Touch Display Panel Layout to Prevent FMLOC Short-Circuiting
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Solution Overview
Problem
Flexible multilayer on cell (FMLOC) technology-based display panels are prone to large-area short-circuiting due to potential contact between the touch signal line and trace, exacerbated by manufacturing anomalies and bending, which affects the display performance.
Innovation Solution
The touch display panel design includes a touch connection line that overlaps and electrically connects with the edges of the trace, reducing the length of the touch signal line and incorporating switching lines to avoid abnormal contact and short-circuiting, while utilizing a bending region to manage component alignment and insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the touch signal line is made longer to reach the touch region, then the signal transmission coverage is improved, but the anti-bending capability deteriorates and short-circuiting risk increases
Solution Approach 1:
The touch connection line is positioned in a different layer from the touch signal line, utilizing the vertical dimension to achieve spatial separation. This allows the touch signal line to be shorter while still maintaining electrical connection to the touch region, thereby improving anti-bending capability without sacrificing signal transmission coverage.
Solution Approach 2:
The touch connection line acts as an intermediary component that bridges the touch signal line and the touch region. By introducing this intermediate structure in a different layer, the patent reduces the direct exposure of the touch signal line to bending forces while maintaining electrical connectivity.
2Reliability
If the touch signal line is made shorter to improve anti-bending capability, then the reliability is improved, but the signal transmission coverage deteriorates
Solution Approach 1:
The patent utilizes the vertical layer dimension to position the touch connection line separately from the touch signal line. This allows the touch signal line to remain short and reliable while the touch connection line extends to reach the touch region, effectively decoupling the length requirements for signal coverage and bending resistance.
3Productivity
If the touch signal line is positioned closer to the trace for electrical connection, then the connection efficiency is improved, but the risk of abnormal contact and short-circuiting increases
Solution Approach 1:
The touch connection line is positioned in a different layer than the trace and touch signal line, utilizing the vertical dimension to achieve electrical connection without direct horizontal proximity. This spatial arrangement maintains connection efficiency while preventing abnormal contact between the touch signal line and trace.
Solution Approach 2:
The touch connection line serves as an intermediary that provides electrical connection between the touch signal line and touch region without requiring the touch signal line to be in direct contact with the trace. This intermediate structure maintains connection efficiency while eliminating the short-circuiting risk associated with direct proximity.
4Reliability
If the insulation material is formed at the edge of the trace for protection, then the insulation coverage is improved, but manufacturing anomalies may occur that lead to short-circuiting
Solution Approach 1:
The patent positions the touch connection line in a different layer from the trace, allowing insulation material to be formed at the trace edge without creating abnormal contact paths. The vertical separation ensures that even if insulation anomalies occur at the trace edge, they cannot cause short-circuiting between the touch signal line and trace.
Data Source
AI summary
The present disclosure relates to a touch display panel and a display apparatus. The touch display panel includes a touch region and a switching region, where the touch region includes a light emitter is adjacent to the switching region. The touch display panel includes: a substrate; a trace, where at least part of the trace is in the switching region on the substrate; a touch signal line, at a side of the trace away from the substrate; and a touch connection line, electrically connected with the touch signal line and in a different layer from the trace and the touch signal line. In a direction perpendicular to the substrate, the touch connection line overlaps at least part of edges of the trace. According to the embodiments of the present disclosure, large-area short-circuiting on the display panel can be avoided.