Curved Display Panel Bonding to Pre-Curved Substrate
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Solution Overview
Problem
Curved glass substrates in display devices are prone to cracking and stress concentration during the curving process, leading to display quality and mechanical strength issues, as well as uneven curvature, which affects the reliability and durability of the display panel.
Innovation Solution
A display device configuration that includes a display panel bonded to a supporting substrate with a pre-curved surface using an adhesive layer, which suppresses stress concentration and maintains the panel in a curved form, enhancing mechanical strength and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a glass substrate is thinned to enable curving, then flexibility and curved form capability are improved, but fracture strength and resistance to cracking deteriorate
Solution Approach 1:
The invention uses a composite structure consisting of a thin glass substrate (0.1-0.3mm) combined with a resin layer. The glass substrate provides the necessary flexibility for curving while the resin layer compensates for the reduced fracture strength, creating a composite material system that achieves both curved form capability and adequate mechanical strength.
Solution Approach 2:
The invention employs a thin glass substrate with thickness of 0.1 to 0.3mm, which is sufficiently thin to enable curving and forming into desired shapes while maintaining adequate structural integrity when properly supported and handled.
2Shape
If curving processing is applied to the display panel, then curved display form is achieved, but stress concentration and crack occurrence increase
Solution Approach 1:
The invention performs curving processing at an early stage during manufacturing, before the display panel is fully assembled and before cracks can occur during later handling or installation. By pre-curving the glass substrate and maintaining it in the curved state through proper support structures, the panel avoids subsequent stress concentration that would occur if curving were attempted later.
Solution Approach 2:
The invention uses a resin layer as an intermediary material between the glass substrate and the external environment. This resin layer acts as a buffer that reduces stress concentration on the glass substrate during and after curving processing, preventing crack initiation and propagation.
3Adaptability or versatility
If a thin glass substrate is used for curving, then flexibility is improved, but susceptibility to initial and delayed fracture increases
Solution Approach 1:
The invention creates a composite structure where a thin glass substrate (0.1-0.3mm) is combined with a resin layer. The thin glass provides the necessary flexibility for curving while the resin layer compensates for the reduced fracture resistance, protecting against both initial fractures during manufacturing and delayed fractures during service.
Solution Approach 2:
The resin layer serves as a cushioning element that is applied beforehand to protect the thin glass substrate from stress concentrations that would lead to fractures. This protective layer is in place during manufacturing and continues to protect the glass during installation and service, preventing both immediate and time-dependent fracture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces stress concentration, improves display quality, mechanical strength, and durability by maintaining a uniform curvature and protecting the panel from external forces, thereby enhancing the overall reliability of the display device.
Implementation Method 1
an adhesive layer, which suppresses stress concentration and maintains the panel in a curved form
Data Source
AI summary
A display device where concentration of a stress in a display panel is suppressed, to allow improvement in display quality, reliability and the like. A display device includes a display panel, an adhesive layer and a supporting substrate. The adhesive layer is provided on the display panel. The supporting substrate is made up of a member previously provided with curved surfaces. The display panel is bonded onto the curved surface of the supporting substrate by the adhesive layer. The supporting substrate supports the display panel in a curved form along the curved surface.