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Discovering Computers 2008

1 CSA 111 College of Applied Studies – UOB

Chapter 6

Output

CSA 111 College of Applied Studies – UOB

Chapter 6 Objectives

Describe the four categories of output

Summarize the characteristics of LCD monitors,

LCD screens, and plasma monitors

Describe the characteristics of a CRT monitor and

factors that affect its quality

Explain the relationship between graphics chips

and monitors

Describe various ways to print

Summarize the characteristics of ink-jet printers,

photo printers, laser printers, thermal printers,

mobile printers, label and postage printers,

and plotters and large-format printers

Describe the uses of speakers, headphones,

and earphones

Identify the output characteristics of fax machines

and fax modems, multifunction peripherals, data

projectors, joysticks, wheels, and gamepads

Identify output options for physically

challenged users

Differentiate between a nonimpact printer and an

impact printer

2


What is Output?

What is output?

p. 300 - 301 Fig. 6-1

Data that has been processed into a useful form

Output device is any hardware component that can convey

information to one or more people

3


Display Devices

What is a display device?

p. 302

Output device that visually conveys text,

graphics, and video information

Information on display device sometimes

called soft copy

Monitor houses display device that is packaged

as separate peripheral

4


Display Devices

What is an LCD monitor?

p. 302 - 303 Fig. 6-2

Uses liquid crystal display

Have a small footprint

Mobile devices that contain

LCD displays include

Notebook computer, Tablet

PC, ultra personal

computer, portable media

player, smart phone, and

PDA

5


Flat-Panel Displays

What about using multiple LCD monitors?

p. 303 Fig. 6-3

Some users position

two or more monitors

side-by-side or stacked

Allows users to run

multiple applications

simultaneously

6


Flat-Panel Displays

What are some mobile devices that have LCD screens?

p. 303 Fig. 6-4 7

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Flat-Panel Displays

What is resolution?

p. 304 - 305 Fig. 6-5

Sharpness and

clarity of image

Higher resolution

makes image

sharper, displays

more text on screen,

makes some elements

smaller

Number of horizontal

and vertical pixels in

a display device

8


Flat-Panel Displays

What is a plasma monitor?

p. 307 Fig. 6-8

Displays image by applying voltage to layer of gas

Larger screen size and richer colors than LCD, but are more

expensive

9


Great for game playing, watching movies, and browsing the Internet

HDTV

(high-definition television)

is the most advanced form

of digital TV

Flat-Panel Displays

What is digital television (DTV) and high-definition television (HDTV)?

p. 307

Uses digital signals to produce

crisper, higher-quality output

on LCD and plasma televisions

Many programs can be

broadcast on a single

digital channel

All broadcast stations

transmit digital signals High resolution

10


CRT Monitors

What is a CRT monitor?

p. 308 Fig. 6-10

Contains cathode-ray

tube (CRT)

Screen coated with tiny

dots of phosphor material

Each dot consists of a red,

blue, and green phosphor

Common sizes are 15, 17,

19, 21, and 22 inches

Viewable size is diagonal

measurement of actual

viewing area

11


CRT Monitors

What determines the quality of a CRT monitor?

p. 309

Screen resolution

Refresh rate is speed at which monitor redraws

images on screen

Text created with a smaller dot pitch is easier

to read

12


Printers

What is a printer?

p. 310 Fig. 6-11

Output device that

produces text and

graphics on a physical

medium

Result is hard copy, or

printout

Two orientations: portrait

and landscape

portrait

landscape

13


Speed

Printers

How do you know which printer to buy?

p. 310

Budget Color or

black and white

Cost per page Paper types

and sizes

Graphics and

photo printing Multiple copies

System

compatibility

Depends on printing needs

Wireless

capability Future needs

14


Printers

What are the various ways to print documents and

pictures?

p. 311 Fig. 6-13 15

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Printers

What is a nonimpact printer?

p. 312 Fig. 6-14

Forms characters and graphics without striking paper

Ink-jet printer sprays tiny drops of liquid ink

onto paper

Prints in black-and-white or color on a variety

of paper types

16


Printers

What is the resolution of a printer?

p. 313 Fig. 6-15

Sharpness and clarity

Measured by number of dots per inch (dpi) printer

can output

17


Printers

What is a photo printer?

p. 314 - 315 Fig. 6-17

Color printer that produces

photo-lab-quality pictures

Many photo printers have a

built-in card slot

PictBridge is a standard

technology that allows you to

print pictures directly from a

digital camera

18

Click to view Web Link, click Chapter 6, Click Web Link from left navigation, then click PictBridge below Chapter 6



Printers

What is a laser printer?

p. 315 Fig. 6-18

High-speed, high-quality

nonimpact printer

Prints text and graphics in

high-quality resolution,

ranging from 1,200 to 2,400 dpi

Typically costs more than

ink-jet printer, but is much

faster

19


Printers

What is a thermal printer?

p. 317 Fig. 6-20

Generates images by pushing electrically heated pins

against heat-sensitive paper

Dye-sublimation printer (also called a digital photo printer)

uses heat to transfer dye to specially coated paper

20


Printers

What is a mobile printer?

p. 317 Fig. 6-21

Small, lightweight, battery-powered printer that allows

mobile user to print from notebook computer, Tablet

PC, PDA, or smart phone while traveling

21


Printers

What are label printers and postage printers?

p. 318 Fig. 6-22

Small printer that prints on adhesive-type material

Postage printer has built-in digital scale and prints

postage stamps

Most also print bar codes

22


Printers

What is a plotter?

p. 318 Fig. 6-23

Sophisticated printer used to produce high-quality

drawings

Large-format printer creates photo-realistic-quality

color prints

23


Printers

What is a dot-matrix printer?

p. 318 - 319 Fig. 6-24

Impact printer that produces printed images

when tiny wire pins strike ribbon

Impact printer forms

characters by striking

mechanism against inked

ribbon that contacts paper

24


Printers

What is a line printer?

p. 319 Fig. 6-25

High-speed impact printer that prints entire line at a time

Speed measured in lines per minute (lpm)

Band printer prints fully formed characters using a hammer mechanism

Shuttle-matrix printer is high-speed printer that works like dot-matrix printer

25


Speakers, Headphones, and Headsets

What is an audio output device?

p. 320 - 321 Figs. 6-26 – 6-27

Computer component that produces music, speech, or

other sounds

Speakers and headsets are common devices

26

Click to view Web Link, click Chapter 6, Click Web Link from left navigation, then click PictBridge below Chapter 6



Speakers, Headphones, and Headsets

What is voice output?

p. 321 - 322 Fig. 6-28

Computer talks to you through speakers on computer

Internet telephony allows you to have conversation

over Web

27


Other Output Devices

What is a facsimile (fax) machine?

p. 322 Fig. 6-29

Device that transmits and receives documents over

telephone lines

28



What is a fax modem?

p. 322 Fig. 6-30

Modem that allows you to send and receive electronic

documents as faxes external fax

modem

internal fax card

in system unit

fax machine

29

Click to view Web Link, click Chapter 6, Click Web Link from left navigation, then click Fax Modems below Chapter 6




What is a multifunction peripheral?

p. 323 Fig. 6-31

Provides functionality

of printer, scanner,

copy machine, and

fax machine

30

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What is a data projector?

p. 323 Fig. 6-32

Device that takes text

and images from

computer screen and

projects them onto

larger screen

31



What is force feedback?

p. 324 Fig. 6-33

Sends resistance to device in response to actions of user

32

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Putting It All Together

What are suggested output devices for the home user?

p. 325 Fig. 6-34

Monitor Printer Other

17- or 19-inch

LCD monitor

Ink-jet color

printer; or

Photo printer

Speakers

Headset

Force-feedback

joystick, wheel,

and/or gamepad

User

33



What are suggested output devices for the small office/home office user?

p. 325 Fig. 6-34

19- or 21-inch

LCD monitor

Color LCD

screen on Tablet

PC, PDA, or

smart phone

Multifunction

peripheral; or

Ink-jet color

printer; or

Laser printer

(black-and-

white or color)

Label printer

Postage printer

Fax machine

Speakers

Monitor Printer Other User

34



What are suggested output devices for the mobile user?

p. 325 Fig. 6-34

17-inch color

LCD screen on

notebook

computer

LCD screen on

Tablet PC, PDA,

or smart phone

Mobile color

printer

Ink-jet color

printer; or

Laser printer for

in-office use

(black-and-

white or color)

Photo printer

Fax modem

Headphones or

earphones

DLP data

projector


35



What are suggested output devices for the power user?

p. 325 Fig. 6-34

23-inch LCD

monitor

Laser printer

(black-and-

white or color)

Plotter or large-

format printer;

or

Photo printer; or

Dye-sublimation

printer

Fax machine or

fax modem

Speakers

Headphones or

earphones


36



What are suggested output devices for the large business user?

p. 325 Fig. 6-34

High-speed laser

printer

Laser printer,

color

Line printer (for

large reports

from a

mainframe)

Label printer

Fax machine or

fax modem

Speakers

Headphones or

earphones

DLP data

projector

Monitor Printer Other

19- or 21-inch

LCD monitor

LCD screen on

Tablet PC, PDA,

or smart phone

User

37


Output Devices for Physically Challenged Users

What is the Magnifier?

p. 326 Fig. 6-35

Windows Magnifier

enlarges text and

other items on

screen

38


Output Devices for Physically Challenged Users

What other output options are available for visually impaired users?

p. 326 Fig. 6-36

Change Window settings,

such as increasing size or

changing color of text to

make words easier to read

Blind users can work with

Windows Vista’s Narrator

Braille printer outputs

information in Braille

onto paper

39

Chapter 6 Complete

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