作者：Blade

lumiere led in 2013

2012 will soon be over, and this year for the LED industry can be described as mixed, although in many countries, including China, have begun to prohibit the sale of incandescent, LED lighting sales and scheduled the outbreak, but there has been the closure of many lighting manufacturers chain storm Overall, however, there are manufacturers wreathed in smiles, earn pours LED market this year is a normal adjustment year for the LED lighting market in 2013, with the replace the 40-watt (W) incandescent LED bulbs retail minimum The price has reached $ 10 sweet spot of industry have been optimistic about the overall LED lighting market is expected next year to go warm lumiere led, so the industry to do now is to do a good job of technical reserves and program selection, just waiting for the market outbreak devote. Here, combined with Power Integrations, several major LED manufacturers to talk about the latest release of the new 2013 LED lighting solutions four trends.

lumiere led in 2013

The dimming technology challenges facing the LED lighting applications, very large, due to LED lighting to use more current drive mode, dimmer multi-voltage dimming considerable challenges in compatibility, however, this is also to distinguish the the program merits of a weapon, LED dimming solution in the past, the common dimming range, suddenly lights dimming lumiere led, dimming flashing, seriously affect the user experience, but With the PI and other company-specific programs launched G24 LED dimming is expected to solve, PI latest LYTSwitch IC has excellent dimming performance can be achieved, even in low conduction angle can easily reach NEMA startup speed of SSL6 standards, another of the drive is very fast, usually less than 500 milliseconds, even if 10% of the amount of light output is turned on its startup speed is also fast, the actual program, the use of the bulb LYTSwitch IC design able to off almost the same as when dimming the angle of conduction, which virtually eliminates suddenly become brighter. Furthermore, the dead zone in the SCR light is eliminated, this is because the LYTSwitch controller can ensure that when the dimmer is a start working immediately dimming. In this regard, the PI-called proprietary circuit technology from dimming curve, PI program does advantages are obvious.

single-stage circuit architecture gradually occupy the mainstream
In the previous program, in order to obtain better dimming characteristics, many solution providers adopt the two-tier structure, namely PFC (power factor correction) + isolated DC / DC converter architecture, this design can effectively reduce power pattern wave, because the designers believe that the single-stage PFC circuit ripple is too large, the fear arising from the life of LED luminous efficiency and color temperature, therefore, the use of two-stage circuit more, and now, with the single-stage high switching frequency the launch of the program, the advantages of the single-stage circuit is very obvious, because in terms of efficiency, two-stage circuit is difficult with a single-stage confrontation, several vendors can be a single-stage program to do more than 92% efficiency, two-stage circuit lumiere led, usually Only about 85% efficiency.

 

led gu10 special base standard

As LED technology continues to mature and costs continue to decrease, LED spotlights have been widely applied to a variety of places. The development and popularization of LED spotlights facing many problems, how to develop a cost-effective LED spotlights, how to solve the heat dissipation problem of high-power, high flux LED spotlight, how to achieve modularity and interchangeability of LED spotlights, how to fully embody the LED Tubes long-life, high luminous efficiency led gu10, controllability characteristics, so that people enjoy the colorful lighting and access to more affordable, more secure and reliable LED products, also requires the joint efforts of the manufacturers and industry professionals.

Maturing security certification

led gu10 special base standard

Mostly refer to the traditional lighting LED spotlights the safety requirements, and based on its own characteristics, and the formation of a set of safety certification standards.

Most of the safety requirements of the current LED Spotlight reference to traditional lighting, and according to the characteristics of the LED lights to form a safety certification standards. Currently, in LED spotlights certification, the international community is mainly to European CE and UL certification in North America-based, voluntary certification (CQC) in China.

CE certification contains LVD and EMC, LVD is executed in accordance with the EN60968 standard (will be upgraded IEC 62.56 thousand); perform EMC according to EN55015, EN61547, EN61000-3-2 and EN61000-3-3 standard. In addition, LED lights are usually also need additional reference to IEC 62471, light biosafety testing. In North America, it is usually required UL safety and FCC EMC certification. UL implementation of standards UL1993, UL8750 and UL1310; FCC implementation of standards for the FCC PART15 Subpart B. In China, LED spotlight is a voluntary certification (CQC), perform standard GB24906-2010 (safety) and GB 17743-2007 (electromagnetic compatibility) led gu10.

In addition, the performance of LED spotlights, there are many other standard requirements. U.S. Energy Star (ENERGY STAR), energy certification requirements (implementation of standards for CQC3129-2010), these requirements are LED Spot color temperature, color rendering index, initial luminous flux, luminous efficiency, lumen maintenance life, the center beam intensity, nominal power, power factor, and product identification provisions.

Life is damaged in many electronic products to be judged, but the LED is a life-long light source, use a long time are not bad. Since the output of the luminous flux attenuation over time, so the industry, generally light decay to 70% of the time required to define the life of the LED light source, which is L70 is. With advances in technology, the LED light fades more and slow to complete test light fades to 70% of the time it is difficult to do. Exponentially due to the life of the electronic product, the LED is usually done shorter aging time by sampling the light decay data led gu10, and then to the exponential function to calculate the light decay to 70% of the time.

high lumen rgb led

The visible light emitting diode (LED) to both high efficiency and long life characteristics. Currently, a wide range of their applications. Manufacturers have in-depth study of the LED devices have been developed with higher luminous flux, longer life, more colors and more lumens per watt of new devices. Accurate and cost-effective testing is essential to ensure the reliability and quality of the device high lumen rgb led.

high lumen rgb led

LED test with a different type of test sequences in various stages of production, such as the design and development phase of the test, wafer-level testing of the production process, and packaged final test. LED Tube Light test generally contains electrical and optical measurements, this paper focuses on the electrical characteristics of the analysis, the only part of the optical measurement techniques introduced in the appropriate position. Figure 1 shows a typical diode electrical I-V curve. The complete test should contain a large number of voltage values ​​corresponding to the current operating point, but under normal circumstances, a limited number of sample points sufficient to test the quality factor of the device.

 

Figure 1. Typical LED DC I-V curve and test point

Many tests required to provide a known current and measuring voltage, while some tests need to provide the voltage and then measuring the resulting current. Therefore, the high-speed test instrument with an integrated, synchronized source and measurement functions such testing is ideal rgb led.

Forward voltage testing

Forward voltage (VF) test test the LED test sequences, visible LED forward voltage. When the load a forward current in the diode, it begins conduction. Beginning at low current, the voltage drop on the diode rising rapidly, but as the driving current increases, the voltage slope begins to flatten. Diode generally work in a relatively constant voltage region. Diode tested under these working conditions is also very useful. The VF testing need to provide a known current and then measuring the resulting voltage drop in the diode. Typical test currents ranging from several tens mA to a few amps, while the size of the voltage generated is usually in the range of a few volts. Some manufacturers use the results of this test sorting devices, because of the color of the forward voltage of the LED related products (by color or complementary color wavelength and its purity common characterization of color qualityrgb led).

 

smd led heat sink

Traditional thermal conductive material for metals and metal oxides, as well as other non-metallic material, such as graphite, carbon black, A1N, SiC, etc.. With the development of science and technology and the production of many products of the thermal conductivity of the material put forward higher requirements, has excellent overall performance, light weight, chemical resistance, and excellent electrical insulating properties, impact resistance, and easy processing molding . The thermal conductivity of insulating polymer composite materials because of their excellent overall performance is more and more widely used smd led.

However, due to the polymer material is more than a poor conductor of heat, limiting its application in thermal conductivity, and thus the development of new polymer materials with good thermal conductivity, become an important development direction of the thermal conductivity of the material now. Especially in recent years, with the rapid development of high-power electronics, electrical products, is bound to appear more and more heating products, leading to product efficacy to reduce life shortening. Some data indicate that the electronic components temperature is increased by 2 ℃, its decreased reliability 10%; 50 ° C when the life expectancy is only 25 ° C when the 1/6.

smd led heat sink

The heat conductive filler is mainly divided into two: one is a thermal insulating filler, such as a metal oxide filler, a metal nitride filler. Another is the thermal conductivity of non-insulating filler, such as carbon-based filler, and various metal filler and the like. The former is mainly used for electronic components encapsulated materials electrical insulation performance requirements of the occasion, the latter mainly used in chemical equipment, heat exchangers lower electrical insulation performance requirements of the occasion. The type of filler, the particle size and distribution, the filling amount and the filler and matrix interface between the performance of the thermal conductivity of the composite material has an impact smd led.

The thermally conductive plastic using the matrix polymer: PA (nylon), the FEP (perfluoro polypropylene), PPS, PP, PI epoxy resin, POM, PS and PS and PE composite material or the like.

The current domestic and international power LED Flood Light industry lamps commonly used aluminum as a heat sink material of the shell, using thermal plastic shell can save a lot of energy and improve production efficiency, reduce the cost of LED products have a very real economic significance. Use plastic could greatly expand the lighting engineers to develop products Ling and creativity, more lightweight design beautiful products for faster promotion to the mass consumer. Based on the basis of extensive research, we propose to use cooling plastic mold production 8 watts, whether the temperature of the various parts of the 10-watt LED downlight base, check product conform to the requirements for eligibility to test heat plastic for mass production smd led.

osram led in medical use

1 IPL (photorejuvenation)

IPL technology is defined as the use of continuous intense pulsed light the way for non-ablative skin rejuvenation treatment in the low energy density. Within a few short years since its inception in 2000, photorejuvenation technology rapidly growing popularity of the country, has been widely used in major cities, has become one of the primary means to improve skin photoaging, this technology can significantly improve skin wrinkles, texture rough, irregular pigmentation and large pores phenomenon has been recognized many technical professionals and beauty demands. The characteristic histological changes of skin photoaging elastic fiber degeneration and dermal matrix collagen fibers mature obstacles, resulting in the skin laxity and wrinkles osram led.

The study found that the visible to near infrared LED light to penetrate the skin epidermis to reach the dermal layer of photothermal and photochemical effects, prompting the elastic fibers and collagen fiber regeneration and re-arranged, so as to achieve the effect of reducing skin wrinkles, increase flexibility.

osram led in medical use

The prevention or treatment of inflammatory pigmentation

Post-inflammatory skin pigmentation in the skin, the physical and chemical beauty is common, difficult to avoid the phenomenon, particularly apt to occur in Asian populations. For example, in clinical practice to reduce the degree of skin pigmentation after laser treatment generally too strong season to avoid ultraviolet the Zhu Huanzhe avoid the sun, wear sunscreen, but post-inflammatory pigmentation is difficult to completely avoid. In recent years, the study found that of 660nm LED Rgb Lights can prevent or even treat this inflammation after skin pigmentation, which will be a new research focus for skin beauty industry osram led.

3. Promote wound healing

Can be seen in the near infrared band of the LED light can promote the growth of epithelial cells after trauma and promote wound healing. Very good therapeutic effect for the healing of chronic ulcers in diabetic patients with lower extremity.

4. Reduce inflammation

Have series of studies show that the LED having an anti-inflammatory role. The study found that the 635nm LED light can be suppressed gingival fibroblasts release of inflammatory mediators – prostacyclin E2 (PGE2), thereby reducing the inflammatory response of the gums. In the pulsed dye laser treatment of the skin photoaging If the LED light source in advance before irradiation can reduce the dye laser induced skin erythema, swelling, and pain and discomfort. LED light source ahead of irradiation can reduce the side effects of radiotherapy in breast cancer patients before radiotherapy.

5. Scar prevention

Keloid clinical impact of beauty but also difficult kind of skin disorders, the treatment of skin damage caused by connective tissue hyperplasia. Patients often have physical scars. Start small and hard red papules clinical slowly increasing, producing a circular, oval or irregular scar above the leather was a crab-like stretched out skin smooth, shiny, and may be associated with pain, itching and discomfort. Difficulties in clinical treatment, the effect is not ideal. Studies have found that LEDs can significantly improve the patient’s pain, itching and discomfort, the scar flattened, and also has the advantages of non-invasive osram led.

6. Role

In addition, LED can also serve as a non-ultraviolet phototherapy instrument, used for photodynamic therapy, treatment of alopecia, alleviate skin damage after ultraviolet irradiation, and so on.

In short, as a new type of light source, LED has been gradually applied to the skin medicine, with the innovation of LED lamps and medicine the LED mechanism of biological effects research, LED applications in dermatology will have limitless prospects. LED has high security, and can be used as a home medical equipment.

 

 

cree led street lights design

Based on a tight budget considerations, the use of LED lighting can save electricity through less maintenance cycle and power-saving innovations dimming technology.

After the evolution of technology in recent years, LED light output, luminous efficiency and service life has been significantly improved, so more and more attractive to the majority of applications for various other light source in the past, especially street light is can Using the application of LED  technology cree led to be addressed.

cree led street lights design

LED-based street light first in a few years ago in the streets, although they are mainly used to show the design concept or campus test lamp. Yellow phosphor is the only available and stable at the time, one of the phosphor to produce white light output with a blue chip. Most of these lights are cool white G24 LED Light design, color temperature of about 6000K even higher. Unfortunately, most people do not like the cold white light emitted by these street lights, some even complain about the cold white light will bring a cold feeling. Others think the color is pale in the cold white light source irradiation.

LED and phosphor manufacturers heard for the first-generation prototype set feedback, and for street lighting applications developed using more natural, neutral white 4000K color temperature of the new high-brightness output LED. Example, Avago Technologies (Avago) ASMT-JN32-NVV01 will be able to provide a 350mA the 100lm or 700mA current offers light output of 160lm minimum typical 4000K correlated color temperature (CCT).

LM-80 LED lifetime test proposed standard requires the LED light source must have a minimum of 35,000 hours of life, the new high-power LED high junction temperature cree led can reach a minimum of 60,000 hours (L70, B10). View to a daily average of 12 hours (approximately 4400 hours) the use of time, the street lights use the latest LED technology can easily reach 10 years of life without the need to replace the light source.

, Modern LED package has a low thermal resistance of 6 ~ 9 ℃ / W (K / W) from the point of view of product package. This helps as much heat as possible is passed from node to the heat sink. In addition, the light output under different junction temperature very stable at 25 ° C / to the changes in the range of 110 ° C / junction temperature is less than 20% cree led.

 

 

led bulbs life span

In the the numerous green light applications, LED relative to other light source solutions more energy-efficient, easy to the assembly design a light source technology, which in lighting source applications, high-power white LED compared with the most frequent light-emitting components, butthe white LED luminous efficiency, single power performance has R & D progress actually white LED luminous uniformity, packaging material life still exists, especially in the application of the chip cooling limit is the development of the LED light led bulbs source applications first and foremost must beimprove the problem …

High power white LED used in the day-to-day lighting purposes, in fact, received increasing attention in the green light, has become the first choice of the development of environmentally friendly light source. But in fact the white LED are still many technical bottlenecks to be overcome, there are related improvement program to strengthen the focus on features and performance of white LED luminous uniformity, the life of the packaging material, heat strengthening all aspects of design bottleneck improvement.

led bulbs life span

The green light increased demand for high-power white LED applications led bulbs qualify

LED Panel Light source to be the main cause of all ages, is nothing more than the product of long life, light – high power conversion efficiency, material properties can be fitted in any plane. In the development of the day-to-day lighting source, due to the need to achieve practical lighting needs, the original to indicate that the use of LED lighting applications will not be able to correspond directly from the chip, package, carrier board, production technology and an external circuit must be strengthened, in order to achieve the high power required for lighting purposes, high brightness lighting utility.

Observed on the level of market demand for white LED lighting applications market development, it can be said future higher dosage of the project, but to use utility, white LED lighting applications must focus on functional improvement. One is to strengthen for the LED chip led bulbs, e.g., to increase their optical – electrical conversion efficiency, or to increase the chip area, to allow a single LED light emission amount (flux) reaches its design limit. Second, is a compromise design program, the more difficult to continue to increase the area of monolithic LED chip under the premise switch to multi-chip LED chip is packaged in a light source module, but also the practical technical solutions can be achieved close to the aforementioned method .

 

spectra led grow light aging test

LED light-emitting principle:

LED industry in China started in the 1970s. After 30 years of development, China’s LED industry has initially formed a relatively complete industrial chain, including the production of LED epitaxial wafers, LED chips preparation, LED chip packaging and LED product applications, including.

LED lighting LED III – IV compound, such as GaAs (gallium arsenide), GaP (phosphide gallium), GaAsP (gallium arsenide phosphide) and other semiconductor made of, its core is a PN junction. So it has the general PN junction IN characteristics, namely the forward pass, reverse-blocking breakdown characteristics. In addition, under certain conditions, it has a light emitting characteristic. Forward voltage, electrons from the N-region into the P region, the injection of holes from the P region N region. Into each other regional minority carriers (minority) part of the compound and shine with the majority carrier (number of children). Assume that luminescence occurs in the P region, the injected electrons and valence band holes directly composite and light-emitting, or first captured by the luminous center hole recombination. In addition to this light-emitting compound, also some electronic non-luminescent center (the center between the conduction band, dielectric tape near the middle) capture, and then with the hole recombination, the energy of each release is not and can not form visible.

Market for LED lighting products spectra led grow light:

LED explosion proof light source that some people call the long life lamps, which means the light never goes out. Solid cold light source, epoxy encapsulated, light body and no loose parts, there is no filament light easy to burn, heat deposition, the light fades and other shortcomings, the service life of up to 60,000 to 100,000 hours, longer life than traditional light source 10 times or more.

spectra led grow light aging test

Therefore, to achieve this ideal state, the anti-aging ability is particularly important.

Content:

Aging test of an LED lighting products spectra led grow light:

LED backlight and lighting products for a long time aging test is a very important test, aging test can be detected early fault LED products in the long-term use may produce light fades, color temperature change, leakage, and conducive to the stability of the product. The ITECH power and burn-in test software is mainly used in aging test LED backlight and lighting products.

LED the aging lighting products test results and use of equipment have a great relationship, aging equipment and LED lighting products, must be guaranteed in the full heat of cases to determine the best time of aging, by aging system monitoring data, analysis and comparison, to get the most accurate test data, so as to achieve the purpose of the production and testing.

Second, LED aging test application of the power supply and the aging system should have features:

LED current work is very special, the test system in order to obtain reliable data. In general, the power LED aging test application and aging system should have the following characteristics:

1, high power than the NC DC power supply, wide voltage and current usage, the wide range of applications spectra led grow light;

2, can automatically control the rate of change of the voltage and current, the maximum possible reduction in cost;

 

3w led grow for new year

1 Introduction.

With the rapid economic development in recent years, the car’s design and manufacturing technology are also increasing, also gradually rich functionality of the car, the car has become an essential part of people’s daily lives. However, the possibility of driving a vehicle traffic accidents occur at night or in low-light situations, and can account for about 27% of the total traffic accidents, and most of the time there will be personal harm. So 3w led grow driving at night must have good lighting.

2 car lamps.

Automotive lamps from the 1880s, the world’s first light auto lighting classic cars hanging gas lamps to the development of the first electric lights in 1912. Early automotive incandescent lamps, the lighting is dim, in the situation of the increasing number of vehicles and continuously improve the speed, incandescent can not meet the day-to-day needs of the lighting, car lights and the development of higher brightness tungsten halogen lamps high-intensity discharge lamps, brake lights, turn to a series of lights, rear fog lamp types, played a key role in order to avoid driving at night, when the rear-end or turn collided. Lighting technology with improved productivity is also gradually developed, including light-emitting diode technology (Light Emitting Diode LED High Bay Bulbs ), especially in automotive lamps automotive lamps. Automotive design in recent years, more and more use of LED 3w led grow lights, modeling is more and more elegant, and the combination of various lamps use more to lead the trend and direction of today’s automotive lighting development.

3 car rear combination lamps of basic theory.

3w led grow for new year

The cars in the process of driving, the rear combination lamp can be obvious characterization of the car driving, docked and the steering state, so that a variety of vehicle driver to make a more reliable adjustment, safe driving. Modern automobile rear lamps commonly used form of modular lighting the lights of the various functions in the same light body inside nice and easy car driver identification. General rear combination lamps, including brake lights, rear fog lamps, cornering lights, reversing lights, rear position lamps, these types of lights have their role, as follows:

The brake lights: the brake lights (brake lights) is mounted on the rear of the vehicle on both sides when driving the brake pedal is depressed, the brake lights that lit the red light to remind the vehicles behind Note, do not rear-end . Brake lights that go off when the brake pedal is released when the motorist.

Rear fog lamp: car rear fog lamp is low visibility in fog, snow, rain or dust diffuse environment, easy to find and installed in the rear of the vehicle to the rear of the vehicle to other road traffic participants, luminous intensity more than taillight large.

Turn lights: turn signal is open to vehicles and pedestrians around prompt attention to the important indicator in the motor 3w led grow vehicle steering.

Reversing lights: lighting behind the vehicle roads and warning other person using the road, the vehicle is reversing or about to lights, color is white.

Rear position lamps: commonly known as a small lamp, is mainly used to indicate the presence of the car and broad width, easy to make judgments of the other vehicles in the car will be and when overtaking.

 

led grow light fixtures in China

Ceiling lamps, as the name suggests, the lamps above installed horizontally at the bottom is completely attached to the roof on so called ceiling. Its ordinary white light bulbs, fluorescent lamps, high intensity discharge lamps, halogen light source. The most popular on the market is the LED ceiling and Power LED Flood Lights, gorgeous appearance the LED Ceiling adsorbed or embedded in the roof ceiling lighting, indoor main lighting equipment.

With home decoration heat continues to heat up, the ceiling lamps changes with each passing day, is no longer confined to the front of the single lamp, but to diversify development, drawing on both the luxury and style of the chandelier, ceiling installation avoid the defect the shorter room can not be installed large luxury lighting. To make a more comprehensive understanding of the ceiling lamps led grow light fixtures, today I gave you in detail about the ceiling lamp of knowledge, in order to design and optional ceiling lamps reference.

(A) ordinary ceiling lamps

led grow light fixtures in China

1 ceiling lamp shape
Ordinary ceiling lamp shape although there are many, but the most common is round or square, the complex is more variety of bizarre Crystal Ceiling.

2 lamp ceiling lamp
Most of its lamp T5 fluorescent bending, many different specifications, mainly in the following led grow light fixtures.

3 ceiling lamp power

Ceiling lamp power and not clearly defined, and its power is most commonly used for 10W, 16W, 21W, 28W, 32W, 38W, 40W.

(B) the problems and shortcomings of the ordinary Ceiling

Low luminous efficiency.

The entire ballast energy saving lamps lighting effects only 55lm /, the most high-power U type only 80lm / W. And because all of these Ceiling mostly used T5 lamp, bending into various shapes. However, regardless of the final bend into shape, it is 360 degrees luminescence, wherein upward 180 degrees of the light must be reflected back only into useful light, and this reflection process will lose a lot of light. So, later made into lamps light efficiency of at least want to make a 70% discount. Is the light efficiency but also multiplied by 0.7. And when in actual use, the luminance decay with time quickly. For example the tricolor lamp T5 YH32RR16 of a Philips 32W ring, the color temperature for 6500oK, its luminous efficiency to 67lm / W, the total number of lumens 2150lm, in fact, only 70% of the light can take advantage of. Is 1500lm.

2 containing mercury

The low boiling point of mercury, at room temperature, was evaporated. A waste discarded fluorescent lamps broken, immediately distributed to the surrounding mercury vapor, the moment the mercury concentration in the ambient air can be up to 10-20 mg / cubic meter, exceeding the national maximum allowable concentration of mercury in the air (0.01 mg / cubic 1000-2000 m) times the body once inhaled 2.5 grams of mercury vapor that is life-threatening. And high penetration of liquid mercury, into the ground immediately after they fell into the underground pollution of groundwater led grow light fixtures. 1 mg of mercury is enough to contaminate 5454.5 kg of drinking water, to make it up to meet the safety standards for drinking water. Now desperate to promote energy-saving lamps, it is really irresponsible to our children.

3 low life

Energy-saving lamps in accordance with the phosphor divided: the mixed powder, halogen powder, the three primary colors. The life of halogen powder; hybrid the powder life in 4000 to 6000 hours 3000 to 4000 hours; the tricolor known more than 8000 hours.