LED displays use light emitting diodes to radiate light in various colors like red, green, and yellow. They have a wide operating temperature range, are inexpensive and easy to interface with digital logic. LED displays come in many different sizes and shapes, and can easily display multiple digits or images. They are commonly used for outdoor signage, transportation displays, and large venue displays like sports stadiums due to their high brightness and clarity from a distance.

1. LED displays
 Light emitting diodes are used in LED
displays.
 Operation of the LED displays is based
on the injection luminescence.
 LED displays are available in many
different sizes and shapes.
 Usually LED displays radiate red,
orange, yellow or green light.
 They have a wide operating
temperature range, are inexpensive,
easily interfaced to digital logic, easily
multiplexed, do not require high
voltages and have fast response time.
 The viewing angle is good and display
of arbitrary numbers of digits is
easily assembled.

2. Working :-
 An LED TV illuminates its LCD panel with light-
emitting diodes. LEDs consist of small
semiconductors, which glow during exposure
to electric current. Specifically, this current
flows between LED anodes, which are
positively charged electrodes, and LED
cathodes, which are negatively charged
electrodes.

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14. Applications for LED Displays:
 LED displays are often found outdoors in
billboards and store signs. They can also
be found in destination signs on public
transportation vehicles or as part of
transparent glass area.
 LED panels can either be used for lighting
or for general illumination, task lighting or
stage lighting.
 LED displays can be found in sports
stadiums, public squares, train stations,
airports, highways, commercial plazas,
subways, parks, shopping centres, on tall
buildings and for corporate image
promotion and advertising.
 Due to the far viewing distances in sports
venues, the high brightness of LED
displays can meet this special requirement
and ensure that viewers get clear images.