作者：Blade

How to measure the power factor of household led light bulbs?

 

How to measure the power factor of household led light bulbs?

 

The power factor is very important factor, because the high power factor can reduce the loss of the distribution network. Reduce the use of electricity to the environmental impact of the most effective way to reduce waste, and regulatory agencies around the world are further strict power factor specification. One example is the Energy Star solid-state household led light bulbs lighting energy efficiency specifications (09/12/07), which provides residential lighting products, power factor (PF) should be greater than 0.7, commercial lighting products, power factor (PF) should be greater than 0.9.

 

LED light bulbs and lighting manufacturers are to respond to these demands, they want their products with the highest possible versatility. Therefore, they are very compatible with a variety of dimmers LED driver circuit, high efficiency and power factor of 0.9 or above. Household led light bulbs by the III – IV compounds such as GaAs (gallium arsenide), GaP (gallium phosphide) semiconductor GaAsP (GaAsP), made ​​the core of the PN junction. It has IN general PN junction characteristics, the forward pass, reverse cut-off, breakdown characteristics. In addition, under certain conditions, it also has optical properties. Forward voltage, the electron from the N region into the P region, and holes from the P region into the N region. Go to the other region of minority carriers (minority) part with the majority carrier (multiple) composite and shine.Known as the led high bay source for the longevity lights. For the cold light of the solid epoxy resin, light body and no loose parts, there is no filament light easy to burn, heat deposition, the light fades and other shortcomings in the proper current and voltage, the service life of up to 60000-10 million hours, more than 10 times longer life than traditional light sources.

The improvement of dimming controller of dimmable led downlight

 

The improvement of dimming controller of dimmable led downlight

 

Lighting controller to the line dimming or secondary side of the dimming way to work. The simple line dimming the forefront of SCR controller. This is the most commonly used lighting control, but unfortunately, the use of SCR controller when the dimming of the dimmable led downlight produce a large number of problems. Flexible programmable control functions can be controlled step-down pressure limiting magnitude, the light switch time arbitrarily set. Control mode and sometimes control, light control, manual control, PC remote control and location according to latitude and longitude of automatic control. Soft start, soft transition, the soft-off function to prevent the impact of voltage and cold start current of the lamps, significantly reducing the damage rate of the lamps. Preheat start time, dimmable led downlight, mercury lamps with adjustable lighting can be more fully warm-up, a smooth transition to the normal working condition.

 

To achieve control of the whole dimmable led downlight, and there late at night and then step-down to adjust the flow function, the energy saving effect is more ideal. The perfect re-start function when the load fault, the end of the external power supply failure, automatically re-lit lamps. Control mode and sometimes control, light control, manual control, PC remote control previously used on led high bay and automatic control according to the latitude and longitude of the place of use (optional). Three-phase light switch time and the output voltage can be adjusted independently, which can be accessed imbalances and different types of load. Programmable mode of maintenance, ease of maintenance of lighting systems, maintenance and lamp replacement. Reserved for the normally open contacts of a group of control by the clock in order to achieve a special control. Contact capacity 7A/250VAC.

 

The delisting of incandescent light give dimmable led downlight a chance

 

The delisting of incandescent light give dimmable led downlight a chance

 

Several dealers said that the profits are not high sales of LED energy saving lamps, generally only about 10 percent of the family of 8-watt LED lights only ex-factory price of 35 yuan. So, what factors led to the high price of dimmable led downlight In this regard, specially came to the professional production of LED energy saving lights Electric Co., Ltd. of Hebei Long right to visits.

 

In a 600 square meters of production workshop, Liu and more than 50 other workers sitting in the parts of the conveyor belts, hands skilled assembly proceed orderly. Liu introduced a small energy-saving lamps looked at the structure is very simple, but it must be more than 20 process, if a process is not rigorous, it may cause the lamp is not lit.

 

Liu’s work is a cob, green beans the size of the lamp beads into the predetermined mold, the mold needs a total of 37 lamp beads is an essential part of about a 2-watt dimmable led downlight. Liu will be inserted to the good parts into conveyor belt, and quickly picked up by the next person, exposed to the metal line cutting, welding, and then sent to plug the power supply board at the conveyor belt, after which they tested , welding leads, the combination of detection, aging test, a road process, a small LED energy-saving lamps can produce.

 

Lines more than 50 workers a day can produce more than 10,000 led high bay. However, although the yield big profits are not high.

 

Wu Zhanbing come up with a 20 watt LED energy-saving lamps, the only light a total of 330 lights bead composition.

Ip65 led downlight: modification of power factor

The LEDs (LightEmittingDiode) light-emitting diode, is a solid state semiconductor devices, which can be converted directly into electricity for light. The heart of the ip65 led downlight is a semiconductor chip, the chip attached to one end on a bracket, one end is negative, the other end to connect the positive power supply so that the whole chip to be epoxy encapsulated. The semiconductor chip consists of two parts, the part of the P-type semiconductor, the dominant hole in it, the other end of the N-type semiconductor, here is mainly electronic. But the two semiconductor connected when they form a PN junction. “When the current through the wire to the chip, the electrons would be pushed to the P region in the P region electron-hole recombination the form of photons, then it will emit energy, which is the principle of LED light. The wavelength of light determines the color of the light is determined by the formation of the PN junction materials. The technology has matured, one of the signs is ip65 led downlight lighting standards and norms have been put forward. Stringent efficiency requirements already exist for quite some time, and will continue to improve.

Ip65 led downlight: modification of power factor

LED brightness is necessarily related to the led high bay light-emitting angle, the smaller the point of view of the LED the higher the brightness, no super-bright ultra-bright, that is to lie to children, if it is good quality LED regardless of which the brightness of the LED manufacturers are similar, just not the same production process, service life is slightly different, because we are using it a few LED chip abroad.

LED street light market feels sick

 

LED street light market feels sick

 

Led street light market eats too much “Victoria C”.

Throughout mainland China’s led street light market development of the cause, how to see how like a farce, all followed a policy based on hearsay evidence, that was really a bit! But some people are this way, this is not just to take this opportunity to hype a cargo you serve out is not the point, focusing on increasing the corporate visibility, the industry look forward to the prospect of the stock to follow up a penny the heart does not exercise, to make to a lot of money, this time the goods you serve out very clearly not so important.

 

Led street light market doesn’t equal to “Dad”

At least three years ago, the industry as a whole aware of the led high bay in such a state is starting to not market, however, three years time as fleeting, the product as product, price also fell, sales or as sales, of course, the results also or that kind of performance. But this is not a matter of concern not, but listed. Use of government support for this industry can smoothly fishing GEM Listing.

 

Consumer market in the end what

The development of products of the industry is a vital cornerstone of the intention to do the product will always be people out in the confusion of the night you can see a glimmer of hope. And this heart at least to reflect on the concept of humanity. The approach is certainly more than difficult, blowing but also blowing, what to say mouth-blown balloon cannot get blown, but the greater the closer the brink of destruction.

The United States developed super high flux led

The United States developed super high flux ledThe United States IBM and Duke University researchers recently succeeded in single wall carbon nanotubes ( single-walled carbon nanotube ), a high brightness light. They let the nano carbon tube part hanging in the silica substrate, led high bay  and the single carrier operations ( unipolar operation ), super high flux led, which results in carbon nanotubes suspended and supported to form the connecting surface of a high brightness light.

Researchers in the chemical vapor deposition ( chemical vapour deposition ), the diameter of 2to 3nm nano carbon tube horizontally on the fluted structure ( trench ) silica substrate, super high flux led, so that the carbon tube part across the top groove, adding palladium ( palladium ) as the source and drain, in the single carrier transmission conditions (i.e., the gate voltage of less than about3.1 volts and can cause the hole transmission, the gate voltage is greater than – 2.1 volts would trigger electronic transmission ), super high flux led, carbon nanotubes are substrate supporting and hanging part formed by the junction of emits infrared light, the luminous efficiency in the3 A current about every square nano107 a second photon, is a large area of LED105 times higher.

Researchers believe that the nano carbon tube light-emitting reason, lies in the nano carbon tube is supported and suspended part of the ground near the surface, energy band bending, the electric field can accelerate the carrier, and then generate excitons ( exciton, namely bound pairs of electrons and holes ); when the electron-hole pairs when combined with will shine. super high flux led. The researchers calculated, the excitation efficiency is respectively from two ends of electron and hole injection combined with efficiency more than 1000 times.

This study proves that in the low dimensional nanostructures, electron and hole has the very strong attraction,  super high flux led, carrier and atomic vibration coupling is weak, it also demonstrated for the first time in one-dimensional systems, molecular heat carrier ( high energy carrier ) impact excitation ( impact excitation ) phenomenon.

Since carbon nanotubes is issued by the1-2/ M wavelength of infrared light, so it has application in the optical communication potential, at the same time, the emission wavelength can be tuned by changing the diameter of carbon tube to be adjusted. In addition, super high flux led, the future of these carbon nanotubes luminous body can also be associated with the same carbon tube or silicon electronic components integrated on the same chip, to become the new electronic or optoelectronic components.

LRC mr16 light fittings–the development of a new type of testing equipment

LRC mr16 light fittings--the development of a new type of testing equipmentRensselaer Institute Lighting Research Center ( LRC ) scientists recently in light is how they affect the human research progress. LED high bay, The scientists also developed a which can simulate the human mechanism model, the model is able to simulate various human circulatory system, human circadian rhythms, mr16 light fittings, such as body temperature, hormone secretion, alertness and sleep mode. Center for the study of research mainly focus on the human brain research.

The physiological cycle of light conversion model can be provided for researchers to test and to explore building a light influence on human basis. LRC research director Dr . Mark Rea said” the model in two aspects the enormous role, on the one hand, in theory, mr16 light fittings, it is to the human nervous mechanism and simulation plays an important role; on the other hand, the actual operation, it is to predict different sources give different effects of human circulation system is very important.”

Rea said, the model can be used as optical multi body simulation research on the influence of it, mr16 light fittings, as people on the same theory visual photometry. Light quantification for stimulation of the human circulation system in exploration is how to regulate the body mechanism illumination of far-reaching significance. This study also need to consider the spectrum antagonism. mr16 light fittings. When the wavelength of the light beam ( yellow light ) is added to the short wavelength light beam of white light on the human body, regulating effect will be reduced.

The LRC researchers reveal, this model is based on the recently published electrophysiological and neuroanatomical theory. Using this model, the researchers were found to directly reflect the light of the retinal nerve, is usually said to photosensitive retinal ganglion cells, mr16 light fittings, namely ipRGCs, other findings include a photo organization.

The LRC researchers will further improve the model, the experimental results for the practice.

New technology of flat panel display test mains downlight

New technology of flat panel display test mains downlightThe flat panel display ( FPD ) active element feature analysis is similar to the semiconductor integrated circuit testing. However, in order to optimally improve LCD, OLED and LEP testing speed and precision, the need for the existing parameter testing system, mains downlight, connecting cable and test method for appropriate modifications.

No sequence silicon LCD testing should resolve the ultra-low current measurement mains downlight

No sequence silicon ( a-Si ), active matrix liquid crystal diode ( AMLCD ) with traditional techniques, which still dominate the market, such as mobile phones, as well as most of the TV desktop display. Although the a-Si thin film transistor ( TFT ) is a new generation of low temperature silicon polymer ( LTPs ) LCD speed smaller, larger, need more external circuit, led high bay now in its fifth generation and sixth generation products, mains downlight, using the a-Si basal technology to create a larger display, manufacturers are trying to cut costs method of.

Cost is the main consideration, so the testing time must be reduced to the minimum, generally in the product stage need to test parameters are: Id-Vg scan, turn-on voltage of Vth, forward current,  mains downlight, leakage current, IL switch ( response time ), contact impedance and capacitance.

These measurements are in LCD flat outer rim surrounding a test element group ( TEGs ) on the. Sometimes, mains downlight, also measured some work pixels to check In-dium / Tin oxide ( ITO ) conductive layer properties.

Typical system includes the confirmation of FPD in the active part properties, including DC source measurement unit ( the source table ), switch matrix ( can use a set of equipment for testing a plurality of devices ), the probe station and a cable connection. Due to the enormous size of flat, mains downlight, FPD product test equipment is quite large, and is highly automated.

OSRAM launches mini led studio lighting

OSRAM launches mini led studio lightingsmall–OSRAM mini spiral energy-saving lamp features. Because the diameter of only 7.6mm T2diameter glass tube, OSRAM mini spiral energy-saving lamps energy-saving lamps OSRAM became the youngest member of the family. Mini spiral energy-saving lamp volume, than with the power of the traditional U type energy-saving lamp is reduced by 50%, led studio lighting, its dimensions basically and spherical or candle incandescent lamp a Like, can directly replace and do not need to worry about the size problem.

Statistics show that: the use of incandescent lamp the overwhelming majority of customers choose E27lamp, incandescent lamp and candle basic customer choose E14lamp. LED high bay  In order to meet customer demand, OSRAM mini spiral energy saving lamp provides three kinds of power, led studio lighting, two color, two caps in all twelve kinds of specifications for customer choice. OSRAM also according to the customer ‘s habits, two lamp provides two different shapes: the E27lamp and incandescent lamp shape similarity; E14lamp and incandescent lamp similar shape candle.

The introduction of energy-saving, OSRAM mini spiral energy-saving lamp series, in the energy field beyond the previous similar products, led studio lighting,  light efficiency is up to 63lm / W. Compared with an incandescent lamp energy saving more than 80%, and the traditional U type energy-saving lamp compared to saving up to 17%, led studio lighting, all can achieve national green lighting efficiency. In1 1W mini spiral energy saving lamp for example, replacing the 60W incandescent lamp after the effective life period can save more than200 yuan charge of electricity. 6000 hours of use, led studio lighting, electricity 0.7yuan / degree OSRAM mini spiral energy-saving lamp energy saving light, delicate appearance, particularly suitable for a variety of wall lamp, Tongdeng, chandeliers and other small lamps,led studio lighting, is to replace the ordinary spherical and candle incandescent lamps are preferred.

Henderson semiconductor posts led street lights bangalore

Henderson semiconductor posts led street lights bangaloreAccording to the Nanjing Henderson Technology Company Limited Zhou Ming introduces, our country electric power consumers, in addition to the large and medium-sized enterprises, the municipal lighting power consumption ( such as street lights, neon lights, advertising light boxes and so on ) are also very amazing. The current municipal selected lamps have short service life, led street lights bangalore, loss of large, high rate of repair deficiency. According to the analysis of the relevant departments, an ordinary street lamps lighting time of a day is 12 hours, the power consumption of about 3 degrees, year need to charge1000 yuan; street lamp high damage rate, resulting in municipal relevant departments need to invest a lot of manpower and material resources to repair. New semiconductor lighting will gradually replace the traditional street. led street lights bangalore, Semiconductor technology afterwards causes microelectronics after the industrial revolution, and the birth of a new industrial revolution — a revolution in lighting, whose symbol is the semiconductor lamp will gradually replace incandescent and fluorescent lamp. At present, led street lights bangalore, our country increasingly serious energy crisis, and semiconductor lighting it can achieve substantial power-saving purpose, is expected in 2010 China’s electricity consumption will reach2.7 trillion-degree, lighting electricity consumption will exceed 300000000000 degrees. Because the same brightness, semiconductor lighting electricity consumption is only1 of the incandescent lamp / 10,1/ 3as long as the incandescent lamp is semiconductor lights replaced, led street lights bangalore, each country will be able to save electricity nearly 100000000000 degrees, the equivalent of a project of the Three Gorges power generation. As the semiconductor lighting has the advantages of energy saving, environmental protection, long life advantages, promotion of semiconductor lighting will give our country to implement the scientific outlook on development, building a conservation-minded society brings far-reaching influence, at the same time, it will affect China’s energy strategy.led street lights bangalore, Semiconductor lighting leading enterprises — Nanjing Henderson technology shares in the company is with the market oriented, in order to display and semiconductor lighting for the leading products of high-tech enterprises, providing high-quality information display system, led high bay the application of high-power LED products and semiconductor lighting engineering solutions. The company has a strong technical team of Dr. Liang Bingwen CTO, which the company is the Ministry of science and technology, national semiconductor lighting project expert, national semiconductor lighting project tackles key problem plan major project management office and as a consultant, national semiconductor lighting industrial technology development and strategic studies expert team, led street lights bangalore, responsible for the completion of the national semiconductor lighting in long-term technology development planning work.