US 12,443,237 B2
Bendable film structure and manufacturing method thereof, display panel, and display device
Chuanfu Xiao, Shanghai (CN); and Jian Jin, Shanghai (CN)
Assigned to Shanghai Tianma Microelectronics Co., Ltd., Shanghai (CN)
Filed by Shanghai Tianma Microelectronics Co., Ltd., Shanghai (CN)
Filed on Jun. 14, 2023, as Appl. No. 18/209,660.
Claims priority of application No. 202211739408.1 (CN), filed on Dec. 30, 2022.
Prior Publication US 2023/0324959 A1, Oct. 12, 2023
Int. Cl. G06F 1/16 (2006.01)
CPC G06F 1/1652 (2013.01) [G06F 1/1601 (2013.01); G06F 1/1639 (2013.01); G06F 1/1641 (2013.01); G06F 2200/16 (2013.01)] 28 Claims
OG exemplary drawing
 
1. A bendable film structure, comprising at least one bendable region, a flexible substrate, and a filler layer, wherein
in the at least one bendable region, a plurality of first recesses are configured on a first side of the flexible substrate, and the filler layer comprises a first filler layer that fills a respective first recess of the plurality of first recesses; and/or a plurality of second recesses are configured on a second side of the flexible substrate, and the filler layer further comprises a second filler layer that fills a respective second recess of the plurality of second recesses,
wherein the first side is an inner side of the flexible substrate when the bendable film structure is bent, and the second side is opposite to the first side, and at least one of the first filler layer or the second filler layer has an elasticity greater than the flexible substrate;
wherein in the bendable region, the flexible substrate comprises a flat region, the flat region is located between two adjacent first recesses and/or between two adjacent second recesses;
wherein a surface of the flat region comprises a plurality of first sub-recesses;
wherein among the plurality of first sub-recesses, the plurality of first recesses, and the plurality of second recesses, a projected area of a first sub-recess on the surface of the flat region located between the two adjacent first recesses on the flexible substrate is smaller than a projected area of a first recess on the flexible substrate, the projected area of the first sub-recess on the surface of the flat region located between the two adjacent second recesses on the flexible substrate is smaller than a projected area of a second recess on the flexible substrate; and/or
a depth of the first sub-recess on the surface of the flat region located between the two adjacent first recesses in a direction perpendicular to the flexible substrate is less than a depth of the first recess in the direction perpendicular to the flexible substrate, the depth of the first sub-recess on the surface of the flat region located between the two adjacent second recesses in the direction perpendicular to the flexible substrate is less than a depth of the second recess in the direction perpendicular to the flexible substrate; and
wherein orthographic projections of the plurality of first sub-recesses on the surface of the flat region located between the two adjacent first recesses on the flexible substrate overlap an orthographic projection of a corresponding second recess on the flexible substrate; and/or
the orthographic projections of the plurality of first sub-recesses on the surface of the flat region located between the two adjacent second recesses on the flexible substrate overlap an orthographic projection of a corresponding first recess on the flexible substrate.