[其它] Paranga: A Book-shaped Device with Tactile Feedback

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发表于 2011-12-20 09:09:47 |只看该作者 |倒序浏览

Paranga: A Book-shaped Device with Tactile Feedback

Hiroyuki Kidokoro1, Kazuyuki Fujita1, Masanori Ohwaki1, Khoa Doba2, Christopher Chung2, Yuichi Itoh1

1Graduated School of Information Science and

Technology, Osaka University, Osaka, 565-0871 Japan

{kidokoro.hiroyuki, fujita.kazuyuki,

ohwaki.masanori, itoh}@ist.osaka-u.ac.jp

2Worcester Polytechnic Institute

Worcester, MA, 01609-2280 USA

{khoadoba, cchung}@wpi.edu

1. Introduction

A flipbook is the one of plays featuring page-turning action that is

familiar to us in our life. It gives us not only funny visual

feedback that a written character looks as if it moves, but also

tactile information when pieces of paper touch user’s thumb page

by page. In recent e-reader devices such as iPad, we can also see

page-flipping animations when users turn pages. E-book generally

does not provide any tactile feelings of paper in reading a book.

In fact, feeling the sensations of the real papers during reading an

e-book was regarded as important thing in previous studies [1].

In this study, we develop a novel book-shaped device "

aranga"

to give users the tactile sensations of thumbing pages of real book

on their thumb, even when they read an e-book on Paranga.

(Figure 1). When users perform to turn the pages of Paranga, it

provides infinitely user’s thumb with tactile sensations using

roller with pieces of paper. In addition, we implemented two

applications using Paranga: one is what improves e-reader’s

operations, and the other one is what augments flipbook’s

experiences.

2. System configurations

Paranga is the device including two facing parts like a real book.

The right side of the two parts is for controlling flipped pages, and

the left side is for displaying contents. In the controlling part, we

implemented the mechanism shown in Figure 2 to realize flipping

pages. This part is made of a sheet of rubber that enables users to

easily bend in an arc. To detect the degree of bending the

controlling part, a bend sensor is installed on the center of it. To

reproduce the tactile sense when users thumb pages, the roller,

cylindrical metal rod attached radially 24 sheets of paper to, is

installed with a motor on the edge of the controlling part. In

response to an increase of the degree of bending, the rotation rate

of the roller gets faster. It gives the tactile sensations of flipping

pages to a users’ thumb. In this mechanism, however, the roller’s

rotating speed gets significantly slow when the user presses firmly

the roller with her/his thumb. Therefore, we installed a rotary

encoder that enables to obtain 24 pulses per revolution on the axis

of rotation of the roller. It detects degree of rotating speed

variation caused by the thumb’s pressure, and then the system

controls the rotating speed.

Figure 3 shows the system architecture of Paranga. Paranga works

with Arduino connected with PC. Arduino gets inputs and controls

outputs: The inputs are the data extracted by the bend sensor and

the rotary encoder. The output is rotating speed of the motor. The

contents displayed on the monitor are determined by the rotating

data gotten from Arduino. We used Flash as the animations

displayed on the monitor.

3. Applications

We implemented two applications using Paranga. The first one is

an application that presents users page-turning animation at the

same time as tactile feedback. This improves the operation of

flipping a lot of pages in e-reader devices. The reason is that users

had to use cumbersome interfaces like a slider bar if they want to

jump to a far page in existing e-reader devices.

The second one is what augments flipbook’s experiences; the

story of the flipbook changes depending on the speed of flipping

pages, while normal flipbook has a fixed story. In our

implementation, the repeated animation changes into another one

when the flipping speed is higher than a certain threshold. For

example, we made an animation inspired by the film “Matrix”: A

stickman looks shot by another stickman while users flip pages

slowly, but when flipping fast users find that the stickman is

actually twisting his body and dodging bullets.

4. Conclusions

We proposed a novel book-shaped device called “Paranga” which

provides user’s thumb with the tactile sensations of flipping pages,

and implemented several applications that utilize them. In the

future, we are planning to install the mechanism and flexible

displays in the both sides of the device, which will enables

displaying two facing pages and bidirectional flipping pages.

References

[1] Yamada, H.: SequenceBook: interactive paper book capable

of changing the storylines by shuffling pages, Proc.

CHI ’10 Extended abstract, pp. 4375-4380 (2010).