IDW consists of workshops technically categorized into specialized domains playing important roles in the information display technology field. Each workshop organizes its own sessions, which consist of oral presentations by invited/contributing speakers and poster presentations where detailed and fruitful discussions on each latest R&D update are provided. Some workshops also come together to form the common sessions called "Special Topics of Interest." The workshops should be of interest not only to researchers and engineers, but also those who manage companies and institutions in the information display community. The proceedings of IDW '21 will be available for registrants in an online program at the start of the first day of the conference. In addition, a few months after the conference, the proceedings will be provided as an online open-access archive and each paper will be given a unique DOI (Digital Object Identifier).