Curved Display Backplane Grooves for Lamination Bubble Control
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Solution Overview
Problem
Bubbles are prone to appear at the Gaussian curved surface of existing four-curved screens due to peeling between the display panel and the cover plate after lamination, caused by excessive compression and rebound forces.
Innovation Solution
A display module with a backplane featuring a first groove on its corner portions to release bending stress, reducing rebound forces and peeling risks, comprising a planar and curved region with edge and corner portions, and including a first sub-backplane with the groove penetrating through it.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the display panel and cover plate are laminated together to form a four-curved screen, then the screen ratio and display area are increased, but bubbles appear at the Gaussian curved surface due to excessive compression and rebound forces
Solution Approach 1:
The backplane is divided into multiple sub-backplanes (first sub-backplane and second sub-backplane) connected by grooves. This segmentation allows the structure to better accommodate curvature changes at Gaussian surfaces while reducing excessive compression and rebound forces that cause bubble formation during lamination.
Solution Approach 2:
The grooves are specifically positioned at the corner portions of the backplane where Gaussian curved surfaces are formed. This local modification reduces rebound forces at specific locations without affecting the overall structural integrity or the display area of the screen.
2Strength
If the backplane structure is made rigid to provide strong support, then structural integrity is improved, but rebound forces increase causing peeling and bubble formation
Solution Approach 1:
The backplane is segmented into multiple sub-backplanes connected by grooves, which allows the structure to maintain overall rigidity while reducing localized rebound forces. The grooves act as stress relief features that prevent excessive compression during lamination.
Solution Approach 2:
The grooves modify the mechanical parameters of the backplane by creating controlled weaknesses that reduce rebound forces at Gaussian surfaces while maintaining overall structural integrity. This changes the stress distribution parameters without compromising the support function.
Data Source
AI summary
A display module and a display device are provided, the display module includes a planar region and a curved region located outside the planar region. A backplane of the display module includes a planar portion disposed corresponding to the planar region and a curved portion disposed corresponding to the curved region. A first groove is disposed at a corner portion of the curved portion. The backplane further includes a first sub-backplane and a second sub-backplane. The first groove penetrates through the first sub-backplane to alleviate the problem that bubbles are easily appearing at the Gaussian curved surface of the existing four-curved screen after laminating.