Touch Screen SensorsOutlineReferencesTo Explore FurtherWhat are Touch Screen Sensors?Types of Touch Screen SensorsExternal Add On Touch Screen SensorIntegrated Touch ScreensWorking PrinciplesSlide 10Working Principles Multiple Types of Touch SensorsResistiveSurface Acoustic WaveCapacitiveInfraredStrain GageTypical ApplicationsSlide 18Slide 19CostWhere To BuyTouch Screen SensorsThomas ShupeECE 5320 MechatronicsAssignment #1Outline•References•To explore further•What are touch screen sensors•Different types touch screen sensors•Working principles•Major applications•Cost•Where to buyReferences•http://en.wikipedia.org/wiki/Touchscreen•http://www.touchscreens.com/intro-anatomy.html•Research Note on Touch Screen Sensors by Andrew Nathanson•http://www.wisegeek.com/what-are-touch-screen-monitors.htmTo Explore Further•http://searchcio-midmarket.techtarget.com/sDefinition/0,,sid183_gci214510,00.html•http://www.howstuffworks.com/question716.htm•Multi-Touch Interaction Research by Jeff han http://cs.nyu.edu/~jhan/ftirtouch/What are Touch Screen Sensors?•“A Touchs creen is a display which can detect the location of touches within the display area. This allows the display to be used as an input device, removing the keyboard and/or the mouse as the primary input device for interacting with the display's content.”http://en.wikipedia.org/wiki/TouchscreenTypes of Touch Screen Sensors•External add on touch screens•Integrated Touch Screen MonitorsExternal Add On Touch Screen Sensor•Can be added to your home computer•Brings touch screen technology to the common userhttp://www.touchscreens.com/intro-anatomy.htmlIntegrated Touch Screens•The sensor system is already integrated into the screen or monitorhttp://techon.nikkeibp.co.jp/english/NEWS_EN/20071025/141314/thumb_430_iiD.jpgWorking Principleshttp://www.touchscreens.com/intro-anatomy.html•A clear touch sensor is placed over the viewable video screenWorking Principles•A controller (2) takes information from the touch screen (1)•The info is turned into information the computer can understand• A software driver is needed to allow the touch screen and computer to work together (3)http://www.touchscreens.com/intro-anatomy.htmlWorking PrinciplesMultiple Types of Touch Sensors•Resistive•Surface Acoustic Wave•Capacitive•Infrared•Strain GageResistive•Composed of several layer including two metallic layers separated from each other•When metallic layers are connected (touched) they act as like 2 voltage dividers•Change in electric current is sent to controller and the location is determinedhttp://www.made-in-china.com/image/2f0j00bMTQkrgBRYpuM/Metal-Oxide-Film-Fixed-Resistor.jpgSurface Acoustic Wave•Uses Ultrasonic waves across the surface•When the screen is touched part of the wave is absorbed•This allows the controller to determine the position of the touch http://magicseaweed.comCapacitive•Coated with a current conducting material •Sensor has a precisely controlled field of stored electrons in horizontal and vertical directions•Humans also exhibit capacititance•A controller detects when there is a disturbance in the electric field (touch)•The controller then determines the locationwww.inelectronicsltd.co.ukInfrared•An array of infrared sensors are placed horizontally and vertically•The sensors send out pulses of light•The sensors detect the interruption of the light•The location is then determined by the controllerStrain Gagehttp://etestinc.com/db4/00336/etestinc.com/_uimages/strainguage.bmp•Screen is mounted on four springs one at each corner•Deflection of screen when touched is measured by all four strain gages•Calculations are made based on each of the four deflections to determine the location of the touchTypical ApplicationsCredit Card ScannersTypical ApplicationsConsumer Electronics•Phones•PDA’s•Digital Cameras•GPS•etcwww.trafficdominatetricks.com/jv/prizes.htm techwoo.com/hp-ipaq-112-classic-pda-phone/ http://migs.wordpress.com/2007/06/28/new-touch-screen-phones/Typical ApplicationsATMhttp://www.acceptvisaandmastercard.com/assets/images/atm1.jpgInteractive Kiosks and learningstationshttp://www.mce-sign.com/images/produits_multimedia/kaori.gifEtc. Etc. Etc.Cost•Overlay screen $169 - $299•Integrated Touch Screen Monitor–12” LCD $609–17” Monitor $539–42” LCD $4872http://2make-money.biz/images/money344.jpgWhere To Buy
View Full Document
Unlocking...