OLED Panel Hole Area Cracking Detection via Control Circuit Disconnection
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Solution Overview
Problem
In organic electroluminescent display panels, the inorganic film layer in the hole area is prone to cracking due to external forces, leading to encapsulation failures, which are difficult to detect early and result in progressive defects, causing waste of resources and user experience issues.
Innovation Solution
The organic electroluminescent display panel incorporates a first light-emitting control line surrounding the hole area with a control component that disconnects the light-emitting control circuit during defect detection, allowing for the determination of cracking by observing the light-emitting state of pixels, using molybdenum for the control line to enhance detection sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the inorganic film layer in the hole area is left without special protection, then the device structure remains simple, but the film layer is prone to cracking due to external forces leading to encapsulation failures
Solution Approach 1:
The patent applies preliminary action by pre-arranging the light-emitting control line to surround the hole area and positioning control components at strategic locations before any cracking occurs. This allows the detection system to be ready in advance to identify cracking events as they happen, rather than attempting to prevent cracking through complex structural modifications.
Solution Approach 2:
The patent employs self-service by using the light-emitting control line and pixel light-emitting state as the detection indicator itself. The existing functional components serve dual purposes: they perform their primary light-emitting control function while simultaneously acting as the detection system for cracking, eliminating the need for separate dedicated detection structures.
2Measurement precision
If complex detection structures are added to detect cracking early, then detection precision improves, but device complexity increases
Solution Approach 1:
The patent employs self-service by using the light-emitting control line and pixel light-emitting state as the detection indicator itself. The existing functional components serve dual purposes: they perform their primary light-emitting control function while simultaneously acting as the detection system for cracking, eliminating the need for separate dedicated detection structures.
Solution Approach 2:
The patent uses an intermediary approach by introducing control components that act as mediators between the light-emitting control circuits and the surrounding light-emitting control line. These control components enable selective disconnection to isolate and detect cracking effects, allowing precise measurement without requiring direct complex detection structures at every potential crack site.
3Measurement precision
If the control component disconnects the light-emitting control circuit during detection, then cracking detection capability improves, but the light-emitting control circuit operation is interrupted
Solution Approach 1:
The patent applies periodic action by implementing detection at specific timing moments during the light-emitting control cycle. The control component disconnects the light-emitting control circuit only during designated detection periods, allowing cracking assessment to occur at intervals rather than continuously, thus minimizing operational interruption while maintaining effective monitoring.
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
This method enables early detection of cracking in the inorganic film layer, preventing defective products from reaching users and reducing resource waste by identifying dark lines indicative of pixel failure, thus ensuring timely identification and rectification of defects.
Implementation Method 1
determine a cracking state of the hole area according to a light-emitting state of pixels driven by the connecting portion between the control component and the hole area
Data Source
AI summary
Embodiments of the present disclosure provide an organic electroluminescent display panel, a display device, and a detection method. For the organic electroluminescent display panel, the light-emitting control lines include two first light-emitting control lines electrically connected to the two light-emitting control circuits; and each first light-emitting control line includes: a surrounding portion surrounding the hole area, and a connecting portion electrically connecting two ends of the surrounding portion to the two light-emitting control circuits, the connecting portion is electrically connected by a control component at a position of being connected to one light-emitting control circuit, and the control component is configured to disconnect the light-emitting control circuit from the connecting portion when defect detection is performed, to determine a cracking state of the hole area according to a light-emitting state of pixels driven by the connecting portion between the control component and the hole area.