Two types of high brightness LED domestic growth rate of over 50%

LED AlGaInP red, orange and yellow LED and GaN based blue, green and purple, UV four binary systems and from blue (or purple, UV) chip and phosphor or by the combination of multi chip white LED and the two kinds of high brightness LED in recent years, domestic development is very rapid, growth rate of more than 50%. According to the statistics and analysis of China optical photonics Optoelectronics Industry Association Branch, in 2005 the country has a certain scale of LED production and research of approximately 400 units (excluding foreign-invested enterprises), small packaging enterprises and application product development company, has more than 1000. From LED raw materials, epitaxy, chip, packaging, application and related accessories, equipment, etc., has formed a relatively complete LED industry chain. The rapid development of epitaxial chip

The core technology of LED is the extension, chip manufacturing technology, especially the core technology of high brightness LED and power LED. Four yuan AlGaIn P red, orange, yellow LED and GaN based green blue and violet and ultraviolet LED, developed rapidly in recent years, the relevant government departments and related enterprises of University, and attach great importance to invest a lot of money, manpower to research, development and industrialization, major research institutions Peking University, Tsinghua University, Nanchang University, Institute of semiconductors, physics, electric 13, Southern China Normal University, Beijing University, Shenzhen University, Shandong University, Nanjing University, mainly to solve the GaN epitaxial growth layer, GaN based blue light wavelength drift and P ohmic contact on the silicon substrate in the technology, the ITO transparent electrode, laser stripping Al2O3 substrate and improve the internal quantum efficiency and light efficiency, improve the anti decay ability and power chip heat dissipation level and so on, has developed power LED 1W chip can also be industrialization, the luminous efficiency is 30lm/ W ~ 40lm /W, up to 47.5lm/W, a single device transmit power of 150mW, up to 189mW. Nanchang University in recent years to carry out GaN epitaxial materials grown on silicon substrate, the research results made breakthrough progress, recently passed the national "863" project acceptance, and received a number of independent property rights of international invention patents.

The main domestic enterprises LED epitaxial chip are: Xiamen, Dalian, Shenzhen three road beauty side, Shanghai blue, Shanghai Blaupunkt, Jiangxi LIAN, Shandong Huaguang, Nanchang Xin Lei, Shanghai Golden Bridge, Hebei Lide, Hebei morning, Shenzhen Orlund, Shenzhen department, Guangzhou century Jingyuan Puguang, Hangzhou scholar LAN Ming core, Yangzhou Huaxia integration, Gansu Xintian power company etc..

These enterprises have a lot of work in the development and improvement of technology in recent years, to improve product performance, yield, process repeatability, do a lot of work to improve the anti decay and reliability, has achieved good results, to protect the LED chip production. 2005 has produced about 18 billion LED chips, of which up to about 6000000000 high brightness chips, blue chips, only about 2000000000.

Small number of packaging enterprises

Domestic LED packaging enterprises are characterized by small size, quantity, according to preliminary statistics and estimates, the national LED has a certain scale of about 200 companies, it was estimated that a small package of more than 1000 companies. Its packaging LED device capacity of up to 30 billion / year, if the foreign investment enterprises, the packaging capacity of more than 50 billion / year, of which exports more than 10 billion.

The main packaging enterprises have Xiamen Hualian, Foshan nationstar, Jiangsu Wenrun, Huizhou, Shenzhen, Ningbo Huagang light quantum and spectrum, Jiangxi LIAN, Tianjin star, Langfang Segotep, Shenzhen Ruifeng, Shenzhen Lehman, Zhuhai lifine etc..

These enterprises have a certain product R & D strength, better packaging equipment, product yield, good quality. Domestic LED packaging companies can package a variety of LED products, such as LED display devices of various shapes and sizes, including single pipe, composite pipe, pixel tube, digital display, backlight, SMD-LED, micro LED, matrix display, special display, white LED, power LED and high-power LED module etc..

In recent years, the development of white LED and power LED packaging technology, a lot of the strength of the packaging enterprises have invested power research and development, such as in 13, Xiamen Hualian, Foshan, Shenzhen, China Star light quantum Huizhou first, and gradually solve the related technical problems, such as the package high light efficiency improve the substrate cooling performance, reduce the thermal resistance, white LED light uniformity, consistency, color temperature, color, anti decay ability, reliability and related problems such as white light test. At present, the power is 1W white LED, the optical efficiency of 40lm/W ~ 50lm/W, the thermal resistance is 10 /W.

Domestic LED packaging materials and accessories supporting capacity is also strong. In addition to the individual materials, the vast majority of materials are provided for the domestic, mainly gold, silicon aluminum wire, epoxy resin, organic glue, silver glue, conductive adhesive, bracket, strip and plastic packaging materials, tooling and fixture, has formed a certain scale of the industry chain.

Here it is necessary to introduce white LED packaging phosphor, domestic R & D and production enterprises have more than a dozen. The research unit of Beijing hospital, Zhongshan University, nonferrous chemical 100080, Changchun Physics Institute and other units, these units in recent years to carry out research to improve the yellow phosphor light excitation efficiency and anti attenuation performance, achieved very good results, while the development of red phosphor and UV excited phosphor three, to play a positive role to promote the domestic development of white LED.

Application gradually into the field of lighting

Because LED has not only three advantages, but also has the advantages of small size, low driving voltage, adjustable color, good performance and so on. With the increasing of LED luminous intensity, its application range is also