US 11,991,894 B2
Flexible display device and method for preparing the same
Penghao Gu, Beijing (CN); Chunyan Xie, Beijing (CN); and Lingzhi Qian, Beijing (CN)
Assigned to BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 17/419,037
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Dec. 29, 2020, PCT No. PCT/CN2020/140850
§ 371(c)(1), (2) Date Jun. 28, 2021,
PCT Pub. No. WO2021/136270, PCT Pub. Date Jul. 8, 2021.
Claims priority of application No. 202010013479.8 (CN), filed on Jan. 3, 2020.
Prior Publication US 2022/0376205 A1, Nov. 24, 2022
Int. Cl. H10K 50/84 (2023.01); H05K 1/02 (2006.01); H10K 50/842 (2023.01); H10K 71/00 (2023.01); H10K 77/10 (2023.01); H10K 102/00 (2023.01)
CPC H10K 50/8426 (2023.02) [H05K 1/028 (2013.01); H10K 50/841 (2023.02); H10K 71/00 (2023.02); H10K 77/111 (2023.02); H10K 2102/311 (2023.02)] 10 Claims
OG exemplary drawing
 
1. A flexible display device, comprising a flexible display panel and a back supporting film bound to a back surface of the flexible display panel, wherein the flexible display panel comprises a bonding region and a non-bonding region, wherein
the back supporting film comprises: a layer of a first base material bound to the flexible display panel in at least a portion of the bonding region, and a layer of a second base material bound to the flexible display panel in at least a portion of the non-bonding region,
wherein the layer of the first base material is bound to the flexible display panel via a layer of a transparent first adhesive, the layer of the first base material has a transmittance of 85% or more and a haze of 5% or less, and the layer of the first adhesive layer is a layer of a UV cured adhesive; and
wherein the layer of the second base material is bound to the flexible display panel via a layer of a second adhesive, wherein the second base material is different from the first base material, and the second adhesive is different from the first adhesive,
wherein the first adhesive has an elastic modulus greater than that of the second adhesive, the first adhesive has an elastic modulus of 150-500 kPa, and the second adhesive has an elastic modulus of 1-150 kPa.