OUTPUT DEVICES in Computer......!!!The devices which are used to display the data to the user either in the form of hard copy or soft copy are called output devices.

SPEAKERS
:
Speakers receive the sound in the form of electric current from the sound card & convert it to sound format. These are used for listening music, chatting , seminars for presentations etc.

VDU (Visual Display Unit)
:
This is also called monitor. It is used to get the data in the form of soft copy. Their functioning is exactly similar to the television. It contains a CRT which emits the electrons to trace a regular pattern of horizontal lines on the screen.

PRINTER

These devices gives the hard copy of the output. These are in different types.

Impact - Have mechanical contact in between paper & printing head

Non Impact - No mechanical contact between paper & printing head

IMPACT :

Line Printers - print line wise (E.g. Drum Printer)

Character Printer - print character wise (E.g. Daisy Printer)

NON IMPACT -

Electromagnet Printers
:
Thermal Printers
:
Electrostatic Printers
:
Inkjet Printers:

Laser Printers:

LCD (Liquid Crystal Display):

These screens are used in laptops & notebook sized PCs. A special type of liquid is sandwiched between two plates. The top plate is clear & bottom plate is reflective. The molecules in these liquids are normally aligned & the computer signals are used to align these molecules