Transcript Chapter 5 Input and Output - 61 slides - 1

Chapter 5
Input and Output
- 61 slides -
1
Chapter 5 Objectives
List the characteristics
of a keyboard
Summarize how
these pointing devices
work: mouse, trackball, touchpad,
pointing stick, joystick, wheel, audio
player, control pad, gamepad, light
pen, touch screen, stylus, and digital
pen
Describe other types of input,
including voice input; input devices
for PDAs, smart phones, and Tablet
PCs; digital cameras; voice input;
scanners and reading devices;
terminals; and biometric input
Describe the characteristics of LCD
monitors, LCD screens, and CRT
monitors
Summarize the various types of printers
Explain the characteristics of
speakers, headphones and earphones;
fax machines and fax modems,
multifunction peripherals, and data
projectors
Identify input and output options for
physically challenged users
Next
2
What Is Input?
What is input?

Data or instructions entered into the memory of
computer

Input device is any hardware component used to
enter data or instructions into a computer
p. 166 - 167 Fig. 5-1
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3
Keyboard and Pointing Devices
What is a keyboard?

Input device that contains
keys users press to enter
data into a computer

Includes typing area,
numeric keypad, and
function keys
Can be cordless or
built-in

p. 168 Fig. 5-2
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4
Keyboard and Pointing Devices
What is a mouse?

Pointing device that fits under the palm of your hand


Pointing device controls
movement of pointer, also
called the pointer
mouse buttons
wheel
button
Mechanical mouse
has rubber or metal
ball on its underside
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Mouse
below Chapter 5
p. 169 Fig. 5-3a
ball
mouse pad
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5
Keyboard and Pointing Devices
What is an optical mouse?




No moving mechanical
parts inside
Senses light to detect
mouse’s movement
More precise than
mechanical mouse
More expensive
than a
mechanical mouse
p. 169 Fig. 5-3b
Next
6
Video: Alternatives to Your Boring Mouse
Beyond the mouse; cool alternatives to mousing around
low quality
(click to start)
high quality
(click to start)
Next
7
Keyboard and Pointing Devices
What is a trackball?


Stationary pointing device
with a ball on its top or side
To move pointer, rotate ball
with thumb, fingers, or palm
of hand
p. 170 Fig. 5-4
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8
Keyboard and Pointing Devices
What are a touchpad and a
pointing stick?


Touchpad is small, flat,
rectangular pointing device
sensitive to pressure and motion
Pointing stick is pointing device
shaped like pencil eraser
positioned between keys on
keyboard
p. 170 Figs. 5-5—5-6
Next
9
Keyboard and Pointing Devices
What are a joystick and a wheel?


Joystick is vertical lever mounted on a base
Wheel is steering-wheel-type input device

p. 171 Fig. 5-7
Pedal simulates
car brakes and accelerator
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10
Other Pointing Devices
What is a control pad and a gamepad?


Control pad on an audio
player allows users to
scroll through music,
adjust volume, and
customize settings
Gamepad a pointing
device that controls the
movement and actions of
players or objects in
games
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click iPod Click Wheel
below Chapter 5
p. 171 Fig. 5-8
11
Keyboard and Pointing Devices
What is a light pen?

Handheld input device that can detect the
presence of light

p. 171
Press light pen against screen surface and then press
button on pen
Next
12
Keyboard and Pointing Devices
What is a touch screen?


Touch areas of screen with
finger
Often used with kiosks
p. 171 Fig. 5-9
13
Keyboard and Pointing Devices
What is a stylus and a digital pen?


Looks like a ballpoint pen, but uses pressure to write
text and draw lines
Used with graphics tablets, flat electronic boards
p. 172 Fig. 5-10
Next
14
Other Input Devices
What is voice input?
 Entering data by speaking into a microphone
 Voice recognition or speech recognition is the
computer’s capability to distinguish spoken words
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Voice Input
below Chapter 5
p. 173
Next
15
Other Input Devices
What is audio input?
 Entering sounds into a computer - speech,
music, and sound effects
 MIDI - standard defining how digital musical
devices represent sound electronically
p. 173 Fig. 5-13
16
Other Input Devices
How is data
entered into a
PDA?
p. 174 Fig. 5-14
Next
17
Other Input Devices
What is a smart phone?

p. 175
Users can input and send text messages, graphics,
pictures, video clips, and sound files
Next
18
PDAs, Tablet PCs, and Smart Phones
What is a Tablet PC?


Mobile computer that
includes handwriting
recognition software
Primary input device is a
pressure-sensitive digital
pen
p. 175 Fig. 5-15
Next
19
Other Input Devices
What is a digital camera?


Allows you to take
digital pictures
Images viewable
immediately on
camera


p. 175 Fig. 5-16
Download to
computer
Post pictures
to Web
Next
20
Other Input Devices
What is resolution?



Sharpness and clarity of image
The higher the resolution, the better the image
quality, but the more expensive the camera
Pixel (picture element) is single point in electronic
image

p. 175
Greater the number of pixels, the better the image
quality
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21
Other Input Devices
What is video input?


p. 176
Process of storing full-motion images on a
computer’s storage medium
Digital video (DV)
camera records video as
digital signals
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22
Other Input Devices
What is a PC video camera and a Web cam?

PC video camera — DV camera used to capture video
and still images, and to make
video telephone calls on Internet
c


c
Also called PC camera
Web cam — video camera
that displays its output on a
Web page
p. 176 Fig. 5-17
c
c
Next
23
Other Input Devices
What is video conferencing?

Two or more geographically separated people
who use network on Internet to transmit
audio and video data
p. 176 Fig. 5-18
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24
Other Input Devices
What is a scanner?

Light-sensing device that reads printed text and
graphics

p. 177 Fig. 5-19
Used for image processing, converting paper
documents into electronic images
Next
25
Other Input Devices
What is a turnaround document?

Document that you
return to the company
that sent it

p. 177 Fig. 5-20
Portion you return has
information printed in
OCR characters
Next
26
Other Input Devices
What is an optical reader?

Device that uses light source to read characters, marks,
and codes and then converts them into digital data



p. 178 Fig. 5-21
Optical character recognition
(OCR) reads characters in
OCR font
Optical mark recognition
(OMR) reads hand-drawn
pencil marks, such as small
circles
Bar code reader
Next
27
Other Input Devices
What is an RFID reader?

Reads information on
the tag via radio waves

p. 178 Fig. 5-22
Can be handheld
devices or mounted in a
stationary object
Next
28
Other Input Devices
What is a magnetic stripe card reader?


Reads the magnetic
stripe on the back of a
credit card
Exposure to a magnetic
field can erase the
contents of a card’s
magnetic stripe
p. 179 Fig. 5-23
Next
29
Other Input Devices
What is a magnetic-ink character recognition
(MICR) reader?


p. 179 Fig. 5-24
Can read text printed with magnetized ink
Banking industry almost exclusively uses MICR
for check
processing
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Other Input Devices
What is a point of sale (POS) terminal?

Records purchases,
processes credit or
debit cards, and
updates inventory
p. 180 Fig. 5-25
31
Other Input Devices
What is an automated teller machine (ATM)?

Self-service banking machine that connects to a host
computer through a network
p. 180 Fig. 5-26
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Other Input Devices
What is biometrics?

Authenticates person’s identity
by verifying a personal
characteristic

Fingerprint scanner captures
curves and indentations of
fingerprint
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Biometric Input
below Chapter 5
p. 181 Fig. 5-27
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Other Input Devices
What are examples of biometric technology?



Voice verification system compares live
speech with stored voice pattern
Signature verification system recognizes
shape of signature
Iris recognition system reads
patterns in blood vessels in back
of eye

p. 181 Fig. 5-28
Biometric data is sometimes stored
on smart card, which stores
personal data on microprocessor
embedded in card
Next
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What is Output?
What is output?

Data that has been processed into a useful form,
called information

p. 182 Fig. 5-29
Output device is any hardware component that can convey
information to one or more people
Next
35
Display Devices
What is a display device?

Output device that visually conveys information


Information on display device sometimes
called soft copy
Monitor houses display device as separate peripheral
p. 183 Fig. 5-31
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Display Devices
What is an LCD monitor?



Uses liquid crystal display
Have a small footprint
Mobile devices that contain
LCD displays include
 Notebook computer,
Tablet PC, PDA, and
Smart Phone
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click LCD Technology
below Chapter 5
p. 184 - 185 Fig. 5-30
Next
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Display Devices
What is a plasma monitor?

Displays image by applying voltage to layer of gas

p. 185 Fig. 5-32
Larger screen size and higher display quality than LCD, but
are more expensive
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Display Devices
What is a CRT monitor?


Contains cathode-ray
tube (CRT)
Common sizes are 15, 17,
19, 21, and 22 inches

p. 186 Fig. 5-33
Viewable size is diagonal
measurement of actual
viewing area
39
Display Devices
What determines the quality of a CRT monitor?



p. 186
Screen resolution
Text created with a smaller dot pitch is easier
to read
Refresh rate is speed at which monitor redraws
images on screen
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Printers
What is a printer?


Output device that produces text and graphics on a
physical medium
Purchasing a printer
p. 187 Fig. 5-34
Next
41
Printers
What are the various ways to print documents and
pictures?
wireless
printers
printer
cable
various
ways to
print
cable
docking
station
p. 188 Fig. 5-35
media
card
42
Printers
What is a nonimpact printer?

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
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Ink-Jet Printers
below Chapter 5
p. 189 Fig. 5-36
Next
43
Printers
What is a photo printer?


Color printer that produces photo-lab-quality pictures
Many photo printers have a built-in card slot
p. 190 Fig. 5-37
Next
44
Printers
What is a laser printer?



High-speed, high-quality
nonimpact printer
Prints text and graphics in very
high-quality resolution,
ranging from 1,200 to 2,400 dpi
Typically costs more than
ink-jet printer, but is much
faster
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Laser Printers
below Chapter 5
p. 190 - 191 Fig. 5-38
Next
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Printers
What is a thermal printer?

Generates images by pushing electrically heated pins
against heat-sensitive paper

p. 191 Fig. 5-39
Dye-sublimation printer, (also called a digital photo
printer) uses heat to transfer dye to specially coated
paper
Next
46
Printers
What is a mobile printer?

Small, lightweight, battery-powered printer that allows
mobile user to print from notebook computer, Tablet
PC, PDA, or smart phone while traveling
p. 192 Fig. 5-40
Next
47
Printers
What is a plotter?


Sophisticated printer used to produce high-quality
drawings
Large-format printer creates photo-realistic-quality
color prints
p. 192 Fig. 5-41
Next
48
Printers
What is an impact printer?

Forms characters by striking mechanism against inked ribbon
that contacts paper
 Dot-matrix printer produces
printed images when tiny
wire pins strike ribbon
 Line printer prints entire line
at a time
p. 192 - 193 Fig. 5-42
Next
49
Other Output Devices
What is an audio output device?


Computer component that produces music, speech, or
other sounds
Speakers, earphones, and earbuds are common devices
Click to view Web Link,
click Chapter 5, Click Web Link
from left navigation,
then click Earphones
below Chapter 5
p. 193 Fig. 5-43
50
Video: Wired Cellular Headsets
A guide to the best cellular headsets
low quality
(click to start)
high quality
(click to start)
Next
51
Other Output Devices
What is voice output?


p. 194
Computer talks to you through speakers on computer
Internet telephony allows you to have conversation
over Web
Next
52
Other Output Devices
What is a facsimile (fax) machine?

Device that transmits and receives documents over
telephone lines
What is a fax modem?

Modem that allows you to send and receive electronic
documents as faxes
p. 194 Fig. 5-44
Next
53
Other Output Devices
What is a multifunction peripheral?

Provides functionality
of printer, scanner,
copy machine, and
fax machine
p. 194 Fig. 5-45
Next
54
Other Output Devices
What is a data projector?

Device that takes image from computer screen
and projects it onto larger screen
p. 195 Fig. 5-46
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Putting It All Together
What are suggested output devices for the home user?
Home User
Input Device
• Enhanced keyboard or
ergonomic keyboard
• Mouse
• Stylus for PDA or smart
phone
• Joystick or wheel
• Color scanner
• 3-megapixel digital
camera
• Headphones that
include a microphone
• PC video camera
p. 196 Fig. 5-47
Output Device
• 17- or 19-inch color LCD
monitor
• Ink-jet color printer; or
• Photo printer
• Speakers
• Headphones or
earphones
Next
56
Putting It All Together
What are suggested output devices for the small office/home
office user?
SOHO User
Input Device
• Enhanced keyboard or
ergonomic keyboard
• Mouse
• Stylus and portable
keyboard for PDA or
smart phone, or digital
pen for Tablet PC
• Color scanner
• 3-megapixel digital
camera
• Headphones that
include a microphone
• PC video camera
p. 196 Fig. 5-47
Output Device
• 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-andwhite or color)
• Fax machine
• Speakers
Next
57
Putting It All Together
What are suggested output devices for the mobile user?
Mobile User
Input Device
• Wireless mouse for
notebook computer
• Touchpad or pointing
stick on notebook
computer
• Stylus and portable
keyboard for PDA or
smart phone, or digital
pen for Tablet PC
• 3- or 4-megapixel digital
camera
• Headphones that
include a microphone
• Fingerprint scanner for
notebook computer
p. 196 Fig. 5-47
Output Device
• 15.7-inch LCD screen
on notebook computer
• Color LCD screen on
PDA or smart phone
• Mobile color printer
• Ink-jet color printer; or
• Laser printer, for inoffice use (black-andwhite or color)
• Photo printer
• Fax modem
• Headphones or
earphones
• Data projector
58
Putting It All Together
What are suggested output devices for the power user?
Power User
Input Device
• Enhanced keyboard or
ergonomic keyboard
• Mouse
• Stylus and portable
keyboard for PDA or
smart phone
• Pen for graphics tablet
• Color scanner
• 6- to 8-megapixel digital
camera
• Headphones that
include a microphone
• PC video camera
p. 196 Fig. 5-47
Output Device
• 23-inch LCD monitor
• Laser printer (black-andwhite or color)
• Plotter or large-format
printer; or
• Photo printer; or
• Dye-sublimation printer
• Fax machine or fax
modem
• Speakers
• Headphones or
earphones
Next
59
Putting It All Together
What are suggested output devices for the large business user?
Large
Business User
p. 196 Fig. 5-47
Input Device
• Enhanced keyboard or
ergonomic keyboard
• Mouse
• Stylus and portable
keyboard for PDA or smart
phone, or digital pen for
Tablet PC
• Touch screen
• Light pen
• Color scanner
• OCR/OMR readers, bar
code readers, or MICR
reader
• Microphone
• Video camera for video
conferences
• Fingerprint scanner or
other biometric device
Output Device
• 19- or 21-inch LCD monitor
• Color LCD screen on Tablet
PC, PDA, or smart phone
• High-speed laser printer
• Laser printer, color
• Line printer (for large
reports from a mainframe)
• Fax machine or fax modem
• Speakers
• Headphones or earphones
• Data projector
60
Input and Output Devices for Physically Challenged
Users
What input devices are available
for those with physical limitations?


Keyboards with larger keys
Head-mounted pointer controls
pointer on screen
p. 197 Fig. 5-48
61
Input and Output Devices for Physically Challenged
Users
What other output options are available for visually
impaired users?



Change Window settings,
such as increasing size or
changing color of text to
make words easier to read
Blind users can work with
voice output
Braille printer outputs
information in Braille
onto paper
p. 197 Fig. 5-49
Next
62
Summary of Input and Output
Data and instructions
Processing and organizing
input into output
Various techniques of input
Various methods of output
Commonly used input devices
Commonly used output devices
Chapter 5 Complete
63