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Input and output deices

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by

black ghandi

on 6 March 2014

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Transcript of Input and output deices

OUTPUT AND INPUT devices
WHAT IS OUTPUT?
THE OUTPUT DEVICES THAT ATTACHED TO THE COMPUTER SYSTEM THAT MAKE THE OUTPUT USABLE
what is input
DEFINITION

DISPLAY DEVICES
CONVEYS TEXTS, GRAPHICS AND VIDEOS INFORMATION
A MONITOR IS PACKAGED AS A SEPARATED PERIPHERAL
LCD MONITAR
WIDE SCREEN
DISPLAY DEVICES
LCD (ZOOM)
LIQUID CRYSTAL DISPLAY
USES A LIQUID COMPOUND
TO THE PRESENT INFORMATION ON A DISPLAY DEVICES
ACTIVE MATRIX DISPLAY
PASSIVE MATRIX DISPLAY
THE QUALITY OF A LCD OR MONITOR OR LCD SCREEN DEPENDS PRIMARILY ON
RESOLUTION
RESPONDS TIME
BRIGHTNESS
DOT PITCH
CONTRAST RATIO
PRINTERS
printers
PRODUCES TEXT AND GRAPHICS ON A PHYSICAL MEDIUM
A NONIMPACT PRINTERFORMS CHARACTERISTIC AND GRAFICS IN A PIECE OF PAPER WITHOUT ACTUALLY STRIKING THE PAPER
THERE ARE EIGHT TYPE OF PRINTER
INK-JET PRINTERS

:

SPRAYING TINY DROPS OF LIQUID INK ONTO A PIECE OF PAPER
PHOTO PRINTERS

:
PRODUCES COLOR PHOTO-LAB-QUALITY PICTURES
LASER PRINTERS
:

BENEFIT OF LASER PRINTER ARE BLACK AND WHITE, COLOR,HIGH-QUALITY AND SPEED-QUALITY
THERMAL PRINTERS
:
PUSHING ELECTRICALLY HEATED PINS AGAINST THE HEAT-SENSATIVE PAPER
direct thermal printer
thermal transfer printer
MOBILE PRINTER
:

ALLOWS A MOBILE USER TO PRINT FROM A NOTEBOOK, COMPUTER, SMARTPHONE, AND OTHER MOBILE DEVICES
LABEL PRINTER

:

ADHESIVE-TYPE MATERIAL AND PRINT POSTAGE STAMPS
PLOTTERS PRINTER

:
PRODUCE HIGH QUALITY DRAWING (LARGE SCALE)
IMPACT PRINTER

:

STRIKING A MECHANISM AGAINST AN INKED RIBBON THAT PHYSICALLY CONTACTS THE PAPER
SPEAKER, HEADPHONE,
EARBUDS
AUDIO OUTPUT DEVICES PRODUCES MUSIC, SPEECH AND OTHER SOUND
SPEAKER

:
USED TO OUTPUT SOUND FROM A COMPUTER

HEADPHONES

:

COVER OR AREPLACED OUTSIDE OF THE EAR
EARBUDS [EARPHONES]
:

REST INSIDE THE EAR CANNEL
OTHER OUTPUT DEVICES
data projector
:
DEVICES THAT TAKES THE TEXT
AND AN IMAGES DISPLAY ON A COMPUTER SCREEN AND PROJECTS THEM ON LARGER SCREEN, LCD PROJECTOR AND DLP PROJECTOR
INTERACTIVE WHITEBOARD
:
TOUCH-SENSITIVE DEVICE, RESEMBLING A DRY-ERASE BOARDTHAT DISPLAY THE IMAGES ON A CONNECTED COMPUTER SCREEN
FORCE-FEEDBACK GAME
CONTROLLER
*

FORCE-FEEDBACK SENDS RESISTANCE TO THE DEVIDE IN RESPOND TO ACTION OF THE USER
:
-
TACTILE OUTPUT PROVIDE THE USER WITH A PHYSICAL RESPOND FROM THE DEVICE
http://goo.gl/rizTMM
ANY PIECE OF EQUIPMENT THAT IS USED TO INPUT DATA INTO THE COMPUTER
INPUT DEVICES DIVIDED INTO TWO PARTS
MANUAL INPUT DEVICES
AUTOMATIC INPUT DEVICES
DEFINITION
A TYPE OF CONTROL DEVICES THAT REQUIRES AN INDIVIDUAL TO MANUALLY PRESS A BUTTON OR TURN A SWITCH
PUSHBUTTONS AND SELLECTOR SWITCHES AND TYPE OF MANUAL INPUTS
DEFINITION
A TYPE OF CONTROL DEVICES THAT IS SET TO AUTOMATICALLY CONTROL EACH STEP IN A PROCESS
PRESSURE SWITCHES, FLOW SWITCHES AND TEMPERATURE SWITCHES ARE TYPE OF AUTOMATIC INPUT
CONCEPT KEYBOARD
EACH BUTTON ON A CONCEPT KEYBOARD RELATES TO A PARTICULAR ITEM OR FUNCTION
TRACKBALL
USED AS AN ALTERNATIVE TO A MOUSE
JOYSTICK
JOYSTICKS USED TO BE POPULAR WITH GAMERS BUT HAVE SLOWLY BEEN REPLACE BY OTHER TYPES OF GAME CONTROLLER
A DIGITAL CAMERA TAKES PICTURES AND CAN USUALLY RECORD VIDEO
MICROPHONE
USED TO INPUT SOUND
MANUAL INPUT
DEVICES
BUTTONS CAN BE LABELLED WITH TEXT OR A PICTURES
FAST FOOD RESTAURANT OFEN USE CONCEPT KEYBOARDS BECAUSE A VERY LITTLE TRAINING IS NEEDED TO OPERATE THEM AND THEY ARE EFFICIENT- A SINGLE BUTTON CAN ORDER AN ENTIRE MEAL
TO OPERATE IT THE USER ROTATES THE BALL WHICH MOVES THE POINTER ON SCREEN
THEY ARE PARTICULARLY EASY TO USE FOR THOSE WIH LIMITED MOVEMENT IN THEIR HAND AND ARE OFTEN USED IN COMPUTER AIDED DESIGN [CAD] FOR THEIR INCREASED PRECISION OVER A MOUSE
IN CONCLUSION, JOYSTICK ARE USED TO CONTROL MACHINERY SUCH AS CRANES
DIGITAL CAMERA
THE PICTURES IT TAKEAND THE VIDEO IT RECORD ARE STORED IN FILES
THESE FILES CAN BE COPIED TO A COMPUTER AND LATER EDITED
CAN BE USED WITH VOICE RECOGNITION SOFTWARE AND A WORD PROCESSING APPLICATION TO ENTER TEXT
WEBCAMS COMMONLY HAVE MICROPHONES BUILT-IN TOO
TOUCH SCREEN
A TOUCH SENSATIVE VISUAL DISPLAY UNIT [VDU] OR SCREEN HAS A GRID OF LIGHT BEAMS OR FINE WIRE CRISS-CROSSING THE SCREEN THAT ARE USED TO DETECT TOUCH
VIDEO DIGITISER
A VIDEO DIGITISER TAKES IMAGES FROM A VIDEO CAMERA OR TELEVISION AND DIGITISES IT SO IT CAN BE READ BY AND STORED ON COMPUTER
SCANNER
CAN BE USED TO DIGITISE IMAGES
GRAPHIC TABLET
CONSISTS OF A FLAT PAD [THE TABLET] ON WHICH THE USER DRAWS WITH A SPECIAL PEN
TOUCH SCREEN USED BY MOBILES PHONES AND CASH MECHINE BECAUSE ITS ROBUST, EASY TO OPERATE AND EASY TO REPROGRAM
VIDEO SEQUENCES CAPTURED USING A VIDEO DIGITISER ARE OFTEN USED IN MULTIMEDIA PRESENTATION
SIMILAR TO PHOTOCOPIER BUT THEY MAKE DIGITAL COPY INSTEAD OF A PHYSICAL COPY
ALSO USED WITH OPTICAL CHARACTERISTIC RECOGNITION [OCR] SOFTWARE TO SCAN IN TEXT THAT IS THEN EDITABLE
THE USER DRAW THE IMAGE IS CREATED ON THE SCREEN
A DESIGNER CAN PRODUCE VERY ACCURATE ON SCREN DRAWING AS IF THEY WERE DRAWING ON PAPER
AUTOMATIC
INPUT
DEVICES
SENSOR
SENSOR ARE OFTEN USED AS PART OF A FEEDBACK CYCLE
BARCODE READER
BARCODE REPRESENTED BY BLACK VERTICAL BARS AND ARE READ BY BARCODE READER
MAGNETIC STRIP [STRIPE] READER
BUILT INTO MANY PLACTIC CARD SUCH AS DEBIT OR CREDIT AND PERSENAL IDENTITY CARD
MAGNETIC INK CHARACTERISTIC READER [MICR]
APPEAR AT THE BOTTOM OF CHEQUES
THEY COLLECT DATA CONTINUOUSLY AND TYPICALLY LINKED TO A CONTROL PROGRAM THAT SPECIFIC ACCEPTABLE LEVELS
THE PROGRAM DEVIDE WHAT TO DO NEXT BASED ON THE DATA IT'S FED BY THE SENSOR
BARCODE PRINTED ON ITEM OR THING THAT YOU BUY THAT LATER APPEARS ON YOUR RECEIPT
THE SCANNING PROCESS ASSITS IN STOCK MANAGEMENT, REDUCING THE STOCK BY ONE EACH TIME A PRODUCT IS SCANNED OR SOLD
THE MAGNETIC STRIP ON THE BACK OF THE CARD CAN HOLD THE PERSONAL DETAILS OF THE CARD OWNER AND WITH THE NECESSERY PIN WILL ALLOW ACCESS TO SECURE INFORMATION
DATA STORED ON THE STRIP IS SCANNED AND INPUT INTO A COMPUTER SYSTEM BY A MAGNETIC STRIPE READER
BANK USE MICR TO READ THE NUMBER FROM THE BOTTOM OF THE CHEQUE TO OBTAIN DATA SUCH AS ACCOUNT NUMBER AND BANK SORT NUMBER
THE PARTICULAR FONT IS USED THAT MAKE IT EASY FOR THE MACHINE TO DISCRIMINATE BATWEEN CHARACTERISTIC
THE INK IS MAGNETISED, THIS MAKE IT IMMUNE TO CREASES AND DIRTY MARKS
OPTICAL MARK READER
[OMR]
OMR READS MARKS MADE BY PENCIL
ON A PRINTED FORM INTO COMPUTER
OMR SYSTEMS ARE SUIT TO READ PRE-PRINTED FORMS AND CHECK BOXES
IN CONCLUSION
INPUT DEVICES HAVE THEIR
OWN ADVANTAGES AND
DISADVANTAGES
KEYBOARD
ADVANTAGES:
TYPISTS CAN USE WITH EASE
DISADVANTAGES
RELATIVELY SLOW
MOUSE
ADVANTAGES
NO TYPING SKILLS ARE REQUIRED
DISADVANTAGES
AT TIMES CAN BE
TRICKY TO BE USE
BAR CODE READER
ADVANTAGES
QUICK AND EASY ENTRY
OF DATA UNDER NON-IDEAL
CONDITIONS
DISADVANTAGES
NEED SPECIALIZER SOFTWARE
MICR
ADVANTAGES
HIGH VOLUME, VERY RELIABLE
DISADVANTAGES
ONLY 14 CHARACTERISTIC
REPRESENTED
MARK READER
ADVANTAGES
DISADVANTAGES
FAST INPUT
ELABORATE HARDWARE
AND SOFTWARE REQUIRED
JOYSTICK
ADVANTAGES
EASIER THAN KEYBOARD
DISADVANTAGES
SPECIAL INTERFACE NEED
ADVANTAGES
EASY IMAGE CAPTURE
DIGITAL CAMERA
ADVANTAGES:
EASY IMAGE CAPTURE
DISADVANTAGES:
STILL RELATIVELY COSTLY
GRAPHICS TABLET
ADVANTAGES:
ENABLES OPERATOR TO ENTER
PICTURES
DISADVANTAGES:
SLOW
TOUCH SCREEN
ADVANTAGES
EASY OPERATION INTUITIVE
DISADVANTAGES
NEEDS SPECIALISED HARDWARE
AND SOFTWARE
SCANNER
ADVANTAGES
NO ARTISTIC PERFOMANCE
REQUIRED
DISADVANTAGES
HIGH QUALITY QRAPHICS REQUIRE
LARGE AMOUNTS OF DISK SPACE
http://goo.gl/eWF4L1
THAT ALL FROM US
THANKS FOR WATCHING
BYE BYE ! !
Full transcript