作者：Blade

chinese led manufacturer in 2013

Clearly, LED has a very significant advantage in the energy efficiency and the working life. LED bulb requires only one third of the electricity consumption, can provide almost the same light emission amount with conventional incandescent and fluorescent lamps. Compared with the more mature technology-based products, the service life of the LED bulb is expected to more than 20 times higher. LED bulbs in the solid state components than the relatively fragile traditional lighting technology, provide better protection of mechanical damage. Together, these features provide attractive investment returns (ROI) for the users of LED lighting products, especially for maintenance and bulb replacement is more difficult and / or expensive commercial and industrial applications chinese led manufacturer.

In the past about 150 years, the lighting industry has developed into a large-scale production industry based on standardized bulb, lamp design has inherent outdated. Consumers find themselves often use the same new products to replace short-lived in the product. This trend with a small number of large manufacturers are inseparable, they are through to the hundreds of millions of low-cost manufacturing of a product to meet the needs of the market.

With the lighting industry’s transition to Power LED Flood Lights technology, whether this business model can continue to maintain their best interests? And whether it is able to take advantage of the basic advantages of solid-state lighting chinese led manufacturer?

 


chinese led manufacturer in 2013

May be associated with a longer working life of the technology is equally important, the greater efficiency and a more solid design is the LED having architectural flexibility. For example, the lighting designer can select a point light source LED lights to make it around a shape distribution, rather than the light source together diffuser and mask will be distributed to where it is needed. These features give lighting designers unlimited freedom of design, innovative way to design the light source. Product developers LED lighting products can be made ​​into any shape, or lighting embedded in building materials, walls or furniture. They can be more accurate directional light source, or more easily control its intensity or color, to create a dynamic lighting environment. Some manufacturers have developed a windows prototype, which is transparent in the daytime and by clever use of the material of the LED chinese led manufacturer, and different refractive indices, which will emit light at night.

 

 

To do appropriate measures and the development trend for led industry

At present, traditional lighting still occupy absolute market share advantages. LED lighting market penetration is still very low, the latest information indicates that the LED lighting market penetration is only about 7%. The reasons are mainly the following:

To do appropriate measures and the development trend for led industry

1. The high price of LED lamps.

2. promotion lag.

3. Retail Distribution does not put in good force.

At this stage, led industry lighting companies should not only focus on application-oriented product development, but also pay attention to brand building. At present, most LED lighting companies play the “green energy”, “low attenuation”, “long life” concept, but it has not be acceptable to the majority of consumers. The market are flooded with cheap inferior products, which seriously affect brand of LED lighting credibility.

Businesses want to do appropriate measure.

2012 was a reshuffle year for terminal dealers, “the strong get stronger and the weak are eliminated,” the general trend is hard to change. Can I get through in this winter? and it depends on the financial strength of the business and the business model of the lamps. On the circumstances that the country’s major flow decrease each year, if the business still wait for the client to send home, it is undoubtedly the worst response. While for the led industry lighting companies, they are also facing the problem. The pipeline provider can not be found in the terminal. At present, many LED Tunnel Light companies have chosen to open outlets. Such as shellfish crystal semiconductor lighting in Shenzhen Parc Oasis Lighting City opened factory outlets directly.

LED pipeline construction trends

How to blaze a way out when one enterprise does not form the industry standard, and in a full of the cohabitation quality LED market? Quality is the key to victory, and also product reputation and brand symbol, and LED terminal market in the next competition will be the brand competition .

1, the development of led industry store.

2, on the Major Lamps City or city building stores sell lamps as a trial. Or operated in cooperation with local core dealer, but in the short term the mode of promotion efforts should not be too great.

3, part of the LED lighting business cooperate with the well-known brand  and well-known brand of Direct stores Distribution.

supernova led grow lights inhibition of urban crime

The American Austin City Police Department and Austin Energy Energy Board cooperation to protect the residents of the city. Since a significant increase in violent crime rate in mid-2011, the two institutions plan fitted with LED lighting, the prevention of crime in the U.S. city of Austin, the three most dangerous locations. supernova led grow lights are normally used in these kinds of projects.

Austin Energy spokesman Carlos Cordova, announced that a well-lit place is usually not an offense has been committed, because when you want to do bad things and nobody seen.

In accordance with the requirements of the city’s Police Department, Austin Energy erected 25 LED lights. The new LED bulb illumination is brighter than the old bulbs. Cordova said good lighting environment, people can be assured of recreational activities, no need to worry about security issues.

supernova led grow lights are also some kinds of inhibition of urban crime.

supernova led grow lights inhibition of urban crime

Austin, 8 and 9 of the street lighting test results are very successful, this lighting project is one of a series of policies against urban crime. The growth of violent crime by 15 percent from 2011 to January 2012, July, violent crime only grow by 7.8% next city a larger project, 70,000 lamps will be updated by Austin Energy budget expenditures.

It is reported that this new LED lighting products to reduce the crime rate, the earlier countries into Japan, called LED guard against light, has been gradually applied in street alleys to replace fluorescent lamps mainly traditional street lights. supernova led grow lights are also one of the important models for the modern cities to show the updated technology. Also, you could find led flood lights in these big cities, for example, in Shanghai, China, thousands of LED Flood Lights are installed in different applications, projects.

In addition, studies have pointed out that the blue light, that people can more calm, and some of the LED light will also guard against taking blue, white separate configuration. Based on the technology now, using LED is saving more money and better maintence cost, also, the life span of led products would be about 50,000 hours, much longer than any other lighting products.

 

Be optimistic about the LED industry

In a short period of time, there are more than three enterprises who have closed their doors due to financial crisis. But at present, it came the Haobo photoelectric involved financial crisis. The operating income of Haobo Optoelectronics Co., Ltd., in Shenzhen had about 200 million yuan last year, just one year on the market, the market have spread-ed the message of shutting LED industry down.

be optimistic about led industry

Operational problems caused the enterprise funds strand breaks

On November 5, the media reports said, Haobo photoelectric closed for huge amount of money owed ​​suppliers and employees wages. After the report came out, Haobo photoelectric chairman Zhao Hui responded that the enterprise did not lay-off before, just days off. He also promised that he will resolve the wages and salaries as soon as possible, and the gradual repay the amounts owed ​​to suppliers.

Reporter does not contact Zhao Hui, but we contact one of the shareholders of the Haobo photoelectric Wang, Mr. wang introduced the predecessor of Haobo photoelectric was founded in 2006-a the technology company. From 2008 to 2011, it has been very good business development trend. Last year’s sales reached $ 2 billion.

At present what problem does the company encountered? ” The main problem is money. ” Mr. Wang said, In September, the company delayed wages, and in October the company capital chain had problems, ” money does not move, and can not buy materials “. Mr. Wang thought that the main reason that lead to company capital category to rupture is the confusion of management, financial turmoil. It is the management problem caused the enterprise capital chain rupture. According to introducing, the orders in Haobo photoelectric have been very abundant, the main cause of factory production shutdown is that the company owed suppliers’ money, which LED Panel Light to the supplier for collective broken.

“Is there any possibility to return for work?” Mr. Wang said: “most of the workers were gone, enterprises will not restart, the company must wait for introducing new investors, there will be a new progress. ”

Mr. Wang said he was very optimistic about the LED industry. From the industry photoelectric performance in recent years, LED development trend is benign, once the company start moving, he has the confidence to repay supplier’s payment gradually.

LED diode is in hot water

Now, even we do this upstream fluorescent powder materials which are owed money. ” Talking about the LED industry of trigonometry debt, Li Yi (a pseudonym ): ” cherish a deep-seated hatred for business when you speak goods to the payment, but once the goods to customers, have a heap of reason prevaricate. ”

LED diode is in hot water

 

Li Yi is one of the main LED Down Light fluorescent powder materials company general manager, before a few years the rapid development of industry to the company to bring rich and generous profit, in recent years the company is planning a listing. But recently, the industry of triangular debts continue to spread.”
Equipment factory and factory lamps used a longer account period, but our material factory previously used in a short period of time to pay, we buy rare earth material is to use cash to. we can not be timely recovery of cash, cash is difficult to continue. ” Li Yi told the Securities Times reporter, phosphor material manufacturers is bigger, and the majority of the cash transaction, if the downstream firms credit seriously, be equal to enterprise interest-free support customer operating funds, but also take the price risk of rare earth. The funds for the weak strength of small and medium-sized enterprises, especially prone to cracking of the capital chain.

In fact, this chain of debt risk has partial exposure. By the end of 2011, with Shenzhen Jun Tatsutaro as the representative of the group of Southern China region led diode display because the enterprise fund chain break and close down in succession. November of this year, photoelectric closed after about 20 million of the payment in arrears discovered, supplier surfaced, Southern China, East China and many listing Corporation are temporarily which will be unable to recover.

At present, the company involved in the LED industry innumerable, industry chain debts have spread. Only from a public information listing Corporation, as of the three quarter of this year, with the led diode industry in the 21 listing Corporation accounts receivable balance total up to $5519000000, payable balance reaches 34 million RMB, the company total accounts receivable already accounted for the first three quarters of the total revenue 89.13%.
At present, some listing Corporation put part of accounts receivable to commercial bills, so from the results we can seen on the amount.
The company knows the credit funds smooth Road, on the supplier psychology. ” A lot of downstream manufacturers are no cash payments to suppliers. Supplier has no way, do not continue to supply means that the inventory backlog and carrying a loss. ” A domestic chip companies responsible person said reluctantly.

Design principles of LED display divers

Large screen area is always a part and parcel of LED industry, an important part of large entertainment, sporting events, square theme display. Full color screen technology maintained a rapid development since the birth of blue-ray LEDs. LED plays a positive role in the outdoor decorative display market, with obvious expending trend. China is the largest producer of LED screens, from LED chips, to LED display divers, LED display controllers, screens, China’s products take the dominate position in the global market in almost every respect.

 

Large screen area is always a part and parcel of LED industry, an important part of large entertainment, sporting events, square theme display.

 

16-bit shift constant current IC is most commonly used module in LED display divers. Black-and-white screens are text-display-based. Microcontroller scanning was more convenient. With the increase of the number of LED chips, in order to save O/I ports, engineers started to adopt 74HC595 shift scanners. Based on this, engineers then integrated constant current setting function, which can improve the current driver capability. Finally, 16-bit shift constant current IC was created and adopted by full-color screens, which is more in line with demand.

 

Essentially, the driver capacity of LED display divers was continuously reducing. Earlier TLC5940 has a output driving current as high as 120mA (single line). Followed by TB62726, ST2221, MBI5026, the driving current of which was declined to 80-90mA. The current driver for LED screens has a driving current of 45mA, like MBI5024 and CYT62726, mainly because of the increase of LED High Bay output luminance (brightness).

 

At present, about 80% LED screens in the international market was produced in China. 16-chiannel constant current designs are commonly used, and will not be replaced in short term. All supporting technologies are mature, plus the serialization of products, expect for large innovations in control systems and driver designs, 16-bit shift constant current IC will hardly be replaced. In recent years, many companies continuously introduced new architectures, which were not recognized and accepted by the market. Lacking of innovations in control system is the largest problem. For example, changing color consistency of LEDs without any major breakthroughs on the new technology will have very little attraction in the market. It is expected that the mainland chip design companies will occupy the LED display market, just like SILAN AZURE, which has become the largest suppliers of mainstream LED display chips. Their products have good qualities and satisfied assurance.

Characteristics of high-power LED package

High-power LED package has been a hot research topic in recent years, due to their complex structures and production process and directly effects on the performance and lifetime of LED chips / LED lamps. The selection of LED packaging methods, materials, structures and production process is mainly determined by chip constructions, optical / mechanical characteristics, special applications and costs. After 40 years of development, LED package technology has gone through four major stages: Lamp LED, SMD LED, Power LED Tubes and COB LED. With the continuous increasing of chip power, especially the developing demand of solid-sate lighting technology, high-power LED package need to meet more restrict requirements in the aspect of optical parameters, thermal parameters, electrical parameters and mechanical structures. In order to effectively improve the luminous efficiency, new ideas and design concepts need to be adopted.

 

High-power LED package has been a hot research topic in recent years, due to their complex structures and production process and directly effects on the performance and lifetime of LED chips / LED lamps.

 

Phosphor powder plays a role of color mixing and white-ray creating in the LED package. Their major characteristics are size, shape, luminous efficiency, conversion efficiency, stability (thermal and chemical) and so on. Luminous efficiency and conversion efficiency are key points. It has been proved that, with the raise of temperature, the quantum efficiency of phosphor powder will be reduced, as well as the output luminance. In the mean time, the wavelength will be changed, leading to variations in color temperatures. High working temperature will also speed up the deterioration of phosphor powder. Phosphor powder is coated by epoxy and silicone rubber mixtures, the thermal conductivity of which is relatively poor. When exploded under violet rays or UV rays, phosphor powder will be easily deteriorated. Besides, high temperature also exerts bad influences on thermal stability of encapsulants and phosphor powder. Generally, the refractive index of phosphor powder is larger than or equal to 1.85, while the refractive index of silica is around 1.5. Due to the unmatched refractive index, light scattering phenomenon occurs on the surface of phosphor particles. This problem can be improved by adding nano phosphor in the silica gel, increasing the refractive index to 1.8 or more for the later and increasing the luminous efficiency by 10%-20%.

 

Overall, in order to improve the luminous efficiency and reliability of LED chips, especially high-power LED package, encapsulation layers tend to be gradually replaced by phosphor practices with high refractive index. By doing so, both the uniformity and packaging efficiency can be improved dramatically.

Ten advantages of LED fluorescent tubes

The luminous efficiency of fluorescent lamps is about 55-80lm/W (the luminous efficiency of Philips T8 tubes is 72lm/W). LED fluorescent tubes can have a luminous efficiency as high as 100lm/W. Cree has announced that the luminous efficiency of their recently promoted XLampXP-G series can reach up to 130lm/W, and expected to reach 150lm/W two years later.

 

The luminous efficiency of fluorescent lamps is about 55-80lm/W (the luminous efficiency of Philips T8 tubes is 72lm/W).

 

Not all light emitted from LED chips/LED lighting boards can 100% reflected by reflectors / projectors. Fluorescent tubes can send out 360 degree light. In spite of using reflectors, some of opposite direction light will be inevitably wasted. Generally speaking, there will be about 30% light will be wasted for fluorescent tubes. The valid / lamp luminous efficiency of them is only 70% of the initial luminous efficiency. The general beam angle of LED fluorescent tubes is 120 degree. Almost all light is effective with the help of reflectors. In the view of many manufacturers and users, 120 degree is a narrow beam angle for fluorescent tubes. But this is enough in practical cases. As we mentioned before, the luminous efficiency of Philips T8 fluorescent tubes is 72lm/W, 36W fluorescent tubes can have an output luminance of 2592lm. Then the lamp efficiency of traditional fluorescent tubes is only 70%. Thus the valid luminous efficiency of the entire lamp is about 1814.4lm. Assumed that the luminous efficiency of LED fluorescent tubes is 100lm/W, a 18W LED tubes can have a output luminance of 1800lm. Sending out light with the same brightness, LED Tube Lights only consume half power than traditional fluorescent tubes do.

 

High power efficiency: All lights except for incandescent bulbs need special power supplies, including LED lighting products. Therefore, we need to take into account of power efficiency when we estimate the whole lamp efficiency. Take Philips 36W T8 fluorescent tubes for instance, the rated power of which is 36W. But as a result of accessing to magnetic ballasts, the actual measured power is 42.4W. The rest 6.4W is consumed by core inductors. Efficiency decreases to 85%. Most of domestic core inductors can consume more than 10W power due to their low quality, the power factor of them is lower than 0.512. Normally, the power efficiency of LED drivers / power supplies is as high as 90%. One 18W LED tubes only need a driver with output power of 20W. And the power factor is 0.9.

Major achievements of LED emergency lighting technology

“Studies of efficient driving technology and reliable system of emergency lighting applications” issued by Beijing University two years ago was concentrated on light source design, package technology, driver control circuit design and emergency lamp body design. After 2-year study, the research group developed new LED-related indoor emergency lighting devices with corresponding driver circuits and lamp body designs. In the mean time, the research group also participate the development of outdoor emergency lighting devices. Adding sound and light alarms, information indicators, direction guides on the basis of the original lighting features.

 

Studies of efficient driving technology and reliable system of emergency lighting applications

 

LED emergency lighting technology is mainly to solve the emergency function of semiconductor lighting control systems, with functions of day-to-day lighting, power off and audible and visual alarm for lamp failures, escape and relief emergency lighting functions. Through this project, the reliability, energy-saving capacity and technical performances of LED emergency lighting technology can be greatly improved.

 

Portable emergency lighting products are typically used to providing LED Street Lights for users in outdoor harsh conditions/environment. Semiconductor emergency lighting devices and their control systems have good portability, self-generating function, change and discharge capacity. Outdoor portable LED emergency lighting technology is necessary in wilderness and engineering rescue works.

 

“Studies of efficient driving technology and reliable system of emergency lighting applications” drove the market during the process of products industrialization and market promotion. LED emergency lighting market is an emerging market with huge potentials. Although the current situation is LED emergency lighting applications have not been fully accepted by the application market. But according to the special characteristics and adaptability of LED lighting technology, it is believed that in the future LED emergency lighting products will gradually take place of other traditional emergency lighting technologies in places of mines, shopping malls and corridors of buildings.

 

Semiconductors have very good energy-saving performances. Same brightness, LED lights consume only 10% energy of incandescent lamps, and 50% energy of energy-saving lamps. On the other hand, their service life can extend by several times. With the rapid development of LED technology and new LED applications, LED has obvious advantages in energy-saving effects. Energy-saving can extend the working time by 70%, high reliability enable them to be used in extreme environmental conditions. It is expected that within 5 years, LED emergency lighting products can widely take place to general emergency lighting applications.

Difficulties and innovations of integration technology of LED emergency lighting applications

LED technology just took the first step in the LED emergency lighting area. Advanced driver designs, emergency feature selections and sophisticated lamp body structure designs are all waiting for further development and innovation. Especially in the LED emergency lighting standards and reliability, our current technologies are still far behind international advanced technologies. Difficulties are:

 

LED packaging technology: a reasonable LED package structure is a technological key point to improve the light extraction efficiency and the photoelectric conversion efficiency of LED Tube Light  sources. Making reasonable LED structure designs to achieve a minimum light attenuation and meet cooling and design requirements of LED emergency lighting applications is a difficult point.

Difficulties and innovations of integration technology of LED emergency lighting applications

LED cooling technology: the cooling problem of LED package has become the main obstacle that restricts the development of high-powered LED lighting products. In order to effectively solve cooling problem of high-powered LED applications, engineers need to use materials with high thermal conductivity and low deterioration.

 

Secondary lighting distribution technology: the most important parameter of LED emergency lighting applications is to meet the requirement of both general indoor lighting and emergent lighting. Average luminance, luminance uniformity and working time are three major parameters. Through the secondary lighting design, combined with the LED Flood Light -emitting characteristics, engineers need to design package structures that meet the requirements of light distribution structure and emergency lighting basic functions.

 

LED intelligent control technology: Committing researches and studies of intelligent control systems and drivers in accordance with characteristics of LED light source is another difficult point of LED emergency lighting applications. Design the optimal control mode for emergency lighting applications; take study of control modes combined with all sorts of sensors to achieve multiple intelligent controls.

 

Innovations:

Light source design: using metal substrates or ceramic substrates with high thermal conductivities; using watt-level power-type LED chips or small integrated chips; making emergency lighting white-ray sources via sapphire chips + phosphors and the RGB mixing technology.

 

Optical design: LED can send out strong directional light, the optical design of LED is relatively difficult than traditional light sources. According to the light distribution characteristic, by optimization of lens and reflectors, designers can change the transmission path and direction of LED light, improving the luminous efficiency of LED emergency lighting products.

 

Cooling technology of LED lamps: cooling problems can be easily solved by using new materials and construction designs. Applying heat pipe with eutectic technology, directly connecting conductivity materials with LED chips can effectively conduct heat, and consequently extend the service life.