INTRODUCTION A touch screen is a display that can detect the presence and location of a touch within the display area. Touch screen can also sense other passive objects such as stylus. A touch screen accepts direct onscreen inputs. A touch screen is an input device that allows users to operate a PC by simply touching the display screen which has a sensitive glass overlay placed on it.
According to the Google “Touch Sensor was developed byDr. Sam Hurst (founder of Elographic) in 1971”. Touch screens emerged from academic and corporateresearch labs, In 1974, the first true touch screen was lunch.
Pressure sensitive activation-by finger or stylus.Touch screen & mouse can be used concurrently Emulates mouse function –click, double click, & drag.
A basic touch Screen has three main components: Touch Sensor A touch screen sensor is a clear glass panel with a touch responsive surface which is place over a display screen Controller It is a small PC card which connects between the touch sensor and the PC. Software Driver The driver is a software that allows the touch screen and computer to work together
TYPESManly there are three (3) types of touch screen. There are two layers which have a small gap in between and when you applypressure to the screen a contact is created by the top layer touching thebottom layer Not sensitive Example of Resistive LG Otimus, Nokia 900 etc. It has a constant voltage and when the glass front of thetouch screen is touched it creates an electrostatic field and screen reacts by sending the information to the touch controller Capacitive touch screens provide a high-qualitycontrol experience, because they work with a widerange of finger pressure, and are sensitive tomulti-touch inputs. More durable then resistive
Example of Capacitive Apple iphone, Samsung Galaxy etc. It works with small infra red LED’ s mounted around the outeredges of the glass front and basically divides the surface of thescreen into small squares, making it extremely accurate. Youcan also use a stylus or have gloves on to make this work as itdoes not require a conductor, your finger, to make it work. Highest quality of underlying image. Very high durability and reliability. Lower resolution than other technologies.
Public Information DisplayTourism Displays, Trade Show Display. Customer Self-Service Store, Restaurants, Transportation, Atm etc
Touch screen, touch panels or touch screen panels are display overlays which havethe ability to display and receive information on the same screen Touch screen also have assisted in recent change in the PDAs, making these devices more usable.