TOUCH SCREEN TECHNOLOGY

By G.V.S.Bharadwaj

12761A0522`

Overview Introduction History Components Types of display Examples Pros & cons Applications Market Future Closing

Thoughts

INTRODUCTION TO TOUCH TECHNOLOGY

• A touch screen is a computer display screen that is sensitive to human touch, allowing a user to interact with the computer by touching pictures or words on the screen.

• Touch screen technology can be used as an alternative user interface with applications that normally require a mouse, such as a Web browser.

• Touch screen can also sense other passive objects such as stylus.

HistoryTouch screens emerged

from academic and corporate research labs

In 1971, the first

"Touch Sensor" was developed by Doctor Sam Hurst (founder of Elographics) while he was an instructor at the University of Kentucky.

First Touch Phone

Apple was the first with a touch screen phone in 1983. Jason Ford of Elo Touch Systems, the company whose founder invented touch screen technology, for providing the touch technology. In 1971, the first "touch sensor" was developed by Doctor Sam Hurst.

First Touch Mobile The Nokia 7710 is a first touch

screen mobile phone model produced by Nokia. The 7710 is based on the Nokia 7700 which was never released. It is Nokia's first, and so far only smart phone to run the Series 90 GUI a top the Symbian OS.

Components

1. Touch Sensor

2. Controller

3. Software Driver

1. Touch sensor

Typically a glass panel with a touch-responsive surface

2. Controller

A small PC card which translates

information that PC can understand.

It’s a program that allows communication between OS and controller

3. Software Driver

Types of Touch Screen Displays

1.Capacitive Touch screens: A capacitive touch screen consists of two spaced layers

of glass, which are coated with conductor such as Indium Tin Oxide (ITO).

Advantages:• Supports Multi touch and does not need any stylus.• Made of glass instead of plastic, so looks sharper and

brighter.

Disadvantages:• Because the technology is dependent on the

conductive nature of human body, it doesn’t work if the user is wearing gloves.

• Because of having a complex structure, these are quite expensive.

• Glass is more prone to breaking.

2.Resistive Touch screens:

A resistive touch screen comprises of several layers, out of which the flexible plastic and glass layers are two important electrically resistive layers. The front surface of resistive touch screen panel is a scratch-resistant plastic with coating of a conductive material (mostly Indium Tin Oxide)The second important layer is either made of glass or hard plastic and is also coated with ITO.Advantages:•High resistance to dust and water•Best used with a finger, gloved hand or stylus.Disadvantages:•Not too sensitive, you have to press down harder•Does not support multi-touch

Touch Scree

n Table

Touch Screen Window

s

PROS User friendly Fast response Error free input Does not interfere mouse and

keyboard Make computing easy , powerful and fun Easy to install Compatible with Windows,

Macintosh and Linux. It benefits children

CONS: Finger stress The Screen gets dirty from

Fingerprints. Screen has to be really big not

to miss things when pressing them with your finger

Big screen leads to low battery life

These devices are more expensive than alternate devices

Fatigue Electric shocks on touching the

devices with wet hands

Applications

•ATM Machines•Gas and fuel stations•Museums•Library resource guides•Corporate information •Airport terminal passenger internet and emails•Restaurant systems•Grocery stores•And many more uses……

FUTURE

If we're among those who think that touch screen phones are only available on high-end devices, think again! Gartner Inc estimated that the global market for touch screen mobiles has increased from 11.7% to 12.7% in the 1st quarter of 2013. The market share for touch screen was about US$14bn and expected to be triple in the next decade in 2012. By 2013, touch screen mobiles will account for 58 per cent of all global mobile sales, and more than 80 per cent in high-end markets, such as North America and Western Europe.

Though the touch screen technology contains some limitations it’s very user friendly, fast, accurate, easy for the novices & fun to operate. It has been widely accepted. And now by just modifying a little it can replace the mouse and key board completely in near future.

CLOSING THOUGHTS