What is an LED Display Screen?

  • An LED display Screen is a video display screen made up of light-emitting diodes, or LEDs. LEDs are small electronic devices which produce a very efficient light source. They are widely used in everyday devices from traffic lights to remote controls. Many LED displays screen are used outdoors in billboards and store signs.


    A typical LED display screen is composed of many LED panels, which are sometimes used as a form of lighting or illumination rather than for display. Two classes of LED panels exist: conventional LED panels, which use discrete LEDs, and surface-mounted device (SMD) panels. Conventional panels are the more common of the two, especially for large outdoor display screens. In this type of LED panel, clusters of red, green, and blue LEDs are grouped together to form numerous square-shaped pixels.


    Outdoor LED display screens are a popular medium to carry commercial advertisements and various types of information for the public. They provide high visibility and can be easily fixed on different kinds of structures like buildings, hoarding boards, shop windows, etc.


    Indoor and outdoor displays: For indoor environments, the display brightness required is moderate. Since such displays will be viewed from close by, they have a wide visual angle. They are also lightweight and have a high density. For outdoor displays, dot density is relatively sparse and brightness requirements are different since viewing conditions vary during the night and during daylight hours. Also, these displays need to be seen from a much longer distance. The display cabinet should be able to withstand environmental conditions like wind, rain, lightning, etc.


    Displays with a single colour, double primary colours and three primary colours: Single colour displays are based on the lighting material, the most commonly used being the single red colour, and on some special occasions, yellow and green. LED displays with double primary colours are made up of red and green LEDs. Screens with three primary colours offer red, blue and green LEDs. These can display white balance and 16,777,216 colours.


    Synchronised and unsynchronised displays: Synchronisation is the working mode of an LED display, which is similar to a computer monitor. It can display many grayscale colours, which can achieve the effect needed in multimedia advertising.


    In the case of asynchronisation, an LED display screen can store and auto-play the characters and non-grayscale images. The images are edited in the PC and transmitted to an LED display (where they get auto-played) via a serial interface or other network interface. Usually, it can’t display many grayscale colours, and is mostly used to display characters.


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