Electric display screen, using LED as display material, is high brightness display instrument combined computer controlling technique and graphic processing technique. Light Emitting diode, its abbreviation LED, produces red, green and blue and other colors using semiconductor P-N radiation principle caused by electricity. LED has characters of high brightness, color brightness, good stability, low consumption, high efficiency lighting and long longevity, etc.

        LED electric display screen, as "5th media" following to TV, radio, newspaper and magazine, containing above-mentioned advantages compared with TV wall、plasma display、magnetic board、neon light and other medium, is widely applied various places. The former LED only has colors of red or green with only homochromy or double color primaries. In 1993, Japanese NICHIA developed LED with high brightness blue, from then on; display screen came into colorful time.

        Diversified display screens and complicated technique obtained, so it is recommended to listen to professional suggestion of specialists when choosing display screen, so as to make chosen display screen obtaining higher performance to price ratio.