Sunil dahal1


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Touch Screen Technology

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Sunil dahal1

  1. 1. Sunil dahalBsc IT 1Sem (D)123151725
  2. 2. IntroductionHistoryFunctionsWorkingTypesUSESConclusion
  3. 3. 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.
  4. 4.  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.
  5. 5.  Pressure sensitive activation-by finger or stylus.Touch screen & mouse can be used concurrently Emulates mouse function –click, double click, & drag.
  6. 6. 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
  7. 7. 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
  8. 8. 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.
  9. 9.  Public Information DisplayTourism Displays, Trade Show Display.  Customer Self-Service Store, Restaurants, Transportation, Atm etc
  10. 10.  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.