US 12,405,415 B2
Front light source module and display apparatus
Xiuyun Chen, Beijing (CN); Tingxiu Hou, Beijing (CN); Lingyu Sun, Beijing (CN); Peng Zhong, Beijing (CN); Qirui Tan, Beijing (CN); Xibin Shao, Beijing (CN); Site Cai, Beijing (CN); Guangquan Wang, Beijing (CN); Chaoyue Zhao, Beijing (CN); Ziyan Zhang, Beijing (CN); Jingjun Du, Beijing (CN); Qianqian Hao, Beijing (CN); and Yaxin Sun, Beijing (CN)
Assigned to BEIJING BOE DISPLAY TECHNOLOGY CO., LTD., Beijing (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 18/688,947
Filed by Beijing BOE Display Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Jul. 31, 2023, PCT No. PCT/CN2023/110351
§ 371(c)(1), (2) Date Mar. 4, 2024,
PCT Pub. No. WO2024/066721, PCT Pub. Date Apr. 4, 2024.
Claims priority of application No. CN202211183113.0 (CN), filed on Sep. 27, 2022.
Prior Publication US 2025/0067920 A1, Feb. 27, 2025
Int. Cl. F21V 8/00 (2006.01)
CPC G02B 6/0036 (2013.01) [G02B 6/003 (2013.01); G02B 6/0078 (2013.01); G02B 6/0083 (2013.01); G02B 6/0091 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A front light source module, comprising:
a side light source;
a light guide layer comprising a light incident side opposite to the side light source in a first direction; and
a first light adjusting layer, wherein the first light adjusting layer and the light guide layer are stacked in a third direction, a side of the first light adjusting layer away from the light guide layer is provided with a plurality of micro-groove structures, each micro-groove structure comprises: a first inclined surface and a second inclined surface opposite to each other in the first direction, the first inclined surface is configured to face the light incident side and is closer to the light incident side than the second inclined surface, an angle α between the first inclined surface and a plane where a surface of the first light adjusting layer away from the light guide layer is located is in a range from 26° to 42°, and a depth H of each micro-groove structure is in a range from 4 μm to 15 μm;
wherein a refractive index of the first light adjusting layer is greater than or equal to that of the light guide layer;
wherein a distribution density of the plurality of micro-groove structures increases gradually in a direction away from the light incident side along the first direction;
wherein the surface of the first light adjusting layer away from the light guide layer is divided into a plurality of groove structure arrangement regions arranged along the first direction;
a distance between every two adjacent groove structure arrangement regions gradually decreases in the direction away from the light incident side along the first direction;
each groove structure arrangement region is divided into a plurality of rectangular periodic regions arranged in a second direction; a length of each rectangular periodic region in the first direction is R, and a length of each rectangular periodic region in the second direction is Q, and the second direction is perpendicular to both the first direction and the third direction;
M micro-groove structures are uniformly arranged in each rectangular periodic region; and
wherein the M micro-groove structures are arranged in each rectangular periodic region to satisfy: a distance between centers of any two micro-groove structures in the first direction is greater than or equal to R/M, and a distance between centers of any two micro-groove structures in the second direction is greater than or equal to Q/M.