Since 2009, in the short period of seven or eight years, there have been more than ten LTPS AMOLED production lines of 5.5 generations and six generations built and under construction in mainland China, and then there may be new production lines. Following the development of LCD, China will usher in a new wave of AMOLED. However, this round of AMOLED heat is dominated by South Korean manufacturers. Samsung, in particular, has monopolized the market for small and medium-size AMOLEDs with years of technology accumulation and marketing. Although the technology of Chinese mainland panel makers is not behind many, but the experience of industrialization and marketization is scarce, it is difficult to keep pace with Samsung. At present, the most important task of the Chinese mainland panel companies is to increase the yield. The biggest concern for the industry is the overcapacity. The biggest challenge is the flexible display.

The most important thing is that it is not easy to increase the rate of development of AMOLED. Samsung's achievements today are related to years of accumulation. Samsung has developed its algorithm for a long time. In order to improve this capability, it has also acquired a company specializing in the study of pixel algorithms. Samsung has spared no effort in improving the competitiveness of AMOLED technology. Gao Xiaoping, general manager of Fufu Electronics, adopted the FMM analysis at the 2017 China International OLED Industry Conference. From Samsung Note3 to Note8, Samsung stated that the pixel array of Samsung's flagship AMOLED display is different. This proves that Samsung has never stopped improving the AMOLED process.
Because of the difficulty of AMOLED technology, domestic panel makers have built several 5.5-generation lines. However, because the yield rate is still climbing, the production capacity is still limited, and only a small amount of products are supplied to downstream terminal manufacturers.
For domestic panel makers, the most important thing now is to increase the yield rate and increase the production capacity. Liang Xinqing, executive vice president and secretary-general of the China Optics and Optoelectronics Industry Association Liquid Crystal Branch pointed out at the 2017 China International OLED Industry Conference that it is good for China to invest in so many AMOLED production lines. However, if all of them can successfully mass-produce, they will release huge production capacity. Break Korea's monopoly; but if it can not overcome the technical problems is also a risk.
Since upgrading AMOLED production capacity is so difficult, how will Chinese mainland panel companies respond?
Zhang Deqiang, head of the Gu'an OLED project and head of black cattle food, pointed out at 2017 China International OLED Industry Conference that Visionox's development model is to conduct mass production-oriented basic research first, and then enter the pilot test. Production. In the basic research stage, we must look at the direction from the principle, and after selecting the right direction, we will conduct structural and material patent layout. After entering the pilot phase, we must first determine the process, open the route, verify the raw materials, cultivate suppliers, develop customers, and get customer feedback. After mass production after the pilot test, the risk is much smaller.
And Harmony and Visionox are not the same. Although there is no long history of research and development, Hehui Optoelectronics has found a group of talents who understand LTPS, and has conducted mechanism research and pilot tests while building factories, and has also achieved mass production. Tianma is divided into two teams to research AMOLED on the basis of the original LTPS, one team is responsible for LTPS, the other team specializes in the latter stage, and finally realizes mass production and shipment.
The biggest concern is overcapacity. If production is the first hurdle, then excess capacity may be the second hurdle after volume production.
Ouyang Zhongcan, an academician of the Chinese Academy of Sciences, predicts that in 2017 China's AMOLED production capacity may be only 600,000 square meters, but by 2022 it will reach 25.89 million square meters, with a growth rate of over 400 percent.
Compared with the year-on-year increase in the production capacity of AMOLEDs, the growth of the mobile phone market has started to slow down, and it is unlikely to increase 40 times in the next five years. Liang Xinqing stated that if optimistic estimates are taken, global smartphones will reach 2.5 billion by 2020, and more than half of them will adopt AMOLED screens. The number of AMOLED panels also exceeds the capacity of the smartphone market, so the production capacity of medium and small-sized AMOLEDs is surplus. He hopes that Chinese mainland panel companies must pay attention to the market when they increase production capacity and increase investment. Taiwan's Industrial Technology Research Institute director Zhang Zhanglin pointed out at the 2017 China International OLED Industry Conference that new applications must be tapped to digest these capacities.
Applying a flexible screen to a mobile phone may be a way to digest production capacity, as such a mobile phone may require three 5.5-inch AMOLEDs. According to Xie Qinyi, general manager of the IHS display department research department, the diagonal line of the three 5.5-inch lines is 9.7 inches, which means that the three iPhone panels line up exactly one iPad mini. So if the demand for mobile phone panels becomes 9.7 inches instead of 5.5 inches one day, then productivity may not be a big problem.
However, Tianqing Market Director Liu Qingquan has different opinions. He believes that the current demand situation is very healthy. There are only a lot of players from the perspective of supply structure and it seems that there will be oversupply. However, oversupply is an inevitable process for the industry. It is a process of commoditizing products. If the LCD has not undergone conversion in the past twenty or more supply cycles, the LCD industry will find it difficult to have today's market situation. At present, for the panel makers, they do not care about the supply and demand issues. What cares more is how to improve the technology and services to meet the needs of customers.
The biggest challenge is that the flexible display is the biggest challenge compared to the first two hurdles.
China's AMOLED just needed to compete for the flexible display market. Cheng Zhanglin pointed out why the industry has such a great expectation for Flexible AMOLED because wearable products give people a lot of hope for flexible displays. Now that the display has become a part of people's lives, it is difficult for people to leave the mobile phone, and people need mobile phones in all aspects of their lives. In the future, with the continuous evolution of wearable products, flexible displays may become part of the body.
But developing flexible displays is not easy. Cheng Zhanglin once worked for Kodak and experienced Kodak's cooperation with Sanyo to develop OLEDs. He said that when Sanyo made the next board and Kodak made the board, the middle experienced a lot of difficulties. This is still rigid AMOLED; developing the Flexible AMOLED is even more difficult. Do not hope to use Flexible AMOLED with existing processes and technologies. He believes that the current technology and yield are not yet in place.
The hardest thing about flexible AMOLEDs is the form of use. Nowadays, flexible AMOLEDs can withstand 100,000, 200,000 or even 300,000 bendings. At present, there is still a lack of data on this aspect.
Most manufacturers are now demonstrating flexible display samples, but there is still a long way to go from sample to product application. Although Samsung has made flexible plastic substrates, it is not ready for flexible displays. There is still a long way to go before we can make a firm decision and achieve the expectation of users.
Flexible OLEDs are indeed a differentiated direction of development. They have also been speculating for many years, but panel makers are still exploring flexible OLEDs. Xie Qinyi believes that flexible OLED technology has no previous experience and can only eliminate numerous blind spots in technology through constant exploration. The first problem to be solved is the bending problem, but Samsung Display Company believes that it is not difficult to implement flexible AMOLED, and the difficulty is in the flexible touch screen. For this reason, Samsung has made many attempts to integrate optical films. If the Touch Sensor is directly mounted on the package layer, this has structural advantages, but it also has structural disadvantages. If the package is not completed, the Touch will fail because the Touch Sensor is directly on the package layer.

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