Deformable Display Cover Window with Impact Absorption and Optical Compensation
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Solution Overview
Problem
Conventional display devices lack a cover window that is both flexible enough to accommodate deformable displays and provides sufficient impact resistance and protection against external damage.
Innovation Solution
A cover window design comprising a first window member with an impact absorption layer and a second window member featuring an optical compensation layer, film layer, and functional coating layers, which are strategically positioned to enhance bending characteristics and resistance against external impacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional transparent cover window is used, then protection against external impact and damage is provided, but bending flexibility is insufficient for deformable display devices
Solution Approach 1:
The cover window is divided into multiple functional layers: a first window member (rigid protective layer) and a second window member (flexible layer with adhesive). This segmentation allows each layer to perform its specialized function - the first layer provides impact resistance while the second layer provides bending flexibility, resolving the contradiction between strength and adaptability
Solution Approach 2:
The cover window uses a composite structure combining a rigid first window member (such as glass or hard coating) with a flexible second window member (such as polymer film with adhesive). This composite material approach enables the cover window to simultaneously achieve high impact resistance from the rigid layer and sufficient bending flexibility from the flexible layer
2Adaptability or versatility
If the cover window is made more flexible to accommodate deformable displays, then bending characteristics improve, but resistance against external impacts and damage decreases
Solution Approach 1:
By separating the cover window into distinct functional layers - a rigid first window member for impact protection and a flexible second window member for bending adaptability - the design allows each layer to optimize its specific function without compromising the other, thus resolving the trade-off between flexibility and strength
Solution Approach 2:
The second window member uses flexible polymer films with adhesive properties that can bend with the deformable display while maintaining structural integrity. This flexible film layer enables the cover window to adapt to bending without requiring the entire structure to be flexible, preserving impact resistance in the rigid first layer
Data Source
AI summary
A display device includes a display panel and a cover window disposed on the display panel. The cover window includes a first window member and a second window member. The first window member includes an impact absorption layer. The second window member includes an optical compensation layer and a film layer disposed on the optical compensation layer. The second window member further includes a coating portion disposed on the film layer or a third functional coating layer disposed on the film layer. The first window member is disposed between the display panel and the second window member, or the second window member is disposed between the display panel and the first window member.