Based on the rich content of patent information and its disclosure in advance, patents have become an important source of information to understand the strategic layout of competitors. Taking the competitors tracking and development path monitoring as a starting point, the global patent application trend, application type distribution, regional distribution and technology roadmap development of BOE and LG Display were analyzed. The strategy research and practice of competitors based on the patent information were detailed. Results show that both groups have the relatively high patent quality with the proportion of invention patent > 80% in recent years. They attach importance to different technology layouts in China, United States, Japan, Europe, and South Korea. Compared with LG Dispaly, the patent application activities of BOE start later, but it is full of innovation impetus. The application number of BOE has skyrocketed from 2010 to 2019 with average annual number of applications about 7 000.