OUTPUT DEVICES

1. OUTPUT DEVICES
&
FUNCTIONS
PRESENTED BY
EBIN JOSE PULLATTU

2. Computeroutputdevicesareusedto
provideinformationforauserin
differentforms.Theformatsinclude
visual,audioanddigital.ACPUis
responsibleforprocessingthe
instructionsandthedevicesare
responsibleinoutputtingtheprocessed
informationindifferentformats
dependingonthetypeofoutputdevice
wehave.Intheworldof
computers,input/output(I/O)refersto
thecommunicationbetweenacomputer
andtheuser.

3. Inputisthedatasenttothe
system,whereasoutputisthedatasent
bythesystemtotheoutsideworld.
Computeroutputdevicesarecomputer
hardwareequipment,thatareusedto
communicatetheresultsofdata
processingcarriedoutbyacomputerto
theuser.Thereareanumberof
devices,whichproducedataindifferent
forms,whichincludesaudio,videoor
hardcopy.Lightispassedthroughliquid
crystalstocreatethepixels.

4. Outputdeviceofcomputeraretypesof
peripheralhardwareconnected,thatis
connectedtothecomputer,eitherusing
cablesoroverawirelessnetwork.

5. Output devices includes ;
Monitor
Speaker
Printer
Projector
Plotter
Disk

6. Monitor
Themostcommoncomputeroutput
deviceisthemonitororcomputer
screen.Monitorscreateavisualdisplay
fromprocesseddatathatuserscan
view.Theycomeinavarietyofscreen
sizesandvisualresolutionsThereare
twotypesofcomputermonitors,CRT
andflatpanel.CRTmonitorsuse
phosphorescentdotstocreatethepixels
thatmakeupdisplayimages.Flatpanel
monitorsusuallyuseLCDorplasmato
createoutput.

7. All monitors rely on a video card that is
located on the computer motherboard or
in a special expansion slot. The video card
processes the computer data into image
details that the monitors can display. A
monitor is also called as video display
terminal (VDT). The visual display of the
processed data, which the users can view
is got through the monitor. Computer
monitorscome in a variety of screen sizes
and not to forget visual resolutions.

8. Allmonitorsrelyinavideocard,which
islocatedonthemotherboardtodisplay
theinformation.Itisthevideo
card,whichprocessesthedatainto
images,whichiseventuallydisplayedon
themonitor.

9. Speaker
Computerspeakeristheotheroutput
devicewhichisusedtohearasound
playedbyacomputer.Speakerscanbe
builtinwiththemotherboardorcomes
asaseparatepart.Itconnectswiththe
computerspeakerwithacable.Unlike
theoldspeaker’stypes,modern
speakerscomewithUSBconnection
whichdoesbothfunctions–connection
andpowersupply.

10. Thebuiltinspeakerscanbeheard
throughaheadphone,ifyoudon’twant
tobuytheindependentspeakerset.
Headphoneisalsoanoutputdevice
usedtohearmusicfromdigitalportable
players,suchasMP3players,IPods
andstufflikethat.Itisdesignedtofit
intoanear.Itisalsousedmostlytoplay
computergamesandchatonline.

11. Audiodataiscreatedbythecomputer
andthensenttotheaudiocard,whichis
locatedinanexpansionslot.Thecard
translatesthedataintoaudio
signals,whicharesenttotheaudio
outputdevice.

12. Printer
Printerenablesustogetcomputer
outputonpaper.Itisoneofthemost
popularcomputeroutputdeviceswe
oftenusetogetinformationonpaper-
calledhardcopy.Generally,thereare
twotypesofprinters:laserandink
jet/deskjet.Widevarietiesofprinters
areavailableunderthesegroupswhich
incorporatedifferentcapabilities,
featuresandprice.

13. Usually,laserprintersaremonochrome
(blackandwhite),butcolourlaser
printersarealsoavailable.Itisfaster
thantheinkjetprintersandvery
expensive,particularlyifithasboth
monochromeandcolourprinting
features.Whenyouwanttobuya
printer,yourchoicemuststartfrom
lasertypes.

14. Though laser printer is expensive at first
purchase, but in the long run it handles
large volumes of printing with low
operating cost. On the other hand, ink jet
printer requires minimal initial
investment but has high operating cost.
Ink jet printer is a requirement if you are
into graphics and desktop publishing
business. HP, the leader in printer
industry, recently announced a new
printer which outranks the existing ones.

15. ThenewHPLaserJetprinter1100
worksbyPlugandPlay,itdoesn't
needdriverCD.Italsosaves72%of
electricconsumptionbyautomatically
turningitselfonandoff.
Laser Jet Printer

16. Ink Jet Printer

17. Projector
It is a hardware device, with which an
image like a computer screen is
projected onto a flat screen. Image data
is sent to the video card, by the
computer which is then translated into a
video image and sent to the projector. A
projector is often used in meetings or to
make presentations, because they allow
for a large image to be shown, with
which the display is available for a large
audience.

18. Projector

19. Plotter
Plotters,likeprinters,createahardcopy
renditionofadigitallyrendereddesign.
Thedesignissenttoaplotterthrougha
graphicscardandtheimageiscreated
usingapen.Insimplewords,plotters
basicallydrawanimageusingaseriesof
straightlines.Thiscomputeroutput
deviceisusedwithengineering
applications.

20. Plotter

21. Disc
CD, DVD and floppy disc are output
devices that can also be used as storage
and input devices. The computer sends
data to the disc, where it is embedded
and can be later retrieved.
Compact disc, or CD, is an optical
device that stores audio and visual
data in a digital format. Data is placed
on the disc, using a laser writer that
embeds the data into the disc's coating.

22. Digital Versatile Disc, or DVD, is an
optical device that stores visual data in a
media format. DVDs feature a dual
coating system that allows audio and
visual data to be written at the same
time by using a laser.
Floppy disc is a magnetic storage device.
A layer of magnetized material is placed
within a proactive plastic casing. The
computer embeds the data into the
magnetized material, using a writing
head.

23. D V D
C D
Floppy Disc