1. Touch Screen Technology By: Rebecca Lukito

2. Two Main Touch Screen Systems  Resistive  Capacitive

3. Resistive System  Consists of a glass panel with two layers, conductive and resistive metallic layers  Electrical current runs between both layers when operational  The two layers make contact when touched, sending coordinates to the driver

4. Resistive System http://www.computerworld.com/s/article/9231961/How_it_works_The_technology_of_touch _screens?taxonomyId=12&pageNumber=1

5. Resistive System  Examples: - PalmPilot PDAs -Certain GPS systems

6. Capacitive System OOOOne layer that stores electrical charges on the panel WWWWhen touched with a finger, the electrical charge is transferred to user CCCComputer then coordinates where touch took place

7. Capacitive System http://www.computerworld.com/s/article/9231961/How_it_works_The_technology_of_touch_scr eens?taxonomyId=12&pageNumber=3

8. Capacitive System  Examples: - Ipods, Ipads, Iphones etc…

9. What can trigger the screen? ~ Resistive - Anything from a finger to a pen ~ Capacitive - Only things with a conductive input

10. PriceClarity Damage Resistance ResistiveCheapest Low Clarity Easiest to damage with sharp objects Capacitive More expensive High Clarity Less prone to damage by sharp objects

11. References  "How Do Touch-screen Monitors Know Where You're Touching?" HowStuffWorks. N.p., n.d. Web. 10 Nov. 2012..  "How It Works: The Technology of Touch Screens." Computerworld. N.p., n.d. Web. 10 Nov. 2012..  "Who Invented Touch Screen Technology?" About.com Inventors. N.p., n.d. Web. 10 Nov. 2012..