HOW TOUCH SCREEN WORKS

Hai Guys..!!

A survey is done in usage of mobile phones in Human being.It freaks!!! normaly people use their smartphone 120minutes a day.Nowdays smartphones are more affordable for all.We can see peoples like they will be without food for a day,they cant be without Smartphones.

I have doubt regarding how the touchscreen of smart-phones works.Many people are googling it.But cant get revalent information.Inorder to make others to know about Working of TOUCHSCREENs,I am making a post.

There are more touch screen techonology like RESISTIVE,SURFACE CAPACITIVE,ACUOSTICS,OPTICAL IMAGING etc.

The most commonly used touchscreens in mobile phone are

                                                                     * RESISTIVE

                                                                     * SURFACE CAPACITIVE 

*  RESISTIVE-SCREEN

            -In this screen if we touch the screen its hard to work,we can feel the touch,touches har

            -There are two layer is in this touchscreen

                         * Conductive layer

                         * Resistive layer

             -This two layers are separeted by a tiny DOTS called as SPACERS

             - Conductive layer is connected to power supply.

    WORKING

         -When we touch the resistive layer its get contacted(touch) with conductive layer,On the touch part the             corresponding program will be runing.

         - This touches are done in X-Y planes.

         -It uses ambient light which means light around the display.

CAPACITIVE SCREENS

            -Capacitives touches are soft handled.We should not put stress like resistive.

            -Capacitives screens are made up of COPPER,INDIUM TIN OXIDE,in which they store electric charges in electro-static fashion.

             -It consits of three layers

                                         * GLASS SUBSTRATE

                                         * CONDUCTIVE LAYER

                                         *  PROTECTION LAYER

            -This layer are connected by electrode in corners.

            -This layers are connected to a controller.

WORKING

          - Electrode provides a electric voltage to the conductive layer in uniform electric-field.

          - When a finger touches the screen,a tiny electric charges produces,create a voltage drop at touched area.The location of the voltage drop are calculated in controller in X-Y plane.It makes the app to run.

THIS HOW TOUCH SCREEN WORKS.