US 12,219,866 B2
Flexible OLED display device
Yonghong Zhou, Beijing (CN); Shiming Shi, Beijing (CN); Meiling Gao, Beijing (CN); Zhao Li, Beijing (CN); and Liming Dong, Beijing (CN)
Assigned to BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 17/422,608
Filed by BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Jan. 4, 2021, PCT No. PCT/CN2021/070090
§ 371(c)(1), (2) Date Jul. 13, 2021,
PCT Pub. No. WO2021/147654, PCT Pub. Date Jul. 29, 2021.
Claims priority of application No. 202010075992.X (CN), filed on Jan. 22, 2020.
Prior Publication US 2022/0344602 A1, Oct. 27, 2022
Int. Cl. H01L 51/00 (2006.01); H01L 51/56 (2006.01); H10K 71/00 (2023.01); H10K 77/10 (2023.01); H10K 102/00 (2023.01)
CPC H10K 77/111 (2023.02) [H10K 71/00 (2023.02); H10K 2102/311 (2023.02); H10K 2102/351 (2023.02)] 13 Claims
OG exemplary drawing
 
1. A flexible OLED display device, comprising:
a flexible display panel comprising an active area, an extension portion and a bending portion connecting the active area and the extension portion;
a support member positioned between the active area and the extension portion; and,
a first laminated structure disposed between an upper surface of the support member and a lower surface of the active area, wherein the first laminated structure comprises a first film adhesive, a first film, a second film adhesive and a second film,
wherein the active area, the support member and the extension portion are stacked, and a first distance is set between the support member and the bending portion in an extending direction parallel to the extension portion,
wherein the bending portion is substantially of a semicircular shape, and an inner radius of the semicircular shape is equal to a sum of a half of a thickness of the support member and a thickness of the first laminated structure,
wherein the first distance is determined by the following relationship:
x≥(Tbond2+Toled2+Tsupport member2)1/2+Δ;
wherein x is the first distance; Tbond is a bond tolerance between the flexible display panel and the support member in the extending direction parallel to the extension portion; Toled is a dimensional tolerance of the flexible display panel in the extending direction parallel to the extension portion, and Tsupport member is a dimensional tolerance of the support member in the extending direction parallel to the extension portion; Δ is an amount of misalignment of the support member relative to the flexible display panel in the extending direction parallel to the extension portion when the flexible display panel is folded,
wherin Δ≈π(1/2*toled+tfirst film adhesive+tfirst film+tsecond film adhesive1/2*tsecond film)*K,
where toled represents a thickness of the flexible display panel, tfirst film adhesive represents a thickness of the first film adhesive, tsecond film adhesive represents a thickness of the second film adhesive, tfirst film represents a thickness of the first film, tsecond film represents a thickness of the second film, K is a coefficient which is 1˜2.5.