Touch Screen TechnologyTouch Screen TechnologyBy: Rebecca LukitoBy: Rebecca Lukito

Two Main Touch Screen SystemsTwo Main Touch Screen Systems

ResistiveResistive

CapacitiveCapacitive

Resistive SystemResistive System

Consists of a glass panel with two layers, Consists of a glass panel with two layers, conductive and resistive metallic layersconductive and resistive metallic layers

Electrical current runs between both layers Electrical current runs between both layers when operationalwhen operational

The two layers make contact when The two layers make contact when touched, sending coordinates to the drivertouched, sending coordinates to the driver

Resistive SystemResistive System

http://www.computerworld.com/s/article/9231961/How_it_works_The_technology_of_touch_screens?taxonomyId=12&pageNumber=1

Resistive SystemResistive System

Examples:Examples:- PalmPilot PDAs- PalmPilot PDAs

-Certain GPS systems -Certain GPS systems

Capacitive SystemCapacitive System

One layer that stores electrical charges on One layer that stores electrical charges on the panel the panel

When touched with a finger, the electrical When touched with a finger, the electrical charge is transferred to usercharge is transferred to user

Computer then coordinates where touch Computer then coordinates where touch took place took place

Capacitive SystemCapacitive System

http://www.computerworld.com/s/article/9231961/How_it_works_The_technology_of_touch_screens?taxonomyId=12&pageNumber=3

Capacitive SystemCapacitive System

Examples:Examples:

- Ipods, Ipads, Iphones etc…- Ipods, Ipads, Iphones etc…

What can trigger the screen? What can trigger the screen?

~ Resistive~ Resistive

- Anything from a finger to a pen - Anything from a finger to a pen

~ Capacitive~ Capacitive

- Only things with a conductive - Only things with a conductive

inputinput

PricePrice ClarityClarity Damage Damage Resistance Resistance

ResistiveResistive CheapestCheapest Low ClarityLow Clarity Easiest to Easiest to damage with damage with sharp objectssharp objects

CapacitiveCapacitive More More expensiveexpensive

High ClarityHigh Clarity Less prone to Less prone to damage by damage by sharp objectssharp objects

ReferencesReferences "How Do Touch-screen Monitors Know Where You're "How Do Touch-screen Monitors Know Where You're

Touching?" Touching?" HowStuffWorksHowStuffWorks. N.p., n.d. Web. 10 Nov. . N.p., n.d. Web. 10 Nov. 2012. 2012. <http://computer.howstuffworks.com/question716.htm>. <http://computer.howstuffworks.com/question716.htm>.

"How It Works: The Technology of Touch Screens." "How It Works: The Technology of Touch Screens." ComputerworldComputerworld. N.p., n.d. Web. 10 Nov. 2012. . N.p., n.d. Web. 10 Nov. 2012. <http://www.computerworld.com/s/article/9231961/How_i<http://www.computerworld.com/s/article/9231961/How_it_works_The_technology_of_touch_screens?t_works_The_technology_of_touch_screens?taxonomyId=12>. taxonomyId=12>.

"Who Invented Touch Screen Technology?" "Who Invented Touch Screen Technology?" About.com About.com InventorsInventors. N.p., n.d. Web. 10 Nov. 2012. . N.p., n.d. Web. 10 Nov. 2012. <http://inventors.about.com/od/tstartinventions/a/Touch-<http://inventors.about.com/od/tstartinventions/a/Touch-Screen.htm>. Screen.htm>.