US 12,326,633 B2
Front light source and display device
Yue Guo, Beijing (CN); Yanjun Sun, Beijing (CN); Minghui Zhang, Beijing (CN); Yaohui Wang, Beijing (CN); Zhengang Gao, Beijing (CN); Longyue Gao, Beijing (CN); Qian Zhang, Beijing (CN); and Dongyu Liu, Beijing (CN)
Assigned to Beijing BOE Display Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 18/696,302
Filed by Beijing BOE Display Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Aug. 1, 2023, PCT No. PCT/CN2023/110625
§ 371(c)(1), (2) Date Mar. 27, 2024,
PCT Pub. No. WO2024/046014, PCT Pub. Date Mar. 7, 2024.
Claims priority of application No. 202211042221.6 (CN), filed on Aug. 29, 2022.
Prior Publication US 2025/0004331 A1, Jan. 2, 2025
Int. Cl. G02F 1/1335 (2006.01)
CPC G02F 1/133616 (2021.01) 18 Claims
OG exemplary drawing
 
1. A front light source, comprising:
a housing extending along a first direction, and a side wall of the housing having an opening extending along the first direction;
a supporting frame, located inside the housing and extending along the first direction, wherein the supporting frame comprises a supporting surface;
a light bar, wherein the light bar extends along the first direction and is attached to the supporting surface of the supporting frame; and a side of the light bar far away from the supporting surface has a plurality of light-emitting units arranged along the first direction;
a polarizing lens, wherein the polarizing lens is located between the light bar and the opening and extends along the first direction;
wherein the polarizing lens comprises: a light incident surface, a light exiting surface, a first reflective curved surface and a second reflective curved surface, extending along the first direction;
the light incident surface is arranged close to the light bar, the light exiting surface is opposite to the opening and parallel to the light incident surface;
the first reflective curved surface and the second reflective curved surface are connected between the light incident surface and the light exiting surface, and distances between the first reflective curved surface and the second reflective curved surface gradually increases along a direction in which the light incident surface points to the light exiting surface; and
both the first reflective curved surface and the second reflective curved surface protrude toward an inner wall of the housing, and a curvature of the first reflective curved surface is greater than a curvature of the second reflective curved surface.