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Analysis for led lights for street lights trends in 2012

1) the heat of the lighting system

Commonly known as LED cold light source, led lights for street lights principle is issued a photon, electron after composite without the need for the hot process. However, due to the presence of Joule heat, the LED is illuminated at the same time accompanied by heat, but also for the occasions of high-power LED applications, the calories add up and cannot be underestimated, the led lights for street lights are different from the traditional incandescent, fluorescent and other lighting light source, the high temperature will shorten, or even termination of their service life.

2) to improve the color rendering

White LED widespread use of blue led lights for street lights superimposed excited by blue light, yellow light yttrium aluminum garnet (YAG) phosphor, the synthesis of white light. Because of its luminescence spectrum contains only blue, yellow, two spectrum, so there is a high color temperature, and low color rendering index, does not meet the general lighting requirements.

3) design of the lighting system of the second optical

Traditional lighting with incandescent, fluorescent light for a long time for a reference to determine the standard of optical and shape of the lamp, LED lighting system should be considered to get rid of the traditional lamp with led high bay module assembly, fully consider the optical properties for the The led lights for street lights source designed different lighting. The optical system design include the following several aspects: to determine the optical system according to the needs of lighting objects, luminous flux, the shape, the number of LED and the size of the power;

LED heat dissipation: Board level technology

Recent progress in TV, LCD, Cell-Phone, the PC (Notebook) and other portable use and living appliances and other electronic products, high performance, miniaturization, integration, Module, such as rapid. High-performance needs more energy consumption LED built-in electronic products, contrary to miniaturization and integration to the product of the size constraints.

Markets tend to improve the power LED package that can accommodate the design Maigin sharply reduce. Module of the heat issue is no longer simply a problem of the LED products, but the question of the overall System.

Heat within the LED heat dissipation package Chip effective management is not the product of electrical / optical characteristics of the problem, but as the impact of product life, reliability, manufacturing costs, and other elements. In particular, take the LED application products (led high bay), have different characteristics with the use of temperature, drive current power consumption rate of heat and light.

Hot if not well controlled power that occurs, it will make the products of the same specifications as the different light efficiency and directly lead to the competitiveness of their products. The high power consumption also has good heat dissipation structure of the product is the most competitive market of LED heat dissipation.

This column will be the Board level thermal cooling technology in the various elements to be resolved.

The concept and composition of the metal PCB, but it is necessary for LED heat dissipation technology.

The circuit on the main printed circuit board (Printed Circuit Board) is made of glass fiber and epoxy composite with insulating layer FR-4 board.

Mobile phone use high power led arrays

Mobile phone (Mobile), commonly known as mobile phones, Japan and Hong Kong and Taiwan, often referred to as mobile phones, flashlights, portable telephone, led high bay, early and Big Brother’s commonly known, can be used in a wider range of portable telephone terminal.Has been developed to 4G era
The worldwide use the most widely used is the so-called second-generation mobilephones, high power led arrays, CDMA GSM phones in Europe and the United States, in addition to Motorola’sIDEN network standard, Japan PDC. They are all digital formats, in addition to voice communication, high power led arrays, you can also send and receive SMS, Wireless Application Protocol. In mainland China and Taiwan is the most popular with GSM, CDMA mobile phones are also very popular. The whole industry is the migration process to the fourth generationmobile (4G). In addition to the typical phone features, the phone keypad part of the phonealso includes more features of the PDA, game consoles, MP3, camera, photography, sound recording, GPS, Internet access, there is a trend to the development of a PDAwith phone functions. The telephone Oral, led high bay ,ear bearing and microphone and earpiecemounted on a single handle. Formerly known as mobile phones, mobile, cellular phones,portable telephone terminal can be moved in a wide range.
Phone from a performance: smart high power led arrays, phone (smart phone) and non-smart phone (featurephone), smart phones in general better performance than non-smart phones, but non-smart phone than a smartphone stable. Most non-smart phones and smart phones, like the British company high power led arrays, ARM architecture CPU. But the frequency of the smart phone high,run fast. (For example: smart phones Motorola DROID X frequency up to 1000 MHz, theNokia N97 is clocked at 434 MHz), rather than the frequency of smart phones is relatively low, the speed is relatively slow. (Eg: Nokia 5000 clocked at 50 MHz, Motorola ZN300clocked at 171 MHz).

How the White LED lights to maintain a long life?

LED industry in the past in order to get the full white LED beam, once the development of large-size LED chips trying to take this way to achieve the desired goals. But, in fact, exert power white LED lasts for more than 1W beam but will decline in the luminous efficiency of 30% relative reduction of 20. In other words, if the brightness of the white LED is several times larger than the traditional White LED lights, the power consumption characteristics beyond fluorescent lights, then you need to overcome the following four topics: inhibit the temperature rise to ensure that the service life, improve the luminous efficiency, and Luminescence Properties of equalization.

Temperature rise solution to the problem is to reduce the package thermal impedance; to maintain the service life of White LED lights is to improve the chip shape, a small chip; improve the LED luminous efficiency of the method is to improve the chip architecture, small chip; The luminescence properties homogenization The method is to improve the led high bay packaging methods, these methods have been developed one after another.

Due to the increased power but will result in the package thermal impedance is sharply down to below 10K / W, foreign companies have developed high-temperature white LED, and an attempt to improve the problem. In practice, however, high-power White LED lights heat than low-power LED a few times more, and the temperature rise will make the light-emitting efficiency fell sharply. Packaging technology allows high-calorie, but the LED chip junction temperature there is likely to exceed the allowable value of the last industry finally realized that the heat dissipation problem is the fundamental method to solve the package.

Chinese decoding of led aquarium lighting in plant-lighting market

Traditional plant-lighting industry can be divided into two parts:

Plant Lighting: work as a complementary of sunlight, regulate the growth of agricultural products.

Aquarium Lighting: to promote the growth of aquatic plants, also play a role of ornamental.

With the improvement of people’s living standards, a large number of family are equipped with ornamental tub, led aquarium lighting should be more prosperous in plant lighting market in future.

There are two key points in plant lighting: The choice of light wavelength and light color collocation. Most of the plant light is a combination of red light (with a wavelength of 630-640nm) and Blue light (with a wavelength of 460-470nm). Plant light can be adjustable by adding other lights (yellow, orange light). These all depends on the properties of plants.

According to the results given by scientist’s experiments, red ray is a mainly stimulation of plants, blue-ray’s plays a role to promote the plants bear fruits. Non-flowering plants have a large demand of red light, such as cabbage. However, cucumber, tomato and other flowering plants needs more purple light. In some places, led high bay can be treated as a substitute.

LEDinside survey found that Chinese manufacturers of led aquarium lighting is not enough, most of them are concentrated in Shenzhen. LED plant lighting market is concentrated in countries and regions with underdeveloped agriculture due to lack of land, such as Japan, Korea, China and the United States, Europe.

Compared to the traditional plants lighting technology, LED plants lighting has two main advantages:

Energy conservation: can directly produce lights needed by plants with less power consumption;

Efficient: LED emits monochromatic light, can be manufactured particular light wavelength to meet the plants need, which cannot be realized by traditional lighting products.

LED lamps light encounter the North American bench

Although the LED gradually become the mainstream lighting tools, but at Christmas, there are still people insist on dotted with traditional incandescent lighting, consumer, LED lamps light flicker less than incandescent bright and light feeling cold, it is difficult to create a festive atmosphere. The Wall Street Journal reported that complain about the LED lamps light and a few. The people of Michigan in Grand Rapids O’Neal language mockingly said, a few days ago through a home improvement LED lights, people, the atmosphere like a hospital operating room is so warm, “she said, three years ago, also tried to change with LED lights, but the whole family to oppose, led high bay, and finally back to the incandescent; home in Houston, people Grove, vowed that he will not switch to LED lamps light, the only local firm sale of incandescent less he had the Internet to identify the supplier.
Yapu Si also acknowledged that the LED technology is not satisfactory that the use of LED lights for many years the Milwaukee people, she described his ranch with solar LED lights, only shine for several hours after nightfall, but during the day when the light big place, ironic. Ya Pusi these years LED lamp has been progress, and light than the first available when a lot of.
But there are also people say that using LED lamps light, this bulb is easy to use. People in Pa Bike in Geneva, Illinois, said this year’s Christmas lights with 100,000 bulbs with computer-controlled, can flashing with the song, which he described as 100 amps, the the incandescent average detachment bulb power consumption, LED lights are only 20amperes, led high bay, electricity has been a world of difference, and easy to use, just a switch can control all the lights. Itself from the body of the wind power industry Pa Bike recognize that better quality of own use of LED lamps light, also spent 10,000 yuan by the contractor responsible for engineering, not all people are able to afford such budget.
Lamp manufacturer explained that some people think LED lights can not create a festive atmosphere, because of the past, some cheap incandescent violet blue glow will be issued, but the new models of LED lamps light automatically flashes, more suitable to decorate the living room, the addition of light than diversification, both soft white, there are close to the traditional C9 incandescent light.
With these advantages, retailers also began tendency sales of LED lamps light, and Target, said the Christmas lights this year to sell 40% of the LED lights, this light after-market since 2005, increasing annual sales. The firm said, the long life of LED bulbs, and energy-saving and chief security, in general, the LED lamps light can operate for decades, then used as the Christmas lights can save 80% electricity, in addition to use a lot less wire when the bulb, burned fuse the risk is greatly reduced.

about High-Voltage LED

In the same output power, High-Voltage LED drive current is significantly lower than the low-voltage LED. Epistar high pressure blue 1WLED, for example, the forward voltage drop of up to 50V, that it is only 20mA drive current output power of 1W, led high bay, while the average forward voltage drop is 3V 1WLED need 350mA drive current to output 1W power dissipation of power by the same high-voltage LED output power at work is far lower than the low-voltage LED, which means that the cost of cooling the aluminum casing can be greatly reduced.
High-voltage LEDs can significantly reduce the AC-DC conversion efficiency loss. 10W output power, for example, if the forward voltage drop of 50V 1W high-voltage LED, the output can take two and four-string configuration, four series of LED forward voltage drop of 200V, that is just from the City power 220V alternating current (AC) bridge rectifier and drop 20V on it. However, if we adopt a forward voltage drop is 3V 1W low voltage LED, even if the forward voltage drop of 10 strung together, but 30V, that is to say from the 220VAC mains step-down to 30VDC. We know that the lower the pressure difference of the input and output AC to DC conversion efficiency is higher, can be seen such as the use of high pressure the LED, led high bay, the efficiency of the transformer can be greatly improved, thereby significantly reducing the power loss when the AC-DC converters, which a heat consumption to reduce but also to further reduce the cost of the cooling shell.
Therefore, if the high-voltage LED to develop LED general lighting products, the overall power consumption can be greatly reduced, thereby significantly reducing the design requirements of the thermal shell, such as we can use thinner, lighter aluminum casing can meet the cooling needs of the LED lamps an integral part of the cost of aluminum casing to reduce also means that effectively reduce the overall LED lighting costs due to the cost of the heat dissipating aluminum enclosure is the major cost of LED lighting.Thus, high voltage LED can bring to effectively reduce the cost and weight of LED lighting, but its significance is dramatically reducing the design requirements of the cooling system, which will effectively cleared the LED lighting indoor lighting markettechnical obstacles. Therefore, the high-voltage LED will dominate the future of LED general lighting market.
The continued enthusiasm of the LED voltage LED, also accompanied by an increase in high-voltage LED customers, contrast, low voltage LED chips are facing the danger of more and more difficult to sell into the LED general lighting market.
Compared to low-voltage LED, the more popular argument is that the high-voltage LED has two clear competitive advantages: First, in the same output power, high voltage LED drive current significantly lower than the low-voltage LED. Second, high-voltage LED can significantly reduce the AC-DC conversion efficiency losses.

Super contact lens fitted with t5 high bay lights

Are you always looking through your mobile phone from time to time, and to access to information? In the near future, perhaps this will become redundant: the scientists are developing a new type of contact lens technology, information can be directly mapped in the human retina, which can be absolutely Terminator level of cool.
Recently, an international team of engineers has successfully developed a prototype, which is a special design of contact lenses. The group attempts to contact lenses in the built-in t5 high bay lights made into a sapphire, and built into a receiving antenna (antenna), and use a circuit (IC) to connect the antenna and t5 high bay lights. Distance transmission, the group has been able to achieve control of each pixel on the t5 high bay lights. However, our eyes need to be observed objects As for a certain distance from the outside in order to effectively focus, in order to see the objects.
The engineers quickly identify the method to deal with this problem: the installation of an additional lens, in which they successfully achieved the focus of the image. Once the equipment package is successfully developed, the engineers will begin testing phase of work. The entire system has been developed and tested in the body of the rabbit, and ultimately successful, to prove that it is effective and safe. Once the device is successfully developed and put into use, it will almost have a similar function of the eyes of Schwarzenegger in the movie Terminator. Imagine, you will be able to read the text directly in the eyes, check your email, not to mention the impact of this technology will be to navigate drivers and the game industry.
Nevertheless, the development of this equipment is still in development stage, which still has many deficiencies and problems to be solved. Contact lenses, the lens is made of hard plastic texture, led high bay, so it can only wear a few minutes will have to removed, because it will hinder the circulation of air in the surface of the eye. And use the remote control device must be effective in the very near distance. The researchers said their distance from the final completion of the development may be at least 10 years long way to go, but they will be more than enough this time to address these problems. In addition to solve the problem of remote and focus, led high bay, they also hope to improve the use of the material of contact lenses, glasses to be more soft, wearing more comfortable.

New liquid- high power led gu10 bulbs

Today, all countries in encouraging businesses and people in energy conservation,California, USA Switch R & D of next-generation liquid high power led gu10 bulbs (above right) may play an important role in this regard. This new light bulb is speaking in terms of performance and service life, led high bay, far more than ordinary incandescent bulbs.

Not long ago, the Consumer Electronics Show held in Las Vegas, USA, have exhibited this new liquid high power led gu10 bulbs. Although its power is very small, but it can send the same brightness and 100-watt incandescent bulb. Switch the company’s head of Brett Shull Nova, praised this new, said: “It’s the biggest bright spot is than ordinary incandescent bulbs, energy saving 80%. For commercial applications, this light bulb there turn on investment period is expected to 6 months, so the merchant is replacing these bulbs are very cost-effective. ”

It is reported that this new type of liquid high power led gu10 bulbs will soon enter the market, expected to retail for 24 pounds (about 240 yuan), but it applies only to the U.S.120-volt power system. However, the Switch has said that before the end of 2012 is expected to design a can in the UK and other European countries to use liquid high power led gu10 bulbs. The Shull Nova, this bulb will be hot in the UK market, because the country’s current electricity price is about double that of the United States.

With the LED after another import indoor and outdoor lighting market, LED lighting prices have also dropped significantly, but the quality is poor also lead to many problems, it was noted around one after another set of LED lighting specifications, a number of mandatory lighting standard from 2012 onwards the road is expected to accelerate the vicious competition eliminated inferior, thereby bringing about the LED lighting market reshuffle effect.

LED industry will enter a peak development

Recently, a message that says “12th Five-Year” period, Guangdong Province unit GDP carbon dioxide emissions to achieve a decrease of 19.5% of the target To this end, from March 1, 2012, Guangdong Province, led high bay, the financial investment in building lighting projectand new planning and development area, always use the LED in the field of public lighting. There are many places start to implement the LED strategy. Governments are starting to implement policies to ban incandescent, LED layout lighting market in the next four years, the critical period.

After the collapse of the wave of micro-enterprises last year, this year in government energy subsidy policies to stimulate China’s LED industry, or usher in a new round of development opportunities. Opportunities, the business should be to grasp?LED market will really like the message above so booming? With the above problems, the reporter yesterday interviewed three photoelectric safety stakeholders in order to get the answer to that question.

Securities Daily: As the upper reaches of the LED industry leading enterprises, the three safety photoelectric when start the layout of the LED industry? This layout is formed?

3 An optical: in 1999, when “LED” term in China is still at the background to the study in only a few research institutions and research institutions involved in the face of the environment of the country’s industrial structure adjustment, the company focused on the future, and resolutely decided to adjust enterprise development strategies, the implementation of the industrial transformation and upgrading. Multilateral evaluation, and finally focusing its attention on the then Ministry of Science and Technology recommended “863” key issues – LED epitaxy and chip industrial base construction project, the layout of the high-tech optoelectronics industry. Faced with the acute problem of domestic LED industry, equipment, personnel, technology, safety and break through the difficulties, first settled in the Xiamen Special Economic Zone, is committed to developing the optoelectronics industry.

Currently, the company has become a domestic oldest, largest, best-quality full-color LED epitaxial, chip production base and the first third-generation high-powered photovoltaic concentrator products production company, is a national high-tech industrialization demonstration projects, the semiconductor The works of leading enterprises and national pilot innovative enterprises. 3 An optical vigorously the development of semiconductor lighting LED epitaxial chip, compound solar cells and other core business, while also actively expand the base of the upstream raw materials (sapphire substrate) to strengthen the strategic cooperation with downstream packaging and application enterprises, improve the industry chain the layout, the real development of the national high-tech enterprises, to create a world-class enterprise vision.

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作者：Blade