| 主权项 |
1. An illumination device of an edge light type, comprising:
a primary light source provided at one side surface of a light guide plate, the light guide plate including an emission surface, a bottom surface facing the emission surface, and an incident end surface configured to receive light emitted from the primary light source, wherein the primary light source is disposed in parallel to an X-axis, the light guide plate is disposed in parallel to an X-Y plane, the incident end surface of the light guide plate is aligned in parallel to a Y-Z plane, the light guide plate includes a plurality of recess patterns provided on the bottom surface in parallel to the X-axis direction at a predetermined pitch and a plurality of protrusion patterns provided on the emission surface in parallel to the Y-axis direction at a prearranged pitch, and each of the recess patterns is defined to reflect the light incident into the light guide plate through the incident end surface by an inclined surface on the recess patterns of the bottom surface such that emission light emitted from the emission surface has a maximum luminous intensity at an angle between 25 degree to 65 degree with respect to a Z-axis direction. |
