1. A multi-panel display device, comprising:a plurality of adjoining individual display devices; and
an optical member on the plurality of individual display devices, the optical member comprising:
a frame section covering junction areas of the individual display devices where images are not displayed and portions of display areas of the individual display devices adjacent to the junction areas, the frame section comprising a plurality of light conduits, and the frame section comprising:
a bottom surface facing a display area of an individual display device, and
a top surface facing away from the display area of the individual display device, the top surface parallel to the bottom surface; and
a viewing angle increasing plate on the frame section of the optical member at a side of the frame section opposite to the plurality of adjoining individual display devices, the viewing angle increasing plate configured to receive first light with a first viewing angle from the light conduits at a first side facing the light conduits and transmit second light of a second viewing angle larger than the first viewing angle from a second side facing away from the light conduits, the viewing angle increasing plate comprising a plurality of light conduits, wherein a diameter of the light conduits of the viewing angle increasing plate is different from a diameter of the light conduits of the frame section,
wherein the plurality of light conduits of the frame section comprises a multi-core optical fiber in which a bundle of core portions is arranged in a cladding portion, and
wherein the cladding portion of the multi-core optical fiber includes a plurality of black beads including at least two or more beads having refractive indexes or sizes different from each other.