B3-3 Formative Evaluation of Diverse Flexible Display Product Concepts Using Mock-Ups and Strategy Canvas

Abstract

This study evaluated flexible display concepts (foldable, rollable, and bendable) using the strategy canvas, and determined screen sizes suitable for each of five major smartphone tasks on foldable display concepts and preferred folding methods. Before using the strategy canvas to compare design concepts, two focus group interviews were conducted. The first interview was done with four design major students and the second with four human factors engineering major students. A total of 44 evaluation criteria obtained from these interviews were comprised of advantages, disadvantages, and characteristics of each flexible display concept. Thirty three evaluation items were selected and used when five researchers independently evaluated each flexible display concepts. The means of five evaluations were used to draw the strategy canvas. The foldable display concepts were scored the highest while the rollable display concept was scored the lowest. For the preferred screen sizes and the folding methods, a small screen size was preferred for the calling task, while a medium screen size was for the search and game tasks. An outward-folded screen type was preferred over an inward-folded type for one-fold screen concepts, while a z type (outward- and inward- folded screen) was preferred among three two-fold screen concepts. Overall, the z type was the most preferred concept. These findings will help to design ergonomic foldable display products and to improve rollable design concepts.