Implemented by the Ministry of Finance Development and Reform Commission, Ministry of Science and semiconductor lighting products financial subsidies to promote the project, completed last week to open tender. This is after last year, the mainland released the second round of subsidies for the project tender. Docking held last Friday Jinya Electronics, 3E-LED products business to promote the conference a number of industry, government plays a vital role in promoting mains LED lights products.

 

In addition to the central government, local government support for the LED industry is sparing no effort. Binhai New Area, for example, released in 2011, the Binhai New Area to promote the development of new energy industry a number of measures to put forward, focusing on supporting the semiconductor lighting (LED) key equipment and materials and common key technologies R and D projects; support the implementation of the LED on campus in the region, the LED green community, LED industrial Park, mains LED lights traffic lighting demonstration project, each project in principle to give up more than 500,000 yuan (hereinafter referred to as yuan) interest subsidies or capital grants.

 

LED manufacturing and purchase of corporate policies are given subsidies for lower product prices will play an important role in the industrial workshop of a 24-hour lighting, as long as three years, the energy cost savings can cover the purchase of LED high bay lighting cost. “said Yu Ning, director of the Center of Tianjin Electric energy-saving technologies, a senior engineer.

 

According to statistics, benefit from the various government support, this year’s LED lighting products market will continue to maintain rapid growth. LED street lamp products, for example, China LED street lamp output this year will be an increase of more than 60% of the output value reached 4.7 billion yuan.

 

 

According to reports, Bandung Meeting Ocean through various forms of activities, spare no effort to promote the LED lights. In addition to the thousands of mains LED lights for household lighting are exhibited in the last year Bandung Hui Yang 20 LED manufacturers organized the first LED lighting exhibition, special provision of 5000 square meters of LED lighting area. This year, the occasion of the advent of “3.15”, hand in hand, Fengtai District, Beijing Consumers’ Association form of a forum to discuss the bright future of LED lights as well as how to change the life of people lighting. “Starting this year, the Bandung Hui Yang will store all public lighting to LED lighting, set an example by their own actions to help the concept of promotion of environmentally friendly energy consumption.” Bandung Hui Yang, general manager Song Xinxin.

 

It is understood that the LED high bay lights to become the new light source, the industry unanimously favored because of the multifaceted impact of the effect. Released last year, according to the National Development and Reform Commission and other relevant departments of the incandescent phase-out road map “, from October 1 this year will ban the import and sale of 100 watts and above general lighting incandescent, October 1, 2016 ban on the import and sales of 15 watts and above general lighting incandescent. Delisting of the incandescent lamps for energy-saving lamps and mains LED lights, is undoubtedly a big good news. To obsolete the incandescent light bulb, the white-hot battle between the energy-saving lamps and LED seems to see their own future development of fate. Energy-saving lamps are unable to degradation of toxic materials due to the production of materials is one of mercury, is not conducive to the ecological environment, and its LED lights, the latter showing more environmentally friendly, energy-saving advantages.

 

 

I do not want to and then the mains LED lights as a mysterious high-tech products to brag about how advanced scientific and technological content, how sophisticated technology to show that they, in fact, led high bay products is so simple, so simple that a soldering iron and can handle a screwdriver, which is the industry speculators can take advantage of one of the reasons most of our domestic entrepreneurs not from this kind of stage fortune? Industry mess things up so understandable, mess things up, but come to a certain stage, to a certain scale, it cannot then a soldering iron, a screwdriver to get the pattern of the product, otherwise there is a gap with the corporate image so on the machine, on staff, followed by business management to keep on our industry, business managers is precisely the lack of this, scale up, but management capabilities, but no matter sorted up some Tuba Lu suspects. Within the enterprise to engage in what 6S, the ISO, but companies tend to stay on the surface, to show people I have not seen or heard which an in-depth industry engaged in, to grasp its essence, encouraging the in fact the ability of corporate managers in the initial stage, they basically do not know, do not understand business, but also do not know which, enterprises how to locate, so managers have the heart to commissioned by a manager. but the overall fit the heart, determined to inadvertently restrict managers everywhere, so that managers cannot really serve the enterprise, and ultimately lead to the development of enterprises to a certain stage of stagnation or retrogression, the market climate subject to change, they will howling, trembling.

 

Some managers, Amoy to the pot of gold in the industry, it does not seem to know how high, how thick to act at the reach to the ceiling of funds, the blind expansion, as if the entire mains LED lights industry for its Domination here enclosure, where to invest, their already weak capital chain, tight about Bentu case of the volatility of the market slightly, so that sudden crack of capital chain, enterprises in order to sustain the final collapse. At present, our industries and enterprises which is not in the capital owed ​​to suppliers.

 

 

Many a variety of fallacious argument on this issue, it was said: the volt-ampere characteristic of the LED, the voltage is set, the current set. So the constant voltage and constant current effect is the same. Some people say that the constant voltage power supply mains LED lights in parallel should be used, and the LED constant current power supply should be used in series; Some people say that, because the mains LED lights constant current devices, so use constant current power supply; Some people say that using electricity supply should be a constant voltage power supply should be used when using battery power, constant current power supply. As for why such a request, it seems, who also did not understand.

 

So, what should be a constant voltage power supply, or a constant current power supply?

 

First look at the LED in the end is what kind of device. LED brightness is proportional to its forward current, and some of the LED structure determines its cooling power. Most LED will give the rated current, such as Φ5 20mA 1W 350mA … and so on, but that does not mean that the LED can only work in those rated current, but does not mean that the led high bay light is a constant current devices. For example, the Cree 1 watt LED and 3-watt LED is the same model, the current increased from 350mA to 700mA power from 1W to increase 3W, so the mains LED lights can be any value between 350-700mA.

 

 

Very early that there have been a constant current diode, this diode is not a cause for concern, because it’s just as the current standard for some instrumentation. However, recently led the industry to flourish, these diodes are suddenly aroused widespread interest. Many foreign companies have developed products for driving mains LED lights because the led high bay light must be the reason of the constant current source driven. Here we will be in-depth discussion of the properties and applications of the constant current diode.

 

The ideal constant current source is an internal resistance for the infinite devices, irrespective of the voltage across the value, the current flows through will never change. Of course, this device could not exist. Constant-current diode is equivalent to a certain operating voltage range (for example, 25-100V), its current is constant for a particular value (eg 20mA).

 

And high-voltage LED compared discrete low-power mains LED lights. As mentioned earlier, high-voltage LED integrated LED a low-power discrete LED series and high-voltage LED external characteristic. The advantages of discrete LED’s flexibility, users needed the series of any number of LED to get the volt-ampere characteristic. Series and parallel can also be more flexible features. Discrete LED’s emitting surface can adjust (increase) in a certain range, so that luminous uniform, reduce glare. Separation of the mains LED lights heat dissipation area is relatively large, easy to disperse the heat, to simplify the design of the radiator. The integrated high-voltage mains LED lights reduces packaging costs. Integrated high-voltage LED reduce.

 

 

 

Static electricity is a pernicious devil, the world countless electrostatic damage to electronic components, resulting in tens of millions of dollars in economic losses. So to prevent electrostatic damage to electronic components, is a very important task of the electronics industry, mains LED lights packaging, application of the enterprise do not take it lightly. Any link problems, will result in damage to the mains LED lights, the LED performance deterioration and even failure. We know that the human body static electricity (ESD) can reach about three kV, enough for the mains LED lights chip to breakdown damage in the LED packaging production line, the grounding resistance of various types of equipment to meet the requirements, it is also important, general requirements for the grounding resistance of 4 ohm, some of the occasions the grounding resistance even to achieve ≤ 2 ohms.

 

These requirements are for the electronics industry, people familiar with the key is in the actual implementation is in place, whether there is record. Not doing far as I understand private enterprise producing led high bay lights, anti-static measures in place, this is the most finding out grounding resistance test records, even if the ground resistance testing is also a once a year or a few years time, or have a problem check the grounding resistance, not knowing that the grounding resistance test is a very important task, at least four times a year (the test once each quarter), some of the requirements, the monthly for a ground resistance testing.

 

 

 

Soil resistivity changes with the seasons and different spring and summer days of rain, the soil wet ground resistance is easier to achieve, the dry soil moisture in autumn and winter, the grounding resistance is likely to exceed the prescribed value, for the record in order to save the raw data, so that future well documented. Compliance with ISO2000 quality management system. Test grounding resistance can design their own forms, ground resistance testing packaging companies, mains LED lights, enterprises have to do, as long as all kinds of device names to fill in the form, measure the grounding resistance of the device records documented test signatures can be archived.

 

Human body electrostatic damage to the mains LED lights is a lot of work should wear anti-static clothing, equipped with electrostatic rings and electrostatic ring should be grounded, there is a need to ground the static ring of anti-static effect is not good, it is recommended not to use the strap of the product, if the staff violation of rules, you should receive the appropriate warning education, but also played the role of the notices of others. Body with static electricity, wear different fabrics and clothes, and the people’s physique, autumn and winter night, we undress it is easy to see the clothes between the discharge phenomenon, and this electrostatic discharge voltage, there kV.

 

The silicon carbide substrate chip ESD only 1100 volts, the sapphire substrate chip ESD value is even lower, only 500-600 volts. A good chip or led high bay lights, if we hand-pick (the body without any protective measures), the results can imagine, chip or LED will be varying degrees of damage, and sometimes a good device through our hands inexplicable bad, this is the electrostatic blame.

 

 

Two different types of CFL lamps were installed in different locations of the hall. The divergence angle of the two fluorescent lamps are more than 110 °, while the Cree mains led lights is only 18 °. The optical density of the center beam of LED products is significantly larger than the fluorescent lamps is much higher, fluorescent 300, while the led high bay light to the 4465, which makes the LED lamps can be more light is concentrated in the local area.

 

Three lamp power and luminous efficiency are relatively similar, so the highlights of the Cree LED application is not on the energy-saving and high brightness. In fact, the Cree mains led lights lumen output is only a little more than half of 23W compact fluorescent lamps. It has the advantage that the beam in a small conical body, especially for local lighting. Cree LED lights will emit less light in the wide-angle region.

 

In short, the Cree mains led lights can increase the contrast of art and the surrounding wall, the color of the art look more distinctive. Table II a brief description of the different lamps caused by different light conditions. Art in the top of the wall, as opposed to 23W fluorescent lamps, Cree LED, the average vertical illumination reduces, it will be more light is concentrated in the surface of the artwork. Able to analyze the contrast on the CFL is only 0.5, while the LED lights to contrast 1.9, which greatly enhanced the art lighting effects.

 

 

However, in the discussion of the theory, usually about the PN junction refers to the ideal knot. In an ideal junction is not considering its bulk resistance. In the actual device, not only the memory of the PN junction region in resistance, the body region in a semiconductor material existence of resistance, resistance exist in the contact surface of the semiconductor material and the outer electrode, the electrode material for the existence of resistance, the electrode material and the outer lead exposure exists resistance, outer lead existence of resistance, and so, in fact, there are a lot of resistance. Voltage temperature characteristics of led high bay light is a positive function. The actual measurement of an LED VF not only is the PN junction barrier voltage EPN, but also includes the resistor voltage. This had an impact on the actual voltage – a function of temperature between.

Usually in the Test mains led lights voltage – temperature relationship in a static thermostat, give LED for into a transient current, and read the voltage value within a very short time. The purpose of this approach is to exclude the current the voltage drop across the resistor. Small current test results, does not reflect the voltage of the mains led lights in the normal current – temperature relationship. A large current, the parasitic resistance can not be ignored. Current increases, the higher the temperature the greater the voltage drop on the parasitic resistance. And the voltage on the parasitic resistance is a function of temperature, the voltage on the parasitic resistance with increasing temperature will be significantly offset by the PN junction voltage drop.

 

 

IMSResearch market the analyst JamieFox in the 2012 British International LED Exhibition (EuroLED) said, the market value of the high-brightness LEDs for general lighting applications reached a peak in 2017, then began to fall with the rapidly falling costs of technology . LED supplier’s “Golden Age” in 2013 to 2017. From 2018, the market is saturated, with the decline in LED prices and provide a long service life due to LED technology led lamp replacement rate, the general lighting applications in the field of mains LED lights market began to shrink.

 

Read the above passage is not someone in the emotion, the LED really difficult to do when the LED is harvest time for it? In fact, why do you look into the distance so far away the day? More should now work, how to find their own advantage in the current environment.

 

2013 to 2017, the first he is not the mains LED lights golden age. Many problems at present, perhaps not to solve these problems LEDs also may not be able to come in 2017. Vicious competition, of the cost of the LED industry, which makes the foul, in addition to the cost of outside, the light quality of LED lights is also an important factor to promote the wide range of LED applications (led street lights, led high bay lights), only the best chips only really suitable for general lighting applications. Worrying is that the lighting company Havells-Sylvania, a survey conducted last year found that the purchase of LED lights consumers, 85 percent are not satisfied with the luminous quality of light, and said they would not buy.