LED green light source looking forward to technological breakthroughs

July 29, "Chinese Academy of Engineering LED industrialization and application of international high-level seminar" held in Taiyuan, Shanxi. 11 Chinese Academy of Engineering academicians and more than 100 experts and scholars on LED industrialization and application in-depth discussion.

From concept to subject building

"In the past few years, China's LED heat, just the concept of heat, rather than innovation fever, research and development due to the lack of core technology and patents, low-level blind investment is serious.70% of China's enterprises can only dwelling in the lower threshold Low-tech package and assembly links, low-level competition with each other. "Chinese Academy of Engineering, said Lian Zhou Lian.

A few years ago, in China, some experts and scholars from R & D institutions and lighting companies are still just a "concept" for the development and industrialization of ultra-high brightness light-emitting diode epitaxial wafers and power chips and high-end semiconductor lighting. After all, it is the cutting-edge technology for 'green lighting' in the world.

Compared with the traditional lighting products, the invention has the advantages of low energy consumption, long service life and high luminous efficiency. The lamp has the advantages of no mercury and no flicker. The utility model has the advantages of energy conservation and environmental protection, lower energy consumption and longer life, and has the incomparable advantages of traditional lighting.

As a new generation of light sources, LED lighting will be one of the greatest inventions in the field of lighting after Edison invented incandescent light bulbs, director of the Chinese Academy of Sciences semiconductor lighting R & D center and director of the Nationally Experienced Semiconductor Lighting Joint Innovation Laboratory.

National Semiconductor Lighting Engineering R & D and Industry Alliance Secretary-General Wu Ling said precisely because of LED lighting many specific advantages, in June 2003, led by the National Science and Technology set up a "leading group of national semiconductor lighting project coordination," opened the domestic LED lighting industry The prelude. In early 2009, the Ministry of Science and Technology launched the pilot project of "10 cities and 10" semiconductor lighting application projects, setting off the climax of the development of domestic LED road lighting. In October 2009, in response to the progress of the domestic LED lighting development, the National Development and Reform Commission jointly with the Ministry of Housing and other six ministries introduced the "views of the development of LED lighting energy-saving industries," defined in 2015 China's LED lighting industry development goals. In February 2013, in order to guide the healthy and orderly development of semiconductor lighting energy-saving industry and promote energy conservation and emission reduction, the six ministries and commissions such as the National Development and Reform Commission formulated the "Semiconductor Lighting Energy-saving Industry Plan" and put forward the development goals and tasks for the energy-saving LED lighting industry by 2015 And measures.

Due to the support of the state policy, some domestic enterprises blindly expanded, but the core technology research and development has never been a breakthrough. According to Li Xuemin, the chief scientist of Veeco, a researcher at the Center for Semiconductor Products of the United States Caspian University, Professor Xu Heshe, vice chancellor of Taiyuan University of Technology, made a special trip to the United States to discuss LED core technology research and development. After returning to China, Dr. Xu Heshe, the recipient of National Outstanding Youth Fund, Of the new materials engineering and technology research center was established, the industry's top experts, famous enterprises and university researchers have joined to form the field of LED technology, the most professional and most comprehensive R & D team. Some well-known domestic universities, research institutes, have launched a LED research and development.

From discipline construction to intellectual property invention patents

Third-class companies selling coolies, second-rate business selling products, first-class business selling patents, super-standard selling business. Through years of painstaking research, China's LED industry and the application of the basic form.

Taiyuan University of Technology with core patents and integrated technology breakthrough, so that China's high-end system integration for lighting products, the main components are no longer dependent on imports, but also broke the foreign field of semiconductor lighting advanced technology and patents monopoly in the world semiconductor lighting industry to master The initiative. "High Brightness Blue and Green LED Epitaxial Wafer and Its Chip" have been recognized as key state-of-the-art products, LED, LD epitaxial wafers and chips and other key products by the 4 ministries and commissions in the country in 2004, reaching the international advanced level.

Wu Ling said that at present, China has applied for more than 50 patents in the field of LED lighting core technologies, solving the problems of short service life, severe glare, poor energy-saving effect, bulky appearance and high prices of LED lighting fixtures in the past. System integration technology as a breakthrough, to become the industry leader.

A patented technology, a grasp of brand services. "LED lighting industry chain is long, the key technical point, most companies can get ahead at some point, the advantage of domestic R & D institutions lies in the leading technical point, comprehensive technology, integrated technology living in the leading position in the country." In the study, the Chinese Academy of Engineering Academician Zhao Liancheng think.

At a time when most businesses are still confused, Taiyuan Polytechnic started exporting patents, technologies, management, branding and standards. At present, domestic R & D institutes have quietly opened their curtains and extended their expansion with the achievements of scientific research and transformation of patented technologies into productive forces, taking the form of technology shares and technical support.

At the seminar, Li Jinmin said that LED lighting is the most promising green lighting source in the 21st century. As a strategic emerging industry, LED lighting industry can drive the upgrading of traditional industries and attract wide attention from countries all over the world. Countries such as the United States and Europe And regions have one after another active implementation of semiconductor lighting development plan, stepping up the LED lighting industry layout.

From invention patents to LED industrialization

In February 2013, in order to guide the healthy and orderly development of semiconductor lighting energy-saving industry and promote energy conservation and emission reduction, the six ministries and commissions such as the National Development and Reform Commission formulated the "Semiconductor Lighting Energy-saving Industry Plan" and put forward the development goals and tasks for the energy-saving LED lighting industry by 2015 And measures.

Planning pointed out: LED energy-saving lighting industry an average annual increase of about 30% in 2015 reached 450 billion yuan. In addition, the plan clearly stated that by 2015, 60W incandescent lamps for general lighting will be phased out, the market share will fall below 10%, LED functional lighting market share of over 20%, LED LCD backlight, landscape lighting market Share reached 70% and 80% respectively. This will guide the healthy and orderly development of the semiconductor lighting industry and is also of great significance to the start-up of the semiconductor lighting market.

Zhou Lian academicians believe that under the promotion of the state and policy support, manufacturing costs of LED lighting products in China continue to decline, LED lighting market demand continues to expand, has formed a certain scale of the industry, but there are also many problems. First, the technical support for sustainable development is not enough, R & D support is insufficient and the power is dispersed; Second, industrial resources are not concentrated and the industrial structure urgently needs integration. Small and scattered enterprises, the concentration is not high, the distribution of industrial areas showed a decentralized trend, the lack of high-end products and leading talent; Third, the development environment needs to be optimized, the policy did not form a joint force, standards, testing and certification system to be improved; Fourth, the lack of Core technology patents, production and research cooperation loose. Although LED luminous efficiency continues to improve, but there are still low conversion efficiency of electro-optic light, poor thermal performance, warm white LED lighting, color rendering index and color temperature control difficult problems to be solved.

After new and old experts and scholars devoted themselves to research