Display Panel Crack Detection via Touch Layer Integration
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Solution Overview
Problem
The challenge in display technology is the occurrence of cracks at the edge of holes in irregularly-shaped display panels, which can affect display performance due to drilling, and there is a need for effective crack detection methods without increasing wiring complexity or affecting display quality.
Innovation Solution
A display panel design incorporating a detection line with detection soldering pads and segments in the bezel and display areas, integrated with a touch layer, allowing for crack detection without complicating the substrate wiring or impacting display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a hole is drilled in the display panel to place a device, then the bezel size is reduced, but drilling cracks may occur at the edge of the hole
Solution Approach 1:
The patent applies preliminary action by pre-defining a hole isolation region around the hole area before drilling occurs. This isolation region acts as a buffer zone that prevents stress concentration and crack propagation at the hole edges during the drilling process, thereby maintaining structural integrity while enabling bezel reduction.
2Measurement precision
If detection lines are added to detect cracks, then crack detection capability is improved, but wiring complexity increases
Solution Approach 1:
The patent merges the detection line with the touch layer, combining two functional elements into a single integrated structure. The detection line is formed as part of the touch layer's conductive pattern, allowing crack detection functionality to be achieved without adding separate wiring layers or increasing overall wiring complexity.
Solution Approach 2:
The touch layer serves multiple functions: it provides touch sensing capability and simultaneously serves as the medium for the detection line. By making the detection line part of the touch layer structure, the system achieves multi-functionality where one layer performs both touch interaction and crack detection purposes.
Data Source
AI summary
A display panel and a display apparatus are provided. The display panel includes a display area, a bezel area, and a hole area. The bezel area includes an inner bezel area surrounding the hole area and an outer bezel area surrounding the display area, and the display area surrounds the hole area and is disposed between the inner bezel area and the outer bezel area. The display panel further includes a substrate layer, a light-emitting layer, an encapsulation layer and a touch layer, that are sequentially stacked; a detection line including a first detection line. The first detection line includes a first detection segment disposed in the inner bezel area, a third detection segment disposed in outer bezel area, and a second detection segment electrically connecting the first detection segment and the third detection segment. The second detection segment is disposed in the touch layer.