Portable Touch Screen
Portable Touch Screen
ABSTRACT
The paper aims at design of a portable system which can be mounted anywhere, possibly on a desktop or phone screen or projected screen and use the surface as a touch screen. For e.g. If the desktop is projected to a white screen mounted on a wall, the presenter can directly touch the white screen and perform all the mouse actions using his finger as the arrow without physically going near the system or seeking help of a system operator. Also if the system is mounted on desktop of PC the desktop can function as touch screen. Thus the product will be conducive to transform any screen or surface to a touch screen and hence the name 'Portable Touch Screen '. The underlying technology used is surface acoustic waves (SAW). The wave propagates on the surface and gets readily attenuated if interfered by soft objects. Main parts of the system includes two transmitting and two receiving transducers placed for X and Y axis. The electrical signal sent by the processing unit is converted to acoustic wave by the transmitting transducers and emitted to reflectors that are lined up as arrays. The waves are reflected to array of portable reflecting transducers, mounted properly, where they are converted back to electric signal and sent to processing unit. When a touch interfere the path of waves, the waves are attenuated causing a touch event to be detected at that point.
General Terms
Consumer electronics, Touch technology, Portable devices, embedded systems.
Keywords
Surface Acoustic Wave, Transducers, reflecting arrays, attenuation. 1. INTRODUCTION
Methods for interaction with digital world have developed into a wide and sophisticated field. The domain spreads in a vast area starting from basic keyboard and mouse to sixth sense technology and augmented reality. A basic peripheral to interact with digital world like mouse or keyboard is portable and can be attached to the system when required. But for making a screen
ABSTRACT
The paper aims at design of a portable system which can be mounted anywhere, possibly on a desktop or phone screen or projected screen and use the surface as a touch screen. For e.g. If the desktop is projected to a white screen mounted on a wall, the presenter can directly touch the white screen and perform all the mouse actions using his finger as the arrow without physically going near the system or seeking help of a system operator. Also if the system is mounted on desktop of PC the desktop can function as touch screen. Thus the product will be conducive to transform any screen or surface to a touch screen and hence the name 'Portable Touch Screen '. The underlying technology used is surface acoustic waves (SAW). The wave propagates on the surface and gets readily attenuated if interfered by soft objects. Main parts of the system includes two transmitting and two receiving transducers placed for X and Y axis. The electrical signal sent by the processing unit is converted to acoustic wave by the transmitting transducers and emitted to reflectors that are lined up as arrays. The waves are reflected to array of portable reflecting transducers, mounted properly, where they are converted back to electric signal and sent to processing unit. When a touch interfere the path of waves, the waves are attenuated causing a touch event to be detected at that point.
General Terms
Consumer electronics, Touch technology, Portable devices, embedded systems.
Keywords
Surface Acoustic Wave, Transducers, reflecting arrays, attenuation. 1. INTRODUCTION
Methods for interaction with digital world have developed into a wide and sophisticated field. The domain spreads in a vast area starting from basic keyboard and mouse to sixth sense technology and augmented reality. A basic peripheral to interact with digital world like mouse or keyboard is portable and can be attached to the system when required. But for making a screen
References: [1].S.Reis, V.Correia, M.Martins, G.Barbosa, R.M.Sousa,G.Minas S.Lanceros Mendez and J.G.Rocha,”Touchscreen based on acoustic pulse recognition with piezoelectric polymer sensors”,IEEE,2010. [2]. Mehrdad Ghaziasgar and James Connan ,”A Surface Acoustic Wave Touchscreen-Type Device Using Two Transducers”,2006. [3].Robert Adler and Peter J. Desmares , “An Economic Touch Panel using Saw Absorption”, 40th Annual Frequency Control Symposium,1986.