Research progress of color photoresists for TFT-LCD

Thin-film transistor liquid crystal display (TFT-LCD) has become the mainstream display product because of its advantages of low cost, long service lifetime and high image quality. The color filter film is a key component of TFT-LCD, which determines the product's image quality. As the raw material of color filter film, the red-green-blue photoresists have decisive effects on the brightness, contrast and color saturation of TFT-LCD. The color photoresist (CPR) is a type of formulated material, including resins, photoinitiators, polymerizable monomers, pigments or dyes, solvents, additives, etc. How to design and optimize these components to meet the performance of TFT-LCD is the core of CPR material research. In this paper, the principles and compositions of CPRs are introduced, and the selection and influence of key components are described. Secondly, the academic and industrial research on the performance of CPRs was discussed. Finally, the research status of CPRs is summarized and the future is prospected.