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TOUCH SCREEN TECHNOLOGY

CONTENTS:

DEFINITION

HISTORY

COMPONENTS

DIFFERENT TYPES ADVANTAGES AND DIS ADVANTAGES

CONCLUSION

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• Touchscreen is an electronic visual display that the user can

control through simple or multi-touch gestures by touching

the screen with one or more fingers.

• Some touchscreens can also detect objects such as

a stylus or ordinary or specially coated gloves. The user can

use the touchscreen to react to what is displayed and to

control how it is displayed (for example by zooming the text

size)……………

TOUCH SCREEN

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History:In 1971 the first touch screen sensor was

developed by DR: SAM HURST while he was an instructor at the university of kentucy.

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Components Involved…….

---Three components

The touch sensor is a panel with a touch responsive surface. Systems are

built based on different types of sensors: resistive (most common), surface

acoustic wave, and capacitive (most smart phones).

The controller converts the voltage changes on the sensor into signals of

the computer

Components Involved…….

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Software tells the computer, smartphone, game device, etc, what's

happening on the sensor and the information coming from the

controller. Who's touching what , where , and allows the computer or

smart phone to react accordingly.

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In 2002, Microsoft introduced the Windows XP Tablet edition and started

its entry into touch technology. However, you could say that the increase

in the popularity of touch screen smart phones defined the 2000s. In 2007,

Apple introduced the king of smart phones, the iPhone, with nothing but

touch screen technology.

V/S

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Microsoft - Apple

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Types of Touch Screens…………..

Resistive touch screen

Capacitive touch screen

Surface acoustic touch screen

Multi touch screen

Infrared touch screen

Dual touch screen

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Resistive Touch screenThis type of touch screen is made up of three sheets;

conductive

resistive

protective layerer

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Advantages of Resistive Touch Screen

It has comparatively longer life.

It is used in many different ways.

It is a very common type of touch screen.

It is cheap and so approachable.

Disadvantages of Resistive Touch Screen

It emits less light as 75 % so fails to give sharp image.

Its appearance is bulky.

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Advantages of Capactive Touch Screen

It emits 90% of light ray to make screen clear.

It has long life .

Disadvantages of Capactive Touch Screen

They are sensitive only for the fingers touch no other object like stylus can be

sensed

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Surface acoustic Wave Touch screen

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This is the more advanced types of touch screen. They are fast and have sharp

image. In this touch screen three sheets are used to perform the action;

Sending transducer

Receiving transducer

Reflectors layer

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Sound emitterSound receiver

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Advantages of surface acoustic wave touch screen

Because of this wave mechanism versatile action can be done.

Being no electric field created, it emits 100% light resultantly quality image

received.

Disadvantages of surface acoustic wave touch screen

They tend to have very short life.

They are expensive so out of reach of a common man.

They can be easily damaged

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ANY QUESTIONS

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