US 12,449,696 B2
Backlight module, display device and assembled display device
Haijun Shi, Beijing (CN); Changjia Fu, Beijing (CN); Bochang Wang, Beijing (CN); Zhanchang Bu, Beijing (CN); Hongbo Feng, Beijing (CN); and Zhuang Xu, Beijing (CN)
Assigned to Beijing BOE Display Technology Co., Ltd., Beijing (CN); and Beijing BOE Technology Development Co., Ltd., Beijing (CN)
Appl. No. 18/692,271
Filed by Beijing BOE Display Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Jul. 13, 2023, PCT No. PCT/CN2023/107330
§ 371(c)(1), (2) Date Mar. 14, 2024,
PCT Pub. No. WO2024/022125, PCT Pub. Date Feb. 1, 2024.
Claims priority of application No. 202210892030.2 (CN), filed on Jul. 27, 2022.
Prior Publication US 2025/0147359 A1, May 8, 2025
Int. Cl. G02F 1/13357 (2006.01)
CPC G02F 1/133608 (2013.01) [G02F 1/133606 (2013.01); G02F 1/133611 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A backlight module, comprising:
a backplate, comprising a bottom wall;
a light source, disposed on the bottom wall;
an optical film layer, disposed opposite to the bottom wall and located on a light emitting side of the light source; and
a middle frame, comprising a first frame body and a second frame body, wherein the first frame body is arranged around a periphery of the bottom wall, the second frame body is arranged on an inner side surface of the first frame body, and the second frame body comprises a transparent structure; and the optical film layer is supported at one end of the second frame body away from the bottom wall,
wherein the inner side surface of the first frame body comprises a first slope, an included angle between the first slope and the bottom wall of the backplate is an obtuse angle, and the second frame body is disposed on the first slope,
wherein the inner side surface of the first frame body further comprises a second slope, the second slope is located between the first slope and the bottom wall of the backplate, an included angle between the second slope and the bottom wall of the backplate is an obtuse angle, and the included angle between the second slope and the bottom wall of the backplate is smaller than the included angle between the first slope and the bottom wall of the backplate, and
wherein a side of the second frame body facing away from the first slope comprises: a third slope, connected to the second slope and being coplanar with the second slope; a fourth slope, an included angle between the fourth slope and the bottom wall of the backplate being greater than an included angle between the third slope and the bottom wall of the backplate; and a support surface, provided at the end of the second frame body away from the bottom wall of the backplate, wherein the support surface extends towards the first slope, is connected between the fourth slope and the first slope, and is parallel to the bottom wall of the backplate.