Segmented Main Circuit Board for Foldable Display Stress Reduction

The main circuit board is divided into multiple segments (first main segment, second main segment, and first sub-segment) that can be independently bent along different bending lines. This segmentation allows each segment to accommodate the curved shape of the display panel while distributing the mechanical stress, preventing distortion of the flexible printed circuit board and protecting the circuits from damage.

The main circuit board is designed with bending lines that allow specific segments to dynamically adjust their position and curvature. The first main segment can be bent inwardly along the first bending line, and the second main segment can be bent outwardly along the second bending line, enabling the structure to adapt to the curved display panel while maintaining overall stability and reducing harmful tensile forces on the flexible printed circuit board.

Different segments of the main circuit board are assigned different bending characteristics and directions. The first main segment is bent inwardly along the first bending line, while the second main segment is bent outwardly along the second bending line. This local differentiation of bending behavior distributes the stress throughout the structure rather than concentrating it at single points, preventing potential damage while achieving the desired curved form.