Dual-Layer Sensing Wiring for Display Panel Connection Stability
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Solution Overview
Problem
The integration of input sensing panels with display panels in display devices is often unstable due to foreign materials or moisture permeation, which reduces the reliability of the connection between the two panels.
Innovation Solution
A double wiring structure combining metal and transparent conductive wiring is used to enhance the connection between the input sensing panel and the display panel, with transparent conductive wiring on the input sensing panel and metal wiring electrically connected to it, ensuring improved durability and preventing light blocking during the curing of the coupling member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal wiring is used for sensing lines in input sensing panel, then electrical conductivity and durability are improved, but light used to cure coupling member is blocked, reducing connection integrity
Solution Approach 1:
The sensing wiring is segmented into two distinct layers: a lower transparent conductive wiring layer that allows light transmission for coupling member curing, and an upper metal wiring layer that provides superior electrical conductivity and durability. This segmentation resolves the contradiction by assigning different functions to different layers.
Solution Approach 2:
The solution transitions from a single-plane wiring structure to a multi-layer vertical structure. The transparent conductive wiring is positioned in the lower layer while the metal wiring is positioned in the upper layer, utilizing the vertical dimension to simultaneously achieve light transmission and electrical conductivity.
2Ease of manufacture
If input sensing panel is combined with display panel through separate processes, then manufacturing flexibility is improved, but connection stability deteriorates due to foreign material or moisture permeation
Solution Approach 1:
A waterproof encapsulation structure using thin film layers is implemented at the connection interface between the input sensing panel and display panel. This encapsulation prevents foreign materials and moisture from permeating the connection region, maintaining connection stability while allowing separate manufacturing processes.
3Reliability
If metal wiring overlaps coupling region, then electrical connection is improved, but light transmission for curing is blocked
Solution Approach 1:
The wiring structure is segmented vertically with the metal wiring placed in the upper layer and the transparent conductive wiring in the lower layer. This segmentation allows the metal wiring to provide electrical connection while the lower transparent layer ensures light transmission for coupling member curing.
Solution Approach 2:
The wiring arrangement moves from a planar overlap to a vertical stacking configuration. The metal wiring and transparent conductive wiring are positioned at different vertical levels, eliminating light blocking while maintaining electrical connectivity through the multi-layer structure.
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
This solution improves the durability of the sensing wiring and the coupling member area, reducing the likelihood of connection instability and enhancing the overall reliability of the display device.
Implementation Method 1
a coupling member to connect the first substrate and the second substrate
Implementation Method 2
transparent conductive wiring disposed on the second substrate, and a metal wiring disposed on the transparent conductive wiring
Implementation Method 3
sensing wirings electrically connected with the sensing electrodes
Implementation Method 4
the metal wiring that forms the sensing lines in an input sensing panel may block light used to cure a coupling member
Data Source
AI summary
A display device including a first substrate, a second substrate, sensing electrodes disposed on the second substrate and to sense an input, sensing wirings electrically connected to the sensing electrodes, an input sensing panel including sensing pads electrically connected to the sensing wirings, and a coupling member to couple the first substrate and the second substrate, wherein the sensing wirings respectively include transparent conductive wirings disposed on the second substrate and metal wirings disposed on the transparent conductive wirings and electrically connected to the transparent conductive wirings, and each of the sensing pad includes a transparent conductive pad disposed on the second substrate and connected to the transparent conductive wiring.