. Part of computer hardware which displays videos, text and images.
    . Made of circuitry, a screen, power supply and buttons to operate settings.
   . Earlier monitors were created using Cathode Ray Tubes and Fluorescent screens.
   . Today's monitors are created using flat panel display technology like LCDs LED's.

Types of Monitors:


     . Used cathode ray tube to create an image on screen.
     . From beam of electrons, it hits fluorescent screen which produces images.
     . It consists of guns which emits electrons.
     . It is heavier and used consumes much power.


     . Liquid Crystal Displays are commonly used today.
     . Uses compact fluorescent tubes to illuminate and brightens image.
     . Active part is layer of liquid hold between two pieces of polarized glass.
     . Light from behind liquid shines through glass and illuminate crystals.
     . Produces good quality image.
     . Least expensive monitors in market.


      . Light Emitting Diode are also used commonly today.
     . Expensive compared to LCD's.
     . Thinner setup by replacing fluorescent tubes with backlighting LED's.
     . Improve picture quality and more energy efficient.

   Touch Screen:

     . Screens are lighter, more efficient with touch.
     . Costlier compared to all types of monitors.
     . It provides ease to access without using keyboard and mouse.
     . It acts as both input and output device.

How it is connected to PC?

     . Using different wire systems it is connected to CPU.
       . In most cases, we use VGA cables.
     . There are three types of cables to connect monitors to CPU:
          - VGA
          - DVI
          - HDMI
     . Differences between all these types are:
AcronymVideo Graphics ArrayDigital Visual InterfaceHigh Definition Multimedia Interface
PurposeConnect monitors and TVs.
Contains only video
Connect computer monitors,
TVs, video game consoles, DVD players
Connect display monitors,
Video projectors, digital televisions
No. of pins152919-29
CompatibilityVGA to DVI
VGA to HDMI using converters
DVI to VGA using converters
HDMI to DVI using converters
SignalAnalogAnalog and digitalDigital