Output devices of computer

OUTPUT DEVICES…

PRESENTED BY…

JEROME

FRANCLIN

ASHISHTHOMAS

RADHAKRISHNAN

NAWAF

JAYARAM

Output devices of computer:

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.

Examples

Speakers

Headphones

Screen (Monitor)

Printer

Automotive navigation system (GPS)

Projector

Plotter

Television

Monitors

Monitor commonly called as Visual Display Unit (VDU) is the main output

device of a computer. It forms images from tiny dots, called pixels, that are

arranged in a rectangular form. The sharpness of the image depends upon

the number of the pixels.

There are two kinds of viewing screen used for monitors:

Cathode-Ray Tube (CRT)

Flat-Panel Display

CRT MONITOR

Cathode-Ray Tube (CRT) Monitor

In the CRT, display is made up of small picture elements called pixels for short. The smaller

the pixels, the better the image clarity or resolution. It takes more than one illuminated

pixel to form whole character, such as the letter 'e' in the word help. A finite number of

characters can be displayed on a screen at once. The screen can be divided into a

series of character boxes - fixed location on the screen where a standard character can

be placed.

Most screens are capable of displaying 80 characters of data horizontally and 25 lines

vertically. There are some disadvantages of CRT:

Large in Size

High power consumption

Flat-Panel Display Monitor

Flat-Panel Display Monitor

The flat-panel display refers to a class of video devices that have reduced volume,

weight and power requirement compared to the CRT. You can hang them on walls or

wear them on your wrists. Current uses for flat-panel displays include calculators,

video games, monitors, laptop computer, graphics display.

The flat-panel display are divided into two categories:

Emissive Displays - The emissive displays are devices that convert electrical energy

into light. Example are plasma panel and LED (Light-Emitting Diodes).

Non-Emissive Displays - The Non-emissive displays use optical effects to convert

sunlight or light from some other source into graphics patterns. Example is LCD

(Liquid-Crystal Device)

Printers

Printer is the most important output device, which is used to print information on

paper.

The types of printers:

All-in-one (AIO) printer

Dot Matrix printer

Inkjet printer

Thermal printer

LED printer

3D printer

Printers

3D Printer

Created by Charles W. Hull in 1984, the 3D printer is a sophisticated printing device

that uses a design from a digital image to produce an identical physical object using

materials such as metal alloys, polymers, or plastics.

An object's design typically begins in a computer aided design (CAD) software

system, where its blueprint is created. The blueprint is then sent from the CAD system

to the printer in a file format known as a Stereolithography (STL), which is typically

used in CAD systems to design 3D objects. The printer then reads the blueprint in

cross-sections and begin the process of recreating the object just as it appears in the

computer aided design. In the picture below is an example of a 3D printer called

the Flash Forge.

3D Printer

Application of 3D printers

3D printers are used in many disciplines--aerospace engineering, dentistry,

archaeology, biotechnology, and information systems are a few examples

of industries that utilize them. As an example, a 3D printer might be used in

the field of archaeology to physically reconstruct ancient artifacts that

have been damaged over time, thus eliminating the need of a mold.

GPS

Short for Global Positioning System, GPS is a network of satellites that helps users

determine a location on Earth. The thought of GPS was conceived after the launch of

Sputnik in1957. In 1964, the TRANSIT system became operational on U.S. Polaris

submarines and allowed for accurate positioning updates. Later this became available

for commercial use in1967. a GPS used to find locations while driving.

On September 1, 1983 Soviet jets shot down a civilian Korean Air Lines Flight 007 flying

from New York to Seoul and kill all 269 passengers and crew. As a result of this mistake,

President Ronald Regan orders the U.S. military to make Global Positioning System (GPS)

available for civilian use.

Today, with the right equipment or software, anyone can establish a connection to these

satellites to establish his or her location within 50 to 100 feet.

GPS

Headphones

Sometimes referred to as earphones, headphones are a hardware device

that either plugs into your computer (line out) or your speakers and allow

you to privately listen to audio without disturbing anyone else. The picture

is an example of a USB headset from Logitech with a microphone and a

popular solution for computer gaming.

Headphones

Plotter

A plotter is a computer hardware device similar to a printer that uses a

pen, pencil, marker or other writing tool to make a design. Often these

printers are used in schematics, CAD, and other print jobs. The picture is an

example of what a plotter printer may look like.

PLOTTER

Projector

An output device that can take the display of a computer screen and

project a large version of it onto a flat surface. Projectors are often used in

meetings and presentations to help make sure everyone in the room can

view the presentation. The picture of the View Sonic projector is an

example of what a projector may look like. Projectors used with computers

are small devices that are rarely much larger than a toaster and typically

weigh a few pounds.

Projector

Speaker

A speaker is a term used to describe the user who is giving vocal commands to

a software program.

A hardware device connected to a computer's sound card that outputs sounds

generated by the computer.

When computers were originally released they had on-board speakers that generated a

series of different tones and beeps. As multimedia and games became popular, higher

quality computers speakers began to be released that required additional power.

Speakers are rated in Frequency response, Total Harmonic Distortion, and Watts. The

Frequency response is the rate of measurement of the highs and lows of the sounds the

speaker produces, Total Harmonic Distortion (THD) is the amount of distortion created by

amplifying the signal, and the Watts is the amount of amplification available for the

speakers.

Speaker

TV

Short for television a TV or telly is an electronics device that receives a

visual and audible signal and plays it to the viewer. Although debated the

TV is often credited as being invented by Vladimir Kosma Zworykin a

Russian-born American who worked for Westinghouse, and Philo Taylor

Farnsworth, a boy in Beaver City, Utah who was backed by George

Everson. Vladimir held the patent for the TV, but it was Farnsworth who was

the first person to first successfully transmit a TV signal on September

7, 1927.

TV