chap6

1. Chapter 6
BTECH1101 | Fundamental of Computer Systems
Prepared by Mohamed Abdulkarim

2. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
What is Output
What is output?
 Data that has been processed into a useful form
 Output device is any hardware component that can convey
information to one or more people
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3. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Display Devices
What is a display device?
 Output device that visually conveys text, graphics, and video
information
 Typically used with desktop computers
 Monitor houses display device as separate peripheral
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4. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
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, ultra
personal computer, portable media
player, smart phone, and PDA
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5. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Display Devices
What is a plasma monitor?
 Uses gas plasma technology
 Larger screen size and richer colors than LCD, but are more expensive
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6. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Display Devices
What is a CRT monitor?
 Contains cathode-ray
tube (CRT)
 Common sizes are 15, 17, 19, 21,
and 22 inches
 Viewable size is diagonal
measurement of actual viewing area
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7. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Display Devices
What determines the quality of a CRT monitor?
 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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8. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Printers
What is a printer?
 Output device that produces text and graphics on a physical medium
 Purchasing a printer
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9. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Printers
What are the various ways to print documents and pictures?
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10. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
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
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11. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Printers
What is a photo printer?
 Color printer that produces photo-lab-quality pictures
 Many photo printers have a built-in card slot
 Picture Bridge is a standard technology that allows
you to print pictures directly from a digital camera
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12. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Printers
What is a laser printer?
 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
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13. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Printers
What is a thermal printer?
 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
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14. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
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
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15. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Printers
What is a plotter?
 Sophisticated printer used to produce high-quality drawings
 Large-format printer creates photo-realistic-quality color prints
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16. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
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
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17. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Other Output Devices
What is an audio output device?
 Computer component that produces music, speech, or other sounds
 Speakers, earphones, and ear buds are common devices
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18. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Other Output Devices
What is voice output?
 Computer talks to you through speakers on computer
 Internet telephony allows you to have conversation over the Internet
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19. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
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
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20. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Other Output Devices
What is a multifunction peripheral?
 Provides functionality
of a printer, scanner,
copy machine, and
fax machine
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21. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Other Output Devices
What is a data projector?
 Device that takes the text and
image from computer screen
and projects it onto larger
screen
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22. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Putting It All Together
• What are suggested input and output devices for the home user?
Home User Input Device Output Device
• Enhanced keyboard or • 17- or 19-inch color LCD
ergonomic keyboard monitor
• Mouse • Ink-jet color printer; or
• Stylus for PDA or smart • Photo printer
phone • Speakers
• Game controller • Headphones or earphones
• Color scanner
• 4-megapixel digital camera
• Headphones that include a
microphone
• PC video camera
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23. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Putting It All Together
• What are suggested input and output devices for the small office/home
office user?
SOHO User Input Device Output Device
• Enhanced keyboard or • 19- or 21-inch LCD monitor
ergonomic keyboard • Color LCD screen on
• Mouse Tablet PC, PDA,or smart
• Stylus and portable phone
keyboard for PDA or smart • Multifunction peripheral; or
phone, or digital pen for • Ink-jet color printer; or
Tablet PC • Laser printer (black-and-
• Color scanner white or color)
• 3-megapixel digital camera • Fax machine
• Headphones that include a • Speakers
microphone
• PC video camera
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24. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Putting It All Together
• What are suggested input and output devices for the mobile user?
Mobile User Input Device Output Device
• Wireless mouse for • 17-inch LCD screen on
notebook computer notebook computer
• Touchpad or pointing stick •LCD screen on PDA or
on notebook computer smart phone
• Stylus and portable • Mobile color printer
keyboard for PDA or smart • Ink-jet color printer; or
phone, or digital pen for • Laser printer, for in-office
Tablet PC use (black-and-white or
• 4-megapixel digital camera color)
• Headphones that include a • Photo printer
microphone • Fax modem
• Fingerprint scanner for • Headphones or earphones
notebook computer • Data projector
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25. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Putting It All Together
• What are suggested input and output devices for the power user?
Power User Input Device Output Device
• Enhanced keyboard or • 23-inch LCD monitor
ergonomic keyboard • Laser printer (black-and-
• Mouse white or color)
• Stylus and portable • Plotter or large-format
keyboard for PDA or smart printer; or
phone • Photo printer; or
• Pen for graphics tablet • Dye-sublimation printer
• Color scanner • Fax machine or fax modem
• 6- to 12-megapixel digital • Speakers
camera • Headphones or earphones
• Headphones that include a
microphone
• PC video camera
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26. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Putting It All Together
• What are suggested input and output devices for the large business user?
Large
Business User Input Device Output
Device
• Enhanced keyboard or
• 19- or 21-inch LCD monitor
ergonomic keyboard
•LCD screen on Tablet PC, PDA,
• Mouse
or smart phone
• Stylus and portable keyboard
• High-speed laser printer
for PDA or smart phone, or
• Laser printer, color
digital pen for Tablet PC
• Line printer (for large reports
• Touch screen
from a mainframe)
• Light pen
• Fax machine or fax modem
• Color scanner
• Speakers
•6- to 12- megapixel digital
• Headphones or earphones
camera
• Data projector
• OCR/OMR readers, bar code
readers, or MICR reader
• Microphone
• Video camera for video
conferences
• Fingerprint scanner or other
biometric device
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27. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
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
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28. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
Summary of Input and Output
Processing and organizing
Data and instructions
input into output
Various techniques of input Various methods of output
Commonly used input devices Commonly used output devices
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29. Faculty of Information and Communication Technology
BTECH1101 | Fundamental of Computer Systems
End of Lecture
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