clear LED bulbs for each tile bottom line; 55 lumen -- 4, clear 25,000 hours after use light failure three become limit bottom line.
In LED light bulb directly replace incandescent bulbs energy-saving is of great significance, combining now domestic chip has reached 80lm/W, combined with the energy star standard, in LED light bulb replace incandescent bulbs specifications see table below:
WangXiTian special emphasis on, it's just using home-made LED now every tile 80lm efficacy statistical results. Abroad have already announced every tile 208 lumens new LED products, incandescent lamp only each tile 15-25lm low efficiency, so use LED lighting replace incandescent lamp is an inevitable trend.
LED industry mess with malaises
LED lighting high-speed development, but a mess, such as lamps and lanterns and no people imagine life of 30,000 hours. Experts say the project will have from the following several aspects to solve industry faces questions:
1, buy photosynthetic efficiency higher LED units, note with 60 ℃ under high temperature measurement LED voltage and current data to screening. Select current consistent LED only suitable for series, to select the voltage consistent LED light supplier only suitable for relevance. At present the folk mill LED lighting factory, if do after 60 ℃ LED purchase high temperature screening, just can have confidence to next procedure propulsion, otherwise, it will cause many quality problems.
2 and small power LED lamp, a string of LED, need constant-current power supply, And medium and high power LED lamp to string together LED the constant-current power supply respectively, which is more complex, And both string and and squares network structure LED phalanx, must not only constant current and voltage power supply enough.
3, LED lamp of enemy is high temperature, LED unit volt-ampere characteristics in different temperature is there is a considerable difference between. So in addition to ℃ conditions in 60 screening LED respectively applied for LED series and parallel besides, still need to have temperature monitoring and compensation, just can use cooling measures to control the temperature LED light bulb as low as possible. LED temperature is higher, the low efficiency is inversely proportional to the temperature and the photosynthetic efficiency, LED temperature is higher, the greater light failure is inversely proportional to the temperature and life. Not exaggerated said, who master LED lightbulbs heat price and good structure, who got the advantage LED lamp industry's confidence guarantee. Leds power adapter, attention electrolytic capacitors this sensitive to temperature devices: CNGC electrolytic capacitors logo 85 ℃; Industrial electrolytic capacitors temperature marks ℃ 105, Professional level product electrolytic capacitors logo temperature ℃ above. 125 A penny a minute goods, high reliability need from buying electrolytic capacitor start careful.
4, LED tube and lanterns is the combination of science and art, including lights "lux" (lux for units, such as corridor lights under 15 lux, desk and church desktop must have 60 lux above just satisfaction).
And "color temperature" "color rendering" and whether need dimmer and so on optical requirement and meets the eye and psychological need. For this purpose, the LED lamps and lanterns itself needs to have power electronics and thermodynamics considerations, but overall, and cost limits and volume requirements limits, etc. Say so, LED light manufacturer portal easy, the threshold is not high, easy to occur YiHongErShang, encounter the art, light, electricity, thermodynamics specific questions, and will have a multi-channel GouKan, once a shuffle.
Nowadays LED lightbulbs orders often required power factor more than 0.9, but someone don't agree with this requirement. Fluorescent electronic ballast used extensively, forming social consensus: power factor the higher the better. But in order to improve the power factor to improve the cost of production and sales, which are disadvantageous. Besides, fluorescent lamp is depression arc discharge lamp, is negative resistance properties of the source of the light in the B2B, for power environmental protection (harmonic problem), EMC problem is very outstanding. However LED is positive resistance properties of light, LED lamp itself does not exist EMC problem, it is only for LED the constant-current power adapter service. If use switching power supply, EMC problem occurred. U.S. grid commonly have online harmonic compensation devices, so for 5W or less than 5W LED lightbulbs no PF request, even more than 5W LED lightbulbs, also reduce threshold only request reaches 0, seven or more. Don't add active power the same number of compensation APFC switching power supply (EMC problem that will lead to a lower cost of production), very favorable. This is to promote LED lights bulb production two popular standard tenet.