Patent ID: 8272774

Claim:
A light guiding plate comprising: a light incident surface where light emitted from a light source enters; an opposite surface facing the light incident surface; a light emitting surface coupled between the light incident surface and the opposite surface; and a light guide surface facing the light emitting surface, the light guide surface having a prism area in which a plurality of linear shaped prisms are formed, each linear shaped prism having a short axis along a cross-section of the linear shaped prism and a long axis perpendicular to the short axis and extending along a length of the linear shaped prism, the long axis of each linear shaped prism extending from the light incident surface toward the opposite surface, a non-prism area in which a flat area is formed adjacent to the light incident surface, and a connection area interposed between the prism area and the non-prism area and having a different height with respect to the non-prism area, wherein a height of the light incident surface is greater than the different height of the connection area with respect to the non-prism area, and most of the light emitted from the light source enters the light incident surface.