Peking University School of Information Science and Technology Microelectronics Professor Guan Xudong pointed out that to prevent the possibility of LCD display by other display technology, but also to strengthen forward-looking technology research and development, attention to non-liquid crystal display technology. So, which one is the most worthy of the future layout of China's display technology?
OLED technology has been the national key support
In the past two years, the big screen has become the trend of the development of the TV market, the current domestic 55-inch color TV has become the mainstream size, but also to 65 inches above the market forward. According to forecasts, 2018 65-inch LCD TV may account for about 8.7% of the entire TV market, and by 2020, 70-inch LCD TV will account for up to 10%.
The face of television products large size of the outlet, the global panel enterprises competing layout ultra-high generation of LCD panel production line (10 generations and above). In the BOE and Huaxing photoelectric investment in the construction of two more than 10 generations of panel production line, Foxconn, LGD, Huike, CEC and other enterprises have begun to layout ultra-high generation of LCD panel production line. According to statistics, the world or there will be 8 more than 10 generations of LCD panel production line on the agenda.
Compared with the LCD panel production line, although the domestic high-generation OLED production line is still in a vacant state, but the domestic panel manufacturers have already started research and development of printed OLED technology. TCL Research Institute senior consultant Zhu Changchang explained, with the evaporation process to do small size OLED good, but to do large-size OLED yield is relatively low, the price is too high, Samsung has given up. And use the printing process to do OLED can reduce costs. So early in 2012, TCL Group Vice President and Research Institute Yan Xiaolin in the country first proposed, printing display is a breakthrough in large-size OLED display technology bottleneck is an important direction.
In 2014, the Guangdong Provincial Science and Technology Department approved the establishment of the industry giants as the core, supplemented by the top intellectual resources in Guangdong Province, Guangdong Province, printing and display technology innovation alliance, and then set up a printed OLED display technology public R & D open platform, and the establishment of Guangdong Polyhua printing Display Technology Limited.
And China in the "thirteen five" national key research and development program has been the development of printed OLED technology as one of the key support projects, the draft of the new national materials in the major projects have also included in the printing OLED technology.
In 2016, Guangdong Polyhua Printing and Display Technology Co., Ltd. (TCL's Huaxing Optoelectronics Co., Ltd., Tianma Microelectronics Co., Ltd. jointly funded) and the United States DuPont, Japan Sumitomo Chemical, Nissan Chemical and the United States and other companies signed a strategic cooperation agreement, Will support Polyhua in the printing of OLED technology in the development of materials and process requirements, tailor-made for the relevant research and development equipment.
Zhu Changchang pointed out that Huaxing Optoelectronics, Guangzhou New Vision Optoelectronics and Fuzhou University joint research printing OLED, has made 31-inch FHD printed OLED samples. Now Polyhua in Guangzhou Science City plant has been covered, is entering the equipment commissioning stage, about the end of August test line can get through.
China's laser display technology and foreign comparable
Whether it is printing OLED technology research and development, or high-generation LCD panel production line investment, mainly to the upstream panel manufacturers, while the laser display layout is based on downstream machine manufacturers.
In recent two or three years, the laser TV into the development of fast lane, in addition to Hisense, Changhong and other color TV brand to speed up the layout, the millet, Sony, see still, whale, etc. are also actively layout laser TV.
Xu Lixin, a professor of physics at the University of Science and Technology of China, said in an interview that China's laser display technology is comparable to that of foreign countries. Foreign in the drive chip, semiconductor light source on the development of more forward, and China in the optical engine, eliminate speckle, light efficiency technology has certain advantages.
According to the reporter to understand, Hisense laser optical engine 100% independent research and development design, 70% of the machine cost in their own hands. Changhong also in the laser TV industry chain to speed up the layout. June 15, Changhong built annual capacity of 150,000 sets of laser light machine, host integrated standard laser display production line, accelerate the development of Changhong laser display industry. And now the industry is accelerating the development of full-color laser projection technology, through the use of narrow-spectrum red, green and blue three-color laser to synthesize white, in the true sense of the laser "full color" display. In this case, our manufacturers are actively promoting the "full color" laser display technology applications, it is revealed that next year Hisense will launch full-color laser TV.
Micro LED two or three years of concern
In addition to LCD, printing display, laser display, there are many companies are also developing QLED, Micro LED, holographic display technology, which Micro LED two or three years of concern, which is mainly affected by Apple's acquisition of Luxvue company. According to the China Optical Optoelectronics Industry Association LCD Branch executive vice president and secretary general Liang Qingxin said Apple has Micro LED R & D team transferred to China's Taiwan, where Apple has a 4.5 acquisition from Qualcomm 4.5 TFT production line, the main line In the panel analysis and certification and Micro LED research and development.
In fact, China's research institutions have long been developing Micro LED technology. As early as 2006, the Hong Kong University of Science and Technology team on the use of passive drive, the use of flip-chip technology integrated Micro-LED array. 2010 Hong Kong University of Science and Technology Z.J.Liu where the team were using red, green and blue three kinds of LED epitaxial wafers prepared 360ppi micro LED display chip. And Z.J.Liu where the Hong Kong University of Science and Technology team and the Sun Yat-sen team together to micro LED display resolution increased to 1700ppi, pixel pitch reduced to 12 microns.
Most of our LED manufacturers revenue is small, pay more attention to the LED business market itself, but for such as Micro LED this forward-looking technology investment is relatively small. In 2015, Riard launched the ultra-P0.9 mm high-definition seamless wall, which is the first on the market to achieve mass production of less than 1 mm pitch LED display, but mainly used in the field of indoor monitoring. Jiangsu Zhongchuang Chip Technology Co., Ltd. technical team in the gallium nitride Micro LED micro-display chip design and manufacturing breakthrough, demonstrated CMOS drive high brightness, low power consumption Green Micro LED active display micro-display chip, resolution to 1000ppi, medium-range brightness of 50000cd / m2.
Experts advocate LCD should be "security" and "keep"
From the domestic enterprise display technology layout can be seen, now the situation has been different from the CRT to the flat when the LCD and PDP only two hegemony era, but into the Warring States period, LCD, OLED, printing display, QLED, Micro LED, Laser display technology and other "significant" Chiaki.
Faced with so many display technology, China should be how to seek the layout, so that their own in the big screen era to maintain the leading edge?
China Optical Optoelectronics Industry Association, vice president of LCD branch Hu Chunming pointed out that China is currently the most competitive or LCD, 10.5 or 11 production line of the first to make China's industry to seize the initiative to adapt to the TV and other large-size display Demand, in the short term to protect China's advantages in this area.
Guan Xudong also pointed out that the current mainland China shows the industry's biggest advantage is large-size panel manufacturing industry, BOE and Huaxing photoelectric have their own investment in a 10.5-generation LCD panel production line, made a first-mover advantage, and they also have a super- LCD panel production line of the plan, and South Korean manufacturers do not seem to vote with the wishes, so the mainland to show the industry to be the first to break through the large-size LCD panel, "Shou" live has been results.
But now many people worry about the domestic LCD panel overcapacity, how to digest these production capacity is placed in front of a panel manufacturers a problem, so the most important thing is to provide large-size LCD panel to the sea. Now large-size LCD panel also can not see the new application market, so Liang Qingxin that large size and high resolution combined to seize the Japanese Olympic Games in 2020 to use 8K radio opportunities and promote the domestic radio and television opened 4K, 8K channel, This is the only way out of China's large-size LCD panel.
CCIDI Electronic Information Industry Research Institute researcher Gengyi also pointed out that China has bid farewell to the lack of screen era, and now how to use the downstream application of the reaction panel industry is very critical, for example, to promote the development of 4K, 8K applications, Size, high-resolution panel development.
At the same time, China should also continue to improve the industrial chain supporting, breaking the core technology. At present, China has been confronted with patent infringement. It is understood that the display material of the German Merck has now played a patent card, but not directly for the panel manufacturers, but suggested that the terminal manufacturers do not use the patent infringement of the LCD panel.
To dare in the emerging display "overtaking"
And large-size LCD relative to the large-size OLED. China Electronic Materials Industry Association Deputy Secretary-General Yuan Tong pointed out that OLED because of higher contrast, higher color saturation and surface display, in the alternative part of the small size of the display market has an advantage in the high-end large-size TV display market To maintain a rapid annual growth rate, but because the cost is 2.3 times the cost of the LCD panel, G8.5 generation of production lines and more production technology, supporting materials and other issues need to be resolved, it is expected to 2022, large-size OLED TV market share Rate is still a relatively small share.
At present, the production of large-size OLED only LGD one, but the OLED TV manufacturers have expanded from the original five to 13 this year, the market is gradually expanding, China is like small and medium size AMOLED follow the same size as the LGD OLED Technical route?
Gengyi said in an interview, LGD using WRGB technology introduced a large size OLED panel, from the display and thin point of view, more competitive, but the cost is still high, difficult and mainstream TFT-LCD competition, so with Or not with the technical route of LGD is worth a domestic panel business to consider a problem. And the printing technology used in large-size OLED display manufacturing industry is the direction of the industry, theoretically can reduce costs, the current mass production also need a relatively long time.
China has been like this company such as Poly is studying, and try to overcome the ink life, inkjet printing equipment and other problems. Zhu Changchang said that the printing of OLED to form China, South Korea, Japan and the United States four camps, South Korea camp to Samsung, LG-based, Japan to JOLED-based, the United States main printing OLED equipment. China's printing OLED started earlier, basically with the international at the same starting line, printing OLED is an important opportunity for China's overtaking.
Printing OLED as a new technology, unilateral investment risk is relatively large, Zhu Changchang that should be by the state, local common support, business participation, through the tripartite co-operation, focus on national superiority, in a relatively short period of time to break the bottleneck of printed OLED technology , To maintain the international advanced level, and even corners overtaking.
Laser TV has the same advantage in large size areas, but the contrast is poor because the projection is susceptible to external light. In the Chinese Academy of Sciences, Ouyang Zhongcan view, the current manufacturers of products used in most of the use of laser phosphor technology (ALPD), which is a blue laser excitation phosphor to produce white light technology to solve the problem of projection lamp life, but it Is similar to the LED technology, it is difficult to overcome the problem of laser phosphor technology speckle. This is also the current development of laser display problems.
However, Xu Lixin said that the laser display in the 75-inch market has an advantage, and China in the elimination of spots, light efficiency technology has certain advantages, should be laser display technology to practical and market-oriented. Now drive the chip, semiconductor light source and abroad have a certain gap, the need for further localization. At the same time, the laser display of key technologies, such as dissipation spots, color management technology, but also further practical, product.
Similarly, Micro LED in the large size field also has some potential. Micro LED combines low power, high brightness, ultra high resolution and color saturation, fast response, ultra-saving, long life, high efficiency in one, compared with LCD and OLED, Micro LED brightness and color Saturation advantage is very obvious. Lehman shares R & D director Tu Menglong pointed out that Micro LED indoor screen brightness can reach 1000 ~ 2000nit, LCD screen brightness can only reach several hundred nit. In addition, Micro LED can be used three primary colors or four primary colors and other programs, the color area covers a wider, better display.
AU Optronics Chairman Peng Shuanglang pointed out that Micro LED is a good technology, which combines the TFT backplane and LED solid state light of these two very mature technology, the cost is also significantly reduced. If Micro LED can enter the market several years earlier, there may be the mainstream of the market, but now cut into the market has a very big challenge.
Micro LED technology is facing many technical challenges, LED inside research assistant manager Simon Yang said that micro-LED manufacturing has many key technologies, including large-scale transfer technology in Micro LED manufacturing is the most difficult part of the drive IC, color conversion, detection Equipment, uniformity and other technical bottlenecks to be broken.
Guan Xudong said in an interview, China should focus on non-liquid crystal display technology to enhance the forward-looking technology research and development, especially Micro LED. "Do not underestimate the Micro LED, although it is still a clear threat to the liquid crystal display is now very difficult to see, but this possibility is there. Like the year of TFT technology, just beginning to obscurity from my country from the 80s of last century Began to study TFT technology, then no one concerned about the same 90 years to a very small minority, but look at today's display panel industry, has become the world of TFT.
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