Touch Display Panel Blocking Column Prevents Inorganic Layer Contact
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Solution Overview
Problem
In in-cell touch display panels, abnormal contact between touch wires and touch terminals can occur due to the CVD process, leading to compromised touch performance, especially when the bezel is narrow and the inorganic layers cover the transfer apertures, affecting the electrical connections.
Innovation Solution
A touch display panel design featuring a substrate with a non-display region that includes a step region with a blocking column, which prevents the inorganic layer from extending to the touch terminals, thereby avoiding abnormal contact and enhancing touch performance by maintaining reliable electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the bezel of the display panel is made relatively narrow, then the overall appearance and compactness are improved, but the CVD boundary may cover the transfer apertures, resulting in abnormal contact between touch wires and touch terminals
Solution Approach 1:
The non-display region is divided into a first region and a second region, with the CVD process boundary positioned between them. This segmentation prevents the inorganic layer from extending into the second region where touch terminals are located, thereby avoiding abnormal contact while maintaining a narrow bezel width.
Solution Approach 2:
A blocking column is introduced as an intermediary structure in the first region to prevent the inorganic layer from extending into the second region. This blocking column acts as a mediator that stops the harmful extension of the inorganic layer while allowing the touch wires to pass through normally.
2Strength
If the inorganic layer is extended to cover the touch terminals, then the encapsulation and protection are improved, but abnormal contact between touch wires and touch terminals occurs
Solution Approach 1:
The encapsulation structure is segmented such that the inorganic layer covers the touch wires in the first region but is blocked from extending into the second region where touch terminals are located. This segmentation maintains protection for the touch wires while preventing harmful contact with terminals.
Solution Approach 2:
The touch terminals are extracted from the area covered by the inorganic layer by positioning them in the second region, which is separated from the CVD boundary. This extraction allows the inorganic layer to provide encapsulation protection without causing abnormal contact with the terminals.
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
The design effectively reduces the risk of abnormal contact between touch wires and terminals, improving the overall touch performance and reliability of the touch display panel, even in narrow bezel configurations.
Implementation Method 1
Some inorganic layers in the display panel are generally formed through a chemical vapor deposition (CVD) process
Data Source
AI summary
A touch display panel includes a substrate including display region and non-display region; light-emitting elements disposed in the display region; encapsulation layer including at least one inorganic layer and at least one organic layer that are stacked; touch layer disposed on a side of the at least one inorganic layer facing away from the light-emitting elements; plurality of touch wires extending to the non-display region along first direction; and step region including first region with at least one wall and second region with plurality of touch terminals, where at least part of the touch terminals are electrically connected to the touch wires in one-to-one manner, the second region includes at least one blocking column which extends along second direction and configured to prevent the at least one inorganic layer disposed between the touch layer and the substrate and in the encapsulation layer from extending to the touch terminals.