플립식 폴더블 폰 물리적 버튼의 인간공학적 설계

Abstract

Objective: The main purpose of this research is to study the physical button shape of the flip-type foldable phone, which can provide optimal usability and operational satisfaction during a one-handed gripping.<BR><BR>Background: Foldable phones which with larger screens and two different states (Unfolded, Folded) brings difficulties due to poor operability and grip comfort. Furthermore, the physical button of the smartphone has not yet been properly researched to guarantee optimal performance. Therefore, there is a need to ergonomically determine the shape and layout of the physical button that can manipulate the device stably and effectively that is mainly used with one hand.<BR><BR>Method: In this paper, two usability experiments were designed and conducted. In the prior experiment, 8 button length combinations of 2 buttons (9~17, 9~20.5, 9~24, 13~17, 13~20.5, 13~24, 17~20.5, 17~24mm) and 3 combinations of protrusion of 2 buttons (PYVY: both power and volume buttons are protruded, PYVN: power button is protruded while volume button is not, PNVY: power button is not protruded, and volume button is). So, a total of 24 combinations were tested. The dependent variables were evaluated by collecting the operability preference (7-point scale) as a subjective index, and the error rate as an objective index. In the main experiment, 6 physical button layouts were provided, and the optimal layout was obtained in two states by collecting and evaluating the user