the present invention relates to a light - emitting diode display apparatus used for a display such as a type of standing signboard . the light - emitting diode display is comprised of light - emitting diodes which use a plurality of colors , including blues , reds and greens , arranged in a specific pattern such as a matrix pattern . the display is appropriate for displaying either a moving or a stationary graphical image by powering the leds to combine to produce specific colors .