Patent ID: 9091795
Filing Date: 2015-07-28
Classification: G02B

Abstract:
1. A light guide plate for 3D (3-dimensional) displaying, comprising upper microstructures forming an upper surface of the light guide plate, the upper microstructures being distributed on the light guide plate in a successive convex-concave alternating arrangement in a direction perpendicular to propagation direction of light emitting from a light source traveling in the light guide plate, locations on the light guide plate being divided according to the distance from the light source in the propagation direction of the light to a proximal side and a remote side, wherein with H indicating height of shape features of the upper microstructures and P indicating spacing between the shape features of the upper microstructures, the shape features of the upper microstructures show a distribution that is variable in the light propagation direction in such a way that the variation satisfies the condition that aspect ratio H/P of the upper microstructures at the proximal side of the light guide plate is less than aspect ratio H/P of the upper microstructures at the remote side of the light guide plate; wherein the upper microstructures of the light guide plate are of a fixed height and spacing between the upper microstructures of the light guide plate at the proximal side is greater than spacing between the upper microstructures of the light guide plate at the remote side.