Analysis of Ultra-High Brightness LED Products-LED, Lighting, Lamps - Lighting Industry
Editor's note: as both sectors Energy Efficient and Green " LED "Technology has always been a great talent States LED Manufacturers have long-term focus of investment projects, aimed at nothing more than the pursuit of greater efficiency, and high brightness LED products. Looking at current trends and LED technology, the rapid development of high-brightness LED IR Line continued to expand the application of LED, with steadily growing general brightness LED visible light apart from the upper, middle and lower LED trends and performance, while showing a steady growth trend. However, there is good and bad quality of various manufacturers, low prices and strong R & D competition in the LED industry, manufacturers how to face competition and technology development, will become the light of the problem. This interview with Department of Materials Engineering, National Chung Hsing University, Professor, Dr. Wu Dongxing talk about trends and the current LED market applications in the campus laboratory research of new technologies.
LED technology development and market application of the many barriers yet to break through
 In many Semiconductor materials China, LED is only one of its main structure of the epitaxial present status and use of electricity directly into light energy of the same principle, within the positive and negative electrodes in the semiconductor 2 Terminal Applied voltage, when current is passed to promote hole and Electronic Combined, the other remaining energy in the form of light produced will be released, the energy level high and low photon energy to produce different wavelengths of light, so that the semiconductor create LED-based lighting industry chain.
The other hand, the next generation of lighting equipment and LAN light Communication Slow the formation of the application, LED will be circulated bound to a more dazzling light and prospects; This is because the tungsten filament in the general heat Bulb Or mercury fluorescent contrast, LED light with high luminous efficiency, long life, good power performance, even with low pollution and other advantages. Thus, a variety of lighting and display lighting market demand to expand, the scale effect, technical effect of such trends, the situation gradually LED manufacturers rush and a strong development into high-performance LED technology.
Although the maturity of white LED technology has developed to a stage, but... after all, single of the LED around the power is about 0.1W, luminous flux may be limited; in other words, many pieces must be LED through integrated to the "new generation of light" instead of Incandescent Source. Although, as indoor lighting Lighting The practical application of such cases, more or less there are applications on the market, but it is difficult to spread its high unit price of the promotion; Therefore, to meet the market expectations at a reasonable price, yet to wait for some time.
Therefore, LED lighting can continue to expand the market, the main problem is the brightness, patent monopoly over the use of features such as unit price is too high... the crux; Therefore, in the LED lighting within two years to complete replace interior lighting, its very difficult. However, the vast majority of LED manufacturers or unwilling to give up, continuing to try to enter other market-based special applications, such as: large-scale outdoor Monitor, Car lights, instrument panels, hand-held products backlighting, traffic signs... and many other information system applications, the cumulative strength and experience to continue strengthening the development of LED lighting technology, the future can expect to feature LED to play an extremely health club, to create something new out of lighting situation.
urgent struggle out of franchise development of the foreign manufacturers a unique power LED patent
Since the LED technology since the majority of ultra-high brightness LED patents held by most of Europe and the United States, Japan and other LED manufacturers hands, the technical level is not high in the Taiwanese manufacturers are cutting to avoid like the Skynet LED patent right, not most efficient use of technology, the technology and products but only in the low-class application market round and round, so, how to break this dilemma, Taiwan LED makers have become an urgent task. In the Chung Hsing University, Department of Materials Engineering Research Laboratory, is to introduce the concept of precision machinery manufacturing semiconductor manufacturing process to design their own equipment, combined with mirrors and low-temperature hot-type wafer adhesive technology, the success Make High reflectivity and heat dissipation of the new ultra-high brightness LED.
Process in terms of cost and complexity, but also competing over looks, lowered the cost of Japan and other countries, even in the product yield, energy efficiency, luminous efficiency and so on, are not inferior to the United States, Japan and LED products. Chung Hsing University, Department of Materials Engineering Laboratory is based on the new R & D technology, successfully developed more compared to traditional LED brightness, the price could continue to reduce the high performance LED, is expected to help Taiwan manufacturers to develop more international competition power LED products. In technology transfer, has been licensed to several manufacturers in Taiwan, the low cost, excellent quality LED new products have been sold to Japan, South Korea and China... and other Asian regions, popular concern about global optical manufacturers.
the importance of light and its key to success
Epitaxy with the rapid development in recent years under the high purity single crystal by choice of raw materials, then the appropriate temperature control and accurate grasp of the molecular size of the constituent elements of matching, has access to high quality double-heterostructure semiconductor or quantum well structure LED, can be different types of single crystal elements to build up layer by layer. Further discussion, that is, electro-optical conversion efficiency of the internal structure of the quantum efficiency (InternalQuantumEfficiency; IQE) has more than 90%; In addition, in the visible LED is based on the AlGaInP material selection for the largest, because of its lattice constant (latticeconstant ) and the GaAs substrate with excellent matching. But... as GaAs substrate bandgap is less than the energy gap of these materials, coupled with the LED light has shed light source is isotropic; Therefore, nearly 50% of the light source into the energy gap in the small GaAs substrate, they will be absorption or loss.
In addition, if the LED structure is not appropriate arrangements for the current distribution, their material will absorb the light, and from high refractive index semiconductor light source is passed to the periphery of the low refractive index of air (n = 1), most of the light will be reflected the impact of the real problem will occur in the LED external quantum efficiency (ExternalQuantumEfficiency; EQE) substantially reduced and may even lower to only a few percent remaining.
To meet these problems, and make light of the solution, developed by Dr. Wu Chung Hsing University, a high-brightness LED manufacturing technology, which is the combination of mirrors and the chip-adhesive technology as the main basis of the concept, with a a reflective mirror substrate, and then use the tools on their own R & D
LED technology development and market application of the many barriers yet to break through
 In many Semiconductor materials China, LED is only one of its main structure of the epitaxial present status and use of electricity directly into light energy of the same principle, within the positive and negative electrodes in the semiconductor 2 Terminal Applied voltage, when current is passed to promote hole and Electronic Combined, the other remaining energy in the form of light produced will be released, the energy level high and low photon energy to produce different wavelengths of light, so that the semiconductor create LED-based lighting industry chain.
The other hand, the next generation of lighting equipment and LAN light Communication Slow the formation of the application, LED will be circulated bound to a more dazzling light and prospects; This is because the tungsten filament in the general heat Bulb Or mercury fluorescent contrast, LED light with high luminous efficiency, long life, good power performance, even with low pollution and other advantages. Thus, a variety of lighting and display lighting market demand to expand, the scale effect, technical effect of such trends, the situation gradually LED manufacturers rush and a strong development into high-performance LED technology.
Although the maturity of white LED technology has developed to a stage, but... after all, single of the LED around the power is about 0.1W, luminous flux may be limited; in other words, many pieces must be LED through integrated to the "new generation of light" instead of Incandescent Source. Although, as indoor lighting Lighting The practical application of such cases, more or less there are applications on the market, but it is difficult to spread its high unit price of the promotion; Therefore, to meet the market expectations at a reasonable price, yet to wait for some time.
Therefore, LED lighting can continue to expand the market, the main problem is the brightness, patent monopoly over the use of features such as unit price is too high... the crux; Therefore, in the LED lighting within two years to complete replace interior lighting, its very difficult. However, the vast majority of LED manufacturers or unwilling to give up, continuing to try to enter other market-based special applications, such as: large-scale outdoor Monitor, Car lights, instrument panels, hand-held products backlighting, traffic signs... and many other information system applications, the cumulative strength and experience to continue strengthening the development of LED lighting technology, the future can expect to feature LED to play an extremely health club, to create something new out of lighting situation.
urgent struggle out of franchise development of the foreign manufacturers a unique power LED patent
Since the LED technology since the majority of ultra-high brightness LED patents held by most of Europe and the United States, Japan and other LED manufacturers hands, the technical level is not high in the Taiwanese manufacturers are cutting to avoid like the Skynet LED patent right, not most efficient use of technology, the technology and products but only in the low-class application market round and round, so, how to break this dilemma, Taiwan LED makers have become an urgent task. In the Chung Hsing University, Department of Materials Engineering Research Laboratory, is to introduce the concept of precision machinery manufacturing semiconductor manufacturing process to design their own equipment, combined with mirrors and low-temperature hot-type wafer adhesive technology, the success Make High reflectivity and heat dissipation of the new ultra-high brightness LED.
Process in terms of cost and complexity, but also competing over looks, lowered the cost of Japan and other countries, even in the product yield, energy efficiency, luminous efficiency and so on, are not inferior to the United States, Japan and LED products. Chung Hsing University, Department of Materials Engineering Laboratory is based on the new R & D technology, successfully developed more compared to traditional LED brightness, the price could continue to reduce the high performance LED, is expected to help Taiwan manufacturers to develop more international competition power LED products. In technology transfer, has been licensed to several manufacturers in Taiwan, the low cost, excellent quality LED new products have been sold to Japan, South Korea and China... and other Asian regions, popular concern about global optical manufacturers.
the importance of light and its key to success
Epitaxy with the rapid development in recent years under the high purity single crystal by choice of raw materials, then the appropriate temperature control and accurate grasp of the molecular size of the constituent elements of matching, has access to high quality double-heterostructure semiconductor or quantum well structure LED, can be different types of single crystal elements to build up layer by layer. Further discussion, that is, electro-optical conversion efficiency of the internal structure of the quantum efficiency (InternalQuantumEfficiency; IQE) has more than 90%; In addition, in the visible LED is based on the AlGaInP material selection for the largest, because of its lattice constant (latticeconstant ) and the GaAs substrate with excellent matching. But... as GaAs substrate bandgap is less than the energy gap of these materials, coupled with the LED light has shed light source is isotropic; Therefore, nearly 50% of the light source into the energy gap in the small GaAs substrate, they will be absorption or loss.
In addition, if the LED structure is not appropriate arrangements for the current distribution, their material will absorb the light, and from high refractive index semiconductor light source is passed to the periphery of the low refractive index of air (n = 1), most of the light will be reflected the impact of the real problem will occur in the LED external quantum efficiency (ExternalQuantumEfficiency; EQE) substantially reduced and may even lower to only a few percent remaining.
To meet these problems, and make light of the solution, developed by Dr. Wu Chung Hsing University, a high-brightness LED manufacturing technology, which is the combination of mirrors and the chip-adhesive technology as the main basis of the concept, with a a reflective mirror substrate, and then use the tools on their own R & D