Narrow-Bezel Display Edge Structure for Crack and Peeling Resistance
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Solution Overview
Problem
Existing display devices face challenges in achieving a narrow bezel design while preventing crack propagation and film lifting or peeling, which compromises structural integrity and reliability.
Innovation Solution
A novel display device structure where the substrate, panel inorganic layers, and touch inorganic layers are aligned with a mold, and first and second stop holes are formed to trap residual films, filled with a clad part, acting as crack stoppers, and a clad part is included in the non-display area to reinforce structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the bezel width is reduced to achieve a narrow bezel design, then the display area ratio is improved, but the structural integrity and reliability deteriorate due to increased susceptibility to crack propagation and film lifting
Solution Approach 1:
The patent introduces stop holes that segment the continuous inorganic layer into discrete sections. These stop holes act as crack propagation barriers by dividing the potential crack path into isolated segments, preventing cracks from spreading continuously across the entire bezel area while maintaining the narrow bezel design.
Solution Approach 2:
The patent introduces an intermediary organic layer between the inorganic layers and the substrate. This intermediary layer serves as a buffer that absorbs mechanical stress and prevents direct contact between rigid inorganic layers and the substrate, thereby reducing stress concentration and preventing film lifting at the bezel edges.
2Device complexity
If the bezel width is reduced, then the device complexity is reduced, but the resistance to crack propagation deteriorates
Solution Approach 1:
The stop holes segment the inorganic layer into isolated sections, creating discrete barriers that interrupt crack propagation paths. This segmentation approach prevents cracks from spreading continuously across the bezel while adding minimal structural complexity.
Solution Approach 2:
The stop holes are formed in advance during the manufacturing process, creating pre-positioned barriers before the device is put into service. This preliminary action ensures that crack propagation is prevented from the outset without requiring additional complex structural elements.
3Strength
If the inorganic layers are aligned with the substrate to prevent film lifting, then the bonding strength is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The stop holes are formed in advance during the manufacturing process, creating pre-positioned barriers that guide subsequent layer alignment. This preliminary action establishes reference points that simplify the alignment process and reduce the precision requirements for subsequent manufacturing steps.
Solution Approach 2:
The intermediary organic layer acts as a flexible mediator between the inorganic layers and substrate. This layer accommodates minor alignment variations through its flexible nature, reducing the stringency of alignment precision requirements while still providing effective stress buffering and bonding.
Data Source
AI summary
A display device according to one embodiment of the present specification includes a display panel including a display area including a pixel and a non-display area located around the display area, and a mold disposed on a side surface of the display panel, wherein the display panel includes a substrate, at least one panel inorganic layer on the substrate, a light-emitting part on the at least one panel inorganic layer, a touch part including at least one touch inorganic layer on the light-emitting part and a touch electrode on the at least one touch inorganic layer, and a first touch organic layer on the touch part, and the substrate, the at least one panel inorganic layer, and the first touch organic layer come into contact with the mold.