OUTPUT DEVICES
Output Devices are those devices of the computer system that supplies information or result either in the form of hardcopy (printer) or softcopy (Monitor).
Now, What is Hardcopy & Softcopy?
A soft
copy (sometimes spelled "softcopy") is an electronic copy of some
type of data, such as a file viewed on a computer's display or transmitted as
an e-mail attachment. Such material, when printed, is referred to as a hard
copy .
Some of the common Output Devices are as follow:-
1. Monitor
2.Printers
3.Plotters
4.Multimedia Projector
5.Speech Synthesizer
6.Speakers
Some brief about the above:
1. Monitor (V.D.U)
Monitor is also known as V.D.U (Visual Display Unit) .It look alike a television and its size is measured in term of diagonal length of the screen.
Monitors are available in 9" , 12", 14" ,15" ,17" , 19" & even in 21" .
It shows text , pictures in color or black & white type. Color monitors are more costly than the black & white monitors.Whatever you type on the keyboard ,you can see it on the monitor.
Types of computer monitors
CRT (cathode ray tube)
monitors. These monitors employ CRT technology, which was used most commonly in
the manufacturing of television screens.
LCD (liquid crystal
display) monitors : The LCD monitor incorporates one of the most advanced
technologies available today.
LED (light-emitting
diodes) monitors. :
2. Printers
Printer is an external output device that takes data from a computer and generate output in the form of hardcopy.
Printer are two types :
a) Impact
1.Dot Matrix Printers
2.Daisy Wheel Printer
3.Line Printer
4.Drum Printer
5.Chain Printer
6.Band Printer
b)Non Impact
1.Ink Jet Printers
2.Laser Printer
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Printer |
2. Plotters
A plotter is a computer hardware device
much like a printer that is used for printing vector graphics. Instead of
toner, plotters use a pen, pencil, marker, or another writing tool to draw
multiple, continuous lines onto paper rather than a series of dots like a
traditional printer.
Though once widely used for computer-aided design, these
devices have more or less been phased out by wide-format printers.
Plotters are
used to produce a hard copy of schematics and other similar applications.Plotter are widely used to print designs of things such as Car , Ship & Building on a piece of paper using a pen.
The first plotter was invented in 1953 by Remington-Rand. It was used in conjunction with the UNIVAC computer to created technical drawings.
4.Multimedia Projector
A multimedia projector is a compact, high
resolution, full-color projector capable of projecting text, images, video and
audio content. Typically the projector will feature inputs for a computer, DVD
player, VCR, CD player and storage device.
Multimedia projectors are also referred to as data
projectors, digital projectors and data/video projectors. These names can apply
to both portable and ceiling-mounted units provided that they can project
computer output.
Multimedia projectors are used frequently in
classrooms, offices and gatherings at which multimedia presentations are made.
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PROJECTOR |
5. Speech Synthesizer
Speech synthesis is artificial simulation of human
speech with by a computer or other device. The counterpart of the voice
recognition, speech synthesis is mostly used for translating text information
into audio information and in applications such as voice-enabled services and
mobile applications.
Apart from this, it is also used in assistive technology
for helping vision-impaired individuals in reading text content.
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SPEECH SYNTHESIZER |
6. SPEAKERS
Speakers are one of the most common output devices
used with computer systems. Some speakers are designed to work specifically
with computers, while others can be hooked up to any type of sound system.
Regardless of their design, the purpose of speakers is to produce audio output
that can be heard by the listener.
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| SPEAKERS |
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