Chapter 6 Output

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Chapter 6Output
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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
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WHAT IS OUTPUT?

• Data processed into a useful form, called
  information
• Text
• Graphics
• Audio
• Video

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WHAT ARE OUTPUT DEVICES?

• Any computer component capable of conveying
  information to a user
• Hardcopy devices
• Permanent availability
• Softcopy devices
• Available temporarily

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DISPLAY DEVICES

• Visually conveys text, graphics, and video
  information
• Soft copy

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DISPLAY DEVICES

• CRT (Cathode Ray Tube) Monitors

• Screen housed in a plastic or metal case
• Color vs Monochrome
• Pixels (PICture ELement)
• Viewable size

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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

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DISPLAY DEVICES

• Monitor Ergonomics

• Controls for brightness, contrast
• Adjustable bases
• All CRTs produce a small amount of
  electromagnetic radiation (EMR)
• Greatest at sides and back
• LCDs dont have this risk
• ENERGY STAR program

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DISPLAY DEVICES

• Flat Panel Monitor

• Also called LCD monitor
• Takes up less space than CRT
• Uses less than 1/3 the power of CRT.

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DISPLAY DEVICES

• LCDs on Mobile Devices

• Notebooks
• Tablet PCs
• PDAs
• Smart phones
• Electronic Books (E-Books)

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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

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DISPLAY DEVICES

• Gas Plasma Monitors
• Another flat-panel display
• Larger screen sizes and higher quality than LCD
• Much more expensive than LCD

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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

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PRINTERS

• Impact Printers

• Printing mechanism strikes paper, ribbon and
  character together
• Most are not letter quality
• Used for multipart forms

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PRINTERS

• Impact Printers
• Dot matrix printers

• Small dots form characters
• Continuous form paper
• More pins on print head means higher quality

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PRINTERS

• Impact Printers
• Line printers
• High speed
• Prints an entire line at a time
• Noisy, usually low quality
• Band printer
• Shuttle-matrix printer

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PRINTERS

• Nonimpact Printers
• Ink-jet printers

• Spray tiny drops of ink onto the paper
• Resolution measured in dots per inch (dpi)

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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

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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

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PRINTERS

• Nonimpact Printers
• Special-purpose printers
• Photo printer
• Label printer
• Portable printers

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PRINTERS

• Nonimpact Printers
• Plotters
• Pen plotters
• Electrostatic plotters
• Large format printers
• Photo-realistic quality color prints

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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

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AUDIO OUTPUT

• Audio output devices
• Common devices speakers and headphones
• Produce music, speech, or other sounds
• Voice output
• Digitized vs. synthesized speech
• Internet Telephony

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OTHER OUTPUT DEVICES

• Data projectors
• Fax machines
• Multifunction devices (MFDs)

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OUPUT DEVICES FOR THE PHYSICALLY CHALLENGED

• Accessibility accessories
• Magnifier
• Control Panel/Accessibility Options
• Braille printer

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Chapter 6 Complete