US 11,733,564 B2
Curved backlight module and display device
Yu Zhang, Beijing (CN); Huiyan Li, Beijing (CN); Lijin Zhao, Beijing (CN); Shixin Geng, Beijing (CN); and Bochang Wang, Beijing (CN)
Assigned to Beijing BOE Display Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/761,514
Filed by Beijing BOE Display Technology Co., Ltd., Beijing (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed May 12, 2021, PCT No. PCT/CN2021/093283
§ 371(c)(1), (2) Date Mar. 17, 2022,
PCT Pub. No. WO2021/254035, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 202010557239.4 (CN), filed on Jun. 18, 2020.
Prior Publication US 2022/0365395 A1, Nov. 17, 2022
Int. Cl. G02F 1/00 (2006.01); G02F 1/13357 (2006.01)
CPC G02F 1/133608 (2013.01) [G02F 1/133603 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A curved backlight module, comprising:
an optical film and a lamp board which are oppositely arranged, wherein a distance between the optical film and the lamp board refers to an optical cavity height;
wherein the lamp board has a plurality of lamp bars which extend in a first direction and are arranged in a second direction, a plurality of lamp beads distributed in an array are provided on each of the plurality of lamp bars, and distribution parameters of the plurality of lamp beads on each of the plurality of lamp bars are identical;
on each of the plurality of lamp bars, a first distance is provided between two adjacent lamp beads in the first direction, and a second distance is provided between two adjacent lamp beads in the second direction; and
the first distance and the second distance are adjusted, to enable a ratio of the optical cavity height to the first distance and a ratio of the optical cavity height to the second distance to be both greater than a first preset value, and a difference between the ratio of the optical cavity height to the first distance and the ratio of the optical cavity height to the second distance to be less than a second preset value; and further enable uniformity of light-emitting brightness of the curved backlight module to be not less than 75%.