Out put devices and their uses (Printers (Laser printers (Advantages …
Out put devices and their uses
Can be used with light pen to produce and modify drawings using CAD software.
Sometimes they are used where several people need to view the screen at the same time, like for example where several designers are viewing a prototype as they have a wide angle of viewing.
They are bulky and take a a large amount of space on the desk.
They generate a lot of heat and can make rooms really hot in the summer.
Glare on the screen can be a problem.
They are much heavier and present a safety problem when being moved, due its heavy weight.
TFT (thin film transitor/LCD) monitors
They are very light this i why it is used in laptops.
They are thin so they don´t take up much desk space.
They are cheaper to run as they use less power than CRT monitors.
They can be easily positioned to suit the user because they are light.
The radiation given off is much less than a CRT monitor
They do not get as hot as CRT monitors so energy is not being waste in summer using air conditioning to cool offices down.
They do not create glare and may be less likely to cause eye damage.
They are ideal where only one person needs to view the screen.
They are very difficult to repair. Its better to buy another one rather than repairing it.
They have a narrow viewing angle so the image is not as clear as CRT. Less useful if many people is viewing the screen.
Advantages : :check:
Wide viewing angle makes it easier for groups to watch.
They are much thinner than CRT monitors so they take less space.
Less glare compared to CRT monitors.
Much more energy efficient compared to a CRT monitor.
Not as energy efficient efficient as an LED monitor.
Not as good as graduating shades of colour compared with a LED monitor.
Not as good used in dimly-lit rooms.
Thinner than CRT about the same thickness as LCD
Lighter than CRT monitors.
More energy saving than to LCD and CRT.
Better picture quality when watching sports or playing games.
More expensive than LCD monitors.
If you sit off-centre the visibility is poor.
Very quiet very important for some offices.
Toner cartridge lasts longer than inkjet cartridge.
High printing speed.
Fewer problems than inkjet printers.
Inkjet pages can be wet but with laser printers they are no wet pages.
They are cheaper to run.
High quality printouts.
More expensive to buy.
Colour lasers are very expensive to buy.
Power consumption is high.
Most laser printers are larger than inkjet printers.
Relatively small compared to laser printers.
They do not cause harm to the environment.
High quality printing. Ideal for printing photographs, brochures and illustrated text.
Quietness of operation
They are usually more cheaper than laser printers.
High cost of ink cartridges.
Paper printouts might be wet because of the ink.
Cartridges do not last long.
Dot matrix printers
Can be used to print multi-part stationery.
Can be used with continuous stationery.
Cheaper to run than inkjet printers.
Low quality printouts.
Unsuitable for printing graphic.
Many people can view what is being presented.
Can show video to a large audience who might be sitting away from the screen.
Not good quality image when seen in computer screen.
The projector fans creates a loud noise.
Requires a dark room otherwise the image will appear dim.
Requires the user to run and control the equipment.
Wide format printers
Can print paper larger than A4.
No need of having a service of professional print shops.
Printouts larger than A4.
Expensive if it is only used occasionally.
Wide format printers are quite large.
Can convert designs into prototypes very quick compared to traditional manufacturing prototypes.
It is cheaper to use 3D printers than traditional methods of manufacture.
Much easier to produce as they can just be printed out from designs using design software on the computer.
Using 3D printers is less skilled than the use of older techniques.
Dangerous items as weapons can be manufactured.
There is a limited number of material used in 3D printer which what can be manufactured.
Speakers are outputs which gives sound speaker can be wireless or others inside the computer
They are outputs which are controlled by signals given off by a computer to turn on or off electric motor.
This outputs devices which act as warning signs or indicate that a control process has been completed.
Heaters can be switched on or off according to control signals issued by a computer.
Lights and lamps can be controlled using a control system issued by a computer that has a light sensor to sense light level.