Light guide plate having uniform light emission and manufacturing method thereof

摘要

A light guide plate includes a light incident surface, a side surface opposite to the light incident surface, and a light emitting surface connecting to the light incident surface and the side surface. The light emitting surface has a first portion adjacent to the light incident surface and a second portion adjacent to the side surface. The first portion defines a number of first micro recesses. The second portion defines a number of second micro recesses. In a plane perpendicular to the light emitting surface and the side surface, a cross section of each second micro recess is a portion of an ellipse. A major axis of the ellipse is inclined towards the light incident surface. A maximum depth of each second micro recess is greater than a maximum depth of each first micro recess.

主权项

1. A light guide plate, comprising:
a light incident surface; a side surface opposite to the light incident surface; and a light emitting surface connecting to the light incident surface and the side surface, the light emitting surface comprising a first portion and a second portion, the first portion adjacent to the light incident surface, the second portion adjacent to the side surface, wherein the first portion defines a plurality of first micro recesses, the second portion defines a plurality of second micro recesses arranged in at least one line parallel to the side surface; in a plane perpendicular to the light emitting surface and the side surface, a cross section of each of the second micro recesses is a portion of an ellipse, a major axis of the ellipse is inclined relative to the light incident surface, a maximum depth of each of the second micro recesses is greater than a maximum depth of each of the first micro recesses, and thus the second micro recesses reflect most of light rays transmitted in the light guide plate to the light emitting surface to increase the brightness of the second portion.