TOPIC 2: OUTPUT DEVICES

What is Output Devicesâť“

It is used to received information from the computer either in Soft Copy or Hard Copy.

Examples

Speaker

Monitor

Plotter

Projector

Headphone

Printer

Audio & Video Devices

Audio

Video

  • used to translates audio information from the computer into sounds that people can understand

Example: speakers & headphone

  • used to entering full motion recording into a computer

Example: digital camera, webcam & video capture

Image Capturing Device

Digital Camera

  • Images record digitally on a disk.
  • Images can be downloaded to a computer.

Digital Video Camera

  • Record motion digitally.
  • Can take still images as well.

Webcam

...specialized digital video camera and broadcast images
over internet

Printers

  • Output device that produces text and graphics on paper.
  • Result is hard copy, or printout.
  • Portrait & landscape.

Dot-matrix Paper

  • Impact printer that produces images when tiny wire pins strike ribbon.
  • Forms characters by striking mechanism against inked ribbon that contacts paper.

Line Printer

  • High-speed impact printer that prints entire line at a time.
  • Speed measured in lines per minute (1pm).
  • Band printer prints fully formed characters using hammer mechanism.

Ink-jet Printer

  • A type of nonimpact printer that sprays tiny drops of liquid ink onto paper (forms characters & graphics without striking paper).
  • Prints in black-and-white/color on a variety of paper types.

Laser Printer

  • High speed, high quality nonimpact printer.
  • Prints text and graphics in very high quality resolution, ranging from 600 to 2400 dpi.
  • More cost than ink-jet printer, but more faster.

Thermal Printer

  • Generates images by pushing electrically heated pins against heat-sensitive paper.
  • Dye-sublimation printer (photo printer)

Mobile Printer

  • Small, lightweight, battery-powered printer that allows mobile user to print from notebook computer, table PC or PDA while travelling.

Plotter Printer

Label Printer

  • Small printer that prints on adhesive-type material.
  • Most also print bar codes.
  • Postage printer that built in digital scale & prints postage stamps.
  • Sophisticated printer used to produce high quality drawings.
  • Creates photo-realistic-quality color prints.

Display Devices

  • Output device that visually coveys information.
  • Monitor houses display device as separate peripheral.

Cathode-Ray Tube (CRT) Monitor

  • Screen coated with tiny dots of phosphor material (red, blue and green phosphor).
  • Sizes: 15, 17, 19, 21, 22 inches

Flat-panel Displays

  • Uses liquid crystal display (LCD monitor).
  • Less desk space than CRT monitor.
  • Consume less than one-third the power.

Mobile devices that have LCD screens:

  • notebooks
  • PDAs
  • tablet PCs
  • smart phones

Terminals

  • Input (and output) device that connects to a mainframe/other types computers (host computer/server).

Dumb Terminal

Intelligent Terminal

Terminals

Interactive Whiterboard

  • Similar to whiteboard (school and businesses)
  • Transmits any information written to a computer/multiple computers.
  • The first model were designed and manufactured for use in the office,