IACS CO., LIMITED (Yiwu Fuwei e-commerce firm)

News Center
Contact Us

Contact Person: Frivy Flex

E-mail: Frivy.Flex@iacslight.com

skype: fobfrivy@gmail.com

Add: Pengjiang Distribution, Jiangmen City, Guangdon Province, China

industry knowledge

Who makes LED applications return to light quality?


With the growing maturity of material technology, manufacturing technology and application technology of lighting grade LED light source, the problem of environmental deterioration becomes more and more serious one day after several years, and the economy develops disorderly. Under the great pressure of energy saving and emission reduction in the world, the lighting application of LED is finally ignited. The reason for the ignition is not because of the LED institute. The light emitted is excellent, but because of the energy-saving nature of LED. Based on this point, government policy guidance, media boost, investment influx, and related unrelated manufacturing enterprises have changed their production and intervened in time, regardless of whether the technology is feasible, the ability is sufficient, and the conditions are available. A few years later, all the LED will rush. With the energy-saving of LED, the support of national industrial policy, the magnificent "strategic emerging industries" to seize the city, site layout.

However, for the sake of energy saving of LED, who has cared about the quality of light in the application technology of LED seriously?

All right! The country said that LED energy saving should be promoted, the national policy is being done, and the time of death of traditional incandescent lamps is set. The road map is also very clear and clearly implemented as planned. It is hoped that "energy-consuming" incandescent lighting will be given up to LED lighting, and the road lighting parts of all cities will be taken as "experiments" of LED lighting application. ” Shooting range, now you believe, believe that the world of LED is vast, the prospects are optimistic and happy, so the continuous influx of "energy-saving" LED lamps neglect to do "light"! Look at all the urban roads with LED street lights installed up to 2014. How about the light quality?

Optical parameter part

Light distribution, glare index control and other indicators were seriously ignored by many LED manufacturers before 2013, but blindly pursue brightness and illumination.

The control of glare index puts forward strict requirements for LED street lamp. It requires LED manufacturers to design and distribute light, which is a difficult contradiction and unity. For example, the glare produced by 120 degree and 140 degree luminous angle can not be different from each other. The owners of the municipal sector also believe that LED street lamps with wide light-emitting angle can reduce the number of lamp poles per kilometer. This demand is real, but the application contradiction also exists. Perhaps, this problem is still pending.

The choice of lens material is not a good idea for LED street lighting. For the problems of wear resistance, high temperature resistance, ageing resistance, deterioration and pollution resistance in various use environments, photorefraction and color change are also caused in the application process.

For the application of LED, there are still many problems. For example, when the blue light of LED is mixed with the Yellow phosphor, the white light is obtained, and the red light is absent in the spectrum. Does the blue-rich LED light cause harm to people when they are exposed to this kind of environment for a long time? The color temperature deviation, redness and greenness caused by the reasons of process and material quality still need those who are engaged in LED application technology to stop the progressive technical thinking of serving low prices, return to the craftsman's mentality, make light, and make satisfactory applications.

For the development of LED industry, Cai Ming believes that everything listed as a national strategic industry is basically very miserable. Everyone in the wind, first fight concept war, mature and then fight price war, the winner is to get government subsidies and mixed listing LED. At that time, when I saw that the photovoltaic industry reached the lighting level, I overturned my recognition of semiconductor light emitting diodes instantly. At that time, I had the desire and impulse to kneel down to the LED. So I fell in love with the LED crazily and all the applications related to the LED. Of course, I didn't know that the LED which entered the strategic emerging industry would come into being again. What subversive effects (or consequences)?

From the original application state, or from the beginning of basic business, I feel the change of LED application. At that time, in order to promote LED, local policies and national policies have introduced "special subsidies for science and technology" projects.

There are two reasons for this:

One is to promote the application of LED by means of policy and subsidy support.

The second is to dilute the extremely high price of LED lamps at that time.

Its representative policies include: special subsidies for high-tech, ten thousand cities, one hundred thousand stores and other technology application projects.

At that time, subsidies and support policies issued at the national and local levels revolved around the so-called national policy of "energy conservation and emission reduction". As a result, the craziness of LED, from the above positive factors let people crazy into, this craziness is not necessarily directed at energy conservation and emission reduction, but towards the support of national policies, because of this craziness, the energy-saving effect of LED is really like apropaganda god?

Actually not! The energy saving ratio of LED to traditional lamps and lanterns is absolutely no more than 65% of the times that most people publicize. At this time, the country's good policy on LED, crazy boasting, first of all, let the manufacturers of LED in the crazy cover up, ignoring the authenticity of LED energy-saving technology, which I want to say, under the policy "call" of the LED people, let the LED in the direction of application for the first time appeared "mistaken zone", or "misguided".

In business mode, LED is used in contract energy management project (EMC). Is it successful in project performance? Does the contract energy management project for lighting energy conservation achieve corresponding economic benefits?

As mentioned earlier, when you think that the LED world is vast and the prospects are optimistic, there is a constant influx of energy-saving LED lamps and lanterns that neglect to do "light"! No attention has been paid to the quality of light, how many non-professional people in the LED manufacturing industry are making non-professional products!

I remember that Zhang Haiweizhang always asked about the encapsulated light source: Did the LED lamps succeed in every round of application?

Yes, it seems successful! Look at the overwhelming number of LEDs, the number of applications growing, with policy tools, success...

However, the successful LED, which is half of the LED powder in my home, installed the LED lights again, and removed them again.

The reason is feeling, the sense of light, professionally speaking, is light sense!

During the day, I had enough of the LED light in the office and felt very nervous when I came back home. Maybe it was because of the blue-rich LED. When I communicated with Raymond Zhang, I found the answer to the sensitivity of the LED: most of the LED light was lack of red light, which seriously affected the saturation of the light, so I was very tight to the LED light for a long time. Zhang then rose.

So, did engineers pay attention to this optical quality in the first round of applications?

In fact, it is very clear that the industry of LED is a "freak" industry, from the industry perspective, there is a situation of cooperation and competition, because the packaging of lamps and lanterns at any time downstream extension, make kits at any time may become a strong member of the industry.

Another industry fact is that you currently have disruptive technology on hand, useless, application point has not reached this point, no large-scale applications affect the large plate of LED.

If rectangular lighting has become a laughing stock in the industry since it adopted the power supply scheme of "resisting capacitance and reducing voltage" a few years ago, can anyone laugh at this application now?

Many years ago, Dongguan Shilong andShipai took the lead in utilizing the LED street lamps implemented by the subsidy policy. At that time, they drove and swayed to these townships from time to time to see the LED lights. The feeling of walking under the moon was very satisfying, but after half a year, they felt that the lights of some sections of the roads in these townships were green at the edge first, and grew more and more with the passage of time. Green,

At that time, it was joked that green LED is green lighting, but joking, from the perspective of application technology, it is questioned whether white light from yellow phosphor of blue LED chip is technically reliable.

With the termination of "Guangdong Province Promotion and Use of LED Application Program" in 2013, the project implemented under the contract energy management mode gradually ended. One night in 14 years, I was driving around Shenzhen in the street. I remember that I wandered for more than two hours. When I returned to the hotel, I found that the lights in the lobby and room were dim. That's because, in the first stage, LED street lamps are widely used, and glare control, one of the defective technologies of products, is unsatisfactory.

So I have a "large angle lighting based on the owner's pressure and exaggeration of the LED can save the number of lamp poles per kilometer." We have achieved a large angle lighting, but can not control the glare.

At that time, I also evaluated the so-called "the brighter the better" COB street lamp model section in a section of Zhongshan Torch Development Zone. It was found that under the bright white lighting environment, people coming from the second lamp floated like paper, which was also the cause of glare. Moreover, the luminous characteristics of LED had not been well matched, which made me ghost. Now. That is to say, one of the unsolved problems in the first round of application is glare control.

optical material

PMMA, the optical transparent material used in all our LED lamps, is definitely not a good idea for outdoor lighting products. No matter how advanced the material is, no matter how powerful the technology is, PMMA is helpless in terms of UV resistance, heat resistance, aging resistance, wind and sand resistance and acid pollution resistance for a period of time. An application experiment has been done near the Flame Mountain in Xinjiang. The wind blows sand for a long time. Congratulations. It is absolutely cost-effective to create a sand blasting effect for the lens. But in the application of LED lamps, this effect makes the LED produce a kind of "photorefraction" like light fading.

After the hot summer sun exposure, the LED street lamp body is aluminium alloy. When the ambient temperature is 50 degrees, the temperature of the aluminium alloy lamp body is more than 70 degrees. Under this temperature condition, the lens begins to soften, then blows through the wind, circulates for a long time, and looks at the street lamp for a period of time. Where can we see the original shape of the lens? It hangs like a tear in the wind and has a strong directivity. At that time, it looks blue.

So whenever I meet an optical instructor, I ask this question: Can optical lenses use glass?

The answer is unsatisfactory, either because the transmittance of glass is low, or because of the difficulty of light matching and shaping. Is that true?

Chen Bingquan thinks that since the upper, middle, downstream and peripheral parts of the LED can form an industry, lens materials can also be made of glass, but the quick success and instant benefit in application technology lead to PMMA becoming the indispensable material for LED lamps. Now vacuum forming and purification technology can make glass become the king of optical materials.

Speaking of optical lenses, Tong Yuzhen, an industry insider, believes that glass is of course the best choice for optical lenses. Hardness, good light transmission, no water absorption, strong corrosion resistance. However, there are some difficulties in fabricating conjoined lenses. But PMMA is much easier to process than glass.

In addition, Chen Rongming, an industry insider, also said that there is already optical glass technology in the headlights of automobiles, and lenses can think in this direction. In this regard, Cai Ming believes that the asymmetric light distribution of street lamps is relatively difficult to do, the yield is low, the latter depends on polishing, and the cost limit is too low. Before looking for automobile glass manufacturer to do, but did not come out, later still looking for a professional LED glass lens manufacturer with more than ten years of experience to do.

Let the application return, can not be separated from the efforts engaged in the research of LED technology sticking to the ground, so that the "big lighting" family of LED products return to the ultimate lighting.

Yiwu Fuwei e-commerce firm (IACS Co., Limited) is a very professional Led manufacturer who produces high quality outdoor led light. Our popular products are solar led lights, UFO lights, underwater lights and so on. If you have any question about the led product, please feel free to contact us.