Foldable Display Support Plate With Slot Layout for Uniform Bending Stress
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Solution Overview
Problem
The non-uniform stress distribution caused by hollowed-out structures in support plates of foldable display screens leads to visual marks resembling cracks, affecting display performance.
Innovation Solution
A support plate design with through grooves composed of first and second strip-shaped slots arranged in parallel, providing uniform stress distribution and structural continuity, filled with a flexible medium to enhance structural integrity and reduce stress concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If hollowed-out structures are provided in the bending area of the support plate to provide deformation space and reduce internal stress, then bending performance is improved, but structural continuity and integrity are destroyed, leading to non-uniform stress distribution and generation of attachment marks
Solution Approach 1:
The hollowed-out structure is segmented into multiple through grooves arranged in an array, where each through groove consists of multiple strip-shaped slots. This segmentation allows the structure to provide deformation space while maintaining overall continuity through the coordinated arrangement of multiple smaller elements rather than a single large hollowed area
Solution Approach 2:
The support plate is designed with different structural characteristics in different regions: the through grooves with strip-shaped slots are specifically positioned in the bending area to provide local flexibility and stress relief, while the rest of the support plate maintains structural integrity and continuity. This local differentiation allows the structure to be flexible where needed while remaining stable overall
2Stress or pressure
If hollowed-out structures are provided to reduce internal stress during bending, then stress reduction is achieved, but non-uniform stress distribution occurs, causing attachment marks on the display screen
Solution Approach 1:
The through grooves are designed with asymmetric characteristics: the first strip-shaped slot extends through the first board to a specific depth, while the second strip-shaped slots extend to the bottom of the first strip-shaped slot but do not fully penetrate the second board. This asymmetric design creates a gradient stress distribution that reduces peak stresses while maintaining uniformity across the bending area
Solution Approach 2:
The solution addresses stress distribution by introducing a depth dimension through the multi-level strip-shaped slot configuration. The slots are arranged at different depths within the support plate thickness, creating a three-dimensional stress relief structure that distributes stress more uniformly throughout the material volume rather than just at the surface
Data Source
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AI summary
Provided are a support plate, a display screen, and an electronic device. The support plate (100) includes a first board (110) and a second board (120). The first board (110) and the second board (120) are arranged back to back, and the first board (110) is configured to be attached to a display panel. The support plate (100) includes a bending area (31), and the support plate (100) is configured to bend in the bending area (31) along a preset axial line L. First strip-shaped slots (211) are formed on the first board (110), and second strip-shaped slots (212) distributed in an array at intervals along the axial line L are formed on the second board (120). The first strip-shaped slots (211) are continuously provided along the axial line L and extend through the first board (110) to form a unified edge structure. The edge structure provides a uniform stress distribution for the support plate (100) during bending of the support plate, such that a mark is not generated on a display screen on an attachment surface between the support plate (100) and the display panel due to a non-uniform stress distribution, thereby improving display performance of the display screen. In addition, the second strip-shaped slots (212) distributed in an array at intervals along the axial line L provide a structural continuity for the support plate (100) on the second board (120), thereby ensuring a structural strength of the support plate (100).