US 12,085,803 B2
Backlight module and display apparatus
Tzeng-Ke Shiau, Hsin-Chu (TW); Shih-Yen Cheng, Hsin-Chu (TW); Jung-Wei Chang, Hsin-Chu (TW); and Chun-Wei Lee, Hsin-Chu (TW)
Assigned to Coretronic Corporation, Hsin-Chu (TW)
Filed by Coretronic Corporation, Hsin-Chu (TW)
Filed on Mar. 7, 2023, as Appl. No. 18/179,384.
Claims priority of application No. 202220521242.5 (CN), filed on Mar. 11, 2022.
Prior Publication US 2023/0288753 A1, Sep. 14, 2023
Int. Cl. G02F 1/13357 (2006.01); F21V 8/00 (2006.01); G02F 1/1335 (2006.01)
CPC G02F 1/133603 (2013.01) [G02B 6/0053 (2013.01); G02B 6/0076 (2013.01); G02F 1/133607 (2021.01); G02F 1/133615 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A backlight module, comprising:
a first light guide plate, having a first light incident surface, a first bottom surface, and a first light emitting surface, and the first bottom surface and the first light emitting surface being connected to the first light incident surface and opposite to each other;
a first light source, disposed on one side of the first light incident surface of the first light guide plate;
a diffusor, disposed on one side of the first light emitting surface of the first light guide plate;
a second light guide plate, disposed on one side of the first bottom surface of the first light guide plate, the second light guide plate having a second light incident surface, a second bottom surface, and a second light emitting surface, the second bottom surface and the second light emitting surface being connected to the second light incident surface and opposite to each other, and the second light emitting surface facing the first bottom surface;
a second light source, disposed on one side of the second light incident surface of the second light guide plate;
a viewing angle control film, disposed between the first light guide plate and the second light guide plate; and
a first prism sheet, disposed between the viewing angle control film and the first light guide plate.