Photoresist ink panel LCD technology urgently needs to be broken

"At present, most of the pigments used in liquid crystal displays can be produced domestically, but they cannot be used on liquid crystal displays because they do not possess dispersion technology." The international dyeing that was held last week against the huge market gap in China's LCD industry for photoresist inks. Experts at the Pigment Industry Development Forum issued an appeal, and research institutes should pay attention to the research and development of photoresist ink production technology. If you do not take effective measures as soon as possible, the liquid crystal industry will be difficult to change over the long term.

Professor Zhou Chunlong of Tianjin University pointed out that at present, not only does China not have the production technology of photoresist ink, but scientific research institutions also have few research breakthroughs in this field.

Shanghai Hongjie Chemical Industry Group Co., Ltd. is one of the few companies in China that can produce pigments for liquid crystal displays. It is understood that due to the lack of know-how in the production of photoresist inks, the company produces phthalocyanine blue 15:6 and turnip green. 36 and other pigment products are mainly exported to Japan and South Korea for the production of photoresist ink. River North Lida Pigment Industrial Co., Ltd. also faces the same situation, its production of phthalocyanine blue 15:6 mainly for Taiwan and exports to Japan and South Korea.

At present, the pigments used in liquid crystal displays are high-grade pigments. The basic flow of application is: high-grade pigment-photoresist ink-CF-liquid crystal panel. That is, first, high-grade pigments are processed into photoresist ink, and then the photoresist ink is printed. On the glass panel, CF, which determines the image quality of the display, is made, and the CF and other components constitute the liquid crystal display.

“Distribution technology is the key to restricting the use of pigments in liquid crystal displays,” said Ruolin Lin, director of the pigments division at DIC Corporation in Japan. “Because the demand for decentralized technology is high, it is difficult for new manufacturers to enter this market. At present, China has not produced light. Resist ink manufacturers have only a few manufacturers that assemble color filters and LCD panels."

According to Li Yaqin, a senior analyst at Avi Consulting, China is a big consumer of LCD panels. However, domestic manufacturers can only meet 5% of the demand for LCD panels in China. Photoresist inks, one of the core components of LCD panels, need to be imported. , facing a huge market gap. China's LCD industry in the upper reaches of the industrial chain, such as photoresist ink, filter and other core aspects of the development of the relative backwardness, leading to long-term control of the liquid crystal industry.

While China has not mastered the technology of pigment-based ink printing technology, developed countries have begun to develop new alternative technologies. Ruolin Lin introduced that the use of organic pigments in the production of photoresist inks is currently under way. It is expected that from 2011, new technologies will be expected to use dyes to produce photoresist inks.