Flexible Display Panel With Bent Border to Prevent Wiring Cracks
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Solution Overview
Problem
The increasing demand for high image quality and larger display areas in display apparatuses leads to a larger non-display region, reducing the visible display area and making it challenging to reduce the size of circuits and wirings without causing cracking when the panel is bent.
Innovation Solution
A flexible display panel design with a bent non-display region opposite to the display region, encapsulated by protective films to minimize the visible border and prevent cracking, featuring a flexible panel with a barrier layer, encapsulation member, and symmetrical protective films to manage bending stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the non-display region area is increased to accommodate more circuits and wirings, then the image quality and functionality are improved, but the visible display area percentage is reduced
Solution Approach 1:
The non-display region is bent to form a second plane that is angled relative to the display region's first plane. This dimensional change allows the non-display region to occupy three-dimensional space rather than competing for two-dimensional visible area, thereby accommodating necessary circuits and wirings while maintaining a high visible display area percentage when viewed from the front direction.
Solution Approach 2:
The non-display region is bent along a curved path with a specific curvature radius to form a folded structure. This curvature enables the non-display region to be positioned behind or beside the display region, allowing circuits and wirings to be routed through the bent portion without interfering with the visible display area, thus resolving the contradiction between functionality and visual appearance.
2Area of stationary object
If the flexible display panel is bent to reduce the visible non-display area, then the visible display area is enhanced, but the wirings may crack due to bending stress
Solution Approach 1:
Protective films are applied to the flexible panel before the bending operation. These protective films are pre-installed on both the display region and non-display region, providing a protective barrier that prevents wirings from cracking when the non-display region is subsequently bent to reduce the visible non-display area.
Solution Approach 2:
The flexible encapsulation member and protective films are positioned in advance to encapsulate and protect the wirings in the non-display region before bending occurs. This beforehand cushioning absorbs and distributes the bending stress, preventing concentration of stress that would cause wiring cracks while still allowing the non-display region to be bent for aesthetic purposes.
3Reliability
If the number of circuits and wirings is increased to meet high image quality demands, then the image quality is improved, but the non-display region area increases reducing the display region percentage
Solution Approach 1:
By bending the non-display region to form a second plane at an angle to the display region, the patent creates additional spatial capacity for circuits and wirings without increasing the two-dimensional footprint visible to the user. This allows high image quality to be achieved with numerous circuits while maintaining a high display region percentage in the visible area.
Solution Approach 2:
The flexible panel and flexible encapsulation member allow the non-display region to be bent into a three-dimensional configuration. This flexibility enables dense routing of circuits and wirings within the bent non-display region, accommodating the increased component count needed for high image quality without proportionally increasing the visible non-display area.
Data Source
AI summary
A flexible display panel and a display apparatus including the flexible display panel are disclosed. The flexible display panel includes an encapsulated panel, a first protective film on one side of the encapsulated panel, and a second protective film on another side of the encapsulated panel. The encapsulated panel includes a flexible panel and a flexible encapsulation member on the flexible panel. The flexible panel includes a first region on a first plane and that includes a display region, and a second region on a second plane that is bent with respect to the first plane and that includes a non-display region. The flexible encapsulation member encapsulates the display region. The display apparatus also includes a support unit for maintaining a shape of the flexible panel.