Chapter+2 6Output (1)

8/13/2019 Chapter+2 6Output (1)

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Chapter 2

Understanding Output Devices

Discovering Computers 2012: Chapter 2-6 1


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Objectives Overview

Describe the types of

output

Explain the

characteristics of

various displaydevices

Describe the factors

that affect the quality

of an LCD monitor orLCD screen

Describe variousways to print

Differentiate

between anonimpact printer

and an impact printer

Discovering Computers 2012: Chapter 6 2See Page 303

for Detailed Objectives


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Objectives Overview

Summarize the characteristics of

ink-jet printers, photo printers,laser printers, multifunction

peripherals, thermal printers,mobile printers, label and

postage printers, and plottersand large-format printers

Describe the uses and

characteristics of speakers,

headphones, and earbuds

Identify the purpose and

features of data projectors,interactive whiteboards, and

force-feedback game controllersand tactile output

Identify output options for

physically challenged users

Discovering Computers 2012: Chapter 6 3See Page 303

for Detailed Objectives


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What Is Output?

Outputis data that has been processed into a

useful form

Discovering Computers 2012: Chapter 6 4Pages 304305

Figure 6-1


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What Is Output?

An output deviceis any type of hardware

component that conveys information to one or

more people

Discovering Computers 2012: Chapter 6 5Page 305

Display devices Printers

Speakers,

headphones,

and earbuds

Data projectors

Interactive

whiteboards

Force-feedbackgame

controllers

Tactile output


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Display Devices

A display devicevisually

conveys text, graphics,

and video information

A monitoris packagedas a separate peripheral

LCD monitor

Widescreen


Figures 6-26-3


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Display Devices

Liquid crystal display (LCD) uses a liquid

compound to present information on a display

device



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Display Devices

The quality of an LCD monitor or LCD screen

depends primarily on:

Discovering Computers 2012: Chapter 6 8Pages 308 - 310

Resolution Response time Brightness

Dot pitch Contrast ratio


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Display Devices

Resolutionis the

number of

horizontal and

vertical pixels in adisplay device

A higher

resolution uses a

greater number ofpixels


Figure 6-5


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Display Devices

The graphics processing unit (GPU) controls the

manipulation and display of graphics on a display device

LCD monitors use a digital signal and should plug into a

DVI port, an HDMI port, or a DisplayPort


Figure 6-6


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Display Devices

Plasma monitorsare display devices that use gas

plasma technology and offer screen sizes up to

150 inches


Figure 6-8


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Display Devices

Televisions also are agood output device

Require a converter if youare connecting your

computer to an analogtelevision

Digital television (DTV)offers a crisper, higher-quality output

HDTVis the mostadvanced form of digitaltelevision


Figure 6-9


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Video: SID: Size Matters

Discovering Computers 2012: Chapter 6 13

CLICK TO START
http://localhost/var/www/apps/conversion/tmp/scratch_7/06_sidfloor.wmvhttp://localhost/var/www/apps/conversion/tmp/scratch_7/06_sidfloor.wmvhttp://localhost/var/www/apps/conversion/tmp/scratch_7/06_sidfloor.wmv


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Display Devices

A CRT monitoris a desktop monitor that contains

a cathode-ray tube

Have a much larger footprint than do LCD monitors


Figure 6-10


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Printers

A printerproduces

text and graphics on

a physical medium

Printed information

is called a hard copy,

or printout

Landscape or portraitorientation


Figure 6-11


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Printers


Figure 6-12

Before purchasing a printer, ask yourself a series of questions:


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Printers


Figure 6-13


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Printer

Non-impact

printer

Slide # 19

Ink-jet

printerImpact

printer

Dot-matrix

printerline printer

Discovering Computers 2012: Chapter 6 18


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Printers

A nonimpact printerforms characters and

graphics on a piece of paper without actually

striking the paper


Ink-jet

printers

Photo

printers

Laser

printers

Thermal

printers

Mobile

printers

Label and

postage

printers

Plotters

Large-

format

printers


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Printers

A photo printerproduces color

photo-lab-quality pictures

Most use ink-jet technology

PictBridge allows you to print photos

directly from a digital camera Print from a memory card and preview

photos on a built-in LCD screen



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Printers

Laser

printer

High-speed

High-

quality

Color

Black-

and-

white



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Printers

A thermal printergenerates images by pushing

electrically heated pins against the heat-sensitive

paper


Figure 6-21

Thermal wax-transfer

printer

Dye-sublimation

printer


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Printers

A mobile printeris a

small, lightweight,

battery-powered printer

that allows a mobileuser to print from a

notebook computer,

smart phone, or other

mobile device


Figure 6-22


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Printers

A label printeris a small printer that prints on

adhesive-type material

A postage printer prints postage stamps

Postage also can be printed on other types of printers


Figure 6-23


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Printers

Plottersare used to produce high-quality

drawings

Large-format printerscreate photo-realistic

quality color prints on a larger scale


Figure 6-24


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Printers

Impact printersform characters and graphics on a

piece of paper by striking a mechanism against an

inked ribbon that physically contacts the paper


Dot-matrix

printer

Line

printer


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Printers

A dot-matrix printer

produces printed

images when tiny wire

pins on a print headmechanism strike an

inked ribbon

A line printerprints an

entire line at a time


Figure 6-25


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Speakers, Headphones, and Earbuds

An audio output deviceproduces music, speech,

or other sounds


Figure 6-26

Most computer users attach

speakersto their computers to:

Generate higher-quality sounds for playing

games

Interact with multimedia presentations Listen to music

View movies


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Headphonesare

speakers that cover or

are placed outside of

the ear Earbuds(also called

earphones) rest inside

the ear canal


Figure 6-27


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Some speakers are specifically designed to play

audio from a portable media player

Wireless speakers


Figure 6-28


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Voice outputoccurs when you hear a

persons voice or when the computer

talks to you through the speakers

Some Web sites dedicate themselves to

providing voice output Often works with voice input

VoIP uses voice output and voice input



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Other Output Devices

Other output devices are available for specific

uses and applications


Data projectorsInteractive

whiteboards

Force-feedback

game

controllers

Tactile output


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A data projector is a

device that takes the

text and images

displaying on acomputer screen and

projects them on a

larger screen

LCD projector

Digital light processing

(DLP) projector


Figure 6-29


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An interactive whiteboard is a touch-sensitive

device, resembling a dry-erase board, that

displays the image on a connected computer

screen


Figure 6-30


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Force-feedback sends

resistance to the device

in response to actions

of the user Tactile output provides

the user with a physical

response from the

device


Figure 6-31


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Putting It All Together


Figure 6-32


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Putting It All Together


Figure 6-32


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O D i


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Output Devices

for Physically Challenged Users

Many accessibility options exist for users with

various disabilities


Figures 6-336-34


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Summary

Various methods of outputSeveral commonly used

output devices

Display devices, printers,

speakers, headphones,

earbuds, data projectors,

interactive whiteboards,

force-feedback game

controllers, and tactile output


Chapter 6


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Your Interactive Guideto the Digital World

Discovering

Computers 2012

Chapter 6

Understanding Output

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Chapter+2 6Output (1)

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