We are fortunate enough to live in an era of technological revolution. Since the discovery of the organic electroluminescence phenomenon by Kodak’s Chinese researcher Deng Qingyun in 1979, O LED technology has been greatly developed, and it has been the star of future display technology by scientists. This is because the performance of O LEDs far exceeds that of LCDs and PDPs.
However, this technology still has many difficulties. From the perspective of development, I believe that the following problems still exist in OLED technology:
1. Size problem: According to the driving method, small-molecule OLED can be divided into PM-OLED and AM-OLED. The size of passive OLED cannot be made large. Active OLED can achieve a certain size of the panel, and its TFT substrate is generally non- Crystalline silicon, low-temperature polysilicon and OFTT are three. At present, large-size AMOLEDs mainly use a-Si as a TFT substrate, and a-Si-TFT itself is uneven in brightness due to problems such as threshold voltage drift and self-attenuation. Become the biggest obstacle to its mass production.
2. Lifetime problem: The life expectancy of mobile phone secondary screens currently seen on the market is generally around 3,000 to 5,000 hours. For mobile phones, it can meet the life expectancy requirements, but the TV terminal display is very far away. Of course, with The development of material purification technology will gradually solve the problem of life.
3. Process issues: As far as the current situation is concerned, the OLED mass production process is not very mature, and the yield of the products is not high. The three companies, Samsung, Pioneer and Sic Bo, can be said to be the largest suppliers of O- LED products , but their products are limited to small-sized mobile phone panels, mp3 panels, digital camera panels and other fields.
4. Intellectual Property Issues: The small molecule OLED core patent is mainly owned by Kodak Company, and the company is not active in granting intellectual property rights, which has caused certain difficulties for OLED manufacturers. In this regard, the polymer PLED technology mastered by CDT is better than Kodak. Moreover, many experts believe that the PLED using inkjet printing technology has great congenital advantages in large size, and the current mass production technology is not mature.
5. Cost problem: Since the current TFT-IC driver cannot replace the OLED-dedicated IC, the cost has increased.
6. Opportunities for domestic companies: There is such a data. In 2004, Samsung’s TFT display sales in the first quarter were 30 billion. This figure is quite a year with the gross domestic product of a large electronics company in China. Therefore, if domestic enterprises want to develop, they must be involved in the high-end parts industry. Due to technical problems, I think it is more appropriate to adopt a method of cooperation with foreign investors. Take advantage of our market advantages and the technical advantages of each other. In the OLED segment, I prefer to work with Korean-owned companies rather than Japanese companies. Korean companies are mostly friendly to China, and Japanese companies are guarding against us in high-tech.
In short, any technology will encounter setbacks in the early stages of development, which depends on the guidance and positioning of investors. TFT-LCD is a good example. In fact, if the PDP overcomes some technical problems, it will also be greatly developed. Without such positioning, the status of the PDP can only be bent on the LCD.
The above opinions are purely ones of the family. They do not represent the views of anyone. I welcome everyone to participate in the discussion. I hope that one day, we can see that China's OLED companies are doing well and growing up! (small soup)
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