As mentioned above, OLED Or QLED, on TV display The fields are still in the developing 'cradle period'. But in recent years, with the iterative 'wheel acceleration' of display technology, more and more new technologies are emerging, and there is a lot of momentum in killing OLEDs and QLEDs in the cradle. , MicroLED is one of the important leading roles. Following the 2017 Japan Sony exhibited a large size (970cmx270cm) Micro 8Kx2K resolution LED display Later, at CES in 2018, many manufacturers also began to promote Micro. LED display The application of technology in the field of TV, such as Samsung Electronics exhibited 146-inch ultra-large-sized MicroLED TVs this year, Lumens also exhibited 130-inch and 139-inch ultra-large-size MicroLED displays, MicroLED wave hit quietly.
Huaxing Optoelectronics TV Display Division Product Manager Jiang Ruifeng
However, in the view of Jiang Ruifeng, product manager of Huaxing Optoelectronics TV Display Division, at present, MicroLED does not pose a great threat to OLED and QLED in the field of TV large-screen display. He believes: 'Compared to the above two, MicroLED wants to be on TV. There are more difficulties in landing large-screen display areas. At present, exhibitors at CES are also in the advanced stage. There is actually no real commercialization of the products. As far as MicroLED itself is concerned, the biggest problem at the moment is the high cost. The yield is low, and the batch production is difficult. Specifically, for example, in the case of a large amount of transfer, the process from the sapphire substrate to the glass substrate is very difficult, especially the mass transfer of such micro devices, and PH (Pick up head) The mechanism, the size of the PH, the impact of the contacts during the huge transfer, the time required, and the Place and Bonding after the transfer are also difficult.
Moreover, in practical applications, current control and power consumption are also very big problems. Jiang Ruifeng explained: 'Mainly, if the current LED is used in monitor At the top, it will look quite bright. For example, if a LED with a drive current of 1uA and a forward voltage of 3V is used on a full HDTV, the viewer is facing an 18W LED light bulb and watching TV is too bright. Obviously a problem, but this is also an advantage of the self-luminous display because LCD Display light penetration efficiency, Micro LED Display is much higher, the current LCD display backlight usage is about 5 to 7%. But from another point of view, if you lower the LED current, the brightness will drop, along with The problem is that the current density is too low, causing poor uniformity. Another major problem in current control is that when the LED progresses to miniaturization, the leakage current of the light emitting device will increase, especially the edge leakage. The situation. How to use Filter to solve the problem of brightness is too bright, in addition to the structure must have other ways, in the Driver IC part must also participate. Finally, is the compatibility of Micro LED Display and the existing LCD and industry chain The problem, the development of Micro LED Display has a very important role is to be able to repeatedly use the TFT LCD panel plant in the past a large amount of investment in capital expenditures, that is to say in the Micro LED Display, you must also think about how to be compatible with the current TFT LCD industry, so in the initial design, we must consider this issue. Micro LED Display is not to replace the LCD industry, but to replace the liquid crystal layer in the LCD industry. The TFT machine and the CF machine must be reusable. At the same time, the drive mode must be considered, especially the active drive mode. In addition, in the technical part of the optical package, it may be feasible to use the CF machine to change the machine. Considering that TFT and CF machines can be reused, it means that about 70% of the original investment of LCD manufacturers will be reusable. If coupled with detection methods, the research and development of repair technology, in the integrated supply chain, Micro LED Display also still has considerable challenges.
Deyuan Innovation Technology Co., Ltd. Market Director Li Jun
However, for the user, Li Jun, Marketing Director of Deyuan Innovation Technology Co., Ltd. thinks what kind of display technology the TV manufacturer uses is actually not important. What the user really cares about is how to achieve TV picture quality. And the performance of the same level of screen upgrade. Therefore, with the large-scale popularization of 4K display today, 8K becomes the next generation technology upgrade direction favored by consumers and pursued by TV manufacturers. To this end, all major TV manufacturers are In the strong push 8K screen Display technology For applications in the TV field, such as August 31, 2017, Sharp released the world’s first consumer-grade 8K TV, Sharp despise AQUOS, priced at 68,888 yuan; and on September 7, 2017, BOE displayed a full range of 8K panel products, including 27-inch, 65-inch, 75-inch, 98-inch and 110-inch 8K TV panels; LG also expressed interest in 8K technology in the third quarter conference call. Samsung, Changhong, and TCL and other manufacturers also Are trying to promote the commercialization of 8K display technology, which shows the confidence of TV manufacturers and panel makers on 8K.
For the development of TV 8K display technology in 2018, Jiang Ruifeng predicted: 'In 2018, the TV display area will still be based on 'picture quality and appearance', and 4K will achieve full coverage in the medium and large size market, 43 to 50 percent. The mid-size segment TV display will become the main penetration direction of 4K, penetration rate is expected to exceed the level of 44.5%, and in this trend, 8K will become the next battlefield for panel manufacturers to compete. However, subject to human eyes can be identified Capability, 8K products will mainly focus on large size TVs of 65 and above Display market , And will be expected to accelerate penetration after 2019, is expected to 202 8K penetration rate can reach 3.5% level. '
Li Jun believes that 2018 will be the first year of 8K development in the TV large-screen display market. He explained: 'First of all, since 2018 SoC solutions for 8K display will be gradually delivered in volume production, which makes the whole TV Can realize the real meaning of 8K; Second, under BOE and LG's G10. 5 production line formally put into operation, after 2018 there will be more and more 10. 5 generation production line ushered in mass production, 65 and The above large-size panels provide basic production capacity guarantees, and with the large-scale production volume, it will also drive the growth of 8K product shipments. Furthermore, it is the needs of the entire plant industry for technology and market transformation. At present, other competitors are In the active planning and layout of 8K, such as the Sharp brand has released 8K products in the past year, Samsung Electronics will also actively promote 8K technology this year, and domestic companies such as TCL, Changhong have also been followed up, so if the industry manufacturers 8K will not keep up with the trend; Finally, mobile operators in China and other regions are also actively planning 5G commercial networks, which will be able to more effectively support the transmission and operation of 8K content. Overall, 2018 Will push 8K technology A key year for landing and product popularization, it is expected that there will be very good performance in the TV market.
