2. “An output device is any hardware used to communicate processed data to the user, e.g. Monitor, speakers and printers.”

3.  One of the most popular output devices  Inkjet printers  Laser printers  Graph plotters  Dot matrix printers  Thermal printers  Braille printers

4.  Popular for domestic use  Small jets of ink sprayed on to paper  Three systems used for printing  Nozzles controlled by crystals which change shape  Ink heated and pushed through nozzles (bubblejet)  Continuous flow – ink squirts continuously from nozzles

5.  The most versatile – but are more expensive  Pages are set up in full before printing  They have four main parts:  Rotating drum – has an electrical charge  Laser – etches a negative electrically charged image onto the drum  Toner cartridge – drum attracts ink from toner cartridge to areas that are charged  Fuser unit – heats the paper, to make ink stick

6.  Often used with CAD  An arm moves over the paper, spraying ink  Designed to handle large sheets of paper  Output – high quality vector graphics  Good for architectural drawings

7.  Used a lot in the past – receipts  Print a series of dots that form characters  Useful if carbon copies are needed as they are impact printers

8.  Often used in calculators and fax machines  Marks transferred to paper, using heat

9.  Also known as embossers  Create sequences of raised dots on the paper

10.  Also known as VDUs (Visual Display Units)  Two main types :  CRT (Cathode Ray Tube)  Flatscreen – LCD – TFT - Plasma

11.  This presentation is being output by a LCD projector.  Also known as beamers

12.  Add another dimension  Integral part of any multimedia system  Can be used as primary output – speech output for the visually impaired