Abstract: The application of visual inspection technology in digital printing equipment is increasingly gaining attention,as it plays a crucial role in improving print quality,optimizing production efficiency,and reducing production costs. Analyzing the development trends of this technology from a patent perspective can help enterprises make rational patent deployments and avoid intellectual property risks. By conducting patent analysis and discussion on the application of visual inspection technology in digital printing equipment,this paper explores the patent application trends and geographical distribution of applications in this field,and elaborates on the main technical branches and key patents of color management technology. Combined with specific patent technologies,the technological advancements in aspects such as color gamut expansion,ink droplet control,and color calibration are analyzed,and suggestions for future development are put forward.

Key words: patent analysis, visual inspection, digital printing, color management