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What is Output?

Next. What is Output?. Data that has been processed into a useful form. What is output ?. Output device is any hardware component that can convey information to one or more people. p. 300 - 301 Fig. 6-1. Next. Display Devices.

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What is Output?

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  1. Next What is Output? • Data that has been processed into a useful form • What isoutput? • Output device is any hardware component that can convey information to one or more people p. 300 - 301 Fig. 6-1

  2. Next Display Devices • Output device that visually conveys text, graphics, and video information • Information on display device sometimes called soft copy • Monitorhouses display device that is packaged as separate peripheral • What is adisplay device? p. 302

  3. Next Display Devices • Uses liquid crystal display • Have a small footprint • Mobile devices that contain LCD displays include • Notebook computer, Tablet PC, ultra personal computer, portable media player, smart phone, and PDA • What is an LCD monitor? p. 302 - 303 Fig. 6-2

  4. Next Flat-Panel Displays • Some users position two or more monitors side-by-side or stacked • What about using multiple LCD monitors? • Allows users to run multiple applications simultaneously p. 303 Fig. 6-3

  5. Next Flat-Panel Displays • What are some mobile devices that have LCD screens?

  6. Next Flat-Panel Displays LCD Technology active-matrix (TFT, thin-flim transistor): uses a separate transistor to apply charges to each liquid crystal cell and thus displays high-quality color that is viewable from all angles. <Organic LED> passive-matrix uses fewer transistors, requires less power, and is less expensive.

  7. Next Flat-Panel Displays • Number of horizontal and vertical pixels in a display device • What isresolution? • Sharpness and clarity of image • Higher resolution makes image sharper, displays more text on screen, makes some elements smaller

  8. LCD quality: • Response time • time in ms that it takes to turn a pixel on or off • Brightness • measure in nit, which is a unit of visible ligth intensity equal to one candela per square meter. • candela is the standard unit of luminous intensity. • Dot pitch (pixel pitch) • distance in millimeters between pixels on a display device. • Contrast ratio • describes the difference in light intensity between the brightest white and darkest black

  9. Graphics processing unit (GPU) controls the manipulation and display of graphics on a display device.

  10. Next Flat-Panel Displays • Plug monitor intoDigital Video Interface (DVI)porton computer • How do you use an LCD monitor with a video card? standard monitorport S-video port DVI port

  11. Next Flat-Panel Displays • Displays image by applying voltage to layer of gas • Larger screen size and richer colors than LCD, but are more expensive • What is aplasma monitor?

  12. Next Flat-Panel Displays • What isdigital television (DTV) andhigh-definition television (HDTV)? High resolution All broadcast stationstransmit digital signals Many programs can bebroadcast on a singledigital channel Uses digital signals to producecrisper, higher-quality outputon LCD and plasma televisions HDTV (high-definition television)is the most advanced formof digital TV Great for game playing, watching movies, and browsing the Internet

  13. Next CRT Monitors • Containscathode-ray tube (CRT) • What is aCRT monitor? • Screen coated with tiny dots of phosphor material • Each dot consists of a red, blue, and green phosphor • Common sizes are 15, 17, 19, 21, and 22 inches • Viewable size is diagonal measurement of actual viewing area

  14. Next CRT Monitors • Encourages manufacturers to create energy-efficient devices that require little power when not in use • What is theENERGY STAR program? • Monitors and devices meeting guidelines display ENERGY STAR label

  15. Next CRT Monitors • Screen resolution • What determines the quality of a CRT monitor? • Text created with a smaller dot pitch is easierto read • Refresh rate is speed at which monitor redrawsimages on screen p. 309

  16. portrait landscape Next Printers • Output device that produces text and graphics on a physical medium • Result ishard copy, orprintout • Two orientations:portraitandlandscape • What is aprinter? p. 310 Fig. 6-11

  17. Next Printers • Depends on printing needs • How do you know which printer to buy? Budget Speed Color orblack and white Cost per page Multiple copies Graphics and photo printing Paper typesand sizes Systemcompatibility Future needs Wirelesscapability p. 310

  18. Next Printers • What are the various ways to print documents and pictures? p. 311 Fig. 6-13

  19. Next Printers • Forms characters and graphics without striking paper • What is anonimpact printer? • Ink-jet printersprays tiny drops of liquid ink onto paper • Prints in black-and-white or color on a variety of paper types • Speed: ppm pages per minute p. 312 Fig. 6-14

  20. Next Printers • Sharpness and clarity • What is theresolutionof a printer? • Measured by number ofdots per inch (dpi)printercan output p. 313 Fig. 6-15

  21. print head print cartridge firing chamber ink dot bubble resistor ink nozzle Next Printers • How does an ink-jet printer work? Step 1.A small resistor heats the ink, causing the ink to boil and form a vapor bubble. Step 2.The vapor bubble forces the ink through the nozzle. Step 3.Ink drops onto the paper. Step 4.As the vapor bubble collapses, fresh ink is drawn into the firing chamber. p. 313 Fig. 6-16

  22. Next Printers • Color printer that produces photo-lab-quality pictures • Many photo printers use ink-jet technology • Many photo printers have a built-in card slot • PictBridge is a standard technology that allows you to print pictures directly from a digital camera • What is aphoto printer? p. 314 - 315 Fig. 6-17

  23. Next Printers • High-speed, high-quality nonimpact printer • What is alaser printer? • Prints text and graphics in high-quality resolution, ranging from 1,200 to 2,400 dpi • Typically costs more than ink-jet printer, but is much faster p. 315 Fig. 6-18

  24. Next Printers • How does a laser printer work? p. 316 Fig. 6-19

  25. Next Printers • Generates images by pushing electrically heated pins against heat-sensitive paper • Dye-sublimation printer (also called a digital photo printer) uses heat to transfer dye to specially coated paper • Thermal wax-transfer printer generates rich, nonsmearing images by using heat to melt colored wax onto heat-sensitive paper • What is athermal printer? p. 317 Fig. 6-20

  26. Next Printers • Small, lightweight, battery-powered printer that allows mobile user to print from notebook computer, Tablet PC, PDA, or smart phone while traveling • What is amobile printer? p. 317 Fig. 6-21

  27. Next Printers • Small printer that prints on adhesive-type material • What are label printers and postage printers? • Most also print bar codes • Postage printer has built-in digital scale and printspostage stamps p. 318 Fig. 6-22

  28. Next Printers • Sophisticated printer used to produce high-quality drawings • Large-format printercreates photo-realistic-qualitycolor prints • What is aplotter? p. 318 Fig. 6-23

  29. Next Printers • Impact printer that produces printed images when tiny wire pins strike ribbon • Impact printer forms characters by striking mechanism against inked ribbon that contacts paper • What is adot-matrix printer? p. 318 - 319 Fig. 6-24

  30. Next Printers • High-speed impact printer that prints entire lineat a time • Speed measured in lines per minute (lpm) • Band printer prints fullyformed characters using a hammer mechanism • Shuttle-matrix printer is high-speed printer that works like dot-matrix printer • What is aline printer? p. 319 Fig. 6-25

  31. Next Speakers, Headphones, and Headsets • Computer component that produces music, speech, or other sounds • What is anaudio output device? • Speakers and headsets are common devices p. 320 - 321 Figs. 6-26 – 6-27

  32. Next Speakers, Headphones, and Headsets • Computer talks to you through speakers on computer • Internet telephonyallows you to have conversationover Web • What isvoice output? p. 321 - 322 Fig. 6-28

  33. Next Other Output Devices • Device that transmits and receives documents over telephone lines • What is afacsimile (fax) machine? p. 322 Fig. 6-29

  34. internal fax card in system unit external fax modem fax machine Next Other Output Devices • Modem that allows you to send and receive electronic documents as faxes • What is afax modem? p. 322 Fig. 6-30

  35. Next Other Output Devices • Provides functionality of printer, scanner, copy machine, and fax machine • What is amultifunction peripheral? p. 323 Fig. 6-31

  36. Next Other Output Devices • Device that takes text and images from computer screen and projects them onto larger screen • Digital light processing (DLP) projector • What is adata projector? p. 323 Fig. 6-32

  37. Other Output Devices • What is interactive whiteboard? • a touch-sensitive device, resembling a dry-erase board , that displays the image on a connected computer screen. • Three basic technologies: • 1. front projection • 2. rear projection • 3. an interactive whiteboard fits over an LCD screen or a plasma display.

  38. Next Other Output Devices • Sends resistance to device in response to actions of user • What isforce feedback? p. 324 Fig. 6-33

  39. User Next Putting It All Together • What are suggested output devices for the home user? Monitor Printer Other • 17- or 19-inch LCD monitor • Ink-jet color printer; or • Photo printer • Speakers • Headset • Force-feedback joystick, wheel, and/or gamepad p. 325 Fig. 6-34

  40. User Next Putting It All Together • What are suggested output devices for the small office/home office user? Monitor Printer Other • 19- or 21-inch LCD monitor • Color LCD screen on Tablet PC, PDA, or smart phone • Multifunction peripheral; or • Ink-jet color printer; or • Laser printer (black-and-white or color) • Label printer • Postage printer • Fax machine • Speakers p. 325 Fig. 6-34

  41. User Next Putting It All Together • What are suggested output devices for the mobile user? Monitor Printer Other • 17-inch color LCD screen on notebook computer • LCD screen on Tablet PC, PDA, or smart phone • Mobile color printer • Ink-jet color printer; or • Laser printer for in-office use (black-and-white or color) • Photo printer • Fax modem • Headphones or earphones • DLP data projector p. 325 Fig. 6-34

  42. User Next Putting It All Together • What are suggested output devices for the power user? Monitor Printer Other • 23-inch LCD monitor • Laser printer (black-and-white or color) • Plotter or large-format printer; or • Photo printer; or • Dye-sublimation printer • Fax machine or fax modem • Speakers • Headphones or earphones p. 325 Fig. 6-34

  43. User Next Putting It All Together • What are suggested output devices for the large business user? Monitor Printer Other • 19- or 21-inch LCD monitor • LCD screen on Tablet PC, PDA, or smart phone • High-speed laser printer • Laser printer, color • Line printer (for large reports from a mainframe) • Label printer • Fax machine or fax modem • Speakers • Headphones or earphones • DLP data projector p. 325 Fig. 6-34

  44. Next Output Devices for Physically Challenged Users • Windows Magnifier enlarges text and other items on screen • What is theMagnifier? p. 326 Fig. 6-35

  45. Next Output Devices for Physically Challenged Users • What other output options are available for visually impaired users? • Change Window settings, such as increasing size or changing color of text to make words easier to read • Blind users can work with Windows Vista’s Narrator • Braille printeroutputs information in Braille onto paper p. 326 Fig. 6-36

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