CPC G02B 6/0045 (2013.01) [G02B 6/0096 (2013.01)] | 18 Claims |
1. A light guiding structure, comprising:
a light guiding body comprising a light incident surface and a light exit surface which are disposed opposite to each other; and
at least one light guiding cavity disposed in the light guiding body,
wherein:
each of the light guiding cavities comprises a first end close to the light incident surface of the light guiding body and a second end away from the light incident surface of the light guiding body, and the light guiding cavity extends from the first end to the second end;
there are a plurality of light guiding cavities which are divided into a plurality of groups of light guiding cavities, wherein each group of light guiding cavities comprises a central plane located in the light guiding body, and the group of light guiding cavities comprises n first light guiding cavities located on one side of the central plane and n second light guiding cavities located on the other side of the central plane, where n is a natural number greater than or equal to 1;
a distance between a first end of a first light guiding cavity and a corresponding central plane is less than a distance between a second end of the first light guiding cavity and the corresponding central plane; and a distance between a first end of a second light guiding cavity and a corresponding central plane is less than a distance between a second end of the second light guiding cavity and the corresponding central plane;
the central plane is a virtual plane perpendicular to the light incident surface in the light guiding body; and
the first light guiding cavity comprises a first portion close to the light incident surface of the light guiding body and a second portion away from the light incident surface of the light guiding body, and cross-sectional shapes of the first portion and the second portion along a plane perpendicular to the light exit surface of the light guiding body include any of the followings:
the cross-sectional shape of the first portion is a curved strip shape, and the cross-sectional shape of the second portion is a curved strip shape;
the cross-sectional shape of the first portion is a curved strip shape, and the cross-sectional shape of the second portion is a folded strip shape;
the cross-sectional shape of the first portion is a curved strip shape, and the cross-sectional shape of the second portion is a straight strip shape;
the cross-sectional shape of the first portion is a folded strip shape, and the cross-sectional shape of the second portion is a curved strip shape; or
the cross-sectional shape of the first portion is a straight strip shape, and the cross-sectional shape of the second portion is a curved strip shape.
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