Đề tài Touchscreen Technology

TOUCHSCREENTECHNOLOGYGroup Members: 1. Trinh Duc Trung2. Vu Duc Tuan3. Le Dinh NamTeacher: PhD. P. N. Thanh LoanHanoi University of Science and Technology CONTENTS1. INTRODUCTION2. RESISTIVE TOUCH SCREEN3. PROCESSING DATA TOUCH SCREEN TECHNOLOGIESBASIC STRUCTUREAPPLICATIONSDEFINITION OF TOUCH SCREENINTRODUCTIONDEFINITION OF TOUCH SCREENA touchscreen is an electronic visual display that can detect the presence and location of a touch within the display area. The term generally refers to touching the display of the device with a finger or hand. It means that it is an input device that allows users to operate a PC by simply touching the display screen.APPLICATIONSPublic info and tech systemsRestaurant, hotel, hospital systemsTablets and smartphonesControl/ automatic systemsBASIC STRUCTURETOUCH SENSORA touch screen sensor is a clear glass panel with a touch responsive area.The touch sensor is placed over a display screen so that the responsive area of the panel covers the viewable area of the screen.CONTROLLERIt is a small PC card that connects between the touch sensor and the PC. It takes information from the touch sensor and translates it into information that PC can understand.SOFTWARE DRIVERThe driver allows the touch screen and computer to work together.This makes touching the screen as same as clicking the your mouse at the same location on the screen.TOUCH SCREEN TECHNOLOGIESResistive Touch ScreenCapacitive Touch ScreenSurface Wave Touch ScreenInfrared Touch ScreenOptical Imaging Touch Screen CONTENTS1. INTRODUCTION2. RESISTIVE TOUCH SCREEN3. PROCESSING DATA RESISTIVE TOUCH SCREENPolyester Film .Top Resistive Layer.Conductive Transparent Metal Coating.Bottom Resistive Layer .Insulating Dots .Glass SubstrateComposed of several layers Two Electrically conductive layersRESISTIVE TOUCH SCREENRESISTIVE TOUCH SCREEN Resistive touch screen monitor is composed of a flexible top layer and a rigid bottom layer separated by insulating dots, attached to a touch screen controller.The inside surface of each of the two layers is coated with a transparent metal oxide coating Pressing the flexible top sheet creates electrical contact between the resistive layers, producing a switch closing in the circuit.The controller gets the alternating voltages between the two layers and converts them into the digital X and Y coordinates of the activated area. CONTENTS1. INTRODUCTION2. RESISTIVE TOUCH SCREEN3. PROCESSING DATA PROCESSING DATA  A resistive touch screen system:Touchscreen panelTouchscreen controllerMicroprocessor TOUCH SCREEN CONTROLLER Including: Driver for PanelADCSOFTWARE DRIVERIndependently powers both coordinates of the touch panel to ON or OFFSPI/SSIREFERENCESWikipedia: