担当区分：筆頭著者,　責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Frontiers Media SA  

To enrich the virtual reality experience and improve realism, many studies have proposed embedding tactile devices into head-mounted displays (HMDs). However, although thermal and vibrotactile cues have become commonplace, presentation of the constant pressure necessary for softness expression remains relatively rare. In this study, we propose a suction-type tactile presentation method that addresses this issue. Through subjective evaluation and simulation using the finite element method, we verified that the proposed suction-type tactile presentation method is suitable for use with HMDs and that by increasing the number and density of the suction holes, a stronger tactile sensation can be created.

DOI： 10.3389/frvir.2022.894873

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DOI： 10.1007/978-3-031-70058-3_26

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DOI： 10.1007/978-3-031-70058-3_10

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記述言語：日本語   出版者・発行元：特定非営利活動法人 日本バーチャルリアリティ学会  

DOI： 10.18974/jvrsj.29.1_39

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

We present ExtEdge, a design and method for augmenting the visual experiences of a smartphone using electro-tactile stimulation. We aim to explore new interactions through tactile augmentation of visual information, such as virtual characters, at the edges of the screen. ExtEdge presents distributed tactile sensations through electrical stimulations from electrode arrays mounted on both edges of the smartphone. This distributed tactile stimulus fits the image at the edges of the screen and provides a more realistic presentation. We first investigated two-point discrimination thresholds in the contact areas of the grasp - middle finger, ring finger, thumb, and thenar eminence - as a performance evaluation of the distributed tactile presentation and found that our design was adequate. We then conducted a user study with some application scenarios and confirmed that ExtEdge enriches visual information.

DOI： 10.1145/3607822.3614543

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記述言語：日本語   出版者・発行元：一般社団法人 日本機械学会  

Considering our perpetual engagement with smartphones and the colossal quantities of information we handle, it is crucial that we possess a smartphone input method with a high degree of usability. We devised a grip input method using an electro-tactile stimulation interface on the edges of a smartphone. This method is characterized by two distinctive features: it converts changes in finger contact area into input as opposed to relying on force sensing, and it provides softness sensation as input feedback through the electro-tactile stimulation. We first evaluated the grip input's performance in relation to changes in finger contact area and found it to be exceptionally high. Then, we evaluated the change in perception with and without two types of electro-tactile stimulations and observed that the electro-tactile stimulation resulted in the softness sensation.

DOI： 10.1299/jsmermd.2023.2a2-i24

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