Recently, the 2013 LED Industry Innovation Development Symposium hosted by the Electronic Information Department of the Ministry of Industry and Information Technology, sponsored by China Semiconductor Lighting/LED Industry and Application Alliance and China Electronics News, was held in Beijing. The senior executives of mainstream enterprises in the domestic LED industry chain gathered together to discuss the problems faced by industrial innovation, the direction of innovation and the establishment and improvement of collaborative innovation mechanisms.
Ren Aiguang, Director of the Division of Integrated Circuits, Department of Electronics and Information Technology, Ministry of Industry and Information Technology, wants to benefit the entire industry with application companies to promote upstream packaging companies, chip companies, and materials companies to participate in collaborative innovation, and hope to bring the entire industry scale through application. .
At the end of last year, the Ministry of Industry and Information Technology formulated the LED industry development and innovation plan, including policies and funds for promoting industrial innovation and development, and applications in various fields, which have been implemented as internal documents. Our work has also been around this plan.
For the innovative development of the LED industry, we encourage joint innovation or collaborative innovation, the purpose is not only to benefit individual companies, but to benefit the entire industry. Therefore, in the innovation work in recent years, we have taken the lead in application enterprises to promote the participation of upstream packaging companies, chip companies and materials companies. It is hoped that the entire industry scale will be brought up by application and the current so-called stage will be resolved through application. Overcapacity problem. Only in this way can we achieve a win-win situation across the industry. This is also based on the goal of leading the chip manufacturing companies to drive innovation in the domestic equipment and materials industry.
At the same time, we encourage innovation, but also want to guide the low-end part of the production capacity to the high-end, and complete the adjustment of the industrial structure. This year, we have supported about 20 innovative projects with a total capital of about 200 million yuan. They have been publicized on the website of the Ministry of Finance, which means that the upstream and downstream of the industrial chain will be closely linked through joint innovation. However, in the specific work, whether this year's promotion focus is accurate and how to choose next year, it is necessary for the industry to make more recommendations. Many of the previous research conducted by the Alliance was also to promote this work.
For the comprehensive standardization of semiconductor lighting that we started to promote last year, because the LED industry is actually a cross-extension of many fields, including traditional lighting, electronics and many other aspects, the industry has always believed that LED related standards are not, very few or Very chaotic, the Ministry of Industry and Information Technology hopes to standardize the LED industry by perfecting standards. Including the previous support for the four test items, but also want to do some work through the post-test, further standardize the market, I hope the industry will give more comments and suggestions.
The primary task of the industry alliance is to serve the enterprises and industries. I hope that the industry will participate in the work of the alliance, make full use of the bridges and ties of the alliance, jointly explore the direction and mechanism of industrial innovation, and promote the healthy and sustainable development of China's LED industry.
Vice President of Nanchang University and Director of National Silicon-based LED Engineering Technology Research Center Jiang Fengyi is the key to innovation. The key to LED application is to avoid overloading the chip, work around a small current density, and use more chips to reduce power and heat dissipation. Demanding requirements.
At present, it seems that the profitability of domestic LED companies is worrying. Most enterprises are in a state of low profit, capital preservation and even loss. Although many good products emerge in an endless stream, there are also many low-grade and inferior products flooding the market. Therefore, although as an industry, reducing product costs and improving product quality is an eternal theme, for the current domestic LED industry, the first priority is not to reduce costs, but to improve quality. The price of LED products is already low enough, and industry development should curb low-price competition.
It is the eternal pursuit of LED companies to improve the color rendering level of LED products and make them close to sunlight. Today's LED white light is not saturated with sunlight and has poor color quality, which causes a series of problems in many applications. At the same time, in order to reduce costs and overload the chip, many companies have led to overall inefficiency and greatly affected the service life of the product.
In this context, for the LED lighting industry, it is recommended to add blue-green (490nm) LEDs and red LEDs to the existing blue LED plus phosphors to make the spectrum close to sunlight and improve color quality (including space). Consistency), improve the color rendering index. Specifically, it is necessary to develop a reverse polarity red LED chip and a blue-green light 490nm chip suitable for illumination, and reduce the operating current density, and use a chip, and try to use a series and small current medium voltage operation (except for special illumination). . In this way, it is necessary to jointly innovate in various fields of extension, chip, package, and application.
For the LED display industry, it is recommended to develop and apply reverse polarity LED chips, reduce operating current density, improve luminous efficiency, improve reliability, and make the display more energy efficient. The application of reverse polarity red LED can greatly improve the luminous efficiency. The reduction of the operating current density of the red LED can significantly improve the reliability, and the green LED can reduce the operating current density and significantly improve the luminous efficiency. At the same time, high-quality LED displays with monochrome screens of various colors and multiple combined two-color screens can be developed. Obviously, these innovations are also inseparable from the close cooperation between the upper and middle reaches.
In short, the key to industrial chain joint innovation to promote LED applications is to avoid overloading the chip, work around a small current density, properly use the chip, reduce the stringent requirements for power supply and heat dissipation, and keep the total manufacturing cost unchanged or unchanged. On a large basis, further improve the luminous efficiency and reliability of LED application products. In addition, work on MOCVD equipment and processes to improve the localization of MOCVD and key consumables.
China's optical optoelectronics industry association vice chairman Guan Jizhen display innovation and expansion of application space With the continuous improvement of China's microelectronic assembly technology, the indoor LED display pixel center distance has entered the 1.Xmm era.
In the innovation of market application, the creative market, the small dot product market, and the advertising media market have become the mainstream; in the field of professional service innovation, the control board and professional engineering services have become the highlights; in the marketing model innovation, the emergence of foreign trade Sales-oriented export-oriented marketing, terminal project sales-oriented terminal marketing, nationwide establishment of distributors and distributors of channel marketing, R&D and production division of labor OEMODM marketing, focus on specific market-based professional marketing, and BT and BOT marketing, etc. Multiple modes.
Judging from the overall technological innovation, some key enterprises have actively undertaken various scientific and technological projects, and have received support from the National Development and Reform Commission for energy conservation projects and industrialization projects. The overall technical innovation direction of the industry is mainly focused on large-screen control, high-density display new product development, special project heterosexual engineering design, LED display application expansion products, and product reliability and energy saving. In the field of traditional LED display, the key technologies of various indoor and outdoor LED display screens are basically mature, and the whole machine is continuously improved and perfected in terms of reliability and process level, forming a standardized series of products. Full-color indoor and outdoor display screens are widely used, and outdoor high-definition full-color surface mount technology products are maturing.
In terms of LED chips, the luminous intensity and luminous efficiency continue to rise, the reverse leakage current is better controlled, and the antistatic ability is further enhanced. The electrostatic damage problem that has long plagued the LED display has been solved; in the LED packaging, the process, The material continues to improve, the performance of LED devices continues to increase, the LED packaging method expands, and the pixel center distance of indoor display screens continues to shrink. The outdoor display LED package gradually transitions from the straight-inserted light mode to the surface-mounting mode. The fusion of the two package modes is a lens. The surface-mount LED has also sprouted.
In terms of switching power supply, power factor active compensation (PFC) has been gradually applied. Synchronous rectification technology (SR) using high conversion efficiency in switching power supply has also been recognized by some display manufacturers and customers; China's Taiwan accumulation, the United States TI, etc. have successively launched low-voltage drop energy-saving drive chips, support time-sharing multi-tasking scan driver chips, pre-charge FET-type driver chips that can reduce ghosting, and many other products, greatly improving the visual display Performance and expand the application prospects of the display.
In terms of control technology, the level of grayscale processing continues to increase, and 19-bit products have entered engineering applications; bright lines and darkness caused by poor mechanical assembly can be achieved through brightness uniformity correction, module uniformity correction, and point-by-point uniformity correction techniques. The line is visually corrected; with the improvement of the running speed of the semiconductor driver chip and the continuous improvement of the driving refresh mode, the LED display can realize no flicker, no retrace line and no water ripple under the camera.
With the continuous improvement of the overall level of microelectronic assembly technology in China, the pixel center distance of high-density indoor LED display has also made breakthroughs. The pixel center distance of indoor LED display has entered the 1.Xmm era. In the next few years, it is possible to replace the projection wall as the mainstream display medium for the large screen of the monitoring center. In outdoor applications, 10mm has long been the fascination of the pixel center distance of outdoor full color screens. Along with the improvement of outdoor surface mount LED packaging technology and the improvement of outdoor module protection level, the limit of pixel center distance of outdoor full color screen is also constantly refreshed. The outdoor full color large screen with 5.Xmm pixel center distance has been applied in the market. . Changes in product form pose challenges to the original module and module concept, and the industry may need to reposition concepts such as pixel and density in the future.
BOYON Optoelectronics Technology Co., Ltd. General Manager of the Lighting Division Hou Yan backlight innovation faces the challenge of thin and light. In terms of the development trend of LED backlights, backlight companies are required to increase their brightness while designing products to be lighter and thinner.
The backlight is one of the important components of the TFT-LCD. It is an optical component that provides the backlight of the liquid crystal display product. Its function is to convert the point source or line source into a uniform surface light source. In the next few years, the application of backlights in markets such as mobile terminals and televisions will continue to grow. At present, in the notebook market, traditional CCFL backlights are almost completely replaced by LED backlights; in the large-size desktop display and TV market, LED backlights are expected to completely replace CCFL backlights in 2014.
As far as the development trend of LED backlights is concerned, for mobile phones, a series of market demands such as large screens, strong touch signals, wide viewing angles, and high resolution require backlight companies to make their product designs lighter and thinner. Increase its brightness. With the recent emergence of 19201080 resolution products, the thickness of LED backlight modules has dropped from 1.75mm and 1.3mm in 2012 to less than 1mm, and the backlight thickness has been controlled to about 0.5mm. On this basis, narrow-frame and borderless mobile phones put forward higher requirements for the innovation of LED backlight products and their packaging processes.
For notebook computers, the module thickness and weight of LED backlights in 2012 are 15mm and 1.4kg respectively. This year has reached 13.5mm and 1.2kg, and will reach 12mm and 1kg next year. In order to compete with the tablet computer, the notebook computer should introduce more new elements while pursuing more ultra-thin and energy-saving, which poses a greater challenge to the LED backlight. The thinning of glass is approaching the limit. How can we innovate and break through the backlight structure?
Let's take a look at the application of LED backlights on TV. The backlight design of a TV usually requires a trade-off between cost, thickness, and brightness, while the three types of designs, side-lit, direct-lit, and low-cost, have advantages and disadvantages. In terms of the way of entering the light, as the price of LEDs drops sharply, the driving factor for reducing the number of LEDs is weakening. At the same time, due to the quality risks caused by heat dissipation, only a limited number of models currently use a single-sided LED structure.
The emergence of 4K TV also brings new opportunities and challenges to LED backlights. Because the panel ppi of 4K TV is 1 times higher than FHD, the brightness of 4K TV LED backlight is increased by 1.5~2 times under the premise of the brightness of the module. The number of LEDs in a single 50-inch 4K TV direct-lit backlight is also Will reach 88 to 112.
Intermediates refer to semi-finished products, which are intermediate products in the production of some products. For example, if you want to produce a product, you can produce it from the intermediate to save cost. Pharmaceutical production needs a large number of special chemicals, most of which were produced by the pharmaceutical industry itself. However, with the deepening of social division of labor and the progress of production technology, the pharmaceutical industry has transferred some pharmaceutical intermediates to chemical enterprises for production. Pharmaceutical intermediates are fine chemical products. The production of pharmaceutical intermediates has become a major industry in the international chemical industry.
Pharmaceutical Intermediate,Syntheses Intermediates,Organic Pharmaceutical Intermediate
Yucheng Jinhe Industrial Co.,Ltd , https://www.speciatyelement.com