printers display screens and speakers are __________ devices price

You know, none of these are really easy choices. If it"s just you working on the system, the decisions might be simple, but if you have to consider others" opinions, not so much. Let"s start with the monitor. We use this to view the work we"re doing at the time or to view a finished product. We may also use it to view videos or photos we"ve taken or found online.

Monitors come in many sizes and descriptions. To make the best decision, you should ask yourself what you"ll be doing the most with your computer. Are you just writing papers or creating presentations? Are you surfing the Internet? Are you playing games once in a while? Are they games that are not intensive in graphics? Are you making and editing videos for fun - or for a profession?

If you can keep it simple, the standard monitor is for you. If you"re playing games with intensive graphics, making videos or working with digital photographs or art, you may want a high-definition monitor. If you"re going to use a computer as your home entertainment system, you can find one that is TV-ready as well.

The size of the monitor you use truly depends on your preference. Things to consider are your eyesight, who else will be using it and the distance the monitor will be sitting away from you (assuming you go with a desktop unit, not a laptop). There are monitor sizes ranging from 7 inches as a supplementary peripheral, but normal monitors range from a 17-inch diagonal to a monster 55-inch diagonal! You could comfortably surf from the couch in the living room with a monitor this size.

Monitors are created with LCD (liquid crystal display) or LED (light-emitting diode). LCDs have layers of glass, polarized film and liquid crystals. You get electrical impulses sent through, and this causes the color to be shown and image to be displayed. LED monitors take the LCD one step further. They put a diode on the back that forces light through the layers for a sharper picture and better colors. It is said that LED monitors will last longer than LCD monitors.

Have you decided which one you want to go with? Don"t forget, you"ve also got touchscreen monitors available should you have a use for them. The most practical use of a touchscreen monitor for consumer and professional use would be to someone with a physical disability.

The next difficult decision to make will be the printer that will work best for you. Printers are used to create a tangible product to look at away from a monitor. For consumer use there are two kinds to choose from: the inkjet and the laser printer.

The inkjet printer uses a liquid ink that"s sprayed through a print head onto a piece of paper. How? Simply put, the printer interprets the signal from the computer and converts it to instructions that go through the print head. Inkjet printers are typically inexpensive to purchase, although the replacement ink can be costly and add up.

Laser printers use heat technology and specialized powder called toner or another medium (I"ve seen it with wax - it looked like crayons) that"s heat-sealed onto a piece of paper. Laser printers are somewhat expensive, though they"ve come down in cost as the technology has increased.

Both types are often available as mono-color (or black-only printer), full-color or an all-in-one printer. An all-in-one printer typically has a printer, a copier and a scanner. Some still have a fax feature as well.

You should ask yourself how much you"ll be printing and how often. If you don"t print too much, the inkjet printer may be for you. One disadvantage, though, to not printing often with an inkjet printer is that the print head can actually plug up, dry out and then not work. If you print frequently or in large quantities, you may find yourself purchasing ink quite often. Ink varies in price but ranges between $9 and $25 for about 250 sheets of text-only in black ink. The toner for laser printers seems prohibitive but usually will print up to 5000 sheets of paper per cartridge. These toners are between $80-$100 a unit.

An example of typical usage: several years ago I bought a mono-laser printer (actually, it was an all-in-one) for about $170. It was used to create syllabi for seven different classes and hand-outs for most of those classes, for my daughter to write papers for her high school classes and for my son (who discovered SpongeBob on the Internet and printed out hundreds of coloring sheets), and I prepared at least 60 tax returns in that season. The one toner cartridge lasted more than a year.

Speakers are used to emit audio signals that may come from music files or other audio files. Many pre-constructed computers come with external speakers. All come with internal speakers. Usually, the external speakers included are more than good enough for sound quality, whether you"re watching YouTube videos or playing a movie in your DVD player. There are people who prefer a little more bump in their audio output, however. Speakers are available in surround-sound systems that rival a home system. How loud you want your system to be is up to you. The higher-quality the sound system, the more expensive it will be.

Many computers now support Bluetooth technology. You can connect to Bluetooth-enabled speakers and set them up without the need for additional cables or connections!

You don"t have to pick all of these output devices for your computer system, but it is important to remember that monitors are output devices that let us see what we"re working on as we are working on it as well as to get a feel for what the finished product looks like.

Speakers are fun to shop for. They"re an audio output device allowing the transmission of sound files so the user can hear them. You can pick out how loud you want your system to be and find the sound package that works for you.

An output device is a piece of computer hardware that receives data from a computer and then translates that data into another form. That form may be audio, visual, textual, or hard copy such as a printed document.

The key distinction between an input device and an output device is that an input device sends data to the computer, whereas an output device receives data from the computer.

For example, using a microphone to record a podcast is an example of using an input device. Listening to the recorded podcast through a connected speaker is an example of using an output device. Both output and input devices are examples of auxiliary,or peripheral, devices.

Each output device example has a specific history, so here I cover specifically howeach device works, whenit became a part of technology history, popular brands on the market selling the device, and a fun fact.

Function: A monitor consists of a screen, circuitry, a power supply, buttons to adjust screen settings, and a casing that contains all of these components. A monitor displays data from a computer onto a screen so the user can interact with the data via a digital interface.

Origin Story: The first monitors used the same technology as early televisions, relying on a cathode ray tube and a fluorescent screen. This technology was first utilized for computer monitors in 1965 in the Uniscope 300 machine, which had a built-in CRT display. CRT display lights up a series of dots with a beam on an active part of the screen. This resulted in a maximum resolution of 1600 by 1200 pixels. LCD (liquid crystal display) entered the market in 2000 and outsold CRT monitors in 2007. Nowadays, monitors incorporate flat display technology. Plasma monitors are brighter than both CRT and LCD and function by illuminating tiny charged gas bubbles, or plasma, in the screen.

Function: The function of a printer is to create a copy of whatever is sent from the computer to the printer. Printers take electronic data sent from a computer and generate a hard copy.

Origin Story: Photocopying, also known as xerography, is the origin-technology of modern-day printing and was invented in 1938 by Chester S. Carlson of Queens, New York.

The first inkjet printer was developed in 1951. There are many different types of printers, with inkjet and laser printers being two of the most common. Modern printers usually connect to a computer with a USB cable or via Wi-Fi.

Fun Fact:A plotter, which is also a type of print output device, is a similar type of hardware device to a printer. Unlike a printer, however, plotters use writing tools, such as pen, pencil, marker, to draw lines. Designed to use vector graphics, plotters were once commonly employed for computer-aided design, but have now been largely replaced by wide-format printers.

Origin Story: There’s no single figure who invented headphones, but the use of headphones stems from the military. Nathaniel Baldwin of Utah submitted a headphone prototype to the U.S. Navy in 1910, which was adopted some years after by Naval radio operators. Koss Corporation then created the first commercial stereo headphones in 1958. Nowadays, headphones come in all shapes and sizes, from basic earbuds to the traditional style with padding around the earpieces and a connecting band that fits over the user"s head.

Function:Computer speakers are hardware devices that transform the signal from the computer"s sound card into audio. Speakers create sound using internal amplifiers that vibrate at different frequencies according to data from the computer. This produces sound.

Origin Story:Speakers are essential if you want a louder sound, surround sound, fuller bass, or just higher quality audio. The first internal computer speaker (a speaker inside the chassis of a laptop) was created in 1981 by IBM. External computer speakers began to appear in stores in the early 1990s when computer gaming, digital music, and other forms of media became popular. Some computer speakers are wireless nowadays, connecting to the computer via Bluetooth.

Fun Fact:You can turn your speakers (or headphones!) into a microphone. The difference between computer speakers and a microphone is that the frequency of the vibration originates from external sounds rather than data from a computer.

Origin Story: Originally, projectors weren’tan output device. Projectors were first created and used in late 19th-century France. Throughout history, biunial lanterns were used to project ink on glass by photographers, lecturers, and magicians. A biunial lantern is a lantern with projection capabilities. "Biunial" means combining two things into one, so a biunial lantern is a directional lantern and a glass slide with a print on it for projecting.

In the early 1920s, filmstrips were used to show “films” in classrooms. Turning the knob allowed teachers to stop on specific slides. Clear film copies for projectors weren’t invented until the 1960s, and 3M became the leading producer in clear film and projectors.

Nowadays, projectors are typically used for presentations, watching movies, or as a teaching aid, as they enable an entire roomful of people to see images generated by a single computer. Modern projectors usually connect to the computer via an HDMI (high-definition multimedia) cable or VGA (video graphics array) cable.

Fun Fact: 3D projectors are designed to project two images of the same thing from different angles at the same time. Wearing 3D glasses, the viewer can see a 3D projection composed of multiple superimposed images.

Function: GPS is a radio-based navigation system that’s composed of a sender computer and a receiver. The sender broadcasts signals to 24 satellites that ping to the sender the exact location of the sender computer in the form of latitude and longitude coordinates. The satellites use microwave signals to “talk” to the GPS, giving information on location, vehicle speed, and a number of other pieces of data.

Origin Story: A Soviet-era technology, GPS was originally used in the 1960s totrack U.S. submarines carrying nuclear missiles. The Department of Defense deployed more satellites to bolster the burgeoning navigation system. By 1993, 24 satellites were in orbit and GPS was used broadly across the world in agriculture, aviation, the military, athletics, science, and the list goes on.

Function: The sound card controls the output of sound signals, enabling devices like speakers and headphones to work. The sound card is known as an expansion card, which means it can be added to the motherboard. Although a sound card is not essential to a computer"s basic functionality, you need one if you wish to play games, watch movies, listen to music, and use audio and video conferencing.

Origin Story:The first sound card was invented by Sherwin Gooch in 1972 and was used in PLATO systems (Programmed Logic for Automatic Teaching Operations). PLATO was the first computer-assisted learning system in widespread use. It wasn"t until 1988 that sound cards were widely used in PCs.

When computer data is sent through a sound card, it is sent to the card digitally. The sound card then translates the digital information (in the form of binary, or 0s and 1s) into analog information: vibrations, output in the form of sound.

Fun Fact:The popularization of sound cards originated in the gaming realm. Sierra Entertainment, a gaming platform, began supporting add-ons like sound cards and this enabled the sound card industry to grow without being an underground solution to a growing issue: shallow sound while gaming.

Function: As with the sound card, the video card is an expansion card that slots into the motherboard. The video card processes images and video, enabling visuals to be seen on a display. Most computers have basic video and graphics capabilities built into the computer"s motherboard, but for faster, more detailed graphics, a video card is required.

Origin Story:Video cards are also known as GPUs or graphics processing units. Before modern-day GPUs, IBM introduced the MDA (monochrome display adapter). The MDA supported visuals such as text and lines for uses such as drafting but didn"t offer any graphical experiences.

In order to increase the functionality of the burgeoning computing technology, Hercules Computer Technology invented the Hercules Graphics Card, which integrated with the MDA to offer a bitmapped (or "rasterized," or pixelated), graphics experience. From the 1990s on, graphics technology was increasingly like modern-day graphics cards and has increased in graphic quality and speed significantly since then.

Fun Fact:Video cards can work in both 2D images and 3D images. Images like browsers, computer desktops, and PDFs are considered 2D images, whereas computer games are considered 3D.

Function: A braille reader is a peripheral device that enables a blind person to read text displayed on a computer monitor. The text is sent by the computer to the device, where it is translated into a braille format and made readable by pushing rounded pins up through a flat surface. Braille readers are also called braille displays and come in various sizes. Braille readers come in the form of separate devices from a keyboard or as part of a keyboard. Most use piezoelectric technology, or electricity generated by mechanical stress, to create a single line of text at a time in the form of raised bumps.

This was the case until late 2018 when Blitlab proposed an electronic solution to the limited capabilities of braille readers. Blitlab, upon its release, will allow the visually impaired to use the internet and read books and newspapers more independently. The technology is still in development. The device will cost only around $500, which is little compared to traditional braille readers, which cost around $5,000 to $11,000.

Origin Story: Braille is a 63 character alphabet invented in 1824 by Louis Braille. Braille was embossed on paper and other materials for decades before braille reader technology was invented. The first braille output technology was patented in 1975 by the Schönherr Company, and braille reader technology has evolved slowly since.

Fun Fact: Blitlab is the first tablet-style braille reader technology that will utilize a perforated glass screen that raises bumps as the computer reads the text from websites and translates it to braille.

Function: SGDs, also known as voice output communication aids, generate text to speech. A user types something and when the command is sent, the SGD reads the sentence out loud.

Origin Story: The first version of the SGD used print output. The “patient-operated selector mechanism,” or POSSUM, found symbols on a display and illuminated them for the reader. In the 1980s Dynavox was formed by students from Carnegie Mellon University with the goal to make an effective SGD for a young woman with cerebral palsy. This resulted in the invention of the EyeTyper, a device that allowed the user to spell with their eyes that would then be spoken.

Fun Fact: The most famous use of an SGD was by Stephen Hawking. Hawking was an astrophysicist with Lou Gehrig’s disease (also known as ALS). Lou Gehrig’s disease slowly deteriorates nerves in the spine and brain that results in gradual loss of muscle control. This often includes the ability to speak.

The biunial lantern, for example, sufficed in lieu of a more advanced option for projecting pictures; most output devices (like projectors) as they are known today didn"t come into widespread use until the popularization of computer use at home in the 1980s.

This content is accurate and true to the best of the author’s knowledge and is not meant to substitute for formal and individualized advice from a qualified professional.

I really like your explanation to the above topic ( Output device). I am teacher and i teach ICT at Daboya in the Northern part of Ghana, West Africa. Most the the pupils I teach have no much idea about ICT. Even some have never seen a computer before. Because of these, teaching ICT here is a big problem since every thing mention is new or strange to them. But for what i had from you,I am really grateful. My suggestion is that you should try to add the images of these devices so that pupils like mine can also have the opportunity to see them. Once again, thank you very much.

Prices are very reasonable for basic projectors, however, a data projector capable of showing cinema films or sports footage in a bar are far more expensive.

These tiny mirrors are carefully in sync with the colour wheel, turning towards or away from the RGB light as and when it is needed, thousands of times per second. So, if part of the projected image requires no red light, they face away from the light when the colour wheel filter is allowing red light through.

Because the bulk of the action happens in the high-tech ink cartridges, they are priced quite highly in relation to the price of the actual printers (which are often very affordable).

A laser removes the negative charge from certain areas of the drum as it scans across it, creating a neutrally charged copy of the text/image to be printed.

Using a method called additive manufacturing, 3D objects are created by layering a material, layer by layer, from the ground up until the object is completed.

A 3D cutter is similar to a 2D cutter except it is capable of rotating and cutting at many angles. This means that 3D objects can have cuts made to all of its surfaces, unlike 2D cutters that can only cut into a flat 2D surface.

Speakers and headphones aren’t just for music, they also allow us to hear computer warning signals and other people when communicating via voice or video calls.

Actuators are the output devices responsible for creating real world movement. This could range from physically opening automatic shop doors to lowering the landing gears on a plane.

They are often used in a computerised control system, acting upon a signal sent by the microprocessor. Actuators include electric motors, pistons and pumps.

Any peripheral that accepts data from a computer and prints, projects, or reproduces it is known as an output device. The output may be audio, video, hard copy – printed paper, etc. Output devices convert the computer data to human understandable form.

We give input to the computer using input devices and the computer performs operations on the data and displays the output to the user using the output device.

A computer’s principal output device is a monitor, often known as a Visual Display Unit (VDU). It displays the processed data like text, images, videos, audios, etc. It makes images by arranging microscopic dots in a rectangular pattern, known as pixels. The sharpness of an image is determined by the number of pixels. There are two types of monitor viewing screens:

(1) Cathode-Ray Tube (CRT):This type of monitor is based on a cathode ray tube. In which the cathode ray tube generates a beam of electrons with the help of electron guns they strike on the inner surface of phosphorescent of the screen to generate images. The CRT monitor holds millions of phosphorus dotes in three different colors, i.e., red, blue, and green. These dots glow when the beam struck on them and create an image. The main parts of the CRT monitor are the electron gun, fluorescent screen, glass envelope, deflection plate assembly, and base.

(2) Display on a Flat Panel Monitor with a Cathode-Ray Tube (CRT): A flat-panel display is a type of video display with less volume, weight, and power consumption than a CRT. They can be put on the wrist or hang on the wall. Calculators, video games, monitors, laptop computers, and graphical displays all use flat-panel displays.

(3) Plasma Monitor:It is also a flat panel display but it is based on plasma display technology. In a plasma monitor, a small cell is present in between two glass surfaces and these cells contain a solution of noble gases and mercury. So when the electricity supply on the gas present in the cell converts into plasma and produces UV light that creates an image. It is much better than an LCD monitor. The resolution of this monitor is also high up to 1920 x 1920. It has a good contrast ratio, high refresh rate, etc.

Printers are information output devices that allow you to print data on paper. Or in other words, it is an output device that creates a hard copy of the processed data or information. Printers are divided into two categories:

(1) Impact Printer:In impact printers, characters are printed on the ribbon, which is then smashed on the paper. Or we can say that such type of printer uses a print head or hammer to print the data on the paper. Here to print the paper the hammer or print head strikes an ink ribbon against the paper and the character starts printing. Some of the types of impact printers are:Dot matrix printer

(2) Non-Impact Printers:Non-impact printers print characters without the use of a ribbon. These printers are often known as Page Printers because they print a full page at a time. Some of the types of non-impact printers are:Laser printer

A plotter is a device that prints high-quality graphics in a variety of color formats. It works in a similar way to a printer, although it has more advanced features. It is used to print large maps, architectural drawings, large-format printing, and create pictures, 3D postcards, advertising signs, charts, and various designs of the internal structure of building machines, as well as create pictures, 3D postcards, advertising signs, charts, and various designs of the internal structure of building machines.

A projector is a device that allows users to project their output onto a large area, such as a screen or a wall. It can be used to project the output of a computer and other devices onto a screen. It magnifies texts, photos, and movies using light and lenses. As a result, it’s an excellent output device for giving presentations or teaching big groups of people.

A small projector mounted on a back shelf or bookcase, or mounted on the ceiling, takes up no area on the floor. It is barely visible when it is not in use.

Speakers are connected to computers to allow sound to be output. For the working of speakers, sound cards are required. From simple two-speaker output devices to surround-sound multi-channel sets, speakers come in a variety of shapes and sizes. They take audio input from the computer’s sound card and output sound waves as audio output.

To hear the sound, use earbuds with your PC, laptop, or smartphone. It enables you to hear the sound without causing any inconvenience to others. To translate electronic signals into sounds without causing inconvenience to others. They can be wired or wireless and can be connected to computers, laptops, mobile phones, etc. They are connected with the devices via Bluetooth.

Sound cards are computer output devices that are inserted into the computer. A sound card, either external or internal, is required to produce sound on any computer (built-in). An external sound card enables for better overall sound generation and is required for wide and clear sound recording, as well as sound without noise and interference.

Characteristics of Sound Card:To listen speakers or headphones, to play games, watch movies, listen to music, or use audio and video conferencing, we use an internal sound card.

Synthesizers and a variety of electronic musical instruments, such as drums and keyboards, can be connected to your computer using a sound card with standard Musical Instrument Digital Interface (MIDI) connections.

An extension card via which a computer can transfer graphical data to a video display device like a TV, projector, or monitor. It processes photos and video, as well as other functions that the CPU generally does. As they have a good processing capability and video RAM, Gamers utilize video cards.

A speech synthesizer is a computerized device that takes in data, interprets it, and generates audible words. It might be a computer card, a box connected by a cable, or software that works with the computer’s sound card.

The Global Positioning System (GPS) is a radio-based satellite navigation system that uses radio signals to pinpoint a specific position. The sender sends a radio signal to satellites, which collect data such as time, location, speed, and other variables and deliver it to the reception computer for analysis. Because this processed data can be evaluated to obtain information, it is considered as an output device.

The main functioning of a computer system is based on the combined usage of both input and output devices. Utilizing an input device, a user can give directions to the computer to run and the device reverts to the user’s action through an output device. Let’s understand first what is an input unit and output unit.

This part of the computer encapsulates devices with the help of which the user feeds data to the computer. It creates an interface between the user and the computer. The input devices transform the information into a form acceptable by the computer.

This part of the computer encapsulates devices with the help of which the user receives the information from the computer. Output devices transform the output from the computer into a form understandable by the users.

Through this article Input and Output Devices, we shall review the various input and output devices which can be attached to a computer, along with their functions.

A piece of hardware/equipment that enables the user to enter data into a computer is called an input device. Some of the Commonly used input units used in a computer system are as follows:Keyboard

The keyboard is the most basic and very commonly used input device which helps to input data to the computer. The layout of the buttons in a normally used keyboard is similar to the traditional typewriter, but there are a few additional keys provided by different manufacturers for performing additional functions.

Normally available keyboards in the market were of two sizes 84 keys and 101/102 keys, but now keyboards with 104 keys or 108 keys are also possible for Windows and Internet.

These buttons are used to input the numeric data or cursor movement. Normally, it consists of a set of 17 keys that are placed out in a similar configuration practiced by most additional machines and calculators.

The 12 function keys are provided on the keyboard which is arranged in a row at the top of the keyboard. Each of these keys has a different function and is applied for some specific task.

These buttons are used for cursor and screen control. It also adds four directional arrow keys. Following are also included in control keys: Home, End, Delete, Insert, Page Up, Page Down, Control (Ctrl), Escape (Esc)Alternate (Alt).

It is the most commonly used pointing device. It is a very famous cursor-control device and the earlier versions of it were built over a small palm-size box with a round ball at its base, which tracks the movement of the mouse and feeds digital signals to the CPU when the mouse buttons are pressed. Currently, the mouse has a sensor at the bottom to detect cursor position.

Basic versions if it has two buttons called the left and the right-click button and a wheel is present between the buttons to provide a scroll function. The movement of the mouse on a flat surface is used to control the position of the cursor on the display, but it cannot be used to feed text into the system directly.

Just like a mouse, a Joystick is also a pointing device, which is used to travel the cursor position on a display. It is a perpendicular stick having a spherical ball at both lower and upper ends. The spherical ball connected at the circuit having sensors moves in a socket. The joystick controller can be traversed in all directions.

Just like a pen, a light pen is a digital pointing device. This device is used to select an item displayed in the menu or to draw anything on the display. It contains a photocell and an optical sensor placed in a small tube at the tip.

When the light pen tip is traveled on the display, its photocell sensing element calculates the screen location and sends the digital signal to the CPU.

The trackball is another type of input device similar to the mouse. It is most helpful with a notebook or laptop computer, instead of a mouse. It consists of a ball on the top which is half inserted and connected to the sensors. By moving fingers on the ball, the cursor can be moved.

Because the whole device is not moved to move the cursor, a trackball requires less space as compared to the mouse. This device comes in different shapes like a ball, a square, or a button.

The scanner captures high-resolution images from the source which are then converted into a digital format that can be saved on the disk and shared digitally. These digital images can be edited before they are printed.

Digitizer is also called Tablet or Graphics Tablet because it transforms graphics and pictorial data into binary inputs to the system. A special kind of graphic tablet as a digitizer is used for fine works of drawing and image-related applications.

A microphone or mic is a very common input device used to input sound that is then stored in a digital form. Nowadays microphones are used in almost every industry and devices related to sound recording or transmission.

The microphone is used for different applications like adding sound to a multimedia presentation or for mixing music, voice calling and recording, video conferencing, and more.

The MICR input device is commonly seen in banks as there are a huge amount of cheques to be processed every day. The important details like the bank’s code number and cheque number are printed on the cheques with specially designed ink based on the particles of magnetic material that is readable by the sensors of the machine.

This method of reading is recognized as Magnetic Ink Character Recognition (MICR). The main benefits of using MICR are that it is comparatively fast and less prone to errors.

It is an input device that is used to read a printed text similar to the scanner, but the method of reading and the type of output generated is different. The format to be fed to the OCR is predefined and can’t be used as an ordinary scanner.

OCR, unlike a scanner, scans the text optically, character by character, converts them into a machine-readable digital code instead of creating high-resolution images, and stores the text on the system memory.

Bar Code Reader is an input device used to read special format barcoded data (data in the form of light and dark lines). Barcoded data is commonly used to create price tags, in labeling goods, numbering the books, etc. It can be a handheld scanner or can be embedded in a stationary scanner on the tabletop.

A flash of light from the device strikes the surface of the object and reflects the sensors present behind the source of light to collect the input. Bar Code Reader can only scan a bar code image, converts it into an alphanumeric value, which is then transferred to the computer that the bar code reader is connected to.

OMR is a special type of input machine. This sort of optical scanner is used to identify the type of mark made by pen or pencil. It is used where one out of a predefined alternative is to be selected and marked.

A Webcam is a camera that is combined with a computer. Unlike a digital camera, they cannot function independently and should be connected to the computer/laptop for operation. It functions as an input device that can take pictures and is mostly used for video streaming and video conferencing or chatting.

Biometrics relates to a method in which a person is identified through his/her biological features such as fingerprints, facial structure, eye cornea, etc. It is done by using biometric devices, which can be of different types based on their scanning features and abilities, such as Face Scanner, Hand Scanner, Fingerprint Scanner, Retina or Iris Scanner, Voice Scanner, etc.

A piece of hardware/equipment that presents the result of the entered input, once it is processed, is called an output device. Several output devices display output in various ways such as images, text, hard copies, and audio/video. Following are some of the commonly used output devices used in a computer system:

Monitors or Visual Display Unit (VDU), are the primary output devices of a computer system. It generates images from tiny dots, termed pixels that are arranged in a well-defined rectangular form. The depth and sharpness of the image depend upon the number and size of the pixels.

The Cathode-Ray Tube display consists of small picture elements known as pixels. The tinier the pixels, the greater the image clarity or resolution. It requires a very large number of pixels emitting light to create a character.

A limited number of characters can be arranged on a screen at a time. The screen can be categorized into a series of character boxes – a fixed place on the screen where a standard character can be shown. The capability of earlier screens was to display 80 characters of data horizontally and 25 lines vertically.

The flat-panel display is a class of video output devices that have decreased volume, weight, and power requirement as compared to the CRT. It is possible to hang them on walls or wear them on wrists. In everyday evolving technology, uses of flat-panel displays include laptops or computers, calculators, monitors, video games, and graphics displays.

The flat-panel display is categorized into the following two categories:Emissive Displays − Emissive displays panels are output devices that transform electrical energy into light. For instance, plasma panels and LED (Light-Emitting Diodes).

Non-Emissive Displays − Non-emissive displays are based on optical effects to convert sunlight/light from some other source into graphics patterns. For example, LCD (Liquid-Crystal Device).

Character printers are the type of printers that are capable of printing only one character at a time. This states that it does not print one line at a time.

In the earlier days, one of the most commonly practiced printers was the Dot Matrix Printer. These printers were used commonly because of their ease of usage, printing, and affordable printing price. Every character to be printed on paper is created by rearranging a matrix of metallic pins of size (5×7, 7×9, 9×7, or 9×9) at a very fast speed which comes out to create a character which is why it is known as the Dot Matrix Printer.

IN this type of printer the Head is fixed on a wheel and pins creating characters are like petals of Daisy (flower) that is why it is identified as Daisy Wheel Printer. These printers are generally used for word-processing tasks in offices that demand a very low number of letters to be sent here and there with very nice quality.

The head of this printer is in the form of a drum, which is why it is identified as a drum printer. The printing drum surface is divided into several tracks which are equivalent to the size of the paper. For instance, if a paper is of the width of 200 characters, then the drum will have 200 tracks. A fixed character set is embossed on the track which cannot be altered by any means.

To use a different character set, a different drum needs to be purchased like the one with the 48 character set, or the 64 and 96 characters set. A single rotation of the drum containing permanent characters prints a single line. These printers offer fast printing speed and can print 300 to 2000 lines per minute.

In this type of printer, a chain consisting of the character set is used, that is why it is identified as a Chain Printer, or in other words a Chain printer is a line printer that applies a rotating chain to print characters. The predefined-standard character set can have 48, 64, or 96 characters.

Non-impact printers do not hit the paper with any embossed character-containing instrument. These printers can print a complete page all at once, this is the reason why they are also known as Page Printers.

These are very commonly used these days and are a type of non-impact page printer. They use laser lights to charge the metallic drum in the shape of characters or objects to be printed, which attracts powdered ink. Then this drum is pressed over the page to create printed output.

Inkjet printers are also very commonly used printers these days. They use ink cartridges to print characters by spraying small drops of ink in a very precise manner onto the paper. Inkjet printers are very versatile and can produce relatively high-quality output with presentable features.

They make very little noise as compared to other printers because no hammering is done and these have many different modes of printing. Using these printers, color printing is also possible. Some advanced and newer models of Inkjet printers are capable enough to produce multiple number copies of printing also.

A projector is an optical output device that can take images produced by a computer and project or present them onto a screen or surface called a projector. In the older version of projectors, images were created by shining the light through a small transparent lens on the projector; however, the new version of projectors uses laser technology for the same. Projectors are most commonly used in offices, classrooms, auditoriums, theatres to watch presentations, videos, or pictures generated from a computer or laptop.

Computer speakers are the most popular output devices used with a computer to listen to sound. These speakers receive audio as input either in analog or digital form and generate sound as an output. With the advancement of technology, speakers are now available with wireless and BlueTooth facilities as well.

The headphones or earphones or headsets are hardware output tools that are either plugged into the computer or can be wireless. They offer the same function as a speaker, the only difference is the frequency of sound. With speakers, the sound can be detected over a larger distance while utilizing headphones, the sound is only audible to the individual using them. Headphones are available in multiple shapes and sizes.

Simply one can understand Input is data that a computer takes, on the other hand, the output is data that a computer transfers. Computers only work with digital information.

Computer output devices obtain information from the computer and transmit data that has been processed by the computer to the user. Output devices provide data in multiple forms, like audio, visual, and hard copy media.

Input devices: Keyboard, Mouse, JoyStick, Light pen, Track Ball, Scanner, Graphic Tablet, Microphone, Magnetic Ink Card Reader (MICR), Optical Character Reader (OCR) and more.

Monitors, commonly called as Visual Display Unit (VDU), are 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 pixels.

The CRT display is made up of small picture elements called pixels. The smaller the pixels, the better the image clarity or resolution. It takes more than one illuminated pixel to form a 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.

The flat-panel display refers to a class of video devices that have reduced volume, weight and power requirement in comparison to the CRT. You can hang them on walls or wear them on your wrists. Current uses of flat-panel displays include calculators, video games, monitors, laptop computer, and graphics display.

Emissive Displays − Emissive displays are devices that convert electrical energy into light. For example, plasma panel and LED (Light-Emitting Diodes).

Non-Emissive Displays − Non-emissive displays use optical effects to convert sunlight or light from some other source into graphics patterns. For example, LCD (Liquid-Crystal Device).

In the market, one of the most popular printers is Dot Matrix Printer. These printers are popular because of their ease of printing and economical price. Each character printed is in the form of pattern of dots and head consists of a Matrix of Pins of size (5*7, 7*9, 9*7 or 9*9) which come out to form a character which is why it is called Dot Matrix Printer.

Head is lying on a wheel and pins corresponding to characters are like petals of Daisy (flower) which is why it is called Daisy Wheel Printer. These printers are generally used for word-processing in offices that require a few letters to be sent here and there with very nice quality.

This printer is like a drum in shape hence it is called drum printer. The surface of the drum is divided into a number of tracks. Total tracks are equal to the size of the paper, i.e. for a paper width of 132 characters, drum will have 132 tracks. A character set is embossed on the track. Different character sets available in the market are 48 character set, 64 and 96 characters set. One rotation of drum prints one line. Drum printers are fast in speed and can print 300 to 2000 lines per minute.

Non-impact printers print the characters without using the ribbon. These printers print a complete page at a time, thus they are also called as Page Printers.

Inkjet printers are non-impact character printers based on a relatively new technology. They print characters by spraying small drops of ink onto paper. Inkjet printers produce high quality output with presentable features.

They make less noise because no hammering is done and these have many styles of printing modes available. Color printing is also possible. Some models of Inkjet printers can produce multiple copies of printing also.

Output devices of computer are an important part of the computer to use for viewing the user’s input. Users use input devices like keyboards to give instructions to the computer. The computer processes this information. And gives output to the user using these output devices.

In this article, you read about the four important output devices of computers. You can use these devices in your daily work. So you need to be aware of these devices. What are these? and how these devices works?

The monitor is an output device of the computer. It displays user information in the form of pictures, videos, and graphics. The content display on the monitor screen.

It contains one or more electronic guns. We also called it a picture tube. The RGB dots on the screen are called pixels. This RGB is called red green and blue.

It is a type of impact printer. That produces characters and illustrations. Dot-matrix does not produce high-quality output. These types of printers are expensive.

Laser printers are non-impact printers. By using laser, it prints good quality printing material. These are expensive printers. And produced for office use. But now also used in the home.

A thermal printer is also a type of non-impact printer. These types of printers are less costly than other types of printers. Using heat-coated thermochromic paper, known as thermal paper, the printer prints the images.

At the end of this blog, we say that we cover all common output devices of computer. So our concepts about output devices are clear. This will help in our exams or interview.

The original computer monitors utilized cathode-ray tube (CRT) technology. These monitors are still found, but primarily on older computers. CRT monitors were heavy and required considerable desktop space. It is possible to purchase a CRT monitor today, but you will find them primarily on resale or older overstock sites. Purchase of a new desktop now comes only with the newer technology—either liquid crystal display (LCD) or light-emitting diode (LED) and Organic Light Emitting Diode (OLED). We will not focus on the differences in the technology here. Rather, we will focus on the options you have when purchasing a monitor and some of the performance issues involved.

If you are purchasing a laptop PC, your choice of monitor is restricted primarily to size of the unit because the monitor is part of the system case. If you are purchasing a desktop PC or even a monitor that you will link to your laptop, there are some choices beyond size that are available to you. The size of a monitor display is the diagonal measurement from one corner to its opposite. The actual screen display might be a bit less than that, however. Here are some things to consider:

LCD vs. LED monitors. Both types of monitors use backlight to produce the image. LCD monitors use fluorescent light. LED and OLED monitors, which use light-emitting diodes, are considered an advancement over LCD technology.

LED monitors have better picture sharpness and brightness, and the colors are more realistic. LED monitors light-emitting similar to small light bulbs. OLED are light-emitting dioxides across surfaces when supplied by a current. (LED LCD vs. OLED: TV Display Technologies Compared

How much desktop space do you have? Monitors standard sizes range from 17 to 19 inches. Computer users who multi task often utilize dual monitors in use at the same time. Larger monitors are available for purchase.

Mia is equipping her first home office area. She would use a computer for communicating with friends and doing some online research. She has visited the local technology store and looked at monitors and thinks that a standard-sized monitor would be sufficient for her work. Her budget is limited, so she needs to be attentive to the cost of the system. Which type of monitor would you recommend for Mia?

There are many input devices such as a keyboard, mouse, webcam, microphone and more, which send information to a computer system for processing. An output device, like Monitor, printer and more, displays the result of processing generated by input devices. Input devices only work for giving input of data to the system, and output devices accept the output after processing of data from other devices.

One of the main differences between input and output devices is that input devices are ones that are used to give input to the system by the users, whereas output devices are those, which are used to reproduce the output signals for the user.

There are various devices that are used to accept input of data from user or output data generated by a computer; therefore, they are known as input devices or output devices. However, some devices are referred to as Input/output devices, as they can receive input and reproduce output.

For instance, as shown in the above image, a keyboard is an input device, sending an electrical signal to the computer system. A computer system accepts these signals as input, then translates them and produces or displays output to the user on the monitor as text or images. In the lower half of the image, it is also shown that after processing, the computer sends data or output to the printer. Then, once the computer sends output to the printer, it is printed onto the piece of paper that is also considered output.

An input device can receive instructions from users or forward information to another device, but it is not able to accept data from another system. After receiving input, it translates these data into the electrical signals in binary code, which cannot be understandable by humans, and only a digital computer can understand it. There are many examples of input devices, which are discussed below:

Output devices are the section of a computer device that receives data from another device and produces output with the information. Although it cannot send data to another device, it has the ability to forward data from a computer to another computer system. It functions to take data from input devices and translate the digitized signals into a form that can be understandable by users. There are various examples of output devices; some are discussed below:

Monitor: A monitor is a piece of computer hardware that accepts data from a computer (output) and displays it on the system screen through the computer"s video card. Monitors have the ability to display information at a much higher resolution. Additionally, these are much like televisions and also known as video screen, display, video display terminal, or video display unit.

Speakers: The most common output devices, speakers accept sound data from a computer and play the sounds for users to hear. Although speakers can be used with any type of sound system, some speakers are manufactured only for computers. It is a device that cannot receive sound generated by users as well as refer that sound to another device. The main objective of the speakers is to produce sound or audio output for the listener.

Projector: A projector is an output device that accepts data from a computer (output) and projects that data or information as a picture onto a wall or screen or any large surface. It does not have the ability to receive data from a user and also not capable of sending that data to another device. When you are showing video or images to a large group of people, a projector is more beneficial to use instead of a monitor because it displays data on a large surface that can be visible to a large number of people clearly.

An input/output device has the ability to accept data from users or another device (input), as well as forward data to another device (output). Some examples of input/output devices are discussed below:

CD-RW drive and DVD-RW drive: These drives functions for accepting data from a computer as an input to copy onto a writable CD or DVD. And, this data contained on a CD or DVD is sent by the drive to the computer.

Presentation on theme: "Output Devices.  Output devices allow us to receive information from the computer system Monitor (LCD and TFT) Speakers Plotter Printers (Inkjet and."— Presentation transcript: