Display Panel Crack Detection Line Design
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Solution Overview
Problem
Flat panel display devices, particularly OLEDs, face challenges in detecting cracks and defects early enough to prevent overheating and potential fires due to short circuits, making it difficult to minimize damage and ensure user safety.
Innovation Solution
A display panel design incorporating a crack detection line with stacked conductive layers and insulating layers in the peripheral area, connected to data lines, which detects damage by applying specific signals and sensing voltage differences to identify cracks and defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the display panel is made large, light, and thin to achieve weight reduction and thinness, then the display device becomes more portable and compact, but the display panel becomes more susceptible to cracking and breakage from external impact
Solution Approach 1:
The patent incorporates a crack detection line with stacked conductive layers and insulating layers into the display panel structure during manufacturing. This preliminary action enables early detection of cracks before they cause serious damage, allowing the system to take preventive measures such as turning off the display or alerting the user, thereby maintaining reliability while preserving the lightweight and thin design.
2Reliability
If crack detection functionality is added to the display panel, then early detection of damage is enabled to prevent overheating and fire, but the device complexity increases
Solution Approach 1:
The patent merges the crack detection functionality with the existing display panel structure by integrating the crack detection line into the same substrate and stacking layers. The detection line shares the same manufacturing process and structural framework as the display panels, eliminating the need for separate detection systems and thereby reducing overall device complexity while enabling reliable crack detection.
Solution Approach 2:
The stacked conductive layers and insulating layers in the crack detection line serve multiple functions: they detect cracks through electrical resistance changes, provide structural support, and can be integrated with the display panel's existing wiring and insulation systems. This multi-functionality reduces the need for additional separate components, thereby managing device complexity while achieving reliable detection.
3Measurement precision
If the crack detection line uses multiple stacked conductive layers and insulating layers, then detection precision is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent utilizes changes in electrical resistance parameters as the detection mechanism. When a crack occurs, it changes the electrical resistance of the crack detection line, which can be measured to detect the crack's presence. This parameter-based approach improves detection precision while using standard manufacturing processes for creating the stacked layers, thereby managing manufacturing precision requirements.
Data Source
AI summary
A display panel including: pixels disposed in an active area of a substrate; data lines connected to the pixels; and a crack detection line disposed in a peripheral area of the active area in the substrate. The crack detection line includes a plurality of stacked conductive layers and at least one insulating layer disposed therebetween. At least one of the conductive layers is electrically connected to any one of the data lines.