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LED application who let it return light quality?
- May 12, 2017 -

LED application who let it return light quality?

 

With the lighting level LED light source in the material technology, manufacturing technology, application technology is maturing, a few years later one day based on the problem of environmental degradation is increasingly serious, the economic disorderly development, the world's energy-saving emission reduction pressure on the reality, LED Of the lighting application has finally been the point of explosion, the reason is not because of the explosion of LED light issued by how good, but because of the energy-saving LED, based on this, the government policy guidance, the media fueled, investment influx, and The relevant unrelated manufacturing enterprises have to switch to timely intervention, do not ask whether the feasibility of the technology, the ability is sufficient, the conditions are available, a few years after a LED, are directed at the energy-saving LED, the national industrial policy support, Strategic emerging industries, "the magnificent and siege, set the layout.

However, everyone out of the energy-saving LED considerations, who has seriously concerned about the LED application technology in the light quality?

OK then! The country said that LED energy saving should be promoted, the national policy is done, and set the traditional incandescent lamp death time, the road map is also very clear and clear as planned, is to "energy" incandescent lighting to LED lighting , But also come up with all the city's road lighting part of the LED lighting applications as the "experimental" range, which you believe, and believe that LED world is broad, promising optimistic, so the influx of "energy" LED lighting ignored "Light"! Look at all the implementation of the installation of LED lights as of 2014 the city road, light quality?

Light parameter part

Light distribution, glare index control and other indicators before 2013 by a number of serious LED manufacturers ignored, and blindly pursue the brightness, illumination.

Glare index control on the LED lights made stringent requirements, the need for LED manufacturers in the lighting design and light distribution design, is a difficult contradiction unified, for example, 120 degrees of luminous angle and 140 degrees of light generated by the glare can not The same day. Municipal owners also believe that LED wide light angle of the LED lights can reduce the number of light per kilometer, this demand is real, but the application of contradictions also exist, perhaps, this problem has been pending.

The choice of lens material for street lighting with LED lights is not a good idea! For the existence of a variety of different use of the environment, wear, high temperature, anti-aging, deterioration, anti-pollution and other issues in the application process also led to light damage, light color changes and other issues.

For the application of LED, there are many problems, such as LED blue light and yellow phosphor mixed with white light, the lack of red light in the spectrum, LED light is due to the rich blue and long-term activities in this way to pick the environment Does it cause harm to people? The cause of the process and the quality of the material caused by the color temperature deviation, reddish, partial green, etc. need to engage in LED application technology to stop the low-cost service for the continuous improvement of technical ideas, return to the mentality of craftsmen, Satisfactory application.

For the development of the LED industry, industry professionals Cai Ming that everything is included in the national strategic industry are basically miserable, we litters on the first play the concept of war, mature and then hit the price war, the winner is to get the government Subsidies and mixed with the market of the LED. At that time to see the ground on the photoelectric to reach the lighting level, the moment to subvert their understanding of the semiconductor light-emitting diodes, there was a desire to kneel down to the LED and the impulse to frenzy in love with the LED, love and LED-related All applications, of course, then did not know into the strategic emerging industry status of the LED, will produce any subversive effect (or the consequences)?

From the original application state, or that I start from the basic business stage, the application of LED changes in the feelings. At that time, in order to promote LED, local policies, national policies have introduced "special subsidies for science and technology" project.

There are two reasons:

First, the use of policy instruments, subsidies to promote the use of means to support LED applications;

Second, dilute the price of LED lights at high prices

Its representative policies are: high-tech special subsidies, ten city ten thousand, hundred cities and so on thousands of shops and other technology applications.

At that time all national level, the local level of the introduction of subsidies to support policies around the "energy-saving emission reduction," the so-called national policy to start. Thus, LED crazy, from the above factors make people crazy to enter, this crazy is not necessarily directed at energy-saving emission reduction, is directed at the national policy to support, because of this crazy, LED energy-saving effect Really propaganda like God?

actually not! LED on the traditional energy-saving lamps, absolutely no publicity in the number of occurrences of more than 65%. At this time, the state of the LED good policy, crazy boast, first of all to let LED manufacturers in the crazy cover, ignoring the authenticity of LED energy-saving technology, which I want to say, LED people in the policy of "call" Let LED in the application direction for the first time a "misunderstanding", or "misleading"

In business mode, LED is used in contract energy management projects (EMC), as to whether the project performance is successful? Engaged in lighting energy-saving contract energy management project whether to obtain the corresponding economic benefits?

As mentioned earlier, when we think that LED world is broad, promising optimistic, the influx of "energy" LED lights ignored "light"! Did not pay attention to how the quality of light, LED manufacturing industry, how many people do not professional do not professional products!

I remember, Zhang Haiwei Zhang on the packaging of the light source question: each round of application down, LED lighting success?

Yes, it seems to be successful! Look at the overwhelming LED, looking at the application of growth figures, accompanied by the policy means, the success of the ... ...

However, the success of the LED I was half of the LED powder home again installed the LED lights, once again removed.

The reason is feeling, the feeling of light, that is a professional sense of light it!

During the day in the office has been enough of the LED light, back home feel very nervous, perhaps the LED involved in the rich blue, with the Raymond Zhang exchange, the words let me feel sensitive to the LED answer: LED Everbright Part of the lack of red light, which seriously affected the light saturation, so a long time facing the LED light, my tension will be the sky.

So, this light quality in the first round of the application, the engineers have not been concerned about?

In fact, we are very clear, LED industry is a "freak" industry, from the industry side, there is both cooperation and competitive situation, because the packaging at any time to extend the downstream lighting, do the kit at any time may become the industry tough Of a member.

There is also an industry fact is that you are now on hand with subversive technology, useless, the application point has not yet reached this point, not the size of the application of the impact of the LED plate.

Such as the long side of the lighting a few years ago, "resistance to pressure buck" power program out of the quality of the accident has become a laughing stock in the industry, so now look, there are people dare to laugh this application?

Years ago, Dongguan Shilong, Shek Pai took the lead in the use of subsidies to implement the implementation of the LED lights, that time from time to time to drive to the two towns to see the LED lights, that kind of feeling like walking under the month so very satisfied, but after six months , Feeling the lights of some of the two sections of the road first green hair, and with the passage of time more and more green,

At that time was joking that can be issued green LED is green lighting, but joking joke, from the application of technical point of view questioned, issued a blue LED chip point of the yellow phosphor is white technology is reliable?

With the 2013 "Guangdong Province to promote the use of LED application program," the termination of the contract energy management model of the implementation of the project gradually ended, 14 years of a late night in the streets of Shenzhen driving wandering, remember to wander for more than two hours , Back to the hotel and found that regardless of the lobby of the light or the room lights are very dim, it is because the first stage to promote the application of LED lights, product defects in one of the glare control technology is unsatisfactory.

So I have "based on the pressure of the owners and exaggerate the large angle of LED light can save the number of lights per kilometer of light," we do a large angle light, but no way to control the glare

At that time, it was also on the Zhongshan Torch Development Zone, a so-called "the more bright and better" COB street lamp model sections of the evaluation and found in the bright white lighting environment, from the second light came like the same as the paper, But also glare to blame, there is no light out of the LED characteristics of a good light distribution, let me live a ghost. That is, the first round of application problems did not solve the problem is one of the glare control.

Optical materials

It is definitely not a good idea for our outdoor lighting products to use PMMA for all LED lamps. No matter how advanced your technology is Niubi, it is resistant to UV, heat and aging. , Acid-resistant pollution in a period of time after the use of helpless, many years ago in Xinjiang near the flame of the mountain to do an application test, sand blowing a long time, congratulations, this use of the environment if the lens made a sandblasting effect absolute Do not spend the cost, but in LED lighting applications, this effect allows the LED to produce a kind of light failure "light damage."

And then by the hot summer sun exposure, LED street lamp body is aluminum, when the ambient temperature is 50 degrees, the aluminum lamp body temperature is more than 70 degrees, the lens in this temperature state began to soft, and then by the wind A blow, a long time to cycle, a period of time to see the lights, where the lens can see the original look? It is like a tear hanging with the wind, with a strong point of view, then see his face green.

So every time I met the optical instructor asked the question: whether the optical lens can use glass

The answer is not satisfactory, or that the glass light transmission rate is low, or that light distribution difficult ... ... really so?

Chen Bingquan that, since the LED on the middle and downstream accessories and the formation of the industry, the lens material can also be made of glass, but in the application of technical quick success led PMMA LED lamps can not be separated from the material, and now vacuum forming, Technology can make the glass can become the king of optical materials.

Speaking of optical lenses, industry people Tong Yuzhen that optical lenses using glass is of course the best choice. Hardness, good light transmission, no water absorption, strong corrosion resistance. However, in the preparation of Siamese lenses, there are difficulties in processing. But PMMA is much easier than glass processing.

Another industry person Chen Yiming also said that there have been put in that car headlight optical glass technology, the lens can be in this direction to think. In this regard, Cai Ming that the asymmetric light distribution is difficult to do, low yield, late by grinding, the cost limit is too low. Before looking for car glass manufacturers to do, but did not come out, and later still find a decade experience in professional LED glass lens manufacturers do it.

So that the application of regression, inseparable from the LED technology to paste the efforts of gas research, so that "big lighting" family of LED products return to the ultimate lighting.

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