Touch Screen Technology By: Rebecca Lukito

Two Main Touch Screen Systems  Resistive  Capacitive

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

Resistive System _screens?taxonomyId=12&pageNumber=1

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

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

Capacitive System eens?taxonomyId=12&pageNumber=3

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

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

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

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