Patent ID: 9733413
Date: 2017-08-15
CPC Classifications: F21K,G02B,G02F

Claim:
1. A display device comprising: a display panel; a light guide plate having an upper surface facing the display panel, a bottom surface and side surfaces; a light source including a plurality of light emitting diodes and being disposed laterally to the light guide plate to emit light into at least one side surface of the light guide plate; a reflective sheet disposed below the light guide plate to reflect the light upward as the light is output downward from the bottom surface of the light guide plate; a light conversion layer interposed between the light guide plate and the display panel and including a host and a plurality of quantum dots in the host to convert a wavelength of the light guided by the light guide plate upwards toward the display panel; a lower substrate having an upper surface supporting the light conversion layer, a bottom surface, and side surfaces, the lower substrate having a concavo-convex pattern formed on the upper surface and including convex parts and concave parts between the convex parts and including polyethyleneterephthalate (PET); and an upper substrate having a flat upper surface, a flat bottom surface, and side surfaces and including PET, wherein the light conversion layer includes a concavo-convex surface corresponding to the concavo-convex pattern of the lower substrate to have a concave surface and a convex surface.