US 12,189,166 B2
Backlight assembly and display apparatus
Yongle Qi, Beijing (CN); Rui Han, Beijing (CN); Qing Ma, Beijing (CN); Daekeun Yoon, Beijing (CN); Dong Cui, Beijing (CN); Zhipeng Zhang, Beijing (CN); Yuanyuan Zhu, Beijing (CN); Weining Chi, Beijing (CN); Fengping Wang, Beijing (CN); Shouyang Leng, Beijing (CN); Wenyang Li, Beijing (CN); and Yue Zhai, Beijing (CN)
Assigned to Beijing BOE Display Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 18/015,723
Filed by Beijing BOE Display Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Feb. 14, 2022, PCT No. PCT/CN2022/076235
§ 371(c)(1), (2) Date Jan. 12, 2023,
PCT Pub. No. WO2023/151087, PCT Pub. Date Aug. 17, 2023.
Prior Publication US 2024/0248250 A1, Jul. 25, 2024
Int. Cl. F21V 8/00 (2006.01)
CPC G02B 6/004 (2013.01) [G02B 6/0068 (2013.01); G02B 6/0076 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A backlight assembly, comprising a first light guide plate and a second light guide plate disposed in parallel and opposite to each other, a first light source disposed on a side of the first light guide plate, and a second light source disposed on a side of the second light guide plate, wherein the first light source and the second light source are located on opposite sides of the backlight assembly, and the second light guide plate is disposed on a light emitting side of the first light guide plate;
a plurality of first microstructures are disposed on a surface of the first light guide plate facing away from the second light guide plate, and light emitted by the first light source is able to be emitted from a surface of the first light guide plate facing the second light guide plate at a first set emitting angle, after being incident into the first light guide plate and reflected by the plurality of first microstructures;
a plurality of second microstructures are disposed on a surface of the second light guide plate facing the first light guide plate, and light emitted by the second light source is able to be emitted from a surface of the second light guide plate facing away from the first light guide plate at a second set emitting angle, after being incident into the second light guide plate and reflected by the plurality of second microstructures;
taking a plane perpendicular to a light emitting surface of the backlight assembly as a reference plane, in the reference plane, the first set emitting angle is biased to one side compared with a front viewing angle direction of the light emitting surface of the backlight assembly, and the second set emitting angle is biased to the other side compared with the front viewing angle direction of the light emitting surface of the backlight assembly;
the first light source and the second light source are under a same current, and a luminous intensity of the first light source is greater than a luminous intensity of the second light source.