DISPLAY DEVICE, CAPABLE OF DISPLAYING CHARACTERS WITHOUT A BLURRING PHENOMENON IN ORDER TO IMPROVE THE RELIABILITY OF A LIGHT EMITTING DIODE DISPLAY

摘要

PURPOSE: A display device is provided to improve the external appearance of a light emitting diode(LED) display by covering the frame of light emitting parts.;CONSTITUTION: A light emitting module(120) comprises an LED array(122). A sheet type window(130) is formed on the light emitting module. The window is composed of a bundle of optical medium through which light transmits. The optical medium has a circular or a polygonal pillar shape. A light absorbent adhesive(134) adheres spaces in the optical medium. The refractive index of a central core of the optical medium is higher than that of the peripheral part.;COPYRIGHT KIPO 2010