The document discusses different types of output devices. It describes monitors, printers, and plotters as common output devices. Monitors can be CRT or flat panel displays like LCD. Printers are categorized as impact printers, like dot matrix printers, or non-impact printers, such as inkjet and laser printers. Inkjet printers spray tiny droplets of ink onto paper, while laser printers use heat and pressure to bind toner particles to paper. The document provides examples and details on how different output devices work.

1. Output Device
 A device used to display the results.
 Output device converts data from binary form to
human readable form.
 Output device can display, print or plot the
processed data.
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2. Output devices
 Monitor or Screen or VDU
 Printer
 Plotter
 Speaker
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3. Monitor
 The monitor looks like a TV screen.
 Monitors available in 14”, 15”, 17” and even 21”.
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4. Monitors are categorized into
 CRT
 Flat –Panel displays
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5. CRT monitor
 CRT means Cathode Ray Tube
 It works with one or more electron guns that
systematically aim a beam of electrons at every pixel
on the screen.
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6. Flat-Panel monitor
 The most commonly used flat-panel monitor is LCD
(Liquid Crystal Display).
 It creates images with a special kind of liquid crystal
that is normally transparent but becomes opaque
when charged with electricity.
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7. Monitor
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8. Printer
 Another important output device is the printer.
 Types of Printers
1. Impact printers
2. Non-Impact printers
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9. Impact Printer
 It creates an image on paper by striking on the inked
ribbon, and prints a character.
 It works like a typewriter, which uses small hammers
to strike the ribbon.
 Example: dot matrix printer.
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10. Dot matrix printer
 It is a common type of impact printer.
 It uses a print head, which contains a cluster of
pins.
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11. Dot matrix printer (contd...)
 The printer can push the pins out to form patterns in
rapid sequence.
 The pins are used to press an inked ribbon against
paper, thus creating an image.
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12. Dot matrix printer
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13. Non Impact Printer
 Non impact use various methods to place ink (or
another colored substance) on the page.
 Example :Ink jet printers use tiny nozzles to spray
droplets of ink onto the page.
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14. Inkjet printer
 An ink jet printer is an example of non-impact
printer.
 It creates an image by spraying tiny droplets of ink
onto the paper.
 Ink jet printers are inexpensive.
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15. Inkjet printer
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16. Laser Printer
 It is a non-impact and letter quality printer.
 It produce higher quality print and is fast
and convenient to use
 It is more expensive than ink jet printer.
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17. Laser Printer (contd)
 They use heat and pressure to bind tiny particles of
toner (a dry ink) to paper.
 Laser printers are available in both color and black &
white.
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18. Laser Printer (Color)
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19. Laser Printer
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20. Summary
In this class, we have learnt about
Functions of input and output devices.
Different types of input and output devices.
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21. Frequently Asked Questions
1. Describe the functions of input and output
devices?
2. List different input and output devices?
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22. Quiz
1. A _____ is just like a type writer.
a. key board.
b. printer
c. Scanner
d. Plotter
Answer: a
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23. Quiz (Contd...)
2. A monitor is
a. Input device
b. Memory device
c. Output device
d. none of the above
Answer: c
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24. Quiz:
3. Scanner is
a. input device
b. output device
c. Memory device
d. None of the above
Answer: a
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25. Quiz (Contd...)
4. What is used for select and move items on the
screen.
a. Mouse
b. Keyboard
c. Light pen
d. Scanner
Answer: a
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