Display Substrate Motherboard Detection Region Layout
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Solution Overview
Problem
Current display substrate motherboards face yield reduction due to short-circuiting issues during the cutting process, where the detecting circuit is often cut off, leading to electrical connections between adjacent signal lines.
Innovation Solution
The display substrate motherboard design includes a detection region on one side of the display region, separate from the bonding region, with signal lines extending to the detection region, allowing for increased separation distance and reduced risk of short circuits, and incorporates switching elements and detection control lines to manage electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the detecting circuit is placed in the bonding region, then the detection function can be implemented, but the signal lines are at risk of being cut off during the cutting process, causing short circuits
Solution Approach 1:
The detection region is extracted from the bonding region and placed in a separate non-display region. This separation allows the detecting circuit to remain functional while removing it from the high-risk cutting zone, thereby eliminating the short circuit risk during the cutting process.
Solution Approach 2:
The layout is reorganized by utilizing the non-display region, which is a previously underutilized spatial dimension. By placing the detection region in this separate area, the design achieves spatial separation between the detection function and the bonding region, solving the contradiction between detection capability and cutting safety.
2Object-affected harmful factors
If the detection region is separated from the bonding region, then the risk of short circuits is reduced, but the device structure becomes more complex
Solution Approach 1:
The non-display region, which originally served only as a structural or inactive area, is repurposed to host the detection region. This multi-functional utilization of existing space avoids adding extra structural complexity while achieving the separation needed to reduce short circuit risks.
Solution Approach 2:
The detection region is merged with the non-display region, creating an integrated structure that combines previously separate functions. This merging approach simplifies the overall device structure by eliminating the need for additional separate components or complex interconnections.
3Measurement precision
If signal lines extend to the detection region, then detection accuracy is improved, but the signal lines are more vulnerable to damage during cutting
Solution Approach 1:
The signal lines are extracted from the bonding region and extended to the separately located detection region in the non-display area. This extraction removes the signal lines from the cutting path, protecting them from damage while maintaining their connection to the detection circuit for accurate measurements.
Solution Approach 2:
The non-display region acts as an intermediary space that accommodates both the extended signal lines and the detection region. This intermediary zone allows signal lines to reach the detection circuit without passing through the cutting region, thereby protecting the signal lines while enabling accurate detection.
Data Source
AI summary
At least one embodiment of the present disclosure provides a display substrate motherboard, a display substrate, a fabrication method thereof and a display device. The display substrate motherboard includes at least one display substrate unit, the display substrate unit includes a display region, a bonding region and a detection region, the bonding region is located on a side of the display region and the detection region is located on a side of the display region different from the bonding region and configured to detect the display substrate unit.