| CPC G02B 6/0016 (2013.01) | 14 Claims |
|
1. A light guide element, comprising:
a first surface;
a second surface opposite to the first surface;
a light-incident surface connected to the first surface and the second surface; and
a plurality of microstructure groups arranged on the first surface, wherein each of the microstructure groups comprises:
a first microstructure having a first light-receiving surface facing the light-incident surface; and
a second microstructure having a second light-receiving surface facing the light-incident surface,
wherein the first microstructure and the second microstructure are separated from each other, and the first microstructure and the second microstructure are mirror image structures of each other,
wherein a light-incident intersection line is provided between the first surface and the light-incident surface, a first intersection line is provided between the first light-receiving surface of the first microstructure and the first surface, a first distance is provided between the first intersection line and the light-incident intersection line in a first direction, a second intersection line is provided between the second light-receiving surface of the second microstructure and the first surface, and a second distance is provided between the second intersection line and the light-incident intersection line in the first direction, wherein a variation trend of the first distance in a second direction is opposite to a variation trend of the second distance in the second direction, the first direction is perpendicular to the light-incident surface, and the second direction is parallel to the light-incident intersection line.
|