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Chapter 2
Understanding Output Devices
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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
Discovering Computers 2012: Chapter 6 6Pages 306207
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
Discovering Computers 2012: Chapter 6 9Pages 308309
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
Discovering Computers 2012: Chapter 6 10Page 310
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
Discovering Computers 2012: Chapter 6 11Page 311
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
Discovering Computers 2012: Chapter 6 12Page 312
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.wmv8/13/2019 Chapter+2 6Output (1)
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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
Discovering Computers 2012: Chapter 6 14Page 313
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
Discovering Computers 2012: Chapter 6 15Page 313
Figure 6-11
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Printers
Discovering Computers 2012: Chapter 6 16Page 314
Figure 6-12
Before purchasing a printer, ask yourself a series of questions:
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Printers
Discovering Computers 2012: Chapter 6 17Page 315
Figure 6-13
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Printer
Non-impact
printer
Slide # 19
Ink-jet
printerImpact
printer
Dot-matrix
printerline printer
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Printers
A nonimpact printerforms characters and
graphics on a piece of paper without actually
striking the paper
Discovering Computers 2012: Chapter 6 19Page 315
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
Discovering Computers 2012: Chapter 6 21Page 318
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Printers
Laser
printer
High-speed
High-
quality
Color
Black-
and-
white
Discovering Computers 2012: Chapter 6 22Pages 319 - 320
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Printers
A thermal printergenerates images by pushing
electrically heated pins against the heat-sensitive
paper
Discovering Computers 2012: Chapter 6 24Page 321
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
Discovering Computers 2012: Chapter 6 25Page 321
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
Discovering Computers 2012: Chapter 6 26Page 322
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
Discovering Computers 2012: Chapter 6 27Page 322
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
Discovering Computers 2012: Chapter 6 28Pages 322 - 323
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
Discovering Computers 2012: Chapter 6 29Page 323
Figure 6-25
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Speakers, Headphones, and Earbuds
An audio output deviceproduces music, speech,
or other sounds
Discovering Computers 2012: Chapter 6 30Page 323
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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Speakers, Headphones, and Earbuds
Headphonesare
speakers that cover or
are placed outside of
the ear Earbuds(also called
earphones) rest inside
the ear canal
Discovering Computers 2012: Chapter 6 31Page 324
Figure 6-27
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Speakers, Headphones, and Earbuds
Some speakers are specifically designed to play
audio from a portable media player
Wireless speakers
Discovering Computers 2012: Chapter 6 32Page 324
Figure 6-28
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Speakers, Headphones, and Earbuds
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
Discovering Computers 2012: Chapter 6 34Page 325
Data projectorsInteractive
whiteboards
Force-feedback
game
controllers
Tactile output
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Other Output Devices
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
Discovering Computers 2012: Chapter 6 35Pages 325 - 326
Figure 6-29
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Other Output Devices
An interactive whiteboard is a touch-sensitive
device, resembling a dry-erase board, that
displays the image on a connected computer
screen
Discovering Computers 2012: Chapter 6 36Page 326
Figure 6-30
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Other Output Devices
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
Discovering Computers 2012: Chapter 6 37Pages 326327
Figure 6-31
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Putting It All Together
Discovering Computers 2012: Chapter 6 38Page 327
Figure 6-32
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Putting It All Together
Discovering Computers 2012: Chapter 6 39Page 327
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
Discovering Computers 2012: Chapter 6 41Pages 328 - 329
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
Discovering Computers 2012: Chapter 6 42Page 329
Chapter 6
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Your Interactive Guideto the Digital World
Discovering
Computers 2012
Chapter 6
Understanding Output