"OS" and "RAM" are shorthand for German and tungsten in the German language. Tantalum and tungsten are two kinds of metal materials for making incandescent filaments 100 years ago. This also shows the rich history of OSRAM. Osram's history of development fits in a sense to the history of lighting, from incandescent lamps in general lighting to energy-saving lamps to LED replacement lamps, HID headlights for automotive electronics to LED headlamps, and OSRAM's innovative innovations The philosophy has always been to lead the development of the lighting industry. How does OSRAM evaluate the development prospects of LED and OLED lighting technologies? What are the constraints? How do they solve the heat problem? How to lay out the Chinese market? During the 6th China International Semiconductor Lighting Exhibition and Forum (CHINASSL2009), China Semiconductor Lighting Network had the opportunity to interview Dr. Alfred Felder, President and CEO of OSRAM Opto Semiconductors Asia Pacific.
Dr. Alfred Felder, President and CEO, OSRAM Opto Semiconductors Asia Pacific
Multi-domain application common development
According to incomplete statistics, since May this year, OSRAM Opto Semiconductors has developed an "easy-to-use" LED solution designed for street lighting, RGBMultiChipLED for large full-color screens, IRLED for CCTV and night vision systems. Products, micro projectors use OSTARCompact and OSTARPowerProjection two LEDs, as well as a variety of products such as OSLONMXECELED and OSLONSXECELED for medium-sized cars, covering general lighting, display, projectors and automotive electronics.
Dr. Fang De said that the market has decided on the research and development direction of OSRAM Opto Semiconductors. Obviously, the application fields for connecting with LEDs are very broad, and LEDs have performed well in these fields. “At present, OSRAM LED products cover automotive lighting, consumer electronics (such as pico projectors and mobile phone flashlights) and LCD backlighting, and will focus on the development of LED/OLED in the field of general lighting in the future.â€
LED enters the bottleneck in the field of general lighting
LEDs have made rapid progress in luminous efficiency indicators. At present, the luminous efficiency of international large-scale LED mass production products has reached 100lm/W, and the target for next year is 120lm/W. This value was only 40 lm/W four years ago, 60 lm/W two years ago, and 80 lm/W last year. The advancement of LEDs in luminous efficiency has increased the advantages of LEDs in energy saving.
In addition, the gradual breakthrough in LED key technologies has continued to enhance the industry's confidence in the future performance of LEDs.
For LEDs entering the field of general lighting, experts believe that it is only a matter of time. At present, there seems to be only one constraint, that is, cost. "In terms of cost, LED and traditional lighting sources are very different. From the consumer's intuitive experience, the current price of LED lamps is at least five times that of traditional light sources, which will directly affect consumers' desire to purchase."
But another advantage of LED is life, and then the overall cost of LED is not expensive, taking into account various expenses such as maintenance costs and electricity savings. “All those who really understand the characteristics of LEDs understand this. The key to the problem is how to make it known to all consumers. Promotion and promotion are very important. I know that the Chinese government has done a lot of work in this area. The market is very beneficial." "In addition, for chip makers, brightness, reliability, heat dissipation and other issues are also the key to avoiding." The quality of products is very important for the establishment of consumer confidence, and will restrict the degree of industrial promotion. .
Core issues in chip design and packaging
"From a chip perspective, the focus of future development is to focus on luminous efficiency, and second, to consider the innovative development of the chip in design and packaging." Luminous efficiency has been mentioned above, the technical development of chip design and packaging, It is the key to restricting the quality and stability of LED products.
Taking heat dissipation as an example, chip makers are not as concerned about heat dissipation as street lamp manufacturers. “But in fact, OSRAM Opto Semiconductors has its own unique solutions for heat dissipation. For example, in the LED packaging, OSRAM uses ceramic substrates to solve the heat dissipation problem. In addition, from the electrode distribution, the chip is optimized from the design source. These are all part of our system cooling solution."
LED street lamps have strict requirements for heat dissipation. Dr. Fang De said that OSRAM Opto Semiconductors has won a number of tunnel and road lighting orders in China. The customers mainly valued OSRAM's outstanding performance in heat dissipation technology. One example is the Shanghai Yangtze River Tunnel, which was opened to traffic a few days ago. The light source of its 5,886 tunnel lights is based on the OSRAM Golden DRAGONPlus LED.
"As for the package form, it should be considered in combination with the application. For example, the projector is used for RGB multi-chip structure."
At present, China has already had many strong competitors, but Osram has formed its own unique advantages in its own growth process. It has extensive expertise in technology research and development, chip production, chip packaging and other fields, as well as many patented technologies. Excellent product performance, strong research and development, and various factors form the core competitiveness of OSRAM.
OLED and LED are complementary
The development of LED has just entered the formal, and the pace of OLED research and development will follow. Based on the advantages of OLED in terms of reliance on carrier materials, many people have proposed "OLED threat theory."
"We believe that OLED and LED are complementary, each has its own application and advantages. Osram is very concerned about these two technologies and has increased research and development. We believe that the development of both is a matter of time. At present, LED has Step into mass production, start multi-application, technology development is changing with each passing day; OLED's current light effect is only about one-third of LED, about 30lm/w, there are still some problems in life and reliability, still can't live in real life. Medium to large scale applications. But we believe that over time, OLED technology will mature."
In addition, Dr. Fang De said that LEDs are point sources and OLEDs are surface sources, both of which can be used in different locations. Out of the limitations of the carrier material, OLEDs can be fabricated into a variety of shapes that are seamlessly integrated into the design environment and will only be detected when the power is turned on. OLEDs are flexible materials that can be curled to save space or carry. “Future OLED light sources are expected to be integrated into room screens and furniture. For example, the entire window is made of OLED, which can be naturally lit during the day and shines at night.â€
These ideas must be based on OLED large-size technology to enter the mass production stage. At present, OLED is still in the laboratory research and development level, but "technology development is so fast, nothing can not be expected 1
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