LED drive

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LED driver (LED driver): contains the power supply and LED control circuit device, LED package (components), or LED arrays (modules) or LED lights.


Interpretation and LED above definition provides a basis for the difference between LED lights and LED lamps, LED light sour ce and LED lamps Overall the main difference is directly connected with the branch circuit, LED lights are designed to not intend to branch circuit directly connected products, garden led lights lighting is the product of a design to be connected directly to the branch circuit.


LED light engine, LED lights, but its characteristics between the LED lamps and integral LED lamps, the difference is that it contains a lamp that matches the connector, instead of the standard lamp with integral LED lamps and LED lamps is the difference between It can not be directly connected with the branch circuit. Can have a setting function of the light distribution and a standardized connector, the LED light engine can improve the maintainability of the LED lamps.


Second, LED lamps and light fixtures in the difference


outdoor light fixtures lamps and traditional light fixtures on the performance evaluation and design, there are many different places.

leading the the lamps trend into the market lights king

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First, the energy consumption of the end of the light decay. 1W LED brightness equivalent to 35W halogen spotlights. Local lighting, halogen and metal halide lamps the long river of history, take the absolute leadership position. Will be replaced by local illumination of the LED was born in the future.

Second, long service life, without having to replace the light source, no maintenance, which in fact is the consumer has been the biggest concern. Consumers, not professionals, professional testing equipment in the choice of products, professional maintenance of knowledge, and led flood light to address their worries.

Third, no filament, no glass to reduce heat loss, mechanical shock and vibration, consumer safety is their first consideration when choosing a product, it is well known, the filament light source, often fried wire phenomenon, which also contributed to the culprit of some fire.

The heat source of fire, burns, and LED 50% lower than the general halogen heat, glass, fragile, and most of the local lighting lamps surface is embedded in the ceiling, often injured by the human body may Mechanical shock and vibration in real life is happening, is not uncommon in the technology and outdoor lamps.

Fourth, the mercury-free, even to reach the limits of life, and no environmental pollution, human body without harm. Such a good lamp light source is undoubtedly the future of lighting the development of navigation standard. Know this word very few people in China. 2004 Athens Olympic Games to leave you with the most profound is the opening ceremony of the world s largest LED display frequency. It is a milestone of LED s around the world.

In fact the LED is also ordinary in our lives, such as traffic led rope lighting, landscape lights, stage lights. Barbara used to know another little less lighting. In the near future LED will replace the high-power lamps, and become the future king of lighting local lighting.

ancient town high-standard construction of LED lighting to promote the lighting industry to upgrade

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Traditional light sources in the lighting industry for the town to lay a strong industrial base and good market brand. However, the global demand for LED lighting industry is showing a trend of rapid growth, LED green lighting industry to replace the traditional lighting industry has become increasingly popular. Town development of LED lighting industry, both the lighting industry and the development of the situation required, but also the ancient town of an important way to promote transformation and upgrading of the lighting industry.

Suen Ming In fact, the ancient town on the LED industry for many years, the ancient town of garden led lights industry has taken solid steps, LED annual output value exceeded 3.5 billion yuan, accounting for a large half of the city s total output value of related industries. The end of 2009 to early 2010, the town set up the leadership of the Office of the New Energy and Industrial Development, and the introduction of LED and solar cell industry development strategic planning. Ancient town, decided to take different roads with other townships according to their own industrial base and advantages: market-drive n, specializing in LED lighting market, firmly grasp the pull upstream various aspects of development "engine".

Today, the town has established the goal of the development of LED lighting industry: to build the world s leading LED CITY ", through the planning and construction of a base, five-center, a demonstration project", "China Lighting Capital" new industrial clusters; to 2012 town LED and solar photovoltaic lighting industry and strive to reach 20 billion yuan to cultivate 1-2 annual output value exceeding 500 million yuan, 3-5 output value exceeding 100 million yuan of new energy enterprises; the completion of the provincial regional characteristics of new energy in the city industrial base, the ancient town into a world-renowned "LED CITY", become the domestic and international city lighting, energy-saving model for.

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Construction industry, public service platform to crack the industry bot tleneck

Since the beginning of this year, playing on the ancient town government in the field of LED lighting applications "main battleground" violent "tough fight" the lights are LED CITY "plan, the town vigorously promote the regional characteristics of Guangdong Province LED and solar technology industry base, LED and solar photovoltaic lighting engineering technology research center, LED and solar photovoltaic lighting design manufacturing center, warehouse and logistics center of the high bay lighting and solar products, LED and solar products and accessories sales center, high-level personnel service center, LED landscape lighting demonstration project, as well as science and technology enterprise incubation bases and other key projects. Of these key projects a total investment of 780 million yuan, only the construction of the "town s Central Business District LED landscape demonstration project" investment reached 130 million yuan.

At the same time, the town and the Beijing research institutions to develop "one-stop world lighting patent information service platform"; quality inspection center in Guangdong Province to jointly build public R & D platform for LED lighting products with Zhejiang University, to participate in the national standards for general lighting LED series drafting; cooperation to build the industrial base and technology business incubator base, Zhongshan University, South China University Photonics Research Laboratory. At present, the business incubator building and lighting R & D center will be put into use at the end of the year, and successfully apply to become a new energy characteristics of industrial Combination of demonstration bases in Guangdong Province.

LED energy-saving lamps and traditional lamps

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LED lamps
 The traditional lamp
 
Security
 A light source operating temperature of 60 degrees around the operating current mA level, does not produce sparks, greatly improving security.

2, the lamp te mperature is low, will not ignite the explosive gas, there is no safety hazard

3, the lamp temperature is low, the glass is not easy scaling of atomization, without reducing the lighting effects, less water rupture fall wounding.

4, high luminous efficiency, wattage, special occasions can be converted into a safe voltage of 36 volts.
 1, the traditional incandescent and halogen led ceiling lights source operating temperature above 300 degrees to fifteen hundred Baidu, operating current, aging prone to spark, poor security.

2, the lamp surface temperature is high, there is the hidden danger of igniting explosive gas.

3, lamp glass, easy to scale atomization to reduce the lighting effects, high-temperature work is easy to water broken, falling wounding.

Power, current, voltage is 220 volts, there are security risks.
 
Energy efficien cy
 A photoelectric conversion rate, 80% energy saving than traditional light sources.

2, long life, high luminous efficiency, maintenance-free, with considerable economic and social benefits.
 1, most of the light source electrical energy into heat energy, resulting in energy waste.

2, the traditional light source life is short, the maintenance volume, labor costs and material costs increase, resulting in greatly improving the use of cost.
 
Maintenance
 A light design life of 50,000 hours, significantly higher than the traditional light source, suitable for long-term lighting environment.

2, the solid cold light source, epoxy resin, light body and no loose parts, there is no filament light easy to burn, heat deposition, the light fades and fast drawback.

3, the surface of the light, low temperature, lighting glass is not wearing perishable.
 1, the design life of incandescent 1000-4000 hours, sodium lamp is 8000 hours, a shorter life expectancy in high temperature or vibration environments.

2, the traditional light source and ballast in the shock environment vulnerability, maintenance of large amount of security risks.

3, lamp surface temperature, lighting glass is easily damaged.
 
Voltage adaptability
 1, the wide range of input voltage: AC90-270, and good adaptability.

2, the brightness of light constant, constant voltage constant current output, does not vary with voltage fluctuation and flickering.

Lit without delay phenomenon, frequent switching on the lamp life, no flash to reduce the visual fatigue.
 A poor adaptability of the traditional lamp voltage, the brightness with voltage fluctuation changes, poor stability.

2, the light switch is vulnerable to the current impact and damage, switch the outdoor light fixtures life.

Lit responsive differential delay phenomenon, and strobe likely to cause visual fatigue.
 
Environmental protection
 Ultraviolet and infrared spectra do not contain mercury and other harmful heavy metals, is the green lighting products.
 The majority of traditional light sources with non-recyclable contaminants harmful to the environment is not suitable for long-term use.
 

white LED lighting lamps mainstream trend

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In many cases, the LED higher efficiency can reduce power consumption by up to 88% They also greatly reduces carbon dioxide emissions caused by the lighting and power generation and transmission of electrical energy. The StrategiesUnlimited the co mpany s research, to 2012, total high-brightness white LED lighting market is expected to exceed 50 billion U.S. dollars, and corresponds to 28% in 2009-2012 compound annual growth rate (CAGR). This is just the beginning, because of the commercial / residential lighting market from incandescent, fluorescent and high pressure sodium, high-brightness white LED at the same time continue to accelerate the improvement of LED luminescence efficiency, led light bulbs for home from a commercial point of view, even become more has cost-effectiveness.

LED lighting can make the current global total energy consumption savings of up to 10% according to some calculations, the shift from traditional incandescent and fluorescent. To accelerate efforts to reduce carbon dioxide emissions from electricity generation, the global lighting energy demand is reduced by 10% of the potential This shift has played a gre at role.

What factors support such a huge potential for growth? First of all, this generation of LED luminous efficiency than incandescent, 10 times higher, is more than twice the fluorescent lamps and high pressure sodium (HPS), which greatly reduces the power to provide the required light output (lumens measure) necessary. With the further development of the LED, they rely on the power light-emitting efficiency will continue to improve, and is expected to double within the next few years.

Secondly, in a very environmentally conscious world, LED lighting does not require processing, contact and clear toxic mercury vapor in fluorescent lamps. Today, the cold cathode fluorescent lamp (CCFL) for most residential lighting systems containing up to 5mg of mercury, more lights contain mercury much more!

Third, the incandescent lamp every 1,000 hours need to be replaced, while the fluorescent sustainable use of up to 10,000 hours, compared to the li fe of LEDs over 100,000 hours. In most applications, this enables the LED to be permanently embedded into the final application being without the need for attachment.

Examples include indoor and outdoor commercial and residential lighting, such as street lights, indoor and outdoor industrial lighting, such as power plants and refineries, and other lighting in hazardous environments. 24 hours of uninterrupted operation of some applications (such as refineries), outdoor light fixtures will last up to 11 years, which means they will not require replacement. In addition, LED than several other types of lighting, small and flat-position can be manufactured to very flat form factor, so they can be permanently placed in the internal and external applications.

depth analysis of the LED lighting current situation

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1, heat


Poor heat of the LED is well known, will inevitably bring the wick life. The design of the existing garden led lights lights tend to heat difficult to meet t he requirements in the field of a heat dissipation is very demanding, but with very poor passive cooling, and is air-cooled, or even a closed air-cooled. As some lamps with plastic sleeve between the driver board and the aluminum heat sink to increase the reliability of insulation, irrigation cooling silicone to increase the cooling capacity. T8 lamp tube is closed, the wick can only rely on air convection heat transfer to the lamp on the back of the aluminum tubes for cooling. General, the internal temperature of these lamps will have seventy to eighty degrees. And if we take into account the heat, weight problems; take into account the weight, heat dissipation is difficult to guarantee, this dilemma of choice in the existing design, there is no feasible standard.


2, life expectancy


LED wick life was index decreased; electrolytic capacitor temperature is increased by ten degrees lower life expectancy in half; the MOS temperature, resistance increases, loss increases, the temperature will rise (constant current mode) with increasing temperature, and ultimately burned . Of course, the domestic manufacturers did not give a specific LED lamp life, and propaganda of the time just mentioned LED wick life of 100,000 hours LED life of bottlenecks in the system driver board LED wick is not damaged, the system drive has hung up.


Another LED light decay is very serious, so the life of the lamp should also consider the visual experience, after how long the brightness of the lamp to reduce the dark feel to the visual extent that life, and customers will consider the replacement of lamps, this life is that manufacturers do not have to come out (or there is no way to give), but it is very important.


Again, the majority of LED home lighting by size limits, protection is difficult to do well, in the voltage fluctuations, severe interference region, the existing low-power design is a test.


Most important, the life of the LED and the company s life is proportional to two years if the publicity 10 years of LED lamps bad six months ago, the company has closed down, the user will take the risk?


3, the weight


The screw interface lamps, fluorescent light weight of only one of the LED lamps, due to the heat sink, the weight of the fluorescent lamp holder who can be negligible, but the weight of the LED lamp holder is a very serious test, particularly the 7.8W spiral interface outdoor light fixtures lights, its weight is very dangerous, which is what businesses have to consider?


4, the price


The LED driver board in the temperature of 70 degrees may be a life of only five years (home), far from reaching 10 years of "concept" of the LED wick compared to the same brightness of the fluorescent, even fluorescent la mps for only one year life. 1W1 element of fluorescent lamps is much much more cost-effective than the 1W10 $ LED. Damage to the LED lamps are often the wick is not bad, have the entire lamp replacement. Calculate the tenth driver board have to discard the remaining nine tenths of the lamp (wick and the heat sink accounted for most of the cost of the entire lamp), if each vendor did not do a good job recycling customers do not like the product.


5, efficiency


Some people may be very strange, LED energy-saving products, why should consider the issue of efficiency? I mentioned here a PF value, a system efficiency. As the majority of the existing LED design are low power, cost pressure to the use of passive PFC (valley-fill), the PF may be up to 90, far less than the efficiency of active PFC easily 99 countries replaced with LED very close to the luminous efficiency of fluorescent lamps is a pressure.

LED lamps, safety and regulatory requirements

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 A low-voltage power supply, low power consumption: Generally speaking, the working voltage of the LED energy-saving lamps from 2 to 3.6V operating current is 0.02 to 0.03A This means: the power consumption is no more than 0.1W;

(2) the small size: the LED energy-saving lamp is basically a led ceiling lights chip is encapsulated in epoxy;


Long life: the life of up to 100,000 hours in the proper current and voltage, almost no maintenance. In addition, LED energy saving lamps full epoxy encapsulated, it is stronger than light bulbs and fluorescent tubes, light body and no loose parts, difficult to damage;


(4) high-brightness, low-calorie: general lighting with incandescent and halogen cheaper, but the luminous efficiency is low, in vain power consumption due to the thermal effects of light; LED lamps as lighting lamps, not only high luminous efficiency, and the cold The light source generates almost no heat consumption;


5 Environmental protection: LED lamps are made by non-toxic materials, unlike fluorescent lamps containing mercury can cause pollution, but also can be recycled;


6.LED energy-saving lamp with flicker-free, strong applicability, high stability, short response time characteristics;


As the LED technology and product attributes differ materially from those with traditional lamps, so the existing general lighting safety standards is clearly not applicable.


-Young Technology Certification Center (EBO) special write this article to explain the safety testing of the LED lamps requirements (for example) to UL standards.


(A) security specifications of LED lamps:


As technology improves, the use of LED lighting has been the past few decades, a simple application in the light, lights and other, and gradually use the phone backlighting, interior lighting, brake lights, LCD TV, laptop computer backlight and other auxiliary lighting ; and in the last two years, became the main lighting system, the scope of application covers, outdoor, commercial, and home products, res pectively:


Product Category (lighting)


Architectural garden lights, searchlights, step lights, balcony lights, etc.


Outdoor lights, column lights, etc.


Commercial advertising lighting, display cabinets, lighting, etc.


Home ceiling lamps, wall lamps, cabinet lights, floor lamp, table electrodeless lamp, etc.