Patent ID: 8531625
Filing Date: 2013-09-10
Classification: G02B

Abstract:
1. A light guide plate for displaying a three-dimensional (3D) image, the light guide plate comprising: a transparent body configured to guide internally reflected light, the transparent body formed in a flat panel shape, having two opposite side surfaces on which a first incident surface and a second incident surface are formed, and having a front surface on which an exit surface is formed; and a plurality of viewing zone separation units aligned adjacent to the exit surface, wherein: the transparent body has a single refractive index and envelops and contacts the entire external surface of each of the viewing zone separation units, and each of the plurality of viewing zone separation units comprises a first reflective surface inclined with respect to the first incident surface, and a second reflective surface extending inclined with respect to the second incident surface, such that first light incident through the first incident surface and propagated with total internal reflection in the transparent body is reflected on the first reflective surface to be emitted through the exit surface, and that second light incident on the second incident surface and propagated with total internal reflection in the transparent body is reflected on the second reflective surface to be emitted through the exit surface, thereby separating the first light and the second light into different viewing zones.