Output devices..


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chapter no 6 of discovering computers by shelly cashman.

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Output devices..

  1. 1. Output Devices<br />
  2. 2. Chapter 6 Objectives<br />
  3. 3. What is Output?<br />What isoutput?<br /><ul><li>Data that has been processed into a useful form
  4. 4. Output device is any hardware component that can convey information to one or more people</li></li></ul><li>Display Devices<br />What is adisplay device?<br /><ul><li>Output device that visually conveys text, graphics, and video information
  5. 5. Information on display device sometimes called soft copy
  6. 6. Monitorhouses display device that is packaged as separate peripheral</li></li></ul><li>Display Devices<br />What is an LCD monitor?<br /><ul><li>Uses liquid crystal display
  7. 7. Has a small footprint
  8. 8. Mobile devices that contain LCD displays include
  9. 9. Notebook computer, Tablet PC, ultra personal computer, portable media player, smart phone, and PDA</li></li></ul><li>Display Devices<br />What are some mobile devices that have LCD screens?<br />
  10. 10. Display Devices<br />What isresolution?<br /><ul><li>Number of horizontal and vertical pixels in a display device
  11. 11. Sharpness and clarity of image
  12. 12. Higher resolution makes image sharper, displays more text on screen, makes some elements smaller</li></li></ul><li>Display Devices<br />What is aplasma monitor?<br /><ul><li>Displays image by applying voltage to layer of gas
  13. 13. Larger screen size and richer colors than LCD, but are more expensive</li></li></ul><li>Display Devices<br />What isdigital television (DTV) andhigh-definition television (HDTV)?<br />Many programs can bebroadcast on a singledigital channel<br />All broadcast stationstransmit digital signals<br />High resolution<br />HDTV (high-definition television)is the most advanced formof digital TV<br />Uses digital signals to producecrisper, higher-quality outputon LCD and plasma televisions<br />Great for game playing, watching movies, and browsing the Internet<br />
  14. 14. Display Devices<br />What is aCRT monitor?<br /><ul><li>Containscathode-ray tube (CRT)
  15. 15. Screen coated with tiny dots of phosphor material
  16. 16. Each dot consists of a red, blue, and green phosphor
  17. 17. Common sizes are 15, 17, 19, 21, and 22 inches
  18. 18. Viewable size is diagonal measurement of actual viewing area</li></li></ul><li>Printers<br />What is aprinter?<br /><ul><li>Output device that produces text and graphics on a physical medium
  19. 19. Result ishard copy, orprintout
  20. 20. Two orientations:portraitandlandscape</li></ul>portrait<br />landscape<br />
  21. 21. Printers<br />How do you know which printer to buy?<br /><ul><li>Depends on printing needs</li></ul>Speed<br />Budget<br />Color orblack and white<br />Cost per page<br />Paper typesand sizes<br />Graphics and photo printing<br />Multiple copies<br />Systemcompatibility<br />Wirelesscapability<br />Future needs<br />
  22. 22. Printers<br />What are the various ways to print documents and pictures?<br />
  23. 23. Printers<br />What is anonimpact printer?<br /><ul><li>Forms characters and graphics without striking paper
  24. 24. Ink-jet printersprays tiny drops of liquid ink onto paper
  25. 25. Prints in black-and-white or color on a variety of paper types</li></li></ul><li>Printers<br />What is theresolutionof a printer?<br /><ul><li>Sharpness and clarity
  26. 26. Measured by number ofdots per inch (dpi)printercan output</li></li></ul><li>print head<br />print cartridge<br />firing chamber<br />ink dot<br />bubble<br />resistor<br />ink<br />nozzle<br />Printers<br />How does an ink-jet printer work?<br />Step 1.A small resistor heats the ink, causing the ink to boil and form a vapor bubble.<br />Step 2.The vapor bubble forces the ink through the nozzle.<br />Step 3.Ink drops onto the paper.<br />Step 4.As the vapor bubble collapses, fresh ink is drawn into the firing chamber.<br />
  27. 27. Printers<br />What is aphoto printer?<br /><ul><li>Color printer that produces photo-lab-quality pictures
  28. 28. Many photo printers have a built-in card slot
  29. 29. Pitch Bridge is a standard technology that allows you to print pictures directly from a digital camera</li></li></ul><li>Printers<br />What is alaser printer?<br /><ul><li>High-speed, high-quality nonimpact printer
  30. 30. Prints text and graphics in high-quality resolution, ranging from 1,200 to 2,400 dpi
  31. 31. Typically costs more than ink-jet printer, but is much faster</li></li></ul><li>Printers<br />How does a laser printer work?<br />
  32. 32. Printers<br />What is athermal printer?<br /><ul><li>Generates images by pushing electrically heated pins against heat-sensitive paper
  33. 33. Dye-sublimation printer (also called a digital photo printer) uses heat to transfer dye to specially coated paper</li></li></ul><li>Printers<br />What is amobile printer?<br /><ul><li>Small, lightweight, battery-powered printer that allows mobile user to print from notebook computer, Tablet PC, PDA, or smart phone while traveling</li></li></ul><li>Printers<br />What are label printers and postage printers?<br /><ul><li>Small printer that prints on adhesive-type material
  34. 34. Most also print bar codes
  35. 35. Postage printer has built-in digital scale and printspostage stamps</li></li></ul><li>Printers<br />What is aplotter?<br /><ul><li>Sophisticated printer used to produce high-quality drawings
  36. 36. Large-format printercreates photo-realistic-qualitycolor prints</li></li></ul><li>Printers<br />What is adot-matrix printer?<br /><ul><li>Impact printer that produces printed images when tiny wire pins strike ribbon
  37. 37. Impact printer forms characters by striking mechanism against inked ribbon that contacts paper</li></li></ul><li>Printers<br />What is aline printer?<br /><ul><li>High-speed impact printer that prints entire lineat a time
  38. 38. Speed measured in lines per minute (lpm)
  39. 39. Band printer prints fullyformed characters using a hammer mechanism
  40. 40. Shuttle-matrix printer is high-speed printer that works like dot-matrix printer</li></li></ul><li>Speakers, Headphones, and Earphones<br />What is anaudio output device?<br /><ul><li>Computer component that produces music, speech, or other sounds
  41. 41. Speakers and headsets are common devices</li></li></ul><li>Other Output Devices<br />What is afacsimile (fax) machine?<br /><ul><li>Device that transmits and receives documents over telephone lines
  42. 42. Converts an original document into a digitized image
  43. 43. Many computers include fax capability</li></li></ul><li>Other Output Devices<br />What is amultifunction peripheral?<br /><ul><li>Provides functionality of printer, scanner, copy machine, and fax machine</li></li></ul><li>Other Output Devices<br />What is adata projector?<br /><ul><li>Device that takes text and images from computer screen and projects them onto larger screen
  44. 44. DLP projector
  45. 45. LCD projector</li></li></ul><li>Other Output Devices<br />What is aninteractive whiteboard?<br /><ul><li>Touch-sensitive device that displays the image on a connected computer screen
  46. 46. SMART board</li></li></ul><li>Summary of Output<br />Display devices<br />Multifunction peripherals<br />Printers<br />Data projectors<br />Speakers, headphones, and earphones<br />Interactive whiteboards<br />Fax machines and fax modems<br />Force feedback joysticks, wheels, and gamepads<br /> Chapter 6 Complete<br />