Monitor technology

Published on 12/06/2015 by admin

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Last modified 12/06/2015

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5 Monitor technology

Terminology

Aspect Ratio The ratio of the width of a display screen to the height, e.g. 4 : 3
Bezel The plastic or metal frame round a display screen
Brightness (Luminance) The amount of light a LCD monitor produces in candela (cd) per square metre (m2), e.g. 250 to 350 cd/m2
Colour Depth The number of bits used to give the colour of one pixel, and gives the number of different colours that can be displayed at one time, e.g.

Contrast Ratio The difference in intensity between the black and white on an LCD screen

Cursor A flashing marker on the screen which indicates where the next character is to be inserted
Dot Pitch A measure of the sharpness or resolution of a screen

LCD Liquid Crystal Display monitor
Monitor A device very similar to a television, but which receives video signals directly from the computer
Native Resolution The optimum resolution of a LCD monitor. If this is changed the image quality diminishes
Examples of native resolution:

Pixel Picture cell. A pixel is the smallest number of dots which can be used by a character on the display screen
Refresh Rate Number of times the monitor is scanned by the electron beam per second

Resolution The number of ‘dots’ on a monitor screen defines the resolution of a system by describing the number of pixels horizontally and vertically, e.g. 1200 × 1200 gives a resolution of 1200 separate points horizontally and vertically
RGB Input The colour input on a monitor. The signal from the computer is taken by the monitor as a basic Red, Green and Blue input
Screen Size Cathode ray tubes

Liquid Crystal Display screens

Scrolling The movement of text or data on the display screen. Scrolling can be upwards, downwards or sideways
Thermionic Emission The release of electrons when a substance is heated

VDU Visual display unit
Viewing Angle The maximum horizontal and vertical angle that a monitor screen can be viewed at to give a clear image with accurate colours, e.g.

Voxel A three-dimensional pixel
Interlacing Consider one still picture on a cathode ray monitor (Figs 5.1, 5.2)

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