A comprehensive stylus evaluation methodology and design guidelines

Abstract

The stylus is a flexible input device that enables traditional computer interactions and personalization of input. It extends natural and intuitive ways of interacting with computing devices by bringing in the familiar feel of pen on paper. There are two kinds of Styli, Active and Passive. A passive stylus is one that emulates finger touch interactions with no added functionality, while an active stylus is one with added capabilities that could enhance productivity, creativity, and common consumer functions, allowing for a seamless and easy to use computing experience on the go. This paper presents an evaluation methodology for an active stylus. Various factors were considered to provide a set of guidelines and recommendations to enable an optimal stylus experience. Factors identified were based on biomechanics, ergonomics, user preference, human comfort, usability/ease of use, motor control, and performance, all of which collectively impact the experience. The parameters evaluated include overall physical design, adequate palm rejection, productivity usages, efficiency, and convenience. The automated evaluation involves a specific laboratory setup to assess the creative usages of the stylus including accuracy, latency, and pressure sensitivity.