US 11,774,662 B2
Light guiding structure, light source module and display module
Jian Zhao, Beijing (CN); Chaoyue Zhao, Beijing (CN); Xiuyun Chen, Beijing (CN); Lingyu Sun, Beijing (CN); Fei Liang, Beijing (CN); Tingxiu Hou, Beijing (CN); Peng Zhong, Beijing (CN); Jingjun Du, Beijing (CN); and Yongkang Xiao, Beijing (CN)
Assigned to BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/417,387
Filed by BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Sep. 21, 2020, PCT No. PCT/CN2020/116548
§ 371(c)(1), (2) Date Jun. 23, 2021,
PCT Pub. No. WO2022/056918, PCT Pub. Date Mar. 24, 2022.
Prior Publication US 2022/0326428 A1, Oct. 13, 2022
Int. Cl. F21V 8/00 (2006.01)
CPC G02B 6/0045 (2013.01) [G02B 6/0096 (2013.01)] 18 Claims
OG exemplary drawing
 
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.