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Chapter 6: Output. Slides Created by Kevin McHale. The Four Categories of Output. Output is data that has been processed into a useful device Four Categories Text Graphics Audio Video. CRT Monitors .

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Chapter 6 output l.jpg

Chapter 6: Output

Slides Created by

Kevin McHale

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The Four Categories of Output

  • Output is data that has been processed into a useful device

  • Four Categories

    • Text

    • Graphics

    • Audio

    • Video

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CRT Monitors

  • Desktop monitors that are similar to televisions because they contain Cathode Ray Tubes (CRT)

  • Available in a variety of sizes

    • Most common range from 15 to 22 inches

  • Use electron beams to produce images

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Quality of CRT Monitor

  • Three factors affect the monitor’s quality

    • Resolution

    • Dot Pitch (Pixel Pitch)

    • Refresh Rate

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Graphics Cards

  • Converts digital output from the computer into an analog video signal

  • Sends the signal through a cable to the CRT monitor

  • Monitor displays the

    output on the screen

  • The number of colors a graphics card displays is determined by its bit depth

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Flat Panel Display

  • A flat panel display is a display with a shallow depth that does not use CRT technology

  • Types of flat panel displays

    • Flat panel monitors

    • LCD displays

    • Gas Plasma displays

    • HDTV displays

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Flat Panel Displays

  • A flat panel monitor is a desktop monitor that uses a liquid crystal display instead of a cathode-ray tube

  • A liquid crystal display (LCD) uses a liquid compound to present information on a screen

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Gas Plasma Displays

  • A gas plasma display uses gas plasma technology

  • Substitutes a layer of gas for the liquid crystal material in a flat panel monitor

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High-Definition Television

  • HDTV is the most advanced form of digital television

    • Provides resolution up to 1920 x 1080 pixels

    • Works with digital broadcasting signals

    • Transmits digital sound

    • Supports wide screens

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  • A printer is an output device that produces text and graphics on a physical medium

  • Two types of printers

    • Impact Printers

    • Nonimpact Printers

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Impact Printers

  • Impact printers form characters and graphics on a piece of paper by striking a mechanism against an inked ribbon that physically contacts the paper

  • Types of Impact Printers

    • Dot-matrix printer

    • Line printer

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Nonimpact Printers

  • Nonimpact printers form characters and graphics on a piece of paper without actually striking the paper

  • Types of nonimpact printers

    • Ink-jet printers

    • Laser printers

    • Photo printers

    • Large format printers

    • Thermal printers

    • Portable printers

    • Label and postage printers

    • Plotters

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Nonimpact Printers

  • An ink-jet printer forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper

  • A photo printer produces

    photo-lab –quality pictures

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Nonimpact Printers (Cont)

  • A laser printer is a high-speed, high-quality printer that creates images using a laser beam and powdered ink, called toner

  • A thermal printer generates images by pushing electronically

    heated pins against heat

    sensitive paper

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Nonimpact Printers (Cont)

  • A portable printer is a small, lightweight, battery-powered printer used for notebook computers

  • A label printer is a small

    printer that prints on an

    adhesive-type material

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Nonimpact Printers (Cont)

  • Plotters are sophisticated printers used to produce high-quality drawings

  • A large-format printer uses ink-jet technology on a large scale to create photo-

    realistic-quality color prints

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Wireless Printing Technology

  • Infrared Printing

    • A printer communicates with a device using infrared light waves

  • Bluetooth Printing

    • A device transmits output to a printer via radio waves

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Audio Output Devices

  • Audio output devices are components of a computer that produce sound

  • Types of Audio Output Devices

    • Speakers

    • Headphones

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  • A fax machine (facsimile machine) is a device that transmits and receives documents over telephone lines

    • A fax is a document sent or received

  • Fax modems allow you

    to send and sometimes

    receive electronic

    documents as faxes

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Other Output Devices

  • Multifunction peripherals provide the functionality of a printer, scanner, copy machine, and a fax machine

  • Data projectors take the image

    form a computer screen and project

    it onto a larger screen for an audience

    to view

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Output Options

  • Hearing impaired users can instruct programs to display words instead of sound

  • Visually impaired users can enlarge items on the screen and change settings to increase readability

  • Blind users can work with voice output instead of a monitor and Braille printers