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?

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

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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. : LED monitors are said to use much lesser power than CRT and LCD. Thus, they are also considered environmental friendly.

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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2. Plotters

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.

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.

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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