Characterization of surfaces virtually created using MEMS tactile display

Kosemura, Yumi; Ishikawa, Hiroaki; Watanabe, Junpei; Miki, Norihisa

doi:10.7567/jjap.53.06jm11

Cited by 13 publications

(17 citation statements)

References 31 publications

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“…Our group developed an array of micro-actuators consisting of hydraulic amplification mechanisms and piezo-electric actuators that can stimulate all the tactile receptors to create various tactile sensations, such as roughness and hardness [ 12 ]. To evaluate the tactile sensations that can be produced by the developed mechanotactile display, we newly proposed a sample comparison method [ 13 ]. However, the high power consumption and bulkiness of the mechanotactile displays make them unsuitable for wearable applications.…”

Section: Introductionmentioning

confidence: 99%

Presentation of Various Tactile Sensations Using Micro-Needle Electrotactile Display

et al. 2016

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Tactile displays provoke tactile sensations by artificially stimulating tactile receptors. While many types of tactile displays have been developed, electrotactile displays that exploit electric stimulation can be designed to be thin, light, flexible and thus, wearable. However, the high voltages required to stimulate tactile receptors and limited varieties of possible sensations pose problems. In our previous work, we developed an electrotactile display using a micro-needle electrode array that can drastically reduce the required voltage by penetrating through the high-impedance stratum corneum painlessly, but displaying various tactile sensations was still a challenge. In this work, we demonstrate presentation of tactile sensation of different roughness to the subjects, which is enabled by the arrangement of the electrodes; the needle electrodes are on the fingertip and the ground electrode is on the fingernail. With this arrangement, the display can stimulate the tactile receptors that are located not only in the shallow regions of the finger but also those in the deep regions. It was experimentally revealed that the required voltage was further reduced compared to previous devices and that the roughness presented by the display was controlled by the pulse frequency and the switching time, or the stimulation flow rate. The proposed electrotactile display is readily applicable as a new wearable haptic device for advanced information communication technology.

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Section: Introductionmentioning

confidence: 99%

Presentation of Various Tactile Sensations Using Micro-Needle Electrotactile Display

et al. 2016

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“…They densely arrayed them to develop a high spatial resolution tactile shape display. Kosemura et al developed a micro-fabricated tactile display with an array of piezo actuators [7]. They experimentally investigated the relationship between the vibration condition of actuators and the presented virtual surface through the tactile display.…”

Section: Introductionmentioning

confidence: 99%

Fundamental Perceptual Characterization of an Integrated Tactile Display with Electrovibration and Electrical Stimuli

2019

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Tactile displays have been widely studied for many decades. Although multiple tactile stimuli are more effective to improve the quality of the presented tactile sensation, most tactile displays provide a single tactile stimulus. An integrated tactile display with electrovibration and electrical stimuli is proposed herein. It is expected that vibrational friction, pressure and vibration can be presented at the same time through the tactile display. Also, these stimuli only require electrodes for stimulation. Therefore, the tactile display can be easily miniaturized and densely arrayed on a substrate. In this study, a tactile display is designed and fabricated using the micro-fabrication process. Furthermore, the display is evaluated. First, the relationship between a single stimulus and the perception is investigated. The electrovibration and electrical stimuli have a frequency dependence on perception. Second, whether the multiple stimuli with the electrovibration and electrical stimuli are perceivable by the subjects is also evaluated. The results indicate that the multiple tactile stimuli are perceivable by the subjects. Also, the possibility that the electrovibration and electrical stimuli affect each other is confirmed.

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“…Microelectromechanical systems (MEMS) technology is beneficial in miniaturizing the actuators, and thus enhancing the resolution of tactile displays [8]. An array of large-displacement microactuators composed of piezoelectric actuators and hydraulic displacement amplification mechanisms enable a variety of tactile sensations [9,10,11]. The electrical tactile displays directly stimulate the nerves inside the human skin using electric current.…”

Section: Introductionmentioning

confidence: 99%

“…It may be noted that almost all these tactile displays are designed to be used alone. Tactile displays have the potential to add tactile feedback functionality to existing information devices, however, this is hindered by their stiffness [1,2,3,9,10,11,12] and bulkiness [4,5,6,7]. The display consequently increases the volume and weight of the information devices.…”

Section: Introductionmentioning

confidence: 99%

Development of a Fully Flexible Sheet-Type Tactile Display Based on Electrovibration Stimulus

et al. 2018

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Tactile displays have been extensively studied for several decades. However, owing to their bulkiness and stiffness, it has been difficult to integrate these displays with information devices to enable tactile communication between the devices and their users. This paper proposes a novel sheet-type electrovibration tactile display that consists of poly(3,4-ethylenedioxythiophene) polystyrene sulfonate conductive layers and an insulation layer of polydimethylsiloxane. The tactile display is sufficiently thin and flexible for attaching onto various surfaces. In this study, the tactile display was micro-fabricated and characterized through experiments. The experimental results indicated that the tactile display exhibited good durability under bending and that it could present various tactile sensations depending on the type of voltage waveform. In addition, the effect of using a combination of electrovibration and thermal stimuli was also demonstrated. The sheet-type display was attached onto a Peltier element; the thinness of the structure enabled the display to conform to the element and ensure good heat transfer. In the experiment, subjects were asked to scan the display with their fingertips. The results showed that multiple tactile stimuli were also successfully perceived by the subjects.

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Characterization of surfaces virtually created using MEMS tactile display

Cited by 13 publications

References 31 publications

Presentation of Various Tactile Sensations Using Micro-Needle Electrotactile Display

Presentation of Various Tactile Sensations Using Micro-Needle Electrotactile Display

Fundamental Perceptual Characterization of an Integrated Tactile Display with Electrovibration and Electrical Stimuli

Development of a Fully Flexible Sheet-Type Tactile Display Based on Electrovibration Stimulus

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