Today’s innovative technologies are countless. After the introduction of Touch screens in the technology era, it has replaced the conventional methods of screen displays and controls. Touch screens, or touch screen panels are display overlays which have the ability to display and receive information on the same screen. The effect of such overlays allows a 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. In simply, the screen’s control is by touching the menus or buttons on the screen to input or display the required output. This technology has also been used in applications of Graphical user interface (GUI) and entering data. Multi Touch screens also one among the touch screen technology for inputting two or more inputs at simultaneously.
The different types of touch screen technologies are Capacitive Touch screen Technology, Resistive Touch screen Technology, Infrared (IR) Touch screen Technology and so on.
The current applications of touch screen technology are ATM, Smart phones, PDA devices, Portable game consoles, Projector screens and so on. These screens are also popular in Museum displays, Room automation where as the keyboards and mice do not allow a satisfactory, intuitive, rapid, or accurate interaction by the user with the display's content.