Flexible Display Substrate Bezel Bending Resistance
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Solution Overview
Problem
Flexible display devices with inorganic film layers in the bezel portion are prone to breakage when bent, leading to poor ductility and potential metal wire breakage, affecting display quality.
Innovation Solution
A display substrate with a metal wire layer directly formed on a flexible base or an organic buffer layer, and an inorganic insulating layer provided in adjacent regions, enhancing bending resistance by preventing breakage of the metal wire layer during bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an inorganic film layer is used for the metal wire of the bezel portion, then the insulating performance is improved, but the ductility deteriorates causing the metal wire to break when bent
Solution Approach 1:
The patent applies different material properties to different regions: the bezel portion uses an organic insulating layer for flexibility and ductility, while the display region uses an inorganic insulating layer for superior insulating performance. This local differentiation resolves the contradiction by matching material properties to functional requirements in each region.
Solution Approach 2:
The patent employs a composite structure combining organic and inorganic insulating layers in different spatial regions. The organic insulating layer (first insulating layer) provides flexibility in the bezel region, while the inorganic insulating layer (second insulating layer) provides insulation in the display region, creating a composite solution that satisfies both ductility and insulating performance requirements.
2Reliability
If the metal wire layer is formed on an inorganic insulating layer in the bezel region, then the insulating performance is improved, but the manufacturing complexity increases due to additional layers
Solution Approach 1:
The patent applies different material properties to different regions: the bezel portion uses an organic insulating layer for flexibility and ductility, while the display region uses an inorganic insulating layer for superior insulating performance. This local differentiation resolves the contradiction by matching material properties to functional requirements in each region.
Solution Approach 2:
The patent extracts the inorganic insulating layer from the bezel region where it is not needed, retaining it only in the display region where insulating performance is critical. This selective removal simplifies the structure in the bezel region while maintaining necessary insulation in the display region, reducing overall manufacturing complexity.
Data Source
AI summary
The present disclosure provides a display substrate, comprising: a bending resistant region; the region comprises a base and a metal wire layer, wherein the metal wire layer is directly formed on the base, or the region further comprises an organic buffer layer located between the base and the metal wire layer, and the metal wire layer is directly formed on the organic buffer layer. The present disclosure provides a method for manufacturing the display substrate above-described. The present disclosure further provides a display device, comprising the display substrate above-described. The present disclosure further provides a method for manufacturing the display device, comprising the method for manufacturing the display substrate above-described. The present disclosure forms a bending resistant structure in a predetermined bending resistant region on the bezel portions of the display substrate, which can enhance the bend resistance thereof and improve the quality of the flexible display.