Affiliation:
1. Country State Key Laboratory of Opto‐electronic Materials and Technology Guangdong Provincial Key Laboratory of Display Materials and Technologies School of Electronics and Information Technology Sun Yat‐Sen University Guangzhou 510006 China
Abstract
AbstractElectrophoretic displays (EPDs) show great promise in the field of information display because of their eye‐friendly feature and high ambient visibility. Enhancing electrophoretic particle preparation and optimizing charge properties are crucial for display quality, response speed, and the capability to show full color. Despite the various methods explored, achieving a balance among simplicity, cost‐effectiveness, high surface charge, rapid response, and contrast improvement remains challenging. This study introduces a coupling‐grafting‐ultrasonication (CGU) approach. The surface charge and stability of the particles are turned by precisely adjusting the thickness of the poly (lauryl methacrylate) (PLMA) layer. Through optimization, TiO2‐PLMA electrophoretic particles with a grafting mass of 10 exhibit a fast response (170 ms for white, 120 ms for black), high contrast (30), and demonstrated long‐term stability in EPD devices. Furthermore, the CGU method proves to be versatile for colored EPD particle preparation, providing a new direction for the future development of EPD.
Funder
Science and Technology Planning Project of Guangdong Province
Special Project for Research and Development in Key areas of Guangdong Province
National Natural Science Foundation of China
Ministry of Science and Technology