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Tag Archives: led street lighting manufacturers
About the use of solar energy resources development and LED lights
Currently the world are actively developing various new energy and energy-saving technologies such as wind, hybrid, ethanol, solar, hydrogen, wave power generation, underground energy, waste gas and so on. Former President Jiang Zemin is also retiring after “Reflections on China’s energy problems,” a paper presented at the national level want to increase nuclear energy, wind energy, solar energy and many other emerging areas of attention and investment.
1 the distribution of solar energy resources
According to the power grid to provide international data show that the total solar radiation from the national distribution point of view, Tibet, Qinghai, Xinjiang, Inner Mongolia, southern Shanxi, northern Shaanxi, Hebei, Shandong, Liaoning, Jilin, western, central and southwestern Yunnan, Guangdong southeast, southeastern Fujian, Hainan Island, east and west and southwest of Taiwan Province and other large areas of a large amount of solar radiation. Especially the largest Tibetan Plateau, where the average altitude of 4000m above the atmosphere thin and clean, good transparency, low latitude, long hours of sunshine. Known as the “Solar City” of Lhasa City, the annual average sunshine time is 3005.7h, 68% relative sunshine, solar radiation is 816kJ/cm2 · a.
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2 Panzhihua City, and analysis of current use of solar energy resources
According to the authority of the National Meteorological Bureau data show that the heat resources in Sichuan Panzhihua is the most abundant land, abundant sunshine, the annual sunshine time is about 2838h, frost-free period more than 300 days, year round average temperature of 20.6 degrees, often even in winter sunshine, is the development and utilization of solar energy one of the best, second only to Lhasa.
2.1 Panzhihua City, the residents of solar water heaters have become a popular choice. Panzhihua many residents are installed on the roof of a piece of the solar water heater installations. Panzhihua city in the unremitting efforts, now the proportion of households installing solar energy has reached 40%, is the use of solar energy the best cities.
However, the use of solar energy, there are many problems. Solar water heater solar energy device is generally installed on the roof, not beautiful; the lower floors, but also the nearby high-rise buildings form a reflective, resulting in light pollution; exposure often leaking water pipes; With the enlargement of cities, drawing high-rise buildings to the sky, but most developers do not allow the installation of solar installations in the attic, many families still use gas water heater or electric water heater.
In fact, if properly planned, led by the planning and construction departments, unified layout installation or approval monitoring installation, the use of solar water heaters, not only to ease the pressure on the city’s gas and electricity supply, and low-carbon environment. If able to do so, by building residential units in some areas to more scientific and reasonable way to install solar energy control center, the solar energy into electrical energy reserves in the batteries, then a special shunt device available to the corridor, aisle, district roads and other public areas and indoor lighting, electricity, etc., will greatly reduce the power consumption of urban life. A few years ago, Panzhihua city government has taken high-rise building with a split in the way to force the use of solar energy, so that every family has old houses, new houses have to carry a solar energy device, but has not been implemented due to various reasons. In addition, the solar cookers would be a good way to low-carbon life, or the use of solar energy into electricity directly into heat, electromagnetic or thermal heating to promote even heat, to achieve the purpose of cooking.
2.2 Panzhihua City, solar lighting gradually came into being. Case 1: According to the Panzhihua Daily News reported in July 2006: Panzhihua City Industrial Park Road No. 2 street lighting project. This section is a city sub-distributors Ⅱ, should be semi-cutoff type light fixtures. As the night into the small park vehicles and pedestrians, the most illumination and brightness to meet the case, all the required street circuit 294. This section of the ordinary lighting and solar lighting, economic analysis and comparison the following conclusions: On the product itself, solar LED lamps cost is higher than ordinary lamps; first investment grade solar street lights than the average high 715,000 yuan, medium and low Solar street lights and street lamps similar to normal. Operating costs, significantly higher than ordinary lamps solar lamps and electricity, labor, etc. is increasing. It is estimated that a total investment of 10 years (including routine maintenance and energy consumption) than the average solar street lights to save 3,566,750 yuan. Case 2: According to the Sichuan Worker’s Daily reported in June 2009: Panzhihua City, Riverside Avenue and Bing Ren-line installation of solar street lights have been put into use. The road has become all-solar street light the focus of public concern. Solar street light without the cost of electricity in the grid, you can normally play a role in lighting. Solar panels on the street, you can store up solar energy into electricity, until the night or rainy day, then release the energy used for lighting.
3 Analysis of Solar LED lighting
Solar LED lighting market 3.1 Analysis. And the booming international photovoltaic power generation compared to 10-15 years in China lags behind developed countries. China’s optoelectronics industry is growing at an annual rate of 30%, the 2008 Olympic Games held in Beijing, the state’s call for building a socialist new countryside, the next five years decreased by 20% of the fixed target energy, these three to the solar industry provides unparalleled opportunities, coupled with the state development and utilization of renewable resources, preferential policies have been implemented in such a good industrial base, the whole society and the state as long as there will be a small investment a large output.
Urban lighting reflects a city’s image, reflects a city’s scientific management, is a social project. Solar LED lamps for its superior energy-saving effect, humanities, illumination control, much favored by the people, their cost and flat frequency alternating current lamps, and has no damage to the environment, not the characteristics of non-renewable energy consumption, as long as sufficient light source where there development and application of solar LED lighting market.
3.2 Solar LED lighting trends. Development of major solar energy development in three directions, namely, solar PV, solar cells and solar water heaters. In terms of energy saving lamps developed very rapidly in recent years, in addition to common energy-saving lamps, LED lamps are also developed. LED light is a cold light source, more energy efficient than energy-saving lamps, LED technology combined with solar energy will become the future trend of public lighting design.
3.3 Solar LED lighting features. 1) Low cost: High brightness, low power, solar cells and batteries required to configure the lower costs. 2) Long life: single crystal silicon or polycrystalline silicon solar module quality assurance of 20 years, 20 years after the battery components can continue to use, but power output decreased slightly. Super bright white LED life of up to 100,000 hours, the intelligent controller static low power consumption, long service life. 3) reliable and stable: monocrystalline silicon or polycrystalline silicon solar module with anti-typhoon, anti-moisture, anti-ultraviolet radiation, and so on. 4) unattended: no operation management, intelligent control system, perfect enough to the user ease. 5) 10 hours power supply: system design, taking into account the local rainy weather, the average excess energy stored in the battery, ensure the user consecutive days of rain has sufficient power to use. 6) Use of solar LED lamps do not set up or buried power lines; without grid power; do not spend a lot of manpower, material maintenance.
In the current situation of energy shortage, solar energy resources are very worthy of research and development, and has broad market prospects, a new type of energy with the most energy-efficient lighting, no doubt is a perfect combination. Of course, we strive to develop and use new energy sources at the same time, it should promote energy conservation, after all, the most clean and cheap energy is not the most energy.
Jiangxi green lighting industry committee was set up yesterday
It is understood, Jiangxi Province in the implementation of “scientific development, carry catch-up, green rise” of the new strategic goals in the process, followed by domestic and international lighting industry in frontier science and technology, completely abandoned in some places simply to undertake the transfer of industrial development model, unconventional directly to the green lighting industry transformation and upgrading, to maximize the scientific and technological content, the largest increase in high value-added, industry cluster to achieve the fastest speed, with a view to the shortest possible time to seize the high ground of modern lighting industry. So far, Jiangxi lighting industry in the country has played a very important position, not in time, 300 billion yuan in the domestic production capacity will be very close to the world, has been among the forefront of national development, doing well.
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According to the authorities introduced the participants in the industry in the country and inconspicuous green lighting Wuning County in Jiangxi Province High-tech Industrial Demonstration Park, has gathered more than 100 energy-efficient lighting companies, industry supporting more than 90%, annual capillary 10 billion, the capillary more than 130 varieties and specifications, the entire annual output of light 500 million, by 2010 the main business income of nearly 40 billion yuan, profits of 500 million placement 10,500 people, which indicates the healthy development of Jiangxi lighting industry momentum .
Came rushed to join the “green light industry committee,” the inaugural meeting of the Jiangxi Provincial Secretary Wuzhi Yun pointed out that the SMEs, Jiangxi Province in the lighting industry in the future “industrial warning analysis, industrial transformation and upgrading, training, industrial organization and industrial Baotuan development” on foot to the next effort, to “mentor team building, and financial marriage, the establishment of security system, strengthening R & D efforts, expand exchanges and cooperation for development” to do great article on to vigorously cultivate leading enterprises, vigorously implement the brand strategy, and truly the lighting industry in Jiangxi in the country and internationally bigger, stronger.
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In the “green lighting industry committee” set up, to be entrepreneurs also held the first session of the Council members first Congress passed the “green industry, SME associations Jiangxi Regulations Committee”, elected a Committee leadership and membership of the Board and so on.
I was also informed that, in particular, the establishment of “green lighting industry committee” is a branch of the Association of SMEs in Jiangxi Province, the agency will be based on “self-construction, self-management, shared services” principle activities, fully embodies the Jiangxi lighting industry entrepreneurs “harmonious unity and common cause” of the spirit of scientific development.
Who is more energy efficient? CCFL, LED TV’s energy efficiency level of analysis
To better understand the energy efficiency of flat-panel TVs implementation of new regulations and effectiveness of the author and colleagues Gome, Suning had visited a few supermarkets and investigations, through investigation and analysis, hope to arrive at the current flat-panel TV market is relatively real and effective ideas and data for the majority of users to provide reference and help.
Energy consumption in the basic flat-panel TV sales have been standard
After a visit and asked Beijing, the supermarkets are selling flat-panel TV energy consumption of basic standards, and most of the products of one and two energy efficiency, but because most of the products are sold prior to listing and purchasing, and there is no Paste the energy-efficiency labeling. There sales staff said that although some products do not paste the energy-efficiency labeling, but by power rating and size can also calculate the energy efficiency rating, the current store would not have high energy consumption products.
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It is understood that after 3 months of inventory liquidation, the brand’s high-energy flat-panel TVs are basically sold. China National Institute of Standardization also said that the standard formulation are pre-owned enterprises to participate, and should be said that companies have made preparations in advance, then there is the introduction of standards, so business is not too great.
TV companies that have little effect. Tongfang public relations staff also said that products sold on the market today are basically the LED series, did not meet the product have been few and relatively inventory less than the other TV. Quasi-news public relations director Yu Haitao Hisense said, because the standard has been discussed for several years, so the brands already in the energy-saving technologies to be prepared this year to upgrade the industrial LED-backlit TVs is to meet this national standard method.
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According to the backlight light source, LCD TV CCFL and LED can be divided into two, which uses LED backlight LCD TV power consumption lower. Professional and technical personnel had done such a projection, a whole power of 200 watts of ordinary flat TV, power consumption is 0.2 degrees per hour, a use of the LED backlight technology, television product, the whole power consumption save 50% than the average TV, saving each 0.1 degree per hour television.
After the store asked that, in the sale of LCD TV products, CCFL backlight TV energy efficiency standards are mostly 2 and 3 energy efficiency rating, while the LED backlight TV is basically one and two energy-efficient, LED backlight LCD TV compared to the traditional CCFL LCD TV energy consumption has a huge advantage.
Stores were randomly selected by CCFL and LED LCD TV a 20 investigation and calculation results show that the two energy-efficient CCFL LCD TV products at 55%, an energy-efficient products 45%; LED LCD TV a 70% energy efficiency products, two energy-efficient products is 30%.
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China Electronic Chamber of Commerce Consumer Electronic Product Investigation Office report released in 2010, sales of LED TV in the urban market has reached more than 30% of total sales, the industry generally believe that 2011 New Year’s Day, LED will be fully than LCD, expected annual volume will exceed 24 million units, LCD LCD TV retail volume will be 20 million units.
Globally, according to Wits View survey, the penetration rate of LED TV in 2010 about 18%, equivalent to 34 million units, while the cost of improvements, the estimated 2011 or LED TV LED-backlit panel prices are than 2010 a significant reduction, will greatly stimulate user demand, estimated in 2011 the penetration rate of LED watch TV 43%, the number reached 94 million units.
The future of sensors – the creation of forecasts
“Professional face to the deep, broad knowledge to” relative to the personal growth of a vital criteria, the enterprises do. Successful large enterprises include a pyramid: the tower in the eyes of others, have extensive business with deep, deep penetration of vertical industries enable enterprises to climb the spire, the core competitiveness can not be copied. And cover a broad range of industries, as the general foundation, firmly Qingqi the size and overall strength. Of Freescale, automotive electronics is undoubtedly the spire on the sparkling jewel in the sensor, MCU and other semiconductor technologies, it is in the bottom of the tower, strengthening the foundation. Freescale tower in the hearts of the base is a good team, good corporate culture, the core of technological innovation, market leadership.
Which industries can rarely such as sensors, moisten things silently as in-depth all industries, military, aviation, environmental, medical, industrial, consumer … … It is no exaggeration to say that particles from the vast universe to the world, from the planet to the transient operation response, it will enlarge our limited senses and then zoom in to help us understand, perceive the world.
For Freescale, the 2009 is a memorable year. After experiencing a series of changes, if this year is a watershed in their business, then the sensor field success, can be a milestone. In June, Freescale announced the sensor shipments exceeded one billion. If you log on Freescale’s website, you will find the sensor on the page showing the impressively “1billion” the words, it is like a mark, a record of this glorious history; something like a medal, inspired this struggle Freescale people.
Comes at the end, vice president of Freescale Microcontroller Solutions Division, Sensors and Actuator Solutions Division, Mr. general manager DemetreE.Kondylis dialogue with the Other, and thus also the more heavy. Sensors is changing the world around us and interact. On the sensor, how many kinds of needs, there are many kinds of ideas. How many kinds of ideas, there are many possibilities.
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MEMS technology – use smaller sensors, greater changes
Freescale’s sensors market in the industrial, automotive safety, health and emerging consumer electronics applications, the main products including those based on MEMS (microelectromechanical systems) accelerometers and pressure sensors, and CMOS-based touch sensor.
Freescale’s MEMS sensor applications is quite extensive, for tilt detection, movement, positioning, vibration and impact generated under the power of change, or can be used to measure pressure, height, weight, and water levels. Core technologies include: ASIC and the inverter design, packaging, software, simulation and testing and so on.
In the automotive sector, the body must be applied in many parts of Freescale’s MEMS sensor, to enhance vehicle safety applications, MEMS accelerometer to provide collision detection and front / side airbags and other automotive safety devices for effective deployment; in the medical field and special health monitoring applications, the use of MEMS sensors will enable users to have more accurate blood pressure monitoring equipment, more powerful apparatus; in handheld devices, MEMS products to make natural hand movements (rather than keys) to activate various functions or equipment to make the game more responsive, more powerful, while it can detect the devices are dropped acceleration or deceleration, in order to prevent damage to handheld devices, or to minimize the risk of data loss; In addition, It can also be used for more accurate weather measurement applications.
In addition to these areas, Freescale’s MEMS sensor in industrial applications are also facing new opportunities. Through a variety of wireless integrated sensor applications, the market will continue to expand.
Freescale will be very small electronic and mechanical components included in a package made of the MEMS sensor. For those who need to be structured to meet the small package quick response, high sensitivity, low current consumption, low voltage operation and standby mode users, Freescale’s MEMS sensor is the ideal choice.
However, Kondylis President also clearly aware of the opportunities and challenges the status quo, he said faces a wide range of MEMS sensors design challenges, such as improved sensitivity, temperature coefficient of offset (TCO), power consumption, robustness and compatibility as well as media device reliability, etc. In addition, the market will continue to require cost-effective solutions. In the future, Freescale will continue to analyze the variety of available technologies to use them for MEMS sensors, to meet changing market needs. Freescale is hoping to use their embedded systems, control technology, to build components for the sensor is more intelligent system that will include more sensor nodes and more logic, memory, connectivity, and to achieve self-induction in the sensor node software.
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As “sensor fusion” new era to create new value
Freescale’s sensors, ZigBee technology, micro-controllers, microprocessors, digital signal processors and analog IC fields with a wide range of IP technology, they can be added to the product, creating a wide range of features and a more intelligent sensors products.
Fully integrated with Freescale’s tire pressure monitoring system (TPMS) system-level package, for example, it includes four chips, by the pressure sensor, accelerometer elements, an 8-bit MCU and the RF transmitter composition. Mr. Kondylis said, it is this system in package, creating a “sensor fusion” of the new era, and this will be the future market trends.
Freescale has been to strengthen its existing portfolio techniques. New applications are emerging, which requires them to continue the use of case detection sensor, in order to build appropriate software algorithm, hardware and software platform benefits exist.
Freescale provides the ability to intelligent software has been confirmed that the software can hide the complexity of the system. For example, a smart sensor nodes can solve the response time, data processing load and congestion problems. The so-called smart sensor nodes, it is one or more sensors, conditioning, analog-digital conversion and ultra-low power 32-bit MCU package clustered together, they and memory in the same package.
In addition to such a system in package, the new era of integration, strong technical support has made more creative new applications appear endless. In addition to present several major sensor product line, the angular velocity sensor and Freescale also through the use of specialized 77GHz silicon germanium bipolar CMOS (SiGeBiCMOS) technology, developed for automotive active safety market SiGe integrated radar chip. Angular velocity sensor technology was integrated into a low-gravity and angular velocity of the sensor platform in order to calibrate the embedded controller firmware and memory to achieve the deployment; SiGe 77GHz frequency is able to provide higher power and higher voltage, at the same time, it also achieve a low noise on the transmitter. BiCMOSSiGe technology is a big advantage is that it supports a high level of integration. In addition to automotive electronics, the consumer products are also using angular rate technology to achieve lower cost and higher performance goals.
Brand positioning and “green” theme is consistent
In the world of science and technology development process, “green” is undoubtedly an important issue. Low power consumption and energy savings in the market demand, Freescale played with the “green” theme consistent brand positioning. To emphasize the high-performance, energy-efficient semiconductor technology, they introduced the energy efficiency solution (Energy-EfficientSolutions) – selection of the effective implementation of energy-efficient products and technologies.
With the smart grid development and expansion of requirements, including tamper protection and other security measures will emerge smart metering applications. Freescale accelerometer is suitable for detecting vibration and change of direction, to provide protection. Green advocates use less electrical energy and water, and pressure sensors based on direct measurement of water level, to ensure water conservation and energy required for water heating. In addition, since many applications are battery powered, in order to reduce the frequency of battery charge life, energy conservation has become a key factor. … We feel deeply, not just the trend of green, sustainable human society is to honor development of long-term commitment.
For Freescale, the “green” is not just brand marketing strategy, they actually are found in many products including sensors, including the definition. They will continue to focus on cost-effective, flexible, and allow the listing of the fastest technology products and make them green trend fit. With these concepts throughout the product development process, Freescale confident that they will firmly seize new opportunities.
Born and bred
Many successful professional managers resume, probably reveal this message: they join a particular company, since the conclusion of the next bond. They often start from the most basic work, they skillful, familiar business, the company’s culture and characteristics of clear in mind. They can be led by the army of the Marshal, it can be hard craftsmen. This manager, in the realization of self-value-added process, but also for enterprises immeasurable wealth.
Obviously, Kondylis President is such a person.
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Mr. Kondylis’s predecessor in 1984 Motorola’s semiconductor division, served as program engineer, engineering manager process, device engineering manager, operations manager, business director. Freescale established, he became analog and mixed-signal product manager, in 2006, as the sensor and Actuator Solutions Division general manager. Under his leadership, the department as solid-state sensors, MEMS and a leading supplier of parts, and in April this year, according to iSuppli’s research shows that Freescale is the world’s automotive MEMS sensor area’s number one independent supplier.
About these honors, Kondylis President not without pride, but he also sincerely that the sensor is Freescale representative of the many product lines, which are built on top of the last of the technical system. He believes that thanks to a remarkable performance first team of employees, these employees make Freescale always go hand in hand with the latest technology, especially in the technology into new product innovation. Secondly, also thanks to Freescale’s a good working relationship with our customers, which can help them determine the direction of the most attractive new products.
Mr. Kondylis adhering to a set of innovative management strategies, which he called “hybrid development model.” Using this model, Freescale and external R & D companies and partners within the collaboration, the most appropriate new technology and IP into Freescale’s new product development series.
This eclectic mode, perhaps with Mr. Kondylis years of professional experience are inseparable. He was born in Motorola, longer than the Motorola and Freescale. For 25 years, Motorola and Freescale has laid on him a deep imprint, which is not only time, but also ideological. Mr. Kondylis said with emotion: “Motorola is a technology innovator and leader, but Freescale is the market leader and market-core businesses which are competitive in the market, different cultures have played a role, but also reflect these years, we have the changing market environment. ”
In both cultures intertwined, some old product lines to continue to grow, the sensor is one of them. And even if we exhaust all the guess to determine its direction, the future is still a variety of attitude sensors to jump in front of us. It is flexible, sentimental, volatile … … exposure to people outside the industry, searching through all the clues may be an attempt to get a little inspiration, and for the industry among the people, they are tirelessly to start from scratch, creating the future, change the world. Freescale’s sensors want smarter, more cost effective to put more sensors to the embedded system, which – they vowed direction.
Causes of death of LED lights
We often encounter the case of LED does not light, packaging companies, application companies and the use of units and individuals are likely to encounter, which is within the industry say the death of light phenomena. The reason is nothing but two cases:
First, LED’s leakage current is caused by failure of the PN junction, the point is not bright LED lights, this generally does not affect the other LED lights work;
Second, LED lights off the internal connection leads, resulting in no current through the LED lights produce death, this situation will affect the other LED lights work, due to the low voltage LED lights (red, yellow, orange LED voltage 1.8V-2.2V, blue, green and white LED operating voltage 2.8-3.2V), to spend the series and parallel to the connection, to adapt to different voltages, the series of LED lights, the more the greater impact, as long as there is an LED which Light internal connection open, it will cause the entire string of series circuit LED does not light, see the situation more serious than the first multi-case.
LED lights are dead affect product quality, reliability of the key, how to reduce and eliminate the dead lights, improve product quality and reliability, is packaged, enterprise applications need to address the key issues. The following is a cause of death light of some of the reasons for some of the analysis,
1, electrostatic damage to the LED chip, the LED chips of the PN junction failure, leakage current increases, resistance becomes a
Static electricity is a crime against a great devil, the world of electronic components because of static electricity damage to the numerous, resulting in tens of millions of dollars in economic losses. Therefore, to prevent electrostatic damage to electronic components, electronic industry, a very important job, LED packaging, and application companies do not take it lightly. Any part of problem, will result in damage to the LED, the LED performance deterioration and even failure. We know that the body (ESD) up to three kV electrostatic around enough to puncture damage the LED chip, LED packaging production lines, various types of equipment to meet the requirements of the grounding resistance, which is very important, generally require grounding resistance of 4 Ohm, some demanding situations and even to achieve its grounding resistance ≤ 2 ohms.
These requirements are for people who are familiar with the electronics industry, the key is in the actual implementation is in place, whether there is record. According to my understanding private enterprise in general, anti-static measures are not in place, which is why most companies finding out earth resistance test record, even if the earth resistance test is done once a year, or a few years time, or have a problem check when the grounding resistance, earth resistance test does not know that this is a very important job, at least four times a year (quarterly test time), some require a high place, we must make a monthly ground resistance testing.
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Soil resistivity changes with the seasons and different, spring and summer days rain, the soil is easier to wet ground resistance, less soil moisture in autumn and winter drying, grounding resistance is likely to exceed the prescribed value, for the record in order to preserve the original data, so future well documented. Meet the ISO2000 quality management system. Test ground resistance can design their own forms, ground resistance testing and packaging companies, LED application companies have to do, as long as the device name will fill in various forms, the measured grounding resistance of the device record, test signatures can be archived.
Electrostatic damage to the body of the LED is great, the work should wear anti-static clothing, equipped with electrostatic rings and static ring should be well grounded, there is a need not grounded anti-static wrist strap to yield good results, it is recommended not to use the strap The products, if the staff violations of rules, should receive appropriate education, warning, notice also play a role in others. How much static electricity with the human body, with people wearing clothes of different fabrics, and the people’s physique, autumn and winter, night clothes, we can easily see the clothes off between the discharge phenomenon, electrostatic discharge voltage had three kilovolts.
The silicon carbide substrate chip ESD value of only 1100 volts, sapphire chip ESD values even lower, only 500-600 volts.
A good chip or LED, if we hand-pick (the body without any protective measures), the results can imagine, chip or LED will be damaged to varying degrees, sometimes a good device through our hands the inexplicable bad, this is the fault of static electricity.
Packaging companies in strict accordance with ground rules if you do not act at the expense of the enterprise itself, will result in decreased rate of qualified products, to reduce the economic efficiency of enterprises, the same application of the LED business equipment and personnel if the grounding bad, then the LED will cause damage to rework the inevitable. Manual in accordance with the requirements of the standard LED, LED’s leads should be less than 3-5 mm from the gel, to bend the foot or welding, but most applications do not do this business, but only separated by a piece of PCB thickness (≤ 2 mm) directly welded, and this will cause damage or damage to the LED, since the high welding temperature will affect the chip, the chip features will deteriorate, reducing the luminous efficiency, or even damage to the LED, this phenomenon is not uncommon. Some small businesses to use hand-welding, soldering iron through the use of 40 wap, can not control the welding temperature, soldering iron temperature of 300-400 ℃ above, the high welding temperatures can also cause death lamps, LED lead in the high temperature expansion coefficient than about 150 ℃ several times higher coefficient of expansion, the internal gold solder joints because of excessive expansion and contraction will pull the solder joint, resulting in the phenomenon of dead lights.
2, LED lights inside cause open solder joints to connect the phenomenon of death Cause Analysis lights
2.1 package does not build the whole production process, incoming inspection, backward, causing LED is the direct cause of death light
Commonly used stents row encapsulated LED, stand rows of copper or iron is used by the precision metal stamping dies, because copper is more expensive, the cost is naturally high, by the fierce market competition factors, in order to reduce manufacturing costs, most market are used to bring cold-rolled low carbon steel stamping LED stand irresolute, iron bracket to go through a row of silver, silver has two roles, first in order to prevent oxidation of rust, and second, to facilitate welding, frame row plating quality is very critical It relates to the LED’s life, before plating treatment should be carried out strictly in accordance with procedures, rust, oil, phosphate and other processes should be meticulous, to control the plating current to control the thickness of silver, the coating is too thick high cost, impact on quality too thin.
Because most of the test LED packaging companies do not have the ability to stand row plating quality, which gives a number of electroplating enterprises can take advantage of, so stand rows of silver plating layer thinning, to reduce costs, general packaging companies ranked the stent IQC lack the means test, no test stand rows of coating thickness and the fastness of the apparatus, so the more easy to muddle through. I have seen some stand in a warehouse a few months after discharge rusty, not to mention the use of, and shows how poor the quality of plating. Exclusive use of such stents is definitely out of the product do not use long, not to mention the 30,000 to 50,000 hours, 10,000 hours is a problem.
The reason is simply a period of time every year, southerly days, this weather air humidity can easily lead to poor plating metal rust, the LED component failure. Even encapsulates the LED will be too thin silver layer adhesion is not due to strong joints and bracket from, resulting in the phenomenon of dead lights. This is what we encountered was the use of bright light is not good, in fact, stand out with the internal solder joints.
Taffeta reduce the amount of drop in price
Recent days, China textile city in the sub-cloth “Taffeta” is less than pre-transaction, the volume of declining equipment prices to fall based.
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With the arrival of high temperatures these days, after-market off-season began, the first sub-cloth fabric production hang on is not rising, falling, “taffeta”, “light spinning,” “Satin”, “eight satin” “Satin” and other varieties of most rare spot, almost no cargo available for some manufacturers, fabric prices down by species diverged.
By high temperature, Textile City recently come to market directly to clients around the sample and the goods have to be cut, lining cloth, one of the main varieties of dyeing finished 63D170T “taffeta” have a small amount of stock, occasionally sending a small group transactions, prices were stable, owed up asking to send a batch-type lift up, custom orders are not due to lack of fabric and more transactions; 61D170T stain finished “taffeta” dispersed have the appropriate spot, days of closing time to time, the price is still maintained at 1.90 yuan / m, rather than the 63D stock price varieties. 63D190T dyeing finished “taffeta” dispersed have a small amount of cash, 61D190T dyeing finished “taffeta” generally appropriate spot, stain finished overall 190T “taffeta” spot volume than 170T species, occasional small group of cash transactions, prices to fall mainly on a few days less than the decrease of about 0.10 yuan / m, and more down about 0.20 yuan / m; custom orders are not due to lack of fabric and more transactions. 63D210T dyeing finished “taffeta” dispersed have a small amount of cash, 61D210T dyeing finished “taffeta” generally appropriate spot, stain finished overall 210T “taffeta” amount of cash rather basic and 190T species, occasional small group of cash transactions , the price to fall mainly on a few days less than the decrease of about 0.15 yuan / m, and more down about 0.25 yuan / m; custom orders are not due to lack of fabric and more transactions.
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Into the off-season as the recent Textile City, lining fabric in the “taffeta” Winter with the retraction of each species, wet storage sales have increased.
2010 Guangxi “silkworm cocoon industry, technological innovation,” start of the project will be held
November 4, 2010, Guangxi Science and Technology Plan “silkworm cocoon industry, technological innovation,” start of the project will be held in Nanning. Science and Technology Department at Dongying Cong rural regional Director, Guangxi Sericulture Technology Extension Station Qiguang Jun owners and land REHAU vice station, and take 10 units of the subject Project Leader 20 people attended the meeting.
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The meeting was presided over land REHAU vice station. Project Leader Qiguang Jun webmaster at this year’s first report on the development of our region’s situation and the silkworm industry next year’s work plan, followed by the “silkworm cocoon industry, technological innovation,” the work of project implementation arrangements, a clear commitment to the project tasks and units division of labor, stress should be based on silkworm silk industry, the demand for technological innovation, to silkworm cocoon industry relies on technology innovation and strategic alliances to conduct joint research, focused on their respective strengths to jointly research silkworm industry, key technical issues, so for more results. Person in charge of various issues have also to speak, that go all out to ensure that the project schedule knot title.
Science and Technology Department at Dongying Cong rural regional Director of Guangxi Sericulture Development affirmed the achievements, stressed the need to strengthen the management of research funds, to be used for other purposes, improve efficiency, and to strengthen cooperation in science and technology awareness and research, hoping more results , a standard out patents.
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Finally, the project host Qiguang Jun owners were signed with various issues to bear units topics mission statement.