A light guide plate includes a main body, first stripe structures and second stripe structures. The main body has an optical surface, a light-incident surface and an opposite light-incident surface. The main body has a hole passing through the optical surface, and the optical surface has a first region and a second region which are separated by an imaginary line. The imaginary line intersects the hole. The hole has a first side near the opposite light-incident surface and a second side near the light-incident surface. A portion of each of the first stripe structures is disposed in the first region. The second stripe structures are disposed in the second region. An extending direction of at least one portion of each first stripe structure is vertical to the light-incident surface, and a portion of the second stripe structures extends to the first side of the hole near the opposite light-incident surface.

A light guide plate includes a main body, first stripe structures and second stripe structures. The main body has an optical surface, a light-incident surface and an opposite light-incident surface. The main body has a hole passing through the optical surface, and the optical surface has a first region and a second region which are separated by an imaginary line. The imaginary line intersects the hole. The hole has a first side near the opposite light-incident surface and a second side near the light-incident surface. A portion of each of the first stripe structures is disposed in the first region. The second stripe structures are disposed in the second region. An extending direction of at least one portion of each first stripe structure is vertical to the light-incident surface, and a portion of the second stripe structures extends to the first side of the hole near the opposite light-incident surface.

A light guide plate includes a main body, first stripe structures and second stripe structures. The main body has an optical surface, a light-incident surface and an opposite light-incident surface. The main body has a hole passing through the optical surface, and the optical surface has a first region and a second region which are separated by an imaginary line. The imaginary line intersects the hole. The hole has a first side near the opposite light-incident surface and a second side near the light-incident surface. A portion of each of the first stripe structures is disposed in the first region. The second stripe structures are disposed in the second region. An extending direction of at least one portion of each first stripe structure is vertical to the light-incident surface, and a portion of the second stripe structures extends to the first side of the hole near the opposite light-incident surface.

A light guide plate includes a main body, first stripe structures and second stripe structures. The main body has an optical surface, a light-incident surface and an opposite light-incident surface. The main body has a hole passing through the optical surface, and the optical surface has a first region and a second region which are separated by an imaginary line. The imaginary line intersects the hole. The hole has a first side near the opposite light-incident surface and a second side near the light-incident surface. A portion of each of the first stripe structures is disposed in the first region. The second stripe structures are disposed in the second region. An extending direction of at least one portion of each first stripe structure is vertical to the light-incident surface, and a portion of the second stripe structures extends to the first side of the hole near the opposite light-incident surface.

A light guide plate includes a main body, first stripe structures and second stripe structures. The main body has an optical surface, a light-incident surface and an opposite light-incident surface. The main body has a hole passing through the optical surface, and the optical surface has a first region and a second region which are separated by an imaginary line. The imaginary line intersects the hole. The hole has a first side near the opposite light-incident surface and a second side near the light-incident surface. A portion of each of the first stripe structures is disposed in the first region. The second stripe structures are disposed in the second region. An extending direction of at least one portion of each first stripe structure is vertical to the light-incident surface, and a portion of the second stripe structures extends to the first side of the hole near the opposite light-incident surface.

A light guide plate includes a main body, first stripe structures and second stripe structures. The main body has an optical surface, a light-incident surface and an opposite light-incident surface. The main body has a hole passing through the optical surface, and the optical surface has a first region and a second region which are separated by an imaginary line. The imaginary line intersects the hole. The hole has a first side near the opposite light-incident surface and a second side near the light-incident surface. A portion of each of the first stripe structures is disposed in the first region. The second stripe structures are disposed in the second region. An extending direction of at least one portion of each first stripe structure is vertical to the light-incident surface, and a portion of the second stripe structures extends to the first side of the hole near the opposite light-incident surface.

There is disclosed an earth cutting apparatus (200) comprising a plurality of articulated elements (210, 212) including at least a first element (210) having a mounting structure (214) thereon and an adjacent second element (212) hingedly connected to the first element (210). An earth cutting member (216) is provided including a proximal end (216.1) which is pivotally mounted to the mounting structure (214) of the first element (210) and an earth cutting end (216.2). The earth cutting member (216) is slidably connected (218) to the adjacent second element (212) and moveable between an extended position (220) and a retracted position (222), such that hinged movement of the adjacent second element (212) relative to the first element (210) causes the earth cutting member (216) to slidably extend from the adjacent second element (212) to the extended position (220) for operatively cutting earth. Hinged movement of the adjacent second element (212) in an opposite direction causes the earth cutting member (216) to slidably retract to the retracted position (222).

An earth cutting apparatus comprising a plurality of articulated elements including at least a first element having a mounting structure thereon and an adjacent second element hingedly connected to the first element. An earth cutting member is provided including a proximal end which is pivotally mounted to the mounting structure of the first element and an earth cutting end. The earth cutting member is slidably connected to the adjacent second element and moveable between an extended position and a retracted position, such that hinged movement of the adjacent second element relative to the first element causes the earth cutting member to slidably extend from the adjacent second element to the extended position for operatively cutting earth. Hinged movement of the adjacent second element in an opposite direction causes the earth cutting member to slidably retract to the retracted position.

A light guide plate includes a main body, first stripe structures and second stripe structures. The main body has an optical surface, a light-incident surface and an opposite light-incident surface. The main body has a hole passing through the optical surface, and the optical surface has a first region and a second region which are separated by an imaginary line. The imaginary line intersects the hole. The hole has a first side near the opposite light-incident surface and a second side near the light-incident surface. A portion of each of the first stripe structures is disposed in the first region. The second stripe structures are disposed in the second region. An extending direction of at least one portion of each first stripe structure is vertical to the light-incident surface, and a portion of the second stripe structures extends to the first side of the hole near the opposite light-incident surface.

A subsoil tool for ameliorating soil compaction having a shank attached to a toolbar of a tractor, wings on forward wing links pivotally engaged to the shank, and following wings on a wing rod pivotally engaged with the forward wing link. The forward wing links are positioned near the bottom of the shank in front of the rear of the shank. The wing rod is positioned behind the shank. A drive box having a hydraulic cylinder is engaged to the toolbar and pivotally engaged with the wing rod. In use, a portion of the subsoil tool may be inserted below a surface of the soil, the height of the subsoil tool may be adjusted, the subsoil tool may be rotated, and the hydraulic cylinder may be cycled to move the forward wings and following wings.