Output

Large Displays

• Digital Projectors
• Projects a larger version of the media to be viewed by more people
• They can be portable-mostly mounted on ceilings
• Variation in brightness
• Interactive Whiteboards
• Used to project images
• Touch sensitive surface that can be written on using
• Both input and output devices
• Handwriting recogonition

Diapositiva 2

Large Displays

• Plasma screens
• Television screens,Computer monitors
• Often found in public areas
• Illuminating fluorescent light to form the image
• Available in very large sizes
• Small Displays
• Mobile Phone screens
• Pre enabled internet access
• Use of software applications
• PDA's (Smartphones)

Printers

• Laser printers
• Print a full page
• Laser beam on a light sensitive drum-that uses electrostatic charges to attract toner particles
• Page passes to heated fuser unit to melt the toner on the page so documents can be printed quickly
• Less expensive to buy
• Produce clear text and diagrams
• Lower resolution than inkjets as fewer colors used
• Inkjet Printers
• Cheaper than lasers
• Expensive to run
• Work by spraying ink on to the paper
• Multi Function
• Built in scanner/fax machine/use inkjet tech

Printers and Plotters

• Dot Matrix
• Multipart stationery is made up of several layers in different colors. When fed through a DM printer several copies can be amde at onec
• To print on multipart stationary
• Uses continuous stationery
• Used in industrial situations where quality is sacrificed for efficiency
• Plotters
• Flat-bed plotters use pens which move across the paper to draw detailed and accurate images
• Move paper across rollers whilst pens move back and forth
• Engineers and Architects use bery large inkjet printers
• Expensive to but used only for specialist purposes
• Produce full color graphics

Printers

• Professional printers
• Used by professional print shops
• Companies offering such services over the internet
• Accept files in Adobe acrobat reader format
• Use offset litho printing
• Making images of all colors involved
• print one after another
• Printed on huge rolls of paper
• Saves staff time
• Photo printing
• Specialist printers to take 6/8 inch photos
• Convenient and easy to carry around
• Can be linked via camera or Bluetooth
• Ink may be expensive
• Normally expensive to run for standard documents

Speakers

• Speakers
• Play music produced by a sound card
• Vary in size,quality and appearance/level of volume
• Many monitors and laptops have built in speakers for general purpose use. Sound quality isn't as high
• Example-satellite navigation systems
• Headphones
• Produce sound directly into the user's ear
• Useful for public/crowded places
• Used in call centers
• Could cause hearing damage if volume is too high
• Wireless headsets and hands free can also be used
• Special-purpose output devices
• Large monitor for partially sighted users
• Increased font size
• Magnifying display using zoom
• Adjusting color contrast between font and bg
• Using sound rather than visuals may also be helpful
• Text can be read--audible spell check
• Websites can use keywords to describe graphics

Choosing an output device

• What kind of image needs to be viewed?
• Large monitors could take up desk space
• Reduces the need to scroll
• Needs to have a high resolution
• Monitor that is large enough to view their work
• Where is it going to be viewed
• On the move/via a laptop
• Size of the display
• Large screens-less comfortable to carry around
• Depends on the task to be done
• Laptops may be easier than PDA's
• Greasy/dirty situations--factory/food outlet
• Who is going to view the image?
• Internet access
• Large high resolution monitors so that the webpage looks fine to view on the device
• Consider specifications
• Restricts potential audience
• MP companies have their own web portals
• Text only with no graphics

Printers

• What is to be printed
• Black and white or color
• Monochrome laser printer for b.w
• Lower running costs than inkjets
• high quality text
• Inkjets popular for home use mixture of everything
• How many documents?
• High volumes handled quickly by lasers
• bigger paper trays
• Built in NIC's/can be used by any machine in the network
• Workgroup printers designed with more robust components making them suitable for higher usage
• Multiple paper trays and duplex units to print double sided
• Lower running costs but expensive to purchase
• What kind of media?
• Size of media to be printed
• Larger paper size expensive printers
• Thickness of paper
• Transparencies and labels-available for inkjets
• More versatile regarding specialist media
• Metallic/plastic/high gloss/sheets of cloth

Who is to use the printer?

• Shared between networks--needs to be networked
• Home networks can share printers
• Connect wireless to phones/laptops
• Connect using network cards
• Network rights can be set to restrict access to specific printers