月份：2012年3月

The third-party testing for high power uv led suppliers

 

The third-party testing for high power uv led suppliers

 

In order to eliminate the injustice of the test, many companies are entrusted to a third party to test the LED assembly and circuit structure. LED devices may be tested in the harsh environment, or use a few weeks. During the test, at the same time the pressure, temperature cycling, fixed voltage / change current fixed / change test, test to determine whether the high power uv led suppliers to meet the application requirements in other harsh environmental conditions.

 

Accelerated life cycle testing is a key test to avoid failure in special applications. The test helps to ensure that screen out those expectations at least for 100,000 hours, but only work 1000 hours in advance of LED failure. This situation may arise because of the low-quality LED will reduce the brightness after 1000 hours of work. In fact, if a lower-quality high power uv led suppliers have a higher drive current, at an early stage is high quality LED light, however, the excessive current causes the LED heat too fast, the end result is the brightness dimmed or burned.

 

In addition, the assembly technology to some extent on the LED performance than the chip itself is also a big example. The design engineer should ask for the reliability of the specifications of LED to LED suppliers, and the LED assembly and testing to ensure that the relatively high brightness is indeed better. Some excellent led high bay suppliers to ensure the reliability of the LED assembly technology for three years or longer, and can further provide the ultimate LED products, including the appropriate design with high quality LED and for special applications.

The products supporting capacity of household led lights

 

The products supporting capacity of household led lights

 

In addition to discrete LEDs, LED assembly and power supply for its performance, brightness and color index have a very significant impact. Due to ambient temperature, operating current, the circuit structure, voltage spikes and environmental factors and so can affect the LED performance indicators, the appropriate circuit design and assembly is critical to protect the LED and to ensure performance. Household led lights manufacturers use a variety of techniques and different materials to design the circuit structure and assembly, in most cases, the LED assembly on the experience level of the difference will cause the LED in the same application there are differences in overall performance and reliability.

 

With the rapid growth of the household led lights needs, serve the global market manufacturers and assembly plants also increasing rapidly. It is regrettable that the surge in the support of manufacturers is not only a large number of low-quality LED packaging and LED design engineers to experience a relative shortage of Therefore, in addition to the existing experience and accurate screening LED suppliers, OEMs must also examine their circuit design and assembly technology to ensure that it meets the design specifications, and design to provide sufficient cooling capacity, because the cause of led high bay lights failure and performance the inconsistency of the main factors is overheating.

 

Excellent household led lights manufacturers can not only create high-quality chips, but also has the ability, depending on the LED color, brightness, voltage drop and perspective of its classification packaging. The high quality LED suppliers to provide customers products with consistent operating characteristics, while lower-quality LED suppliers only provide LED similar to the “mixed”.

Lighting comparison between Fiber-optic lights and mains led lights

 

Lighting comparison between Fiber-optic lights and mains led lights

 

Excellent fiber-optic lighting, highly personalized color to meet the different needs of the people’s light environment. The great beauty of decorative effect, the twelve constellations. Fiber curtain swaying posture of Health, fresh and elegant, as if the people back to the mood of the curtain westerly. Star Gazing out the window, points of light flashes, your fingertips, it is very happy; a show of hands Reaching for the Stars, but it is the fiber pull network screen. Fiber optic lighting and people as well as the surrounding environment symbiosis, even up to the light one, the situation one of the realm. With the development and maturation of the various colors of mains led lights color-changing effects for recreational use of monochrome LED manufacturing technology is also increasingly mature.

 

Order to change the color, red, green and blue mains led lights (RGB) as a monochromatic light source, re-use technology to produce the final desired color is called “enriched”. Light performance practices of any other lighting and fiber optic lighting compared to prepared. Therefore, the development trend, fiber optic lighting is still accounting for a dominant position. , Fiber optic lighting and led high bay lighting market there are essential differences due to fiber-optic lighting and LED lighting, and performance results is different, and therefore also have their own emphasis in the sales market. Fiber optic lighting in the lighting industry to share some proportion of market share is not too much, but it is proportional to the acceleration of growth. The visitors continued to cause concern, especially in the usual light inconvenient places especially in the annual American Lighting Trade Fair.

Optimized design to improve the mains led lights’ life

 

Optimized design to improve the mains led lights’ life

 

The life of LED products including factors such as quality and reliability of the product, which product reliability is a key element affecting the life of the product. Reliability refers to the ability to complete the required functionality within the product specified conditions and the prescribed time. Result in poor product quality and reliability of the main reasons for the low level of design, lack of experience in hardware applications, the lack of electronic reliability of systems engineering methods and other factors. Practice has proved that the use of appropriate reliability engineering techniques to test the product.

 

At present, many companies in the face of intense domestic competition, but also expanding foreign markets to increase exports to European countries and the United States. The European Union and the United States introduced a number of directives and standards for mains led lights. For example, the U.S. Department of Energy and the EPA jointly issued the “Energy Star” Act, the overall LED bulb life to 25,000 hours of use but also to maintain at least 70% of the initial luminous flux. North American Lighting Association issued the LM-80-08 led high bay product standards to regulate the testing methods, how to test the product rated lumen maintenance of life “to be clearly defined. In Europe, specifically for the assessment standards for LED products are being developed, specific criteria are as follows: lighting performance requirements of standard IEC 62722-1 and IEC 62722-2-1 standard mains led lights module performance requirements of the IEC 62717, since the town stream LED bulbs performance requirements of standard IEC 62612, the LED drive performance requirements of the standard is IEC / EN 62384.

The temperature dependence of the LED lighting chips

 

The temperature dependence of the LED lighting chips

 

Like all semiconductors, the LED lighting chips maximum allowable junction temperature must not exceed, so as not to cause premature aging or complete failure. If the junction temperature is kept below the critical value, then the outside temperature rises, the maximum allowable forward current must be decreased. However, if the use of radiators, can increase the forward current in the specific temperature of the outside world. LED light output with the chip junction temperature rise and decline. The above situation occurs mainly in the red and yellow LED, white LED with a smaller temperature dependence. Light efficiency and the forward current to keep pace with growth, however, the LED lighting chips installed in the junction layer and the environment with high thermal resistivity can be reduced and even reversed this effect, it is because with the rise of the junction temperature, the emission will be reduced .

 

In addition, when the junction temperature rises and the LED forward voltage and temperature to keep pace with growth, the dominant wavelength of the emitted light to +0.1 nm / K typical rate of growth. A variety of white LED driver circuit features competitions in 1996, Nichia, Nakamura’s found a blue LED, white led chips used in led high bay arensidered the most development potential components of the illumination source, therefore, the white LED performance improvement and commercialization of application, it instantly became the focus of national research. The white LED used in the field of trail lights, automotive lighting, traffic signals, portable electronic products, LCD monitors and other public places. White LED lighting chips with rich primary colors color temperature and high luminous efficiency characteristics.

The advantages of aging test for led studio lighting

 

The advantages of aging test for led studio lighting

 

Automotive lighting, LED light source inside and outside of the building, as well as laptop computers or TV LCD screen backlight. The development of high-power led studio lighting technology to improve the design stage of the heat dissipation requirements. Like all other semiconductor, LED is not overheating, so as not to accelerate the weakening of output, or result in the worst situation: a total failure. Compared with incandescent lamps, high power LED with higher efficiency, but a considerable part of the input power is still turned into heat instead of light. Thus, the reliable operation of the need for good heat dissipation, and requirements in the design phase to consider the high temperature environment. Design led studio lighting driver circuit size, but also must take into account the temperature factor: must select the forward current to ensure that even if the ambient temperature reaches a maximum value, the LED chip will not overheat. With increasing temperature, by reducing the maximum allowable current, that is derated to achieve cooling.

 

The temperature dependence of the power supply to run led studio lighting disadvantages: the high temperature region, the LED is out of specification to run. In addition, when in the low temperature region, the lighting source powered by the significantly lower than the current maximum allowable current (see Figure 1 red curve). The green curve shown in Figure 1 (referred to as PTC thermistor) to control the led high bay lighting current through the LED driver circuit in the positive temperature coefficient thermistor is a major improvement.

Foxconn: to get rid of the LED “OEM” label

 

Foxconn: to get rid of the LED “OEM" label

 

In the aura of the Empire “on the world’s largest foundry, entered a 38 year Foxconn Technology Group (hereinafter referred to as: Foxconn) still look to the sun at high noon.

 

Built in the Pearl River Delta, Shenzhen, Foshan, Zhongshan, Dongguan Science and Technology Park, Shenzhen Longhua Science & Technology Park’s three companies year after year to enter the top ten corporate revenue in Shenzhen City, and tax top ten, and each year the Shenzhen tax contribution of over ten billion yuan . Park is transforming into a product R & D center, sales presentations and staff training center, mold manufacturing and technology research and development centers, new materials and new energy research and development centers, new equipment and automated manufacturing research and development center, a small amount of manufacturing base, and strive to become the construction of Shenzhen “National innovation-oriented city, “the main force pushing the hand.

 

Although Foxconn chairman Terry Gou is not satisfied with the title LED “OEM” factory, but in the field of consumer electronics, in order to create its own brand of Foxconn, almost impossible.

 

Now, Terry Gou eyes locked in the led high bay lighting industry is in a stage of rapid development.

 

Foxconn products, only LED products printed on ‘FOXCONN (Foxconn)’ brand label. “Recently, Foxconn LED lighting division who LED inside that, although the Group also international lighting giant Philips, GE and other OEM products, but the LED display, LED lighting products are now the only intra-group with their own brand products.

 

Foxconn expects the help of this emerging field of the LED “OEM” to achieve the transformation and upgrading, and thus out of its own brand breaking initiative. “The source said.

 

However, despite having others unmatched manufacturing cost advantages, but Foxconn’s Own Brand of LED is not all the way flat.

Japan always aggressively defend LED lighting patents?

 

Japan always aggressively defend LED lighting patents?

 

In fact, the core patent barriers like a hanging in the Chinese LED lighting patents head a sword of Damocles. Control core patents are overseas manufacturers, Chinese enterprises always face the risk of patent infringement.

Suzhou Institute of Nano Technology Center Dr. Liang Bingwen more domestic listed companies in the Mainland, on behalf of the more vulnerable object of international giants, and the Mainland has a huge potential demand, a few will soon become the major LED manufacturers to compete for the main battlefield, the patent war imminent.

 

Foshan lighting of LED lighting patents consultants Dong Ping had said so “in the initial stage of the company, has patented the manufacturers deliberately pretend, take ‘Fangshuiyangyu’ strategy fattened back stab the knife, the new corporate divisions court, he pointed out that the Chinese LED industry without patents, it means no defense tool in the position of being beaten and helpless in a patent dispute.

 

The patent war, many growing businesses tremble in fear, fear that the involvement of the abyss and brought to its knees. Business is war, the battle to win a patent can help a firm foothold in emerging markets, losing a patent battle is likely to be swept out. War is so cruel, there is no right or wrong, all the legal level, see the real trick.

 

It is true that this war may well be a good thing. With the intensified market competition and patent disputes, will become the norm, I am afraid a heavy blow to led high bay manufacturers are not yet mature. This war broke out, it will continue to cause companies to survive, and positive integration and maintenance, and promote the healthy development of future within the company.

RGB led downlight enterprises how to survive in fierce compete.

 

RGB led downlight enterprises how to survive in fierce compete.

 

Global environment to usher in the era of LED lighting, LED market in China into the winter! Study the fundamental, mainly because of the disorderly competition in recent years, the help of national policy, many companies have investment in the LED industry, this rapid expansion, resulting in LED enterprise overcapacity. RGB led downlight on the market are vastly different, a lot of product quality standards, resulting in the increase of the difficulty of led high bay lighting marketing, public less trusting of LED products.

 

Go on the face of such competition, enterprise reform to survive?

 

“Quality is the fundamental business survival”, in the universe Photoelectric Co., Ltd. is the development of enterprises has been the spirit of this concept in the universe photoelectric domestic RGB led downlight industry leading enterprises, scientific and technological innovation, quality and reliable standard, strict factory every batch of products strict quality control to ensure that each LED light allows users to rest assured.

 

Good use of multi-channel way to the development of enterprises, traditional industries need to get out a fixed model for the development enterprises, ensure that enterprises can get through the most advanced means of sales channels, a wide range of products, sales channels have been most favorable in the universe photoelectric competitive weapon, they not only open up sales channels in the corporate line, and China led the transaction with the exclusive China led trading network to provide exclusive online marketing services by the online investment and a variety of network distribution, buy activities and a weekly basis to provide real and effective procurement information go hand in hand, enterprise-wide to provide a full range of business information services.

“LED intelligent lighting” reveal its importance for the first time

 

"LED intelligent lighting" reveal its importance for the first time

 

Recently, the news that Philips Lighting and glass manufacturers, LED lights do the glass inside the glass to become a luminous body. Another overseas lighting manufacturers, GE is also building manufacturers, LED intelligent lighting products and architectural design integration.

 

“LED for its light source characteristics determine its future intelligent lighting direction,” said Dr. Xu Chen, deputy director of the National Institute of Standardization in Guangdong Province, 3-five years later, when the LED luminous efficiency of limit, the energy-saving effect is no longer led high bay lighting is the ultimate interests of the chief selling point. Future competition in the LED lighting is more reflected in the intelligent demand.

 

It is reported that an international consortium of well-known lighting companies has been extended in the field outside of the lighting, take a wide route. Domestic lighting enterprises start line in the layout of sensing, communications, multimedia and intelligent lighting.

 

As early as in the first half of 2011, Philips Lighting has been working with Bayer to join the eco-business building plan. Through interdisciplinary cooperation, the program provides comprehensive services and material solutions for the construction industry decision-makers in the construction of public and commercial sustainable building. At the same time, OSRAM acquired last year Encelium technology companies. This company has a state-of-the-art commercial building lighting control software system, OSRAM LED intelligent lighting solutions provider targeting to become a pawn.

 

Intelligent lighting is just a concept, but already many companies in this area of ​​research and development and layout. LED inside an industry expert said: “Although the country has a number of enterprises to do intelligent lighting, but more of a stay in a simple dimming color, while the real intelligent control system to proceed. “