Abstract: A light guide plate is adapted for use with at least one light source that is capable of providing source light beams. The light guide plate includes a plate body, and a plurality of light-guiding structures that are distributed on the plate body. Each of the light-guiding structures is in a substantially quadrilateral pyramidal form, and includes a quadrilateral lower end that has four corners, and a tapered upper end that is disposed opposite to the lower end. Each of the light-guiding structures further includes four sides, each of which is defined by the upper end and a corresponding adjacent pair of the corners, adjacent ones of the sides being interconnected.

Abstract: A backlight module includes: a light source capable of providing light beams; a light guide plate including a plate body that has a light exit side, a base side and a light incident side, and a plurality of quadrilateral pyramidal light-guiding structures distributed on the plate body and capable of changing optical paths of the light beams propagating through the light guide plate such that the light beams exit the plate body with angles relative to a normal of the light exit side that fall within a predefined range; a reflector layer disposed proximate to the base side; and an optical layer disposed proximate to the light exit side, and having a light collecting side that confronts the light exit side, the optical layer being formed with a plurality of prismatic structures at the light collecting side, the prismatic structures extending parallel to the light incident side.

Abstract: A light guide plate is adapted for use with at least one light source that is capable of providing source light beams. The light guide plate includes a plate body, and a plurality of light-guiding structures that are distributed on the plate body. Each of the light-guiding structures is in a substantially quadrilateral pyramidal form, and includes a quadrilateral lower end that has four corners, and a tapered upper end that is disposed opposite to the lower end. Each of the light-guiding structures further includes four sides, each of which is defined by the upper end and a corresponding adjacent pair of the corners, adjacent ones of the sides being interconnected.