Find out inside pcmags comprehensive tech and computer related encyclopedia. Inputoutput devices alona sorin seminar in computer science 236801 typewriter 9qwerty, christopher sholes 952% q w e r t y u i o p 32% a s d f g h j k l. List of input devices, output devices and both input output. Apr 10, 2017 output devices in all applications allow you to display, print, or otherwise present the results of your program to anyone, period, who is not, in fact, inside the memory core of the computer. Output devices projector an output device that can take the display of a computer screen and project a large version of it onto a flat surface. Computer graphics notes pdf cg notes pdf smartzworld. What is the difference between an input and output device. Input devices data glovepolhemus a modern attempt to provide the user with more degrees of freedom common in virtual reality applications polyhemus can provide six degrees of freedom rotation and translation head mounted display although primary a display device, it can also track position and orientation like polhemus space ball six degrees of freedom sphere. Computer graphics notes pdf cg notes pdf free download.
Can you give an example of input and output for a computer. Pdf input output storages devices in computers researchgate. They are divided into two categories 1 manual input devices devices that. Input devices that read printed text and graphics and transfers them to a computer in digital form data is typically input as a single image can scan photos, documents, images types of scanners flatbed portable 3d receipt and business card scanners understanding computers. In this case, the computer tells the graphics card what colors to paint at specific points on the monitor. In computing, inputoutput refers to the communication between aninformation processing system such as a computer, and the outside world.
Input and output devices input and output devices joseph j. Input and output devices people at vt computer science. A touch screen is an inputoutput touchsensitive display. Here i am going to share you about list of basic input devices, output devices and both inputoutput devices. Input devices pointing devices keyboard optical input devices audio input device video inpu device. Inputoutput devices are required for users to communicate with the computer. List of input devices, output devices and both input. Input devices various hardware devices have been developed to enable the user to interact in the more natural manner. Although there is no general agreement on the exact meaning of the term interaction technique, the most popular definition is from the computer graphics literature. Today we are going to discuss these devices in detail. The following is a list of the most common input devices which are nowadays found in a computer system. For example, below is a basic list of steps of how an output device works.
Input devices data glovepolhemus a modern attempt to provide the user with more degrees of freedom common in virtual reality applications polyhemus can provide six degrees of freedom rotation and translation head mounted display although primary a display device, it can also track position and orientation like polhemus space ball. Monitors are very similar to televisions but usually display information at a much higher resolution. In my opinion, i think all the unit of computer component are important and their own role in getting a computer system unit to function. The terms input and output are used both as verbs to describe the process of entering or displaying the data, and as nouns referring to the data itself entered into or displayed by the computer. Output devices in all applications allow you to display, print, or otherwise present the results of your program to anyone, period, who is not, in fact, inside the memory core of the computer. Text consists of characters letters, numbers, punctuation marks, or any other symbol requiring one byte of computer storage space that are used to create words, sentences, and paragraphs. While the devices whose main function is to give instructions and data to the computer are called input devices. The digitized pad is useful in converting graphic input, such as charts, graphs, and blueprints into patterns that can be manipulated and stored by the computer. Input devices only allow for input of data to a computer and output devices only receive the output of data from another device. A graphic tablet as digitizer is used for doing fine works of drawing and image manipulation applications. It is generally used with engineering applications, and essentially draws a given image using a series of straight lines. Keyboard and mouse are the most commonly used input devices.
The monitor displays the video and graphics information generated by the computer through the video card. Using a computer may seem an easy task because of the tools that are attacked with the device and helps in managing the system properly. Introduction, application areas of computer graphics, overview of graphics systems, videodisplay devices, rasterscan systems, random scan systems, graphics monitors and work stations and input devices. The computer transmits data to the drive, where it is saved and can be later accessed. Some types of output are text, graphics, tactile, audio, and video. Chapter 4 input and output oakton community college. But when it comes to know about them and how they work, such devices are categorized as input and output devices. Dec 14, 2010 here i am going to share you about list of basic input devices, output devices and both inputoutput devices related to computer. In my last post i have shared about the following job recruitment questions on basic computer technology and internetjob recruitment questions on basic computer technology and internet part1. From the computer s perspective, an interaction technique involves. Dec 29, 2016 an input devices converts the data and instructions into binary form that computer can understand. It can be text, graphics, tactile, audio, and video.
Devices input and output unit 4 input output devices. Thanks to advances in computer graphics hardware and algorithms, virtually all new desktop machines available today have sophisticated fullcolor displays with. This transformation is performed by input interface. Input device is a device through which data and instruction are entered into computer system. This is to help you have a basic idea about input and output devices. D student brown university, department of computer science providence, rhode island lead consultant and founder. Central processing unit carries out the basic operations or. Projectors are often used in meetings and presentations so that everyone in the room can view the presentation. Download computer graphics notes pdf cg notes pdf and materials. Nov, 2018 an input device sends information to a computer system for processing, and an output device reproduces or displays the results of that processing. Some commonly used input output devices are listed in table below.
Computer inputoutput ports and interfaces 1 terms and abbreviations. Application areas of computer graphics, overview of graphics systems, videodisplay devices, rasterscan systems, random scan systems, graphics monitors and work stations and input devices. Output devices output devices display information in a way that you can you can understand. They are locators and selectors a joystick has two potentiometers, they have been attached to a single lever. The devices which are used to input the data and the programs in the computer are known as input devices. They can be used by the computer to create a picture of whatever the camera had been pointed at. Current uses of flatpanel displays include calculators, video games, monitors, laptop computer, graphics display. The design is sent to the plotter through a graphics card, and the design is formed by using a pen. Pdf assinment find, read and cite all the research you need on researchgate. The flatpanel display is divided into two categories. A track ball comes in various shapes like a ball, a button and a square.
Some of the output devices are visual display units vdu i. Job interview questions on basic computer technology and internet part2. The computer will be of no use unless it is able to communicate with the outside world. The input devices are the hardware that is used to transfer transfers input to the computer. Before a computer can process your data, you need some method to input the data into the machine. Getting the right input devices for your computer system can make a world of difference in your computers performance and can improve the quality of your time spent at the screen. Emissive displays the emissive displays are devices that convert electrical energy into light. The device you use will depend on what form this data takes be it text, sound, artwork, etc.
Input devices o level computer science 2210 prepared by. A general graphics programming package provides an extensive set of graphics functions that can be used in highlevel programming languages. These examples of output devices also include inputoutput devices. Output devices monitor the device which displays computer output. What are graphical input and output devices in a computer. With the right program and information, the computer will input graphics information mouse, digitizer, distance. Most devices are only input devices or output devices, as they can. Output can be text, numeric data, line, polygon, and other objects. Find out inside pcmags comprehensive tech and computerrelated encyclopedia. This is a ball which is half inserted and by moving fingers on ball, pointer can be moved. It can be text, graphics, tactile, audio, and video some of the output devices are visual display units vdu i.
Brown university compter graphics lab input and output devices for 3d interaction joseph j laviola jr ph. An input device that allows you to scan in images, posters, photographs etc. Depending on whether the image resolution is fixed, it may be of vector or raster type. Below we discuss the variety of peripheral devices used for computer input and output. Without any input devices, a computer would only be a display device and not allow users to interact with it. Monitors graphic plotter printer 992019 designed by. What is the purpose of output devices in computer graphics. Example gl graphics library system on silicon graphics equipment. The data entered through input device can be some text, some graphical image or symbol, sound etc, depending on the form of the raw data the various input devices are available. The devices that are used to display the information of the results are known as output devices. How do you ever wonder how information gets in your computer and how comes out in a form you can use. Pdf computer input and output devices ingamule siraji. One or several input devices that capture user input. Output device can produce the final product of machine processing into a form usable by humans.
Input devices input devices any peripheral piece of computer hardware equipment used to provide data and control signals to a computer. Devices input devices keyboard mouse scanner joystick microphone digital. These examples of output devices also include input output devices. Input devices a keyboard it is a text base input device that allows the user to input alphabets, numbers and other characters. Io devices before delving into the main content of this part of the book on persis. Inputs are the signals or data received by the system, and outputs are the signals or data sent from it.
About input and output devices some examples of input and output devices lesson 2 input and output devices input devices allow us to send information to the computer. Input devices it is an electromechanical device that can be used to enter data and instructions to the computer. Input devices there are several ways to get new information or input into a computer. On a computer keyboard input device, if you type h, it sends inputs a signal to the computer. An input device is a piece of computer hardware equipment used to provide data and. In computing, input output refers to the communication between aninformation processing system such as a computer, and the outside world. An input devices converts the data and instructions into binary form that computer can understand. Inputoutput devices dont only produce output, but can also be used as storage and input devices. Output devices are used to display the result or information on the computer. A input device that allows you to draw on a screen with greater positional accuracy, similarly to how you would on a graphics tablet. A joystick is an input device consisting of a stick that pivots on a base and reports its angle or direction to the device it is controlling. Computer graphics pdf computer graphics book pdf notes starts with the topics covering introduction of computer graphics.
Clearly, for computer systems to be interesting, both input and output are required. Graphics software two classifications general programming package specialpurpose application package. Digitizer is also known as tablet or graphics tablet because it converts graphics and pictorial data into binary inputs. Unless a computer has graphics capability built into the motherboard, that translation takes place on the graphics card. Input and output unit 4 input output devices devices. An input device is any hardware component that allows a user to enter data and instructions into a computer. Examples of io devices are cd drives, dvd drives, usb drives, hard disk drives hdds, and floppy disk drives. Inputoutput devices and interaction department of computer. These input output devices are also known as peripherals since they surround the cpu and memory of a computer system. Since the whole device is not moved, a track ball requires less space than a mouse. Input and output devices used for computer graphics. Joysticks are often used to control video games, and usually have one or more pushbuttons whose state can also be read by the computer. An output device works by receiving a signal from the computer and using that signal to perform a task to display the output.
An interaction technique is a way of using a physical inputoutput device to perform a generic task in a humancomputer dialogue. The jo ystick is a vertical stick which moves the graphic cursor in a. Input devices are used to input information to computers while output device transmit information to one or more users. Microphone gives sound or voice input to the computer. Thus, a computer must have a system to receive information from the outside world and must be able to communicate results to the external world. Difference between input devices and output devices. Input devices output devices keyboard mouse joystick scanner light pen touch screen monitor lcd printer plotter ii.
Input devices input is any data or instructions entered into the memory of a computer. Jan 05, 2017 input devices are used to give data and instructions to the computer. Input is any data or instructions entered into the memory of a computer. Monitor and the printer are the commonly used output devices. Input and output unit or input and output device io provide a way to interact with a computer. Printers and visual displays are the most common type of output. An output device is any piece of computer hardware equipment which converts information into humanreadable form. Data that has been processed into a useful form, called information p.
Feb 10, 2017 for graphical output, the routines in the computer convert the x,y position, plus the r,g,b color sequences to points on a monitor. The monitor displays the video and graphics information generated by the computer. An interaction technique is the fusion of input and output, consisting of all software and hardware elements, that provides a way for the user to accomplish a task. Fahad khan an input device is a piece of hardware that is used to enter data into a computer. Track ball is an input device that is mostly used in notebook or laptop computer, instead of a mouse. Input devices as well as output devices are a neccessity in order to. In simple terms, input devices bring information into the computer and output devices bring information out of a computer system. Output device display data from the memory of the computer. The data can be in the form of text, graphics, sound, and text. Example glgraphics library system on silicon graphics equipment. Clearly, for computer systems to be interesting, both. Nov 16, 2019 an output device works by receiving a signal from the computer and using that signal to perform a task to display the output.
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