Liquid Crystal Display (LCD)
•LCD stands for Liquid Crystal Display.
•It is
a flat panel electronic display device which uses light modulating properties
of liquid
crystal.
•LCD
are raster format display.
•LCD
is made from electronic
circuit, mirror, liquid crystal layer, positive and negative electrodes, polarizing films, TFT glass, glass cover etc.
•TFT (thin film transistor) glass
consists of many TFT’s.
•LCD
consists of large number of small
pixels.
•Pixels
are in between two
electrodes one
is positive and second is negative electrode.
•When no voltage is applied then liquid crystals are in random form or twisted form and when voltage is applied then they come in strengthen form.
•Each
pixel is consist of 3
colour i.e. red, green and blue (RGB).
•Many
pixels form a object using different intensities of colour of RGB.
•LCD are use for computer monitor, television, watches, mobile phone, and other display devices.
•LCD uses polarization of light and
electric field to display
objects.
•There
are two
types of
LCD one is active
pixel display and
second is passive
pixel display.
•Active
pixel display consists
of switch at each pixel and passive pixel display do not consist of switch at each pixel.
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