Output By Vanessa Snyder What is Output Definition

Output By: Vanessa Snyder

What is Output? • Definition: – Data that has been processed in the form of information • Types: – Text • Characters that makeup words and sentences – Graphical Image • Digital representation of information that is not text – Audio • Enhance understanding through sound – Video • Full-motion images

Display Devices: • Definition: – Output device that conveys graphics, text and video information • Soft Copy is information that is displayed on a display device • Basic Parts: – Screen • Definition: – Projection surface – Monitor • Definition: – Plastic or metal case that houses the screen * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Display Devices Continued… • Monochrome: – Definition: • Information is displayed on one color and on a different colored background • Gray Scaling: – Definition: • Information is displayed using many shades of gray from white all the way to black. – This provides better contrast * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Types of Monitors: • CRT Monitors • LCD Monitors • Gas Plasma Monitors * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

CRT Monitors: • Definition: – A monitor that contains a cathode ray tube • Cathode ray tube (thus, CRT) is a large, sealed, glass tube – Every dot on the screen consists of phosphor material • There is a red, a green • Basic Terminology: – Viewable Size: • Diagonal measurement of the actual viewing area that is provided by the monitor – Pixel: • Short for picture element • Single point in an electronic image and a blue phosphor * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

LCD Monitors: • Liquid Crystal Display (thus LCD) contains liquid crystals instead of a cathode ray tube. • Flat-Panel Display has a lightweight, compact screen – Consumes one-third the power of a CRT * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

LCD Displays: • Web-enabled device: – Provides access to the web and/or e-mail • Electronic book (e-book): – Compact computer that allows you to “mark” text • Clear. Type – Technology developed to make on-screen reading as natural feeling as possible * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

LCD Displays Continued… • Use: – Active-matrix display, a. k. a. thin-film transistor display (TFT), which can use a separate transistor for each color pixel. • Organic TFT, a. k. a. organic LED (OLED), uses organic molecules to produce a brighter display • This is the most powerful because many transistors are used – Passive-matrix display, a. k. a. dual-scan display, requires less power and uses fewer transistors • High-performance addressing (HPA) provides a less expensive alternative. * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Gas Plasma Monitors: • Definition: – Flat-panel display that uses gas plasma technology • Offers larger screen sizes and higher display quality * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Quality of Display Devices: • Quality of CRT depends on: – Resolution – Dot pitch • A. k. a. pixel pitch; the distance between each pixel on the display – Refresh rate • A. k. a. vertical frequency/scan rate; speed that the monitor redraws the images on the screen • Quality of LCD depends on: – Resolution • Sharpness and clearness of an image – Super Video Graphics Array (SVGA) supports resolutions and colors – Measured in hertz (number of times per second that the screen is redrawn) * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Monitor Ergonomics: • Goal: – To incorporate comfort, efficiency and safety • Electrostatic radiation (EMR) – Magnetic field that travels at the speed of light • Complies with MPR II standards – LCD monitors do not emit any kind of electromagnetic radiation—only CRT monitors do • ENERGY STAR program: – Program that encourages manufacturers to create energy-efficient devices * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Printers: • Definition: – Output device that produces text and other graphics on a medium which is known as a hard copy or a printout • Orientations: – Portrait – Landscape * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Printers Continued… • Types: – – Impact Printers Nonimpact Printers Photo Printers Label and Postage Printers – Portable Printers – Plotters and Large. Format Printers * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Printers Continued… – Impact Printers: • Strikes a mechanism against an ink ribbon – Different qualities of print: v Letter Quality v Near Letter Quality • Dot-Matrix Printers – Tiny pins on a print head mechanism strike an inked ribbon – Use continuous-form paper in which each sheet of paper is connected • Line Printers – High-speed impact printer that prints an entire line at a time – Shuttle-matrix printer moves a series of print hammers back and forth horizontally at high speeds * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Printers Continued… • Nonimpact Printers: – Forms characters and graphics without actually striking the paper – Types: • Ink-Jet Printers: – Forms characters by spraying tiny drops of ink • Laser Printers: – High-quality nonimpact printer that uses individual sheets of paper stored in a removable tray that slides into the printer case v Page Description Language (PDL) tells the printer how to lay out the material * PCL (Printer Control Language) supports standard fonts and layouts * Post. Script is designed for complex documents • Thermal Printers: – Generates images by pushing electronically heated pins against heat-sensitive paper • Thermal wax-transfer • printer, a. k. a. thermal transfer printer, uses heat to melt colored wax on heatsensitive paper Dye-sublimation printer, a. k. a. thermal dye transfer printer, uses heat to transfer color dye to specially coated paper. * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Printers Continued… • Photo Printer – Color printer that can produce graphical images on mediums • Label and Postage Printer: – Small printer that contains an adhesive material * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Printers Continued… • Portable Printers – Small, lightweight printer that allows mobile users to print from a handheld or notebook while traveling • Plotters and Large-Format Printers – Sophisticated printers that produce high quality drawings • Large-format printer creates realistic quality prints * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Speakers and Headsets: • Audio Output Devices that produce sound – Two common uses are: • Speakers: – Generate sound v Woofer, a. k. a. subwoofer, boosts low sounds • Headsets: – Allows the individual to hear the generated sound * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Other Output Devices: • Data Projectors: – Device that takes the image from a computer screen and projects it to a larger screen • LCD Projectors use liquid crystal technology and uses a light source to display the information on a computer screen • Digital light processing (DLP) Projector use tiny mirrors to reflect light * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Other Output Devices Continued… • Facsimile (fax) machine: – A device that transmits and receives documents over telephone lines • Fax modem is a modem that also allows an individual to send and receive electronic documents as faxes • Multifunction Devices (MFD): – A single piece of equipment that looks like a copy machine but is also a printer • Multifunctional Peripherals (MFPs), a. k. a. all-in-one devices, vary widely in function * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Terminal: • Definition: – A device that performs both input and output because it consists of a monitor, keyboard and video card, which is also called a graphics card because it converts digital output from the computer into an analog video signal • There are three categories of terminals: – Dumb terminals – Intelligent terminals – Special-purpose terminals * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Terminals Continued… • Dumb terminal: – No processing power; thus, not an independent device • Intelligent terminal a. k. a. programmable: – This contains both memory and a processor in addition to the monitor and keyboard – Can perform some functions independent of the host computer • Special-purpose terminal: – Perform specific tasks and contain features for a particular industry * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Terminals Continued… • Special-purpose terminal: – Point-of-sale (POS) terminal records purchases – Automated teller machine (ATM) is a selfserving banking machine that connects to a host computer through a network • Personal Identification (PIN) allows an individual to access of his or her savings account. * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Output Devices for Physically Challenged Users • Size of color of the text can be changed for the • • challenged The blind can utilize the voice output Braille Printer – Outputs information in Braille * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

Conclusion: • Data, unprocessed facts, is organized into information that can be broken down into input and output. – The data can be further broken down into more specific parts ranging from projectors to multifunctional devices and so on. * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat

THE END * Information was gathered from Discovering Computers 2003 by Shelly Cashman Vermaat