| 摘要 |
A light guide plate (210) in accordance with various embodiments comprises:
a body (211) having a light incident part (210a) at a first side surface of the body (211); an upper optical pattern (213) at a top side of the body (210); and a lower optical pattern (215) at a bottom side of the body (210), wherein the lower optical pattern (215) is an embossed pattern protruding from the bottom side of the body (211) and having a trapezoid shape, wherein a first end of the trapezoid shape has a first width and a second end of the trapezoid shape has a second width, wherein the first end is closer to the light incident part (210a) than the second end, and wherein the first width is narrower than the second width. In one embdiment the upper optical pattern comprises a plurality of lenticular lens patterns or round prism patterns extending in parallel along a direction from the first side surface of the body to an opposite second side surface, and an interval of first lenticular lens patterns or round prism patterns disposed in a partial luminance area (PLA) of the light guide plate differs from an interval of second lenticular lens patterns or round prism patterns in an area of the light guide plate other than the PLA. In another embodiment the loight incident part includes a side light collection pattern (217) and a side diffusion pattern (219), wherein the side light collection pattern includes a plurality of lenticular lens patterns in a PLA corresponding to a partial display area and wherein the side diffusion pattern includes a plurality of prism patterns in a surrounding area of the PLA. A backlight unit comprising the light guide plate is configured to irratdiate light selectively onto a whole display area of a liquid crystal display panel or onto a partial display area thereof, and futher comprises a light source unit adjacent the light incident part of the light guide plate. |
