21138453 Touch Screen Technology

8/2/2019 21138453 Touch Screen Technology

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What Are Touch screens Used For?

Public Information Displays

Retail and Restaurant Systems

Customer Self-Service Control and Automation Systems

Computer Based Training

Assistive Technology


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I. History

-1971the first "touch sensor" was developed

by Doctor Sam Hurst (founder

of Elographics) called Elograph.


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I. History

-1974

the first true touch screen

incorporating a transparent curved

glass sensor surface came on the

scene developed by Sam Hurst andElographics.

-1977Elographics developed & patented

five-wire resistive technology, called

AccuTouch.


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I. History

-1987

new technology were

purchased. The surface

acoustic wave product, named

IntelliTouch.

-1994

the company officially changed

its name from Elographics to

Elo TouchSystems.


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II. Types

4-Wire Resistive Touchscreens-consists of a glass or acrylic panel that iscoated with electrically conductive andresistive layers. The thin layers are

separated by invisible separator dots.Advantages-High touch resolution

-Pressure sensitive, works with any stylus

-Not affected by dirt, dust, water, or light

- Costs are relatively low when compared with active touch

screen technologies.Disadvantages

-75 % clarity

-Resistive layers can be damaged by a sharp object

-Less durable then 5-Wire Resistive technology
http://www.touchscreens.com/intro-touchtypes-4resistive.htmlhttp://www.touchscreens.com/intro-touchtypes-4resistive.htmlhttp://www.touchscreens.com/intro-touchtypes-4resistive.htmlhttp://www.touchscreens.com/intro-touchtypes-4resistive.htmlhttp://www.touchscreens.com/intro-touchtypes-4resistive.html


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II. Types

5-Wire Resistive Touchscreens

- better version of 4-Wire Resistive

technology.

Advantages

-High touch resolution



- More durable than 4-Wire Resistive technology

Disadvantages-75 % clarity

-Resistive layers can be damaged by a sharp object

-much expensive than 4-Wire Resistive technology
http://www.touchscreens.com/intro-touchtypes-resistive.htmlhttp://www.touchscreens.com/intro-touchtypes-resistive.htmlhttp://www.touchscreens.com/intro-touchtypes-resistive.htmlhttp://www.touchscreens.com/intro-touchtypes-resistive.htmlhttp://www.touchscreens.com/intro-touchtypes-resistive.html


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II. Types

Capacitive Touchscreens

-consists of a glass panel with acapacitive (charge storing) material

coating its surface.

Advantages




Disadvantages

-Must be touched by finger, will not work with any

non-conductive input
http://www.touchscreens.com/intro-touchtypes-capacitive.htmlhttp://www.touchscreens.com/intro-touchtypes-capacitive.htmlhttp://www.touchscreens.com/intro-touchtypes-capacitive.html


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II. Types

PenTouch CapacitiveTouchscreens-is a durable Capacitive type touch screen withan attached pen stylus. It can be set to respond

to finger input only, pen input only, or both.

Advantages




Attached pen stylus for precise inputDisadvantages

- Must be touched by finger or attached pen stylus,

will not work with any non-conductive input
http://www.touchscreens.com/intro-touchtypes-pentouch.htmlhttp://www.touchscreens.com/intro-touchtypes-pentouch.htmlhttp://www.touchscreens.com/intro-touchtypes-pentouch.htmlhttp://www.touchscreens.com/intro-touchtypes-pentouch.htmlhttp://www.touchscreens.com/intro-touchtypes-pentouch.htmlhttp://www.touchscreens.com/intro-touchtypes-pentouch.html


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II. Types

Surface Acoustic Wave Touchscreens-is one of the most advanced touch screen types. Itis based on sending acoustic waves across a clearglass panel with a series of transducers andreflectors. When a finger touches the screen, thewaves are absorbed, causing a touch event to bedetected at that point.

Advantages


-Highest image clarity

- All glass panel, no coatings or layers that can wear out or

damage.Disadvantages

- Must be touched by finger, gloved hand, or soft-tip stylus.

Something hard like a pen won't work

- Not completely sealable, can be affected by large amounts

of dirt, dust, and / or water in the environment.
http://www.touchscreens.com/intro-touchtypes-saw.htmlhttp://www.touchscreens.com/intro-touchtypes-saw.htmlhttp://www.touchscreens.com/intro-touchtypes-saw.htmlhttp://www.touchscreens.com/intro-touchtypes-saw.html


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III. How It Works


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III. How It Works


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III. How It Works


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III. How It Works


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IV. References

http://en.wikipedia.org/wiki/Touch_screen

http://www.edufive.com/seminartopics/computer/CS35.html

http://www.ehow.com/about_5436883_history-

touchscreens.html?ref=fuel&utm_source=yahoo&utm_medium=ssp&utm_campaig

n=yssp_art

http://bugclub.org/beginners/history/TouchScreen.html

http://electronics.howstuffworks.com/iphone1.htm

http://inventors.about.com/gi/dynamic/offsite.htm?site=http://www.touchscreens.

com/compare.shtml

http://inventors.about.com/gi/dynamic/offsite.htm?site=http://www.touchscreens.

com/uses.shtml

21138453 Touch Screen Technology

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