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Your Interactive Guide to the Digital World

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What Is Output?

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

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What Is Output devices?

  • Output devices are any hardware used to provide or to create output.
  • They translate information that has been processed by the system unit(mainly the CPU) into a form that humans can understand.

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Display devices

Printers

Speakers, headphones, and earbuds

Data projectors

Interactive whiteboards

Force-feedback game controllers

Tactile output

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Display Devices

  • A display device visually conveys text, graphics, and video information
  • The most frequently used output device is the monitor. Also known as display screens, monitors present visual images of text and graphics. Monitors vary in size, shape, and cost

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Display Devices

  • Liquid crystal display (LCD) uses a liquid compound to present information on a display device.
  • Is widely used for older monitors and is typically less expensive.

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Display Devices

  • The quality of an LCD monitor or LCD screen depends primarily on:

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Resolution

Response time

Brightness

Dot pitch

Contrast ratio

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Display Devices

  • The graphics processing unit (GPU) controls the manipulation and display of graphics on a display device
  • LCD monitors use a digital signal and should plug into a DVI port, an HDMI port, or a DisplayPort

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Display Devices

  • Plasma monitors are display devices that use gas plasma technology and offer screen sizes up to 150 inches

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Display Devices

  • Televisions also are a good output device
    • Require a converter if you are connecting your computer to an analog television
  • Digital television (DTV) offers a crisper, higher-quality output
  • HDTV is the most advanced form of digital television

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Printers

  • A printer produces text and graphics on a physical medium
    • Printed information is called a hard copy, or printout
    • Landscape or portrait orientation

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Printers

  • A nonimpact printer forms characters and graphics on a piece of paper without actually striking the paper

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Ink-jet printers

Photo printers

Laser printers

Thermal printers

Mobile printers

Label and postage printers

Plotters

Large-format printers

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Printers

  • An ink-jet printer forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper
    • Color or black-and-white
    • Printers with a higher dpi (dots per inch) produce a higher quality output

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Printers

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A photo printer produces color photo-lab-quality pictures

    • Most use ink-jet technology
    • PictBridge allows you to print photos directly from a digital camera
    • Print from a memory card and preview photos on a built-in LCD screen

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Printers

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Laser printer

High-speed

High-quality

Color

Black-and-white

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Printers

  • A multifunction peripheral (MFP) is a single device that prints, scans, copies, and in some cases, faxes
    • Sometimes called an all-in-one device

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Printers

  • A thermal printer generates images by pushing electrically heated pins against the heat-sensitive paper

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Thermal wax-transfer printer

Dye-sublimation printer

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Printers

  • A mobile printer is a small, lightweight, battery-powered printer that allows a mobile user to print from a notebook computer, smart phone, or other mobile device

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Printers

  • A label printer is a small printer that prints on adhesive-type material
  • A postage printer prints postage stamps
    • Postage also can be printed on other types of printers

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Printers

  • Plotters are used to produce high-quality drawings
  • Large-format printers create photo-realistic quality color prints on a larger scale

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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

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Dot-matrix printer

Line printer

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Printers

  • A dot-matrix printer produces printed images when tiny wire pins on a print head mechanism strike an inked ribbon
  • A line printer prints an entire line at a time

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Speakers, Headphones, and Earbuds

  • An audio output device produces music, speech, or other sounds

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Most computer users attach speakers to their computers to:

    • Generate higher-quality sounds for playing games
    • Interact with multimedia presentations
    • Listen to music
    • View movies

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Speakers, Headphones, and Earbuds

  • Headphones are speakers that cover or are placed outside of the ear
  • Earbuds (also called earphones) rest inside the ear canal

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Speakers, Headphones, and Earbuds

  • Some speakers are specifically designed to play audio from a portable media player
    • Wireless speakers

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Speakers, Headphones, and Earbuds

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Voice output occurs when you hear a person’s voice or when the computer talks to you through the speakers

    • Some Web sites dedicate themselves to providing voice output
    • Often works with voice input
    • VoIP uses voice output and voice input

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Other Output Devices

  • Other output devices are available for specific uses and applications

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Data projectors

Interactive whiteboards

Force-feedback game controllers

Tactile output

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Other Output Devices

  • A data projector is a device that takes the text and images displaying on a computer screen and projects them on a larger screen
    • LCD projector
    • Digital light processing (DLP) projector

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Other Output Devices

  • An interactive whiteboard is a touch-sensitive device, resembling a dry-erase board, that displays the image on a connected computer screen

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Other Output Devices

  • Force-feedback sends resistance to the device in response to actions of the user
  • Tactile output provides the user with a physical response from the device

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Summary

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Various methods of output

Several commonly used output devices

Display devices, printers, speakers, headphones, earbuds, data projectors, interactive whiteboards, force-feedback game controllers, and tactile output