Acoustic plate mode touch screen

Dieulesaint, E.; Royer, D.; Legras, O.; Chaabi, Abdelhafid

doi:10.1049/el:19910032

Cited by 19 publications

(7 citation statements)

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“…In the past years, touch panel has been a novel input device for operating system by users. The sensing principle of the touch panel can be divided into optical [1], acoustic [2], capacitive [3], and resistive [4][5] methods, especially it is increased emphasis on the projective capacitive touch sensing method which provides a high sensitivity of touch identification. However, it also has more perturbation on touch signals by display noise [6].…”

Section: Objective and Backgroundmentioning

confidence: 99%

P‐168: Modeling and Analysis of the Flexible Touch Panel on the Flexible Active‐matrix OLED Display

Pan

Tsai

et al. 2014

Symp Digest of Tech Papers

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Section: Objective and Backgroundmentioning

confidence: 99%

P‐168: Modeling and Analysis of the Flexible Touch Panel on the Flexible Active‐matrix OLED Display

Pan

Tsai

et al. 2014

Symp Digest of Tech Papers

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“…A flexible screen, however, also causes more problems for the touch element. For example, SAW elements are not foils, but stationary emitters and detectors that are placed around the screen [48]. This is why SAW cannot be used with flexible displays if the whole screen is to implement the touch ability.…”

Section: Structure Of the Future Tagmentioning

confidence: 99%

A novel concept of a wearable information appliance using context-based human–computer interaction

Ropponen

Linnavuo

Sepponen

2011

Pers Ubiquit Comput

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In healthcare environment, different kinds of automatic solutions have been created to monitor and track patients, for example near-field imaging and low-frequency RFID. The problem has been how to use the context-based data these systems produce and how to show the related information to the nursing staff. This paper shows how hospital data can be automatically transmitted to people using location information. The information is transmitted to a name tag that has wireless connectivity and touch screen with electric paper. This concept is piloted with a test application.

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“…Comparing with other acoustic approaches such as Rayleigh wave approach 3,4 or time-of-flight techniques, 5,6 the timereversal technique can be applied to most solids without any prior knowledge of acoustic properties. However, many human-machine interfaces prefer "touch" sensing than impact localization, because touch is perceived as a more userfriendly interaction.…”

Section: Tactile Objects Based On An Amplitude Disturbed Diffraction mentioning

confidence: 99%

Tactile objects based on an amplitude disturbed diffraction pattern method

Liu

Nikolovski

Mechbal

et al. 2009

Applied Physics Letters

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible.This is an author-deposited version published in: http://sam.ensam.eu Handle ID: .http://hdl.handle.net/10985/6519 To cite this version :Yuan LIU, Jean-Pierre NIKOLOVSKI, Nazih MECHBAL, Moustapha HAFEZ, Michel VERGÉ -Tactile objects based on an amplitude disturbed diffraction pattern method -2009Any correspondence concerning this service should be sent to the repository Administrator : archiveouverte@ensam.eu Tactile sensing is becoming widely used in human-computer interfaces. Recent advances in acoustic approaches demonstrated the possibilities to transform ordinary solid objects into interactive interfaces. This letter proposes a static finger contact localization process using an amplitude disturbed diffraction pattern method. The localization method is based on the following physical phenomenon: a finger contact modifies the energy distribution of acoustic wave in a solid; these variations depend on the wave frequency and the contact position. The presented method first consists of exciting the object with an acoustic signal with plural frequency components. In a second step, a measured acoustic signal is compared with prerecorded values to deduce the contact position. This position is then used for human-machine interaction ͑e.g., finger tracking on computer screen͒. 3,4 or time-of-flight techniques, 5,6 the timereversal technique can be applied to most solids without any prior knowledge of acoustic properties. However, many human-machine interfaces prefer "touch" sensing than impact localization, because touch is perceived as a more userfriendly interaction. 7,8 Indeed, some modern interaction modes such as "multitouch" 9 are difficult to achieve with "impacts," since it requires generating several impacts simultaneously on the tactile surface. Tactile objects based on an amplitude disturbed diffraction pattern methodRecently, an alternative method based on the crosscorrelation of selective absorption of the vibration modes has been presented. 10 This process is suitable for static contact localization. However, this process based on an absorption technique cannot address some particular uses such as stylus tip localization. In that case, contact creates more diffraction effect of the propagating acoustic waves than absorption. In this letter, we propose a tactile process based on an amplitude disturbed diffraction pattern ͑ADDP͒ phenomenon of an impulse acoustic wave. It expresses the following physical phenomenon: a human finger ͑or stylus͒ in contact with the objects affects the acoustic wave propagation in the solid. These disturbances depend on the finger position and the frequency of excited signal. With analysis and a calibration procedure of this variation, we can locate precisely the contact position.In the following examples, two emitters ͑piezoelectric transducers Pz27 type by Ferroperm, Denmark͒ transmit repetitive Lamb waves ͑period 1 ms͒ in t...

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Acoustic plate mode touch screen

Cited by 19 publications

References 1 publication

P‐168: Modeling and Analysis of the Flexible Touch Panel on the Flexible Active‐matrix OLED Display

P‐168: Modeling and Analysis of the Flexible Touch Panel on the Flexible Active‐matrix OLED Display

A novel concept of a wearable information appliance using context-based human–computer interaction

Tactile objects based on an amplitude disturbed diffraction pattern method

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