Curved Wired Electrode for Touch Screen Panels
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Solution Overview
Problem
The existing wired electrodes for touch screen panels face issues with embossing mold breakage during demolding and instability in filling conductive material, leading to incomplete signal transmission to external driving circuits.
Innovation Solution
The introduction of curved portions and fine protrusions in the wired electrodes prevents embossing mold breakage and ensures stable filling of conductive material, enhancing signal transmission by eliminating folded portions and increasing contact area with the conductive material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a folded portion is provided in the signal transmitting part of the wired electrode, then the wired electrode can be formed in a groove of the substrate, but the embossing mold may be broken during the demolding process
Solution Approach 1:
The patent replaces the folded portion with a curved portion in the signal transmitting part of the wired electrode. This curved design eliminates the sharp angles and stress concentration points that cause embossing mold breakage during demolding, while still allowing the wired electrode to be properly formed in the groove structure of the substrate.
2Device complexity
If a simple-shaped groove is used for filling conductive material, then the manufacturing process is simplified, but the conductive material may be easily separated during the manufacturing process
Solution Approach 1:
The patent introduces fine protrusions at specific locations within the groove structure where conductive material is filled. These localized protrusions create mechanical interlocking features that prevent conductive material separation during manufacturing, while the overall groove structure remains relatively simple and easy to manufacture.
3Ease of operation
If folded portions are used in the wired electrode, then the electrode can connect contact part and bonding part, but the filling stability of conductive material is poor
Solution Approach 1:
The curved portion design provides smooth transitions that facilitate complete and stable filling of conductive material, eliminating the filling instability associated with folded portions while maintaining the electrical connectivity function between contact part and bonding part.
Solution Approach 2:
Fine protrusions are strategically placed within the groove to enhance conductive material retention at critical locations, ensuring stable filling and preventing material separation while maintaining the overall connectivity function of the wired electrode.
Data Source
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AI summary
Disclosed is a wired electrode of touch screen panel for transmitting a touch signal sensed by a signal sensing pattern of touch screen panel to an external driving circuit, wherein the wired electrode formed on a substrate includes at least one curved portion, and a plurality of fine protrusions are formed on an inner surface of a groove of a resin layer on the substrate. The groove is filled with a conductive material to form the wired electrode.