月份：2012年6月

From a market point of view to observe the status of China’s led lighting supply industry

The only LED Lights packaging enterprises in the Chinese market has been very few. Most of the companies have to do packaging development and production of LED lighting products. LED application areas of business boundaries are increasingly blurred, and the enterprise led lighting supply product line becomes longer.

From a market point of view to observe the status of China's led lighting supply industry

From a market perspective, China LED companies have the following characteristics:

From the development status of today’s brand lamps, a very few of the current LED lamps are well-known to consumes. The lighting industry brand building is still in a lag. How to make  ‘well-known brands in the industry’ into ‘the public well-known brands, and how to develop our ‘ big but not strong brand ‘into a’ well-known lighting brands’ and how to make ‘brand’ developed ‘fine brand’. All are placed in front of our lighting business. And also it is in urgent need of resolving.

LED lighting industry is developing rapidly. 2010 led lighting supply starts to ferment, market demand for greatly increased compared with 2009, do the LED packaging. LED display enterprises also have to enter the field of LED lighting. Although the technological level of the LED products has been greatly improved compared to previous years. But most companies dominate the market price at the expense of the quality of the product. And also led to gradual decline in product margins. But a lot of companies began to increase R & D investment, high value-added, the product of intelligent direction. In the package and the application side, some of the products of individual enterprises and international led lighting supply manufacturers competing against. Even so, the profit of LED chip company is low. So the Led chip companies put a whole investment. The LED chip industry sales in 2009 of just over 20 billion yuan. and most of the LED chip companies with negative profit or no profit. LED chip companies amounted to 62 by the end of 2009. With the introduction of the technology of large-scale input of the LED chip companies and Taiwan,  it is expected that the LED chips in the next few years, China will have a very large development. Currently on the market there is little between the led lighting supply business merger situation, the basic expand the scale on its own.

Shanghai part of the subway platform first use of LED tubes

According to the Labor newspaper reported, Shanghai now has 380,000 street lights which are expected to gradually change the “core”. Reporter yesterday learned from the 2011, China International LED Industrial Technology Exhibition and Forum, Shanghai is making great efforts to build a “green light”, and gradually promote led tubes. Yan’an East Road Tunnel, Road Tunnel and part of the subway platform will be the first use.

Shanghai part of the subway platform first use of LED tubes

“Energy conservation is the greatest benefit of street lights upgraded and Li Shu-Chi, comprehensive assessment of manager of the Shanghai Semiconductor Lighting Engineering Research Center, said a high-pressure sodium lamp power of about 400W, and the same LED lights need only 150W, the city is currently 30 more than one million street lamp to statistics, the annual electricity savings are considerable. In addition, compared to traditional lights, led tubes lights have the advantages of energy saving, controlled, long life. “Traditional street lights suddenly bright flickered and very easy to reduce the lamp, LED lights without this concern. In addition, the traditional street lights, road surveillance cameras shoot may be a mass of black, once fitted with LED street lamp, the camera becomes very clear to the police for future investigation and convenient for evidence collection.

At present, Shanghai led tubes are still in a small scale pilot, the Yangtse River Tunnel Bridge Road and Wuning Road, and the road sections have been in use. Li Shuzhi says frankly, in practical use, researchers found, LED street lamp has light emitting efficiency needs to be improved, difficult to overcome the high temperature, dust pollution and other harsh environment, high cost.In addition, there is no standard interface leading to major manufacturers of all kinds of LED lighting products, hard to unify.

Li Shu-Chi said the 3 m of low-bar led tubes technology is approaching maturity, but the LED lights installed in an elevated have not found a “suitable targets”. Last year, Shanghai rail transit vehicles and platform height lighting system development and its large-scale applications”. Viaduct lighting research and development and application of “research projects, including R & D of LED tunnel lighting and street lamps, can achieve a light source. The average life expectancy of 50,000 hours.

Three development stages of decomposition of the replacement led lamps market

With the gradual development of LED lighting, lighting engineering auxiliary lighting and other public places, LED gradually replaced some of the traditional light source products. In 2009, the popularity of LED has entered the main lighting in the developed world. LED initially dominated by monochromatic light. Although the power is small, and price is high, yet it has the high reliability, strong control, small size, so the first emerging market electronic device indicator. The market for LED lighting products has been recognized and accepted. Other features of environmental protection, small size, high reliability of the LED lamps are increasingly prominent.

Three development stages of decomposition of the replacement led lamps market

In the high electricity commercial applications, replacement led lamps are rapidly becoming the new darling of the market. As the use of LED lighting, LED market development is divided into the following stage.

First, LED lamps replace the acceptance stage.

This phase is the early stages of development mainly luminous efficiency(energy consumption). Because the price was high, so at the stage, the main market is commercial lighting. The customer has an acceptable process, the first transition is habit and then appearance. The consistent use of traditional light sources, LED lighting reflects the energy saving, longevity and other features make the market easier to accept the relatively high prices. Especially in commercial situations. The fight by the various manufacturers is the quality and price advantage.

Secondly, LED lamps, utility model stage

On the basis of the previous stage, the market for replacement led lamps products has been recognized and accepted. Other features of environmental protection, small size, high reliability of the LED lamps are increasingly prominent. Thus developed a series of products which are completely different from the traditional light source and become very popular. The lighting industry will be a more open space for development. Light source is no longer only play a role in lighting, its changing bit by bit in making more appropriate for people’s working and living. The fight by the various manufacturers is to design application advantage.

Then, LED lighting intelligent control stage

LED lights industry will also be doing product design, providing total solutions to the course. With the development of things such as new technology, replacement led lamps, as the semiconductor industry, will also catch this tour high-speed train to play out its high control ability.

LED rgb rope light had become the mainstream trend of LED applications

Lighting will gradually become the mainstream application of LED. Lighting applications demand increase is the LED Lights market which has strong growth driving force. The supplier also aware of this tendency, and plans to increase capacity, the agency forecast 2011 global LED production capacity will reach 18 million, 2013 will reach 22.7 million.

LED rgb rope light had become the mainstream trend of LED applications

LED market demand continued to increase, but LED backlight demand gradually decreased, and began to transfer LED lighting applications. Since the fourth quarter of 2010, the first quarter of 2011 and early second, led rgb rope light back light market demand reduced, but we estimate the LED back light demand in the third quarter pick up and reached the highest level.

The overall LED market demand continues to increase, but the demand for LED   back lighting gradually reduced, and began to transfer towards LED lighting applications. The fourth quarter of 2010, early quarter and second, the LED back light TV inventory level was high and sales slow, LED back light market demand, thereby reducing, but we estimate the demand for led rgb rope light back lighting in the third quarter to rebound and reach the highest level.

At present, LED back light applications in all medium and small size LCD products, portable personal computer penetration of nearly 100%, LCD display and LCD TV’s permeability also continued to improve, but each required to reduce the number of LED package. In 2011 LED back light total demand is 4.59 million. Since 2010, LED back light LCD TV became the main application, the total demand of 50%, and they estimate in 2012, reached the highest;But as each LED package to reduce the number of required, expected 2013 TV LED back light demand will be slightly down.

On the Lighting applications, led rgb rope light average penetration in 2010 was 1.4 percent, which expected to reach 9.3% by 2014; They can replace the halogen lamp, LED spotlight applications with high penetration, government policies are also expected to accelerate the LED street light application. In the second quarter of 2011, LED lighting, the total revenue of  $ 3.2 billion is expected that in the third quarter will grow rapidly to $ 3.4 billion.

On the perspective of regional, Japan in 2011 is the world’s largest LED bulb market, the market share as high as 63%, but in 2014 will be reduced to  40%. As the awareness of power resources and energy-saving consciousness raising in Japan, LED lighting system of the high permeability, until 2014, it will be the largest lighting market.

LED production process issues should attach great importance

Currently, LED Lights used as garden lights, tunnel lights, and indoor places used in commercial lighting, office lighting, etc. They are highly desirable. With the advances in LED technology, lower prices at the same time, the phosphor price increases and cost pressures on the traditional lighting. These provide a good opportunity for the led production process to enter the field of interior lighting.

LED production process issues should attach great importance

However, few people concerned that the amount of radiation generated by the LED of each light point is not large, which is far less than the HID (high intensity discharge) light source, but it can make a very small energy concentrated in a certain direction. This also means that, although the LED unlike the laser that the light are strong, yet the local light intensity hazard should also be given special attention.

Insider pointed out that the LED Products are mostly on the sample stage, mainstream or traditional lighting products in the market, but the LED stage of the product will soon be  full arrival. Once the led production process enter into the product stage,  IEC / EN 62471 must be the mandatory implementation. The relevant testing laboratories should have the ability to match, otherwise photo biological safety hazards may occur.

Comment:

Indeed, Once LED enter into the interior lighting, security issues will become more prominent. If LED made of spotlights, table lamps, flashlights, laser lecture pen will cause the child’s interests. Its security has become more important. For example, a small laser lecture pen if exposed directly to the child’s eyes, it will damage the retina of the eye of the child. LED illumination radiation intensity of the harm is an objective reality, and is the most protective part.

Of course, the correct detection LED Flood lighting evaluation of the radiation intensity is very important and difficult. Even if the led production process module to achieve the
requirements of the lighting does not necessarily meet the requirements; lighting should also consider the light distribution, maximum intensity direction than the human eye is very easy to identify, we must seriously look for. These are not just domestic issues, but also the international detection in the field bottleneck.

LED is about to enter the home lighting on the occasion. I hope that the entire industry can be developed as soon as the correct means of detection, and specify a qualified laboratory testing, so in order to minimize the harm from the potential to radically.

Two elements that determine the direction of technological development of LED ligh bulbs

LED lights are the most energy-efficiency green power light source, natural lighting energy saving options, along with the gradual reduction of costs and prices of LED lights, its popularity is also accelerating. In 2020, the market share of LED ligh bulbs is over 50%. What is the influence and determination of led lamp technology development direction?

Two elements that determine the direction of technological development of LED ligh bulbs

Low down the cost of LED light

LED chip occupies the main part of the cost of LED lights, thereby reducing the cost of the LED is to reduce the cost of the LED chip.

The key for LED chip technology development lies in the base material and epitaxial growth techniques. Base material is by the traditional materials of sapphire, silicon and silicon carbide, the development of zinc oxide, gallium nitride and other materials. In a few short years, by means of a series of technical improvements, including chip architecture, surface roughening treatment and multiple quantum structure design, LED light bulbs achieved a great breakthrough on the Light effect.

Low cost silicon substrate technology continue to progress, but the luminous efficiency are still not satisfied, to maintain this pace of development, once they reach a higher level, the silicon substrate as the main technical program has become an inevitable choice. Businesses will also be huge economic returns.

Improving the luminous efficiency of LED lights

Improve the light efficiency can also improve the proportion of the effective light to start. Light thin-film chip technology can reduce the light output of each side of the loss, with the bottom of the reflecting surface of more than 97% of the light from the front output power conversion be mostly light, not only significantly improve the LED light bulbs luminous efficiency, a favorable conditions for the lens design. The thin-film chip technology is the core technology of super bright LED chip production.

Improving the color of the LED Tunnel lights

In the high-brightness white LED, a small portion of blue stokes shift of the longer wavelengths. This is a good thing, because it makes the LED light manufacturers that can use many different colors of the phosphor layer to extend the emission spectrum, effectively enhances LED color rendering index (CRI).

super high power led in low temperature

1, What is the low temperature lighting?
Low temperature lighting refers to the use of artificial light source to light, the ambient temperature below 5 ° C venues, such as refrigerators, freezers, refrigerators, cryogenic plants, outdoor lighting. The low-temperature lighting to fluorescent-based, and now the LED street light (super high power led) source in the low-temperature lighting place.

super high power led in low temperature
2, the fluorescent lamps used in low lighting
Although the fluorescent lamp in a conventional room temperature, the luminous efficiency up to 90lm / W regarded as a high-efficiency light source, but when entering the low illumination environment, whether it is the luminous efficiency, illumination or aesthetic design shows more disadvantages. Even though some manufacturers have introduced a dedicated low temperature fluorescent lamps, to solve the problem of the luminous efficiency, but still can not take into account the illumination and aesthetic requirements. And the price is very expensive. At low temperatures, ordinary fluorescent light-emitting efficiency and even to be halved, and life will be shortened. Even without considering the nonuniform illumination of fluorescent lamps at low temperatures, but also consider the fluorescent light color and color rendering the problem of inadequate, because it can not show the best colors of the goods, can not achieve the purpose of attracting consumers .

3, LED Products used in several major advantages of low temperature lighting
Compared to CCFL fluorescent lamp cold light source, LED  (super high power led) used in low temperature lighting, or has a special advantage. First, LED, even at low temperatures of minus 40 degrees Celsius, can achieve instant start and requires no special circuit or programming. LED luminous efficiency is almost unaffected in the low temperature and may even be better than the normal environment. The three LED is a point light source, with a small, point to the characteristics of the optical arrangement in accordance with the design requirements for refrigerated cabinets, display and other places. And the LED can provide sufficient uniform illumination better to see the product label. Fourth, the LED light color, color temperature, color rendering of the variability can be based on different lighting requirements for different products, select the appropriate LED light source, to achieve the purpose of attracting consumers. Is the difference between LED and CCFL power supply before CCFL must first after a buck DC / DC converter, it will wear out the 10% electricity, wear out 25% of electricity through the Inverter, and finally to Fluorescent tube of power about only 70%. But the LED Lights just after the LED  (super high power led)  Driver will be able to direct transmission of power, so that the efficiency of the transformer circuit to up to 90%, with a larger energy-saving advantage.

super led bulbs in led application

In order to solve the LED Lights heat dissipation problems, the future may be largely vertical structure of the LED structure, promote the technical development of the LED industry. I believe we all are heard, the following only from the technical surface are described, for information on the vertical structure of LED (super led bulbs) technology.

super led bulbs in led application

We know that the LED chip (super led bulbs) has two basic structure of the horizontal structure (Lateral) and the vertical structure (Vertical). The horizontal structure of the LED chip, the two electrodes on the same side of the LED chip, the current limit in the n-and p-type layer in the lateral flow, ranging from distance. The two electrodes of the vertical structure of the LED chips on both sides of the LED epitaxial layer, respectively, due to graphical electrode and the p-type cladding layer as the second electrode, the current almost all vertical flow through the LED epitaxial layer, very little lateral flow current can improve the current distribution of the planar structure the problem, improve the luminous efficiency can also solve P shading to enhance the LED light-emitting area.

 

We start to understand under the vertical structure of the LED manufacturing technology and the basic methods:

Manufacturing vertical structure LED chip technology, there are three main ways:
The growth of GaN films, the use of silicon carbide substrate, the advantage is in the same operating current conditions, the light fades, long life, the shortcomings of the silicon substrate absorbance.
Second, the use of chip bonding and peeling technology manufacturing. The advantage is that the light fades, long life, the deficiencies to be the surface of the LED in order to improve the luminous efficiency.
Is heterogeneous substrates such as silicon substrate GaN LED (super led bulbs)  epitaxial layer, the advantage of good heat dissipation and easy processing.

There are two basic ways: Peel the growth substrate, and stripped the growth substrate to create vertical structure LED chip. Which the growth of GaAs growth substrate on the vertical structure of GaP based LED chips have two structures:
Do not peel the conductive GaAs growth substrate: the stacked conductive DBR reflection layer on the conductive GaAs growth substrate, the growth of GaP based LED epitaxial layer on the reflective layer of conductive DBR.
Stripped GaAs growth substrate: Cascading reflective layer on the GaP based LED epitaxial layer bonded to a conductive support substrate, stripping the GaAs substrate. Conductive support substrate, the substrate of gallium arsenide, gallium phosphide substrate, the silicon substrate, metal and alloy.

In addition, the vertical GaN-based LED Grow Lights grown on silicon, there are two structures:
Stripped silicon growth substrates: metal reflective layer stacked on a conductive silicon growth substrate or conductive DBR reflection layer, the growth of GaN-based LED epitaxial layer on the reflective layer in the metal reflective layer or conductive DBR.
Stripping the silicon growth substrate: cascading metal reflective layer on the GaN-based LED epitaxial layer on the metal reflective layer bonded conductive support substrate, stripping the silicon growth substrate.
A brief description of manufacturing a vertical GaN-based LED process: reflective layer stacked on the reflective layer on the GaN-based LED epitaxial layer bonding the conductive support substrate, stripping the sapphire growth substrate. Conductive support substrate including metal and alloy substrate, the silicon substrate.

The GaP-based LEDs, GaN-based LED and ZnO-based LED of this type of through-hole vertical structure of LED compared to traditional structures LED has a large advantage, in particular in:
1, the vertical structure LEDs of all colors: red LED, green LED, blue LED and ultraviolet light the LED can be made through-hole vertical structure LEDs have great application market.
2, all of the manufacturing process in the chip (wafer) level.
3, no need to play the gold wire with the outside world power is linked through-hole vertical structure LED chip package thickness decreased. Therefore, can be used in the manufacture of ultra-thin devices, such as backlight.

supernova led grow light review in signal lights

LED STREET LIGHT (supernova led grow light review) is a field light source, its light-emitting principle is a PN junction with a positive voltage at both ends of Hole in the P region to the N region. As the minority carrier and majority carrier compound to release energy, part of the energy into heat, the other part of the energy into light.

supernova led grow light review in signal lights

LED Lights (supernova led grow light review)  luminous color in the matrix and the infiltration of miscellaneous materials, in addition to white light are basically pure monochromatic light, light color, easy to control, it can be widely used in traffic lights, hand signal lamp display screen and so on. Traditional railway handheld lights ordinary incandescent bulbs or inflatable incandescent light bulbs as a light source, a red signal, green signal, the yellow signal generated by the red, green, yellow polycarbonate filter, on the one hand, in the polycarbonate added to the molding process, the toner amount is difficult to accurately control, leading to the resulting color is not pure, on the other hand polycarbonate in the long-term use, in particular, will degrade in sunlight yellow, affect the color displayed. And incandescent bulbs are only a dozen hours of service life, change frequently, continuous working time of more than 10 hours not required, the lighting is also heavier to carry the inconvenience.

There are many manufacturers to use red, green, yellow LED signal light, but also there are some manufacturers use multiple ultra bright white LED as white light white light, however due to the low luminous efficiency, low power, enough illumination therefore only be used as a signal can not play the role of task lighting.

LED light  (supernova led grow light review) efficiency with incandescent similar, and increase the scope of the change in color, it has become the basis of the signal light source, while its short response time, low fever, low energy consumption and long life, maintenance costs and low advantage, immediately causes the LED signal lights have a wide range of applications. With the continuous improvement of the optical design, LED luminous efficiency will continue to improve, the number of signal lights use LED tube now down to 100 pieces from the beginning of the four or five hundred, or even dozens of stars.

 

suppliers of led lights with Solar lawn

Solar lawn lamp solar cells energy to carry out the work, when the daytime sunlight on the solar cell, light energy into electrical energy stored in the batteries from the battery at night, as the lawn of LED (light emitting diode ) to provide power. Its advantages for safety, energy, convenience, and environmental protection. Apply to the residential community green beautification lighting decorations, park lawn beautification embellishment.

suppliers of led lights with Solar lawn

LED solar lawn structure:

By the solar modules (photovoltaic panels), ultra-bright LED lights (suppliers of led lights), maintenance-free rechargeable battery, automatic control circuit, lamps and other components.

LED solar lawn lamp system consists of:
Solar lawn boost IC can automatically switch to charge and discharge behavior, when daytime solar charging panel sensor to the sun, the automatic switch to turn off the lights into the state of charge, when darkness fell, the solar charging panels induction less than the sun, and automatically switch open the light to enter the state of battery discharge. Solar lawn boost IC, the output voltage of 1.5 volt rechargeable battery up to 3.6 volts.

LED solar lawn light source advantages:

Most lawn use LED  (suppliers of led lights) as a light source, LED, long life, can reach more than 100,000 hours, low operating voltage, very suitable for application in solar lawn. LED technology has experienced a key breakthrough, and its properties in the past five years has greatly improved its cost performance has greatly improved. In addition, LED  (suppliers of led lights) low voltage DC power supply, the light source control costs low, so that adjustment of light and shade, and frequently switches are possible, and will not have a negative impact on the performance of the LED  (suppliers of led lights). You can also easily control the color, change the distribution of light to generate dynamic mirage, so it is especially suitable for solar lawn.

Unique advantages of solar lawn lamp, solar lawn light and power system design, have developed rapidly in recent years. Lawn small power, mainly decorative purposes, applicable to high mobility, circuit laying difficulty, high water requirements venue. These make many unprecedented advantages of solar powered lawn.