1. Output Devices

2. Contents Introduction Various Output Devices Monitors Printers
Types of Printers
Dot Matrix Printer
Inkjet Printer
Daisy Wheel Printer
Laser Printer
Plotters
Speakers

3. Introduction
Any device that outputs information from a computer is called, an output device.
Output devices enable the users to perceive the results of computer processing.
An output device is any piece of computer hardware equipment used to communicate the results of data processing carried out by an information processing system (such as a computer) which converts the electronically generated information into human- readable form.
Devices that display, print, or transmit the results of processing from the computer’s memory.
An output device is any peripheral device that converts machine-readable information into people-readable form such as a monitor, printer, plotter and voice output device.
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4. Various Output Devices
Monitors
Printers
Plotters
Speakers
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5. Monitors
The on-screen display enables the user to view the results of data processing.
The monitors has its own processing circuitry and memory, called Video RAM (VRAM).
The screen output is referred to as a soft copy, while the printed version of the same information is called the hard copy.
Monitors use Cathode Ray Tube (CRT) technology used in television sets.

6. The image is formed by electrons “guns” which shoots a stream of electrons at the screen’s phosphorescent surface.
In a color monitor, three electron guns, (red, green, and blue) are used.
They fire electrons in varying intensities to produce on-screen shots.

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8. Printers Back A printer is a device that prints output to a page.
Printers are commonly categorized by the way they create print characters
Printers come in color or simply black and white.
Most businesses have laser printers since the quality is better.
Printers can be connected to the computer or networked using a print server.
Two basic print technologies are:-
∙Impact printers
∙Non-impact printers
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9. Types of Printers
Impact Printer: An impact printer forms characters and graphics on a piece of paper by striking a mechanism contacts the paper.
Non-Impact Printers: A non-impact printer forms character and graphics on a piece of paper without actually striking the paper.

10. Types of Printer Back Types of Impact Printer
Daisy Wheel Printer
Dot-Matrix Printer
Types of Non-Impact Printer
Ink-Jet Printer
Laser Printer
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11. Dot Matrix Printer
A dot matrix printer forms characters and graphics on the paper by producing pattern of dots.
Dot matrix printers are relatively cheap and so is the stationary they use.
Dot matrix printers are generally noisy.
Slow, with speed usually ranging between 30 to 600 characters per second.

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13. Daisy Wheel Printer Back
A Daisy Wheel printer is an impact printer that uses a wheel as a print head. As the Wheel rotates, a hammer strikes the backside of the spoke and presses it against the paper to print a character.
Can print letter quality characters.
Printing speed is very slow.
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14. Inkjet Printer
This is a non-impact printer that forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper.
Inkjet Printers are very quite to operate and can produce good quality printouts of both graphics and text.
Inkjet Printers are generally quite.
Inkjet Printers can produce high
quality color output
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15. Laser Printer
The mechanism of haw a laser printer works is similar to a photocopier. Laser printers are also known as page printers because they process and store the entire page before they actually print it.
Laser printers can be print text at speeds of 4 to over 30 pages per minute.
The cost per page of toner cartridges is lower than other printers.
Laser printers are quite and fast.
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16. Plotters
A plotter is large printer that generates high-quality documents by moving ink panes over the surface of paper.
Plotters are particularly useful to engineers and architects, as they produce high quality blueprints, maps, and floor plans.
Can print on large printers
High quality printing
Plotters are expensive
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17. Speakers
A speaker, or speaker system converts an electrical signal to sound
The term loudspeaker can refer to individual transducers (known as drivers), or to complete systems consisting of a enclosures incorporating one or more drivers and electrical filter components.
Loudspeakers are the most variable elements in an audio system and are responsible for the greatest degree of audible difference between sound system.

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19. Thank You