US 12,449,686 B2
Backlight module, display apparatus, anti-peep display apparatus and driving method therefor
Yongle Qi, Beijing (CN); Rui Han, Beijing (CN); Dong Cui, Beijing (CN); Jie Yu, Beijing (CN); Daekeun Yoon, Beijing (CN); Qing Ma, Beijing (CN); Zhipeng Zhang, Beijing (CN); Weining Chi, Beijing (CN); Shouyang Leng, Beijing (CN); Wenyang Li, Beijing (CN); Yue Zhai, Beijing (CN); Fengping Wang, Beijing (CN); and Yue Yang, Beijing (CN)
Assigned to Beijing BOE Display Technology Co., Ltd., Beijing (CN); and Beijing BOE Technology Development Co., Ltd., Beijing (CN)
Appl. No. 18/681,615
Filed by BEIJING BOE DISPLAY TECHNOLOGY CO., LTD., Beijing (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Jan. 19, 2023, PCT No. PCT/CN2023/073136
§ 371(c)(1), (2) Date Feb. 6, 2024,
PCT Pub. No. WO2024/152298, PCT Pub. Date Jul. 25, 2024.
Prior Publication US 2025/0138351 A1, May 1, 2025
Int. Cl. G02F 1/13 (2006.01); F21V 8/00 (2006.01); G02F 1/1335 (2006.01); G02F 1/13357 (2006.01)
CPC G02F 1/1323 (2013.01) [G02B 6/0036 (2013.01); G02B 6/0055 (2013.01); G02F 1/133524 (2013.01); G02F 1/133604 (2013.01); G02F 1/133605 (2013.01); G02F 1/133607 (2021.01); G02F 1/133612 (2021.01)] 18 Claims
OG exemplary drawing
 
1. A backlight module, comprising:
a light guide plate having a bottom surface and a light exit surface that are disposed oppositely, and a light incident surface connecting the bottom surface and the light exit surface;
a substrate located on a side of the bottom surface away from the light exit surface;
a plurality of first light-emitting devices located on a side of the substrate proximate to the bottom surface; the substrate being configured to control operating states of the plurality of first light-emitting devices;
a plurality of second light-emitting devices disposed opposite to the light incident surface; and
a prism sheet located on a side of the light guide plate away from the substrate; wherein
the plurality of first light-emitting devices are configured to emit first light, so that the first light passes through the light guide plate and the prism sheet to become light of a first viewing angle; and
the prism sheet is configured to cooperate with the light guide plate to modulate second light emitted by the plurality of second light-emitting devices into light of a second viewing angle, and the first viewing angle is larger than the second viewing angle; and
the substrate includes a plurality of driving circuits; and a driving circuit is electrically connected to at least one first light-emitting device; the substrate further includes a plurality of scan signal lines, a plurality of data signal lines and a plurality of second voltage lines;
the driving circuit includes a first transistor, a second transistor and a storage capacitor; wherein a control electrode of the first transistor is electrically connected to a scan signal line, a first electrode of the first transistor is electrically connected to a data signal line, and a second electrode of the first transistor is electrically connected to a first electrode of the storage capacitor; a control electrode of the second transistor is electrically connected to the first electrode of the storage capacitor, a first electrode of the second transistor is electrically connected to a first electrode of a first light-emitting device, and a second electrode of the second transistor is grounded; a second electrode of the first light-emitting device is electrically connected to a second voltage line; and a second electrode of the storage capacitor is grounded.