First, the current development status of China's LED light source
In recent years, China's LED industry has developed rapidly. There are hundreds of thousands of people engaged in the industry, nearly 100 research institutes, and thousands of enterprises, including 62 LED chip manufacturers, distributed in 15 provinces. China will become the world's largest manufacturing supply, but it faces the survival of its own brands and technical support.
At present, the automation level of domestic LED packaging enterprises has increased rapidly, and the LED street lamp industry has achieved breakthrough development. Generally speaking, the competitiveness in the world is relatively weak, and the production capacity is not high. There are repeated investment, disorderly investment and vicious competition in the domestic LED industry. In addition, the current price of LED light source is still high, and domestic consumption is low, mainly for export.
This year, the domestic LED chip manufacturing equipment MOCVD (metal organic chemical vapor deposition), the demand has reached nearly one hundred, far exceeding the supply of MOCVD equipment manufacturers. Among them, Wuhu Sanan Optoelectronics invested 12 billion yuan in LED production base has been launched, the first phase of the purchase of 100 MOCVD equipment. Together with Anhui Dehao Runda, Foshan Nanhai's Xurui Optoelectronics and other enterprises, the number of MOCVD machines installed in China in 2010 will be between 100-150 units.
At present, Aixtron and Veeco two MOCVD equipment factories monopolize the global market share of the equipment by nearly 90%. The two annual production capacity is only about 150 units, and most of them are delivered to Korean LED manufacturers. The price of each MOCVD is 35 million yuan, and the gross profit margin is over 45%. Just as Chinese companies are still in the investment period of LED business loss, the profits of overseas MOCVD equipment manufacturers have been full.
Although LED light source has many advantages and has been widely used in many fields, it is a point source of compound semiconductor. Due to the quality of semiconductor chip, effective output of light, heat dissipation, packaging technology and drive circuit, the reliability of LED products, Consistency, luminous efficiency and longevity have practical effects, which require further research and resolution, and the current high price is still difficult for civilian use.
Second, the production of OLED solid state light source
Silicon semiconductors, transistors and large-scale integrated circuits invented in the last century have made great contributions to the electronics industry and have become the backbone of the information electronics industry and have played a decisive role in the development of the national economy. But the fragility of silicon and the cost and complexity of integrated circuit manufacturing have hampered its wider use. This has forced people to try to make plastic transistors, integrated circuits, thin film memories and other optoelectronic devices on plastic substrates that are truly inexpensive, ultra-thin, durable, non-breakable, bendable, and cut into any size device. This will be the second revolution in the semiconductor industry and will be the biggest highlight of the information electronics industry in the 21st century.
OLED organic light is an important branch of organic electronics. The large-scale, large-area production of inexpensive OLED light source coating machine not only plays an important role in solid-state light sources, but also can be promoted in conjunction with other organic electronics branches. .
Third, the biggest advantage of OLED white light relative to LED white light
1, OLED light source is a planar light source, the working voltage is very low, only 3-5 volts. It adjusts the light to any color, as well as the shade and intensity of the hue. Its color reproduction index is close to 100, which can imitate most white or sunny colors. Bright, low shadow, low operating voltage and comfortable white light can be as transparent as a window or as a mirror.
2, ultra-thin, light weight, soft, curlable, durable, short response time, wide operating temperature range, no noise and environmental protection. Compared with LEDs, there are fewer insert components, which can be mass produced and cheap.
3, OLED is a current-driven device, the brightness can be changed within the dynamic range of 10000 candela / m 2, and uniform illumination without dazzling. It has good color coordinates, high color reproduction index, and can adjust white light from cool to warm.
4, OLED can be deposited on any substrate: can be used as a substrate for glass, ceramics, metal, thin plastic plates and other compatible materials, and can be made into any shape and style, to fundamentally create a new lighting culture.
5, OLED light source has a long service life, due to the development and application of related material components structure, it is expected that the service life of white OLED lighting will be extended to about 700,000 hours.
Fourth, the application prospects of OLED solid-state light source
1. Plane lighting for residential and commercial buildings, or for museums or art exhibitions.
2, with OLED wallpaper can be made into a large billboard and sign board, the area can reach 200 square feet.
3, ultra-light wall-mounted OLED TV, touch screen or display.
4, the office wall or partition wall, can also be used as a flat panel light and computer display dual-use.
5. Color-changing panel lights for homes and offices, large-area wall and ceiling lights.
6, large-area LCD TV and display backlight, because the OLED itself is illuminated, so there is no need for light guides, diffuse reflectors and other components in the LED backlight system.
7, OLED lighting does not need to be made into complex and expensive lamps, can be used as a high-brightness, long-life shadowless lamp in medicine.
8. Get useful applications from programmable light intensity, light color, and beam direction performance.
9. Polymer sensors (including environmental sensors, fingerprint sensors, biosensors, gene detectors, chemical and industrial sensors, etc.).
10. Plastic medical and security devices, such as integrated circuit boards for X-ray detectors.
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