Foldable Display Cover Plate Structure for Bend-Impact Balance
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Solution Overview
Problem
Existing ultra-thin flexible glass used in folding display screens has weak impact strength and bending performance, making it expensive and difficult to balance both properties simultaneously.
Innovation Solution
A cover plate design incorporating a glass substrate in non-bending areas and an optical resin coating layer in bending areas, with flexible film materials for enhanced impact strength and bending performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If ultra-thin flexible glass is used to ensure good bending performance, then bending performance is improved, but impact strength becomes extremely weak
Solution Approach 1:
The cover plate is divided into bending areas and non-bending areas. The bending areas use ultra-thin flexible glass to ensure good bending performance, while the non-bending areas use thicker glass substrate to provide high impact strength. This segmentation allows different regions to have different thickness requirements, resolving the contradiction between bending performance and impact strength.
Solution Approach 2:
Different regions of the cover plate are assigned different material properties based on their functional requirements. The bending areas have lower thickness for flexibility, while the non-bending areas have higher thickness for impact resistance. This local differentiation of material properties allows the cover plate to simultaneously achieve both bending performance and impact strength.
2Strength
If thicker glass is used to improve impact strength, then impact strength is improved, but bending performance deteriorates
Solution Approach 1:
The cover plate is segmented into bending areas and non-bending areas with different thickness requirements. The bending areas use thinner ultra-thin flexible glass to maintain flexibility, while the non-bending areas use thicker glass substrate to provide impact strength. This segmentation prevents the entire cover plate from needing to be thick, thus preserving bending performance while improving impact strength where needed.
Solution Approach 2:
The cover plate employs local quality differentiation where thicker glass is applied only to non-bending areas that require impact strength, while bending areas use thinner material for flexibility. This localized application of thicker material improves impact strength without compromising the overall bending performance of the cover plate.
3Length of stationary object
If ultra-thin flexible glass is used to achieve thinness, then thickness is reduced, but manufacturing cost increases significantly
Solution Approach 1:
The cover plate is segmented into bending areas and non-bending areas with different thickness requirements. The bending areas use expensive ultra-thin flexible glass to achieve thinness and flexibility, while the non-bending areas use cheaper thicker glass substrate. This segmentation reduces the overall manufacturing cost by using expensive material only where necessary for functionality.
Solution Approach 2:
The cover plate applies local quality differentiation where ultra-thin flexible glass is used only in bending areas where thinness is critical for flexibility, while non-bending areas use thicker, more cost-effective glass. This localized application minimizes the use of expensive ultra-thin glass, thereby reducing manufacturing cost while maintaining the required thinness in functional areas.
Data Source
AI summary
The present disclosure relates to a cover plate, including a cover plate body including a bending area and non-bending areas located at two sides of the bending area, where each of the non-bending areas includes a glass substrate and the bending area includes a first optical resin coating layer formed by a coating process using an optical resin material. The present disclosure also relates to a display module and a display device. The cover plate body includes at least two structures of the first optical resin coating layer and the glass substrate, where the first optical resin coating layer with a strong bending performance is provided in the bending area and the glass substrate with a strong impact strength is provided in the non-bending areas so as to solve a problem that impact strength and bending performance of the cover plate only made of the glass substrate cannot be balanced.