US 12,216,347 B2
Backlight module, display module, and display apparatus
Yong Ma, Beijing (CN); Haifeng Xu, Beijing (CN); Xiaochun Shi, Beijing (CN); Jinfeng Zhang, Beijing (CN); and Tao Liu, Beijing (CN)
Assigned to Hefei Xinsheng Optoelectronics Technology Co., Ltd., Anhui (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 18/021,185
Filed by Hefei Xinsheng Optoelectronics Technology Co., Ltd., Anhui (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Mar. 28, 2022, PCT No. PCT/CN2022/083455
§ 371(c)(1), (2) Date Feb. 14, 2023,
PCT Pub. No. WO2023/184100, PCT Pub. Date Oct. 5, 2023.
Prior Publication US 2024/0264478 A1, Aug. 8, 2024
Int. Cl. G02F 1/1333 (2006.01); F21V 8/00 (2006.01)
CPC G02F 1/133317 (2021.01) [G02B 6/0066 (2013.01); G02B 6/0088 (2013.01); G02F 2202/28 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A backlight module, comprising a back plate, a plastic frame disposed on one side of the back plate and connected with the back plate, a light source assembly located on an inner side of the plastic frame, and a reflective sheet, a light guide plate, and an optical membrane group sequentially stacked and located on the inner side of the plastic frame;
wherein the light source assembly comprises a circuit board and a light source disposed on a first side surface of the circuit board, and the light source is located at a first side edge of the light guide plate; the light guide plate comprises a first surface facing the reflective sheet and a second surface facing away from the reflective sheet;
a first rectangular annular step and a second rectangular annular step are provided on an end face of the plastic frame facing the back plate, a portion of the reflective sheet close to an outer edge of the reflective sheet is bonded to the first rectangular annular step through a first double-sided adhesive tape, and the reflective sheet is also bonded by the first double-sided adhesive tape to a portion of the first surface of the light guide plate close to a remaining side edge of the light guide plate except the first side edge; and
a portion of the second surface of the light guide plate close to the outer edge of the reflective sheet is disposed toward the second rectangular annular step, and a portion of the second surface of the light guide plate close to the first side edge is fixed on the second rectangular annular step.