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

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what is output
What is Output?

Next

  • What isoutput?
  • Data that has been processed into a useful form,
  • Output device is any hardware component that can convey information to user

p. 300 - 301 Fig. 6-1

display devices
Display Devices

Next

  • What is adisplay device?
  • Output device that visually conveys information
    • Information on display device sometimes called soft copy
  • Monitorhouses display device as separate peripheral

p. 302

display devices4
Display Devices

Next

  • What is an LCD monitor?
  • Uses liquid crystal display
  • Have a small footprint
  • Mobile devices that contain LCD displays include
    • Notebook computer, Tablet PC, PDA, and Smart Phone

p. 302 - 303 Fig. 6-2

flat panel displays
Flat-Panel Displays

Next

  • What about using multiple LCD monitors?
  • Some users position two or more monitors side by side or stacked
  • Allows users to run multiple applications simultaneously

p. 303 Fig. 6-3

flat panel displays6
Flat-Panel Displays

Tablet PC

PDA

notebookcomputer

smart phone

Next

  • What are some mobile devices that have LCD screens?

p. 303 Fig. 6-4

flat panel displays7
Flat-Panel Displays

Transparent electrodes

Alignment layer

Color filter

Polarizing glass filter

Fluorescent tube panel

Next

  • How does LCD work?
  • Uses liquid compound to present information on a display

Step 2.As light passes through liquid crystal, electrical charge causes some of the cells to twist, making light waves bend as they pass through color filter.

Step 1.Panel of fluorescent tubes emits light waves through polarizing glass filter, which guides light toward layer of liquid crystal cells.

Step 3.When light reaches second polarizing glass filter, light is allowed to pass through any cells that line up at the first polarizing glass filter. Absence and presence of colored light cause image to display on the screen.

Liquid crystal cells

p. 304

flat panel displays8
Flat-Panel Displays

Next

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

p. 304 - 305 Fig. 6-5

flat panel displays9
Flat-Panel Displays

Next

  • How do you use an LCD monitor with a video card?
  • Plug monitor intoDigital Video Interface (DVI)porton computer

standard monitorport

S-video port

DVI port

p. 305 Fig. 6-6

flat panel displays10
Flat-Panel Displays

Next

  • What is aplasma monitor?
  • Displays image by applying voltage to layer of gas
    • Larger screen size and higher display quality than LCD, but are more expensive

p. 306 Fig. 6-7

flat panel displays11
Flat-Panel Displays

Next

  • 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

p. 306

crt monitors
CRT Monitors

Next

  • What is aCRT monitor?
  • Containscathode-ray tube (CRT)
  • 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

p. 307 Fig. 6-9

crt monitors13
CRT Monitors

Next

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

p. 307

crt monitors14
CRT Monitors

Next

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

p. 308

crt monitors15
CRT Monitors

Next

  • How does video travel from the processor to a CRT monitor?
  • Video card(also called agraphics card)converts digital output from computer into analog video signal

Step 5.Electron guns fire the three color signals to the front of the CRT.

Step 1.The processor sends digital video data to the video card.

Step 3.The analog signal is sent through a cable to the CRT monitor.

Step 4.The CRT monitor separates the analog signal into red, green, and blue signals.

Step 6.An image is displayed on the screen when the electrons hit phosphor dots on the back of the screen.

Step 2.The video card’s digital-to-analog converter (DAC) converts the digital video data to an analog signal.

p. 309 Fig. 6-10

printers
Printers

portrait

landscape

Next

  • What is aprinter?
  • Output device that produces text and graphics on a physical medium
  • Result ishard copy, orprintout
  • Two orientations:portraitandlandscape

p. 310 Fig. 6-11

printers17
Printers

Next

  • How do you know which printer to buy?
  • Depends on printing needs

Budget

Speed

Color orblack and white

Cost per page

Multiple copies

Graphics and photo printing

Paper typesand sizes

Systemcompatibility

Future needs

Wirelesscapability

p. 310

printers18
Printers

wirelessprinters

printercable

cable

dockingstation

mediacard

Next

  • What are the various ways to print documents and pictures?

various ways to print

p. 311 Fig. 6-13

printers19
Printers

Next

  • What is anonimpact printer?
  • Forms characters and graphics without striking paper
  • Ink-jet printersprays tiny drops of liquid ink onto paper
    • Prints in black-and-white or color on a variety of paper types

p. 312 Fig. 6-14

printers20
Printers

300 dpi

600 dpi

1200 dpi

Next

  • What is theresolutionof a printer?
  • Sharpness and clarity
  • Measured by number ofdots per inch (dpi)printercan output

p. 313 Fig. 6-15

printers21
Printers

print head

print cartridge

firing chamber

ink dot

bubble

resistor

ink

nozzle

Next

  • 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

printers22
Printers

Next

  • What is aphoto printer?
  • Color printer that produces photo-lab-quality pictures
  • Many photo printers have a built-in card slot

p. 314 - 315 Fig. 6-17

printers23
Printers

Next

  • What is alaser printer?
  • High-speed, high-quality nonimpact printer
  • Prints text and graphics in very 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

printers24
Printers

Next

  • How does a laser printer work?

p. 316 Fig. 6-19

printers25
Printers

Next

  • What is athermal printer?
  • 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

p. 317 Fig. 6-20

printers26
Printers

Next

  • What is amobile printer?
  • Small, lightweight, battery-powered printer that allows mobile user to print from notebook computer, Tablet PC, or PDA while traveling

p. 317 Fig. 6-21

printers27
Printers

Next

  • What are label printers and postage printers?
  • Small printer that prints on adhesive-type material
  • Most also print bar codes
  • Postage printer has built-in digital scale and printspostage stamps

p. 318 Fig. 6-22

printers28
Printers

Next

  • What is aplotter?
  • Sophisticated printer used to produce high-quality drawings
  • Large-format printercreates photo-realistic-qualitycolor prints

p. 318 Fig. 6-23

printers29
Printers

Next

  • What is adot-matrix printer?
  • 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

p. 319 Fig. 6-24

printers30
Printers

Next

  • What is aline printer?
  • 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

p. 319 Fig. 6-25

speakers and headsets
Speakers and Headsets

Next

  • What is anaudio output device?
  • Computer component that produces music, speech, or other sounds
  • Speakers and headsets are common devices

p. 320 - 321 Figs. 6-26 – 6-27

speakers and headsets32
Speakers and Headsets

Next

  • What isvoice output?
  • Computer talks to you through speakers on computer
  • Internet telephonyallows you to have conversationover Web

p. 321 Fig. 6-28

other output devices
Other Output Devices

Next

  • What is afacsimile (fax) machine?
  • Device that transmits and receives documents over telephone lines

p. 322 Fig. 6-29

other output devices34
Other Output Devices

internal fax card in system unit

external fax modem

fax machine

Next

  • What is afax modem?
  • Modem that allows you to send and receive electronic documents as faxes

p. 322 Fig. 6-30

other output devices35
Other Output Devices

Next

  • What is amultifunction peripheral?
  • Provides functionality of printer, scanner, copy machine, and fax machine

p. 323 Fig. 6-31

other output devices36
Other Output Devices

Next

  • What is adata projector?
  • Device that takes image from computer screen and projects it onto larger screen

p. 323 Fig. 6-32

other output devices37
Other Output Devices

Next

  • What isforce feedback?
  • Sends resistance to joystick or wheel in response to actions of user

p. 324 Fig. 6-33

output devices for physically challenged users
Output Devices for Physically Challenged Users

Next

  • What is theMagnifier command?
  • Windows Magnifier command enlarges text and other itemson screen

p. 326 Fig. 6-35

output devices for physically challenged users39
Output Devices for Physically Challenged Users

Next

  • 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 voice output
  • Braille printeroutputs information in Braille onto paper

p. 326 Fig. 6-36

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