US 12,253,710 B2
Backlight module and display device
Ying-Hsiang Chen, Hsin-Chu (TW); and Ping-Yen Chen, Hsin-Chu (TW)
Assigned to Coretronic Corporation, Hsin-Chu (TW)
Filed by Coretronic Corporation, Hsin-Chu (TW)
Filed on Jan. 24, 2024, as Appl. No. 18/421,833.
Claims priority of application No. 202320382529.9 (CN), filed on Mar. 3, 2023.
Prior Publication US 2024/0295686 A1, Sep. 5, 2024
Int. Cl. F21V 8/00 (2006.01); G02F 1/1335 (2006.01); G02F 1/13357 (2006.01)
CPC G02B 6/0053 (2013.01) [G02F 1/133615 (2013.01); G02F 1/133626 (2021.01)] 13 Claims
OG exemplary drawing
 
1. A backlight module, comprising a first light emitting unit, a first light guide plate, a second light emitting unit, a second light guide plate, a light control film, a first prism sheet, a second prism sheet and a third prism sheet, wherein:
the first light emitting unit is disposed on a first side surface of the first light guide plate;
the second light emitting unit is disposed on a second side surface of the second light guide plate;
the light control film is disposed between the first light guide plate and the second light guide plate, the light control film has a plurality of light-shielding microstructures arranged along a first direction and extending along a second direction, and the first direction is perpendicular to the second direction;
the second prism sheet is located between the light control film and the second light guide plate, and has a plurality of second prism structures on a side away from the second light guide plate;
the first prism sheet is located on a side of the first light guide plate away from the light control film or disposed between the light control film and the second prism sheet, and has a plurality of first prism structures on the side away from the second light guide plate; and
the third prism sheet is disposed between the second prism sheet and the second light guide plate, and has a plurality of third prism structures on a side facing the second light guide plate.