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Chapter 6 Output

Chapter 6 Output

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Chapter 6 Output

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  1. Chapter 6Output

  2. 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

  3. WHAT IS OUTPUT? • Data processed into a useful form, called information • Text • Graphics • Audio • Video

  4. WHAT ARE OUTPUT DEVICES? • Any computer component capable of conveying information to a user • Hardcopy devices • Permanent availability • Softcopy devices • Available temporarily

  5. DISPLAY DEVICES • Visually conveys text, graphics, and video information • Soft copy

  6. DISPLAY DEVICES • CRT (Cathode Ray Tube) Monitors • Screen housed in a plastic or metal case • Color vs Monochrome • Pixels (PICture ELement) • Viewable size

  7. 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

  8. 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

  9. DISPLAY DEVICES • Flat Panel Monitor • Also called LCD monitor • Takes up less space than CRT • Uses less than 1/3 the power of CRT.

  10. DISPLAY DEVICES • LCD’s on Mobile Devices • Notebooks • Tablet PC’s • PDA’s • Smart phones • Electronic Books (E-Books)

  11. 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

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

  13. 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

  14. PRINTERS • Impact Printers • Printing mechanism strikes paper, ribbon and character together • Most are not letter quality • Used for multipart forms

  15. PRINTERS • Impact Printers • Dot matrix printers • Small dots form characters • Continuous form paper • More pins on print head means higher quality

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

  17. PRINTERS • Nonimpact Printers • Ink-jet printers • Spray tiny drops of ink onto the paper • Resolution measured in dots per inch (dpi)

  18. 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

  19. 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

  20. PRINTERS • Nonimpact Printers • Special-purpose printers • Photo printer • Label printer • Portable printers

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

  22. 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

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

  24. OTHER OUTPUT DEVICES • Data projectors • Fax machines • Multifunction devices (MFDs)

  25. OUPUT DEVICES FOR THE PHYSICALLY CHALLENGED • Accessibility accessories • Magnifier • Control Panel/Accessibility Options • Braille printer

  26. Chapter 6 Complete