Output Devices Of Computer System?
Category: COMPUTER SCIENCE | 13th March 2024, Wednesday
Output Devices Receive Information From The CPU And Present It To The User In The Desired Form. Some Of The Output Devices Are Monitor, Printers, Plotters, Etc. Let Us Now Learn Each Of Them In Detail.
Output Devices Are Peripheral Devices Of A Computer System That Receive Data From The Computer And Present It To The User In A Human-readable Form. These Devices Facilitate Communication Between The User And The Computer By Conveying Processed Information In Various Formats. Common Output Devices Include Monitors, Printers, Speakers, And Projectors.
Monitors, Also Known As Display Screens Or Visual Display Units (VDUs), Visually Represent Data, Images, And Videos Generated By The Computer's Graphics Card. They Come In Various Types, Such As CRT (cathode-ray Tube), LCD (liquid Crystal Display), And LED (light-emitting Diode), Each Offering Different Features And Display Qualities.
Printers Produce Hard Copies Of Digital Documents, Images, Or Graphics On Paper Or Other Media. They Come In Various Types, Including Inkjet, Laser, And Dot Matrix Printers, Each Suited To Different Printing Needs In Terms Of Speed, Quality, And Cost-effectiveness.
Speakers And Headphones Reproduce Audio Output From The Computer, Allowing Users To Listen To Music, Watch Videos, Or Hear System Alerts And Notifications.
Projectors Display Images Or Videos On A Large Screen Or Surface, Commonly Used For Presentations Or Entertainment Purposes In Settings Such As Classrooms, Boardrooms, Or Home Theaters.
Overall, Output Devices Play A Crucial Role In Enabling Users To Interact With Computers By Presenting Processed Information In A Comprehensible And Usable Format.
Monitor
The Monitor Is Just Like A Television Screen And It Is Used To Display Data And Information. When Some Data Or Instruction Is Being Keyed In, The Monitor Displays The Characters Being Typed. The Monitors Are Available In Various Sizes. They May Also Differ For Different Types Of Computers. The Standard Size Is 24 Lines By 80 Characters. The Output Displayed On The Monitor Is Called Soft Copy. Monitor Is Also Called As Visual Display Unit.
There Are Two Types Of Monitors – CRT And TFT-LCD Monitors.
CRT Monitor: CRT (Cathode Ray Tube) Monitor Is A Relatively Older Type Of Monitor. It Is Rarely Being Used Today. These Were Bigger And Bulkier Monitors And Hence Took Lot Of Desk Space. They Also Consumed Lot Of Electricity.
TFT-LCD Monitors: TFT Stands For Thin Film Transistor And LCD Stands For Liquid Crystal Display. These Monitors Are Lighter And Occupy Less Space. They Are Also Commonly Referred To As Flat Screen Displays And Consume Much Less Electricity Than CRT Monitors. Now-a-days Even LED (Light Emitting Diode) Monitors Are Being Used.
Printer
You Must Have Used Printer For Taking Printouts. Printer Is A Device That Produces The Output On Paper. Such An Output Is Also Known As Hard Copy And It May Be In The Form Of Text Or Graphics. There Are Many Different Types Of Printers. These Printers Vary In Terms Of Size, Speed And Quality Of Output. Some Of Them Are Discussed Below:
Dot Matrix Printer : It Is A Type Of Printer That Uses A Print Head To Print Characters On Paper. The Print Head Moves In Back And Forth Or Up And Down Motion On The Page. The Print Head Strikes On An Ink Soaked Cloth Ribbon That Is Laid Against A Paper. The Characters Formed From Dots Are Thus Printed On The Paper.
Ink-jet Printer: Ink-jet Printers Work By Spraying Ionized Ink On A Sheet Of Paper. Magnetized Plates In The Ink’s Path Direct The Ink Onto The Paper In The Desired Shapes. Ink-jet Printers Are Capable Of Producing A Better Print Than The Dot Matrix Printers.
A Typical Ink-jet printer Provides A Resolution Of 300 Dots Per Inch, Although Some Newer Models Offer Higher resolutions. These Are Also Known As Line Printers as The Output Is Produced Line By Line. In General, The Price Of Ink-jet Printers Is Lower Than That Of Laser Printers.
However, They Are also Considerably Slower. Another Drawback Of Ink-jet Printers Is That They Require A Special Type Of Ink That Is Apt To Smudge On Inexpensive Copier Paper. Since Ink-jet Printers Require Smaller Mechanical Parts Than Laser Printers, They Are Especially Popular As Portable Printers. In Addition, Colour Ink-jet Printers Provide An Inexpensive Way To Print Full-colour Documents.
Laser Printer: It Works On The Principle Of A Photocopier. It Utilizes A Laser Beam To Produce An Image On A Drum. The Light Of The Laser Alters The Electrical Charge On The Drum Wherever It Hits. The Drum Is Then Rolled Through A Reservoir Of Toner, Which Is Picked Up By The Charged Portions Of The Drum. Finally, The Toner Is Transferred To The Paper Through A Combination Of Heat And Pressure.
Since The Entire Page Is Transmitted To A Drum Before The Toner Is Applied, Laser Printers Are Sometimes Called Page Printers. In Addition To Text, Laser Printers Are Very Adept At Printing Graphics. However, You Need Significant Amounts Of Memory In The Printer To Print High-resolution Graphics.
The Speed Of Laser Printers Ranges From About 4 To 20 Pages Of Text Per Minute (ppm). A Typical Rate Of 6 Ppm Is Equivalent To About 40 Characters Per Second (cps).
Thermal Printer: Thermal Printers Are Printers That Produce Images By Pushing Electrically Heated Pins Against Special Heat-sensitive Paper. Thermal Printers Are Inexpensive And Are Used In Most Calculators And Many Fax Machines. They Produce Low-quality Print, And The Paper Tends To Curl And Fade After A Few Weeks Or Months.
Plotter
A Plotter Is A Device That Is Used To Draw Charts, Graphs, Maps Etc., With Two Or More Automated Pens. Multi-colour Plotters Use Different-coloured Pens To Produce A Multi-coloured Output.
Different Types Of Plotters Are Available In The Market. A Drum Plotter Has A Paper Wrapped Around A Moving Drum And The Pens Move On The Paper To Print The Output. A Flatbed Plotter Has A Flat Surface On Which The Paper Is Placed And The Pens Move To Draw The Output.
An Electrostatic Plotter Has A Negatively Charged Paper On Which The Drawing Is Made Using A Positively Charged Toner. Plotters Are Considerably More Expensive Than Printers. These Were The First Of The Devices That Could Print Full Sized Engineering Drawings With Colour. They Are
frequently Used For Computer Aided Engineering (CAE) Applications Such As Computer Aided Design (CAD) And Computer Aided Manufacturing (CAM).
Speakers
The Speakers Are Used To Produce Audio Output. The Computers Have Sound Cards That Enable The Computer To Produce Audio Output Through The Speakers.
Now-a-days, 3D Audio Is A Technique For Giving More Depth To Traditional Stereo Sound. Typically 3D Sound Or 3D Audio Is Produced By Placing A Device In A Room With Stereo Speakers.
The Device Dynamically Analyses The Sound Coming From The Speakers And Sends Feedback To The Sound System So That It Can Read Just The Sound To Give The Impression That The Speakers Are Further Apart.
3D Audio Devices Are Particularly Popular For Improving Computer Audio Where The Speakers Tend To Be Small And Close Together. There Are A Number Of 3D Audio Devices That Can Be Attached To A Computer’s Sound Card.
Tags:
Output Devices, Speaker, Printer, Monitor, Output Devices Of Computer System
