Flexible Display Crack Detection Line and Blocking Layers
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Solution Overview
Problem
Flexible display devices are prone to cracks during manufacturing and usage, leading to defects such as incorrect driving or moisture penetration, which can result in dark spots due to stress and bending.
Innovation Solution
A display device with a substrate having a semiconductor chip, a display region, and a peripheral region, featuring a multi-layer crack detection line comprising a reflective metal layer, a transparent conductive layer, and a chemical-resistant metal layer, along with blocking layers to detect and prevent cracks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device is made flexible to improve portability, then portability is improved, but cracks occur during manufacturing and usage
Solution Approach 1:
The patent applies preliminary action by incorporating blocking layers and crack detection lines during the manufacturing process to prevent and detect cracks before they affect display functionality. The blocking layers are formed in advance at critical locations to intercept crack propagation, and the crack detection lines are pre-positioned to identify cracks early, enabling preventive maintenance before reliability is compromised.
Solution Approach 2:
The patent uses blocking layers as intermediary structures positioned between the flexible display panel and external stress sources. These blocking layers act as mediators that absorb and distribute mechanical stress, preventing direct transmission of cracks to the display panel while maintaining flexibility. The crack detection lines serve as intermediary indicators that provide early warning signals.
2Adaptability or versatility
If the display panel is bent or folded to achieve flexible characteristics, then portability is improved, but cracks propagate causing display defects
Solution Approach 1:
The patent implements preliminary action by pre-positioning blocking layers and crack detection lines during manufacturing before the display device is deployed. The blocking layers are formed at critical stress points to prevent crack propagation during future bending or folding operations, and the crack detection lines are pre-installed to identify any cracks that do occur, ensuring display quality is maintained or defects are detected early.
Solution Approach 2:
The blocking layers function as intermediary protective structures that intervene between mechanical stress and the display panel during bending or folding. These layers absorb and redistribute stress forces, preventing direct crack formation and propagation that would compromise display quality. The crack detection lines serve as intermediary monitoring elements.
3Strength
If cracks occur in the display panel, then structural integrity is compromised, but moisture penetration causes additional defects
Solution Approach 1:
The patent applies preliminary action by incorporating blocking layers during manufacturing that serve as preventive barriers against moisture penetration. These blocking layers are positioned to intercept moisture before it can enter through potential cracks or defects, preventing moisture-related damage even when structural integrity is compromised by cracks.
Solution Approach 2:
The blocking layers act as intermediary protective barriers between the external environment (moisture) and the display panel interior. These layers intercept and block moisture penetration through cracks or defects, preventing harmful effects such as corrosion or short circuits while maintaining the primary function of the display panel.
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 crack detection line effectively identifies and mitigates cracks, reducing defects and ensuring proper functionality of the display device, even under stress and bending conditions.
Implementation Method 1
The first metal layer may include a reflective metal material
Data Source
AI summary
A display device includes a substrate including a semiconductor chip, and having a display region, and a peripheral region adjacent to the display region, pixels above the substrate in the display region, and a crack detection line above the substrate in the peripheral region.