US 11,733,433 B2
Protective film for substrate, manufacturing method thereof, substrate and manufacturing method of display panel
Yu Zhang, Beijing (CN); Hao Yan, Beijing (CN); Haitao Yi, Beijing (CN); Zhenghong Wang, Beijing (CN); and Zhiliang Jiang, Beijing (CN)
Assigned to 1) CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., Sichuan (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 16/333,818
Filed by CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., Sichuan (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Sep. 7, 2018, PCT No. PCT/CN2018/104604
§ 371(c)(1), (2) Date Mar. 15, 2019,
PCT Pub. No. WO2019/148845, PCT Pub. Date Aug. 8, 2019.
Claims priority of application No. 201810110481.X (CN), filed on Feb. 5, 2018.
Prior Publication US 2021/0341650 A1, Nov. 4, 2021
Int. Cl. G02B 1/14 (2015.01); G09F 9/30 (2006.01); B32B 3/30 (2006.01); B32B 27/08 (2006.01)
CPC G02B 1/14 (2015.01) [B32B 3/30 (2013.01); B32B 27/08 (2013.01); G09F 9/301 (2013.01); B32B 2457/20 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A protective film for a substrate, the substrate comprising a plurality of panel regions, wherein the substrate is to be cut into a plurality of independent small-sized display panels which correspond to the plurality of panel regions, respectively, each of the panel regions having a first region, the first region corresponds to a bending region of each of the display panels, wherein
the protective film comprises an entire film layer, and a hollow portion is disposed in the entire film layer, the size of the entire film layer matches the size of the substrate, and the hollow portion is for exposing the first region in each of the panel regions when the protective film is attached to the substrate,
wherein the plurality of the panel regions are arranged in a matrix, each row and each column in the matrix includes a plurality of panel regions, and the first region in the panel regions arranged in the same row or in the same column constitute a continuous strip region;
the hollow portions are arranged in a matrix, and each of the hollow portions has a strip shape, and when the protective film is attached to the substrate, the hollow portions expose the strip region in a one-to-one correspondence, and a portion of the protective film between two adjacent hollow portions forms a one-piece structure configured to cover the plurality of panel regions arranged in a direction parallel to the hollow portion.