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Chapter 6 Output Chapter 6 Objectives Describe the four categories of output Summarize the characteristics of ink-jet printers, photo printers, laser printers, thermal printers, portable printers, label and postage printers, and plotter and large-format printers

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chapter 6 objectives
Chapter 6 Objectives

Describe the four categories of output

Summarize the characteristics of ink-jet printers, photo printers, laser printers, thermal printers, portable printers, label and postage printers,and plotter and large-format printers

Describe characteristics of a CRT monitor and factors that affect its quality

Describe the methods used for wireless printing

Explain the relationship between a video cardand CRT monitor

Describe the uses of speakers and headsets

Summarize the characteristics of flat panel monitors, LCD screens, gas plasma displays,and HDTV displays

Identify the output characteristics of fax machines and fax modems, multifunction peripherals, data projectors, joysticks, and wheels

Differentiate between an impact printerand a nonimpact printer

Identify output options for physicallychallenged users

what is output
WHAT IS OUTPUT?
  • Data processed into a useful form, called information
    • Text
    • Graphics
    • Audio
    • Video
what are output devices
WHAT ARE OUTPUT DEVICES?
  • Any computer component capable of conveying information to a user
  • Hardcopy devices
    • Permanent availability
  • Softcopy devices
    • Available temporarily
display devices
DISPLAY DEVICES
  • Visually conveys text, graphics, and video information
  • Soft copy
display devices6
DISPLAY DEVICES
  • CRT (Cathode Ray Tube) Monitors
  • Screen housed in a plastic or metal case
  • Color vs Monochrome
  • Pixels (PICture ELement)
  • Viewable size
display devices7
DISPLAY DEVICES
  • CRT Quality
  • Resolution - sharpness and clarity
  • Depends on
    • Number of pixels (PICture ELements)
    • Dot pitch
  • Higher resolution means smaller images display
  • Refresh rate – speed at which monitor redraws images on screen
display devices8
DISPLAY DEVICES
  • Monitor Ergonomics
  • Controls for brightness, contrast
  • Adjustable bases
  • All CRT’s produce a small amount of electromagnetic radiation (EMR)
    • Greatest at sides and back
    • LCD’s don’t have this risk
  • ENERGY STAR program
display devices9
DISPLAY DEVICES
  • Flat Panel Monitor
  • Also called LCD monitor
  • Takes up less space than CRT
  • Uses less than 1/3 the power of CRT.
display devices10
DISPLAY DEVICES
  • LCD’s on Mobile Devices
  • Notebooks
  • Tablet PC’s
  • PDA’s
  • Smart phones
  • Electronic Books (E-Books)
display devices11
DISPLAY DEVICES
  • LCD Technologies
  • Active matrix (also called TFT - thin-film transistor)
    • High quality color
    • Viewable from all angles
  • Organic LED is new type of TFT
    • Even better quality
    • Less expensive, need less power
  • Passive matrix (also called dual-scan)
    • Uses less power
    • Lower quality display
display devices12
DISPLAY DEVICES
  • Gas Plasma Monitors
    • Another flat-panel display
    • Larger screen sizes and higher quality than LCD
    • Much more expensive than LCD
printers
PRINTERS
  • Produces text and graphics on a physical medium such as paper or transparency film
  • Hard copy (printout)
  • Impact vs. nonimpact
  • Portrait vs. landscape orientation
printers14
PRINTERS
  • Impact Printers
  • Printing mechanism strikes paper, ribbon and character together
  • Most are not letter quality
  • Used for multipart forms
printers15
PRINTERS
  • Impact Printers
    • Dot matrix printers
  • Small dots form characters
  • Continuous form paper
  • More pins on print head means higher quality
printers16
PRINTERS
  • Impact Printers
    • Line printers
      • High speed
      • Prints an entire line at a time
      • Noisy, usually low quality
      • Band printer
      • Shuttle-matrix printer
printers17
PRINTERS
  • Nonimpact Printers
    • Ink-jet printers
  • Spray tiny drops of ink onto the paper
  • Resolution measured in dots per inch (dpi)
printers18
PRINTERS
  • Nonimpact Printers
    • Laser printers
  • Faster, higher quality than ink-jet
  • Operates much like a copier
  • Stores entire page before printing it
  • Page description language (PDL)
    • PCL (Printer Control Language)
    • Postscript
printers19
PRINTERS
  • Nonimpact Printers
    • Basic Thermal printers
      • Uses heat to transfer image to specially treated paper
      • Low quality; image fades over time
    • Thermal wax-transfer printers
      • Melt colored wax onto heat-sensitive paper
      • High-quality color; expensive
    • Dye-sublimation printers
      • use heat to transfer colored dye to specially coated paper
printers20
PRINTERS
  • Nonimpact Printers
    • Special-purpose printers
      • Photo printer
      • Label printer
    • Portable printers
printers21
PRINTERS
  • Nonimpact Printers
    • Plotters
      • Pen plotters
      • Electrostatic plotters
    • Large format printers
      • Photo-realistic quality color prints
wireless printing
WIRELESS PRINTING
  • Uses one of these technologies:
    • Infrared (light waves)
      • must align IrDA ports on sending device and printer
    • Bluetooth (radio waves)
      • no need to align
      • can broadcast up to 60 feet
audio output
AUDIO OUTPUT
  • Audio output devices
    • Common devices: speakers and headphones
    • Produce music, speech, or other sounds
    • Voice output
      • Digitized vs. synthesized speech
      • Internet Telephony
other output devices
OTHER OUTPUT DEVICES
  • Data projectors
  • Fax machines
  • Multifunction devices (MFDs)
ouput devices for the physically challenged
OUPUT DEVICES FOR THE PHYSICALLY CHALLENGED
  • Accessibility accessories
    • Magnifier
    • Control Panel/Accessibility Options
  • Braille printer