Rollable Display Panel Glass Structure for Bendability and Impact Resistance
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Solution Overview
Problem
Conventional slidable-scrollable display devices face a contradiction between impact resistance and resilience force due to differences in Young's modulus between cover glass and film materials, leading to peeling or separation of film layers when the cover window is bent.
Innovation Solution
Incorporating structural holes in the glass layer of the display panel, specifically designed with varying thicknesses and arrangements to reduce resilience force while maintaining impact resistance, using glass with an elastic modulus of 50 GPa-100 GPa and thicknesses ranging from 50 μm to 200 μm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the glass layer is made thicker to improve impact resistance, then impact resistance is improved, but the device cannot be bent into rolled-up state
Solution Approach 1:
The glass layer is divided into multiple sections along the bending direction, with through holes formed between these sections. This segmentation allows the glass layer to flex during bending while maintaining structural integrity in non-bending areas, resolving the contradiction between thickness for impact resistance and thinness for bendability.
Solution Approach 2:
Through holes are introduced into the glass layer to create a porous structure. These holes reduce the overall stiffness of the glass layer, enabling it to be bent into rolled-up states while maintaining sufficient impact resistance in the flat display region. The porous structure allows the glass to flex without breaking.
2Stability of the object's composition
If structural holes are added to reduce resilience force, then film layer stability is improved, but glass layer strength is reduced
Solution Approach 1:
Through holes are strategically positioned only in specific regions where they serve to reduce resilience force and prevent film layer peeling, while other regions of the glass layer maintain full structural integrity. This localized modification allows the glass to remain strong where needed while being compliant where required.
Solution Approach 2:
The introduction of through holes creates a controlled porous structure that reduces the glass layer's resilience force. This porous design allows the glass to flex without breaking, preventing film layer separation while maintaining sufficient overall strength through proper hole distribution and sizing.
Data Source
AI summary
A display panel is provided, including a flat display region, and a fixed region and a sliding-scrolling region on two sides of the flat display region in a first direction, the fixed region is adhered with a middle frame, the flat display region is configured to display images, the sliding-scrolling region is configured to form a rolled-up state and an extended state by sliding-scrolling, the sliding-scrolling region displays the image together with the flat display region in the extended state, on a plane perpendicular to the display panel, the display panel at least includes a display substrate, an adhesive layer disposed on the display substrate, and a cover plate layer on a side of the adhesive layer away from the display substrate, the cover plate layer at least includes a glass layer, the glass layer of at least one of the fixed region and the sliding-scrolling region has a structural hole.