Abstract: A light guide plate includes a light incidence surface, a light reflection surface, and a light emission surface. The light reflection surface forms a plurality of light-guiding structures extending in a direction substantially parallel to a light source. The light reflection surface has an edge margin section adjacent to the light incidence surface and having opposite end zones each containing auxiliary light-guiding structures that extend in a direction substantially perpendicular to the light source and has an irregular V-shaped cross-section defined by a long inclined side, which faces endwise, and a short inclined side. The auxiliary light-guiding structures are distributed from a densest condition at each end portion toward a sparsest condition at a middle portion of the edge margin section. The long side helps to redirect a greater amount of light to a desired light emission direction thereby enhancing uniformity of light emission of the light guide plate.

Abstract: A light guiding device to compensate insufficient lighting in a light guide plate's corner areas is provided. The light guiding device is positioned on the inner side of the lamp reflector neighboring to the electrodes at the ends of the lamp. The light guiding device has a reflection surface which reflects and directs lights toward the dim corner areas of the light guide plate, compensating the lighting and thereby reducing these dim areas.