Conductor Support Member for Touch Display Substrates
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Solution Overview
Problem
Existing touch detection devices, such as liquid-crystal display devices, face issues with electrical coupling between substrates due to gaps outside the sealing member, leading to potential disconnection of conductive paste and failure in fine wiring functionality.
Innovation Solution
A display device with a touch detection function is designed, featuring a conductor support member that fills the space between substrates and a conductor provided on its surface, ensuring reliable electrical coupling and preventing conductor spread or disconnection, along with a wiring member for coupling touch detection and drive electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If conductive paste is applied to the side portion of substrates for reducing device thickness, then the device thickness is reduced, but the conductive paste may spread due to capillary phenomenon in gaps outside the sealing member, causing adjacent wirings to be electrically coupled and wiring function to fail
Solution Approach 1:
The patent introduces a conductor support member as an intermediary component between the substrates. This support member provides a dedicated surface for mounting conductors and fills gaps outside the sealing member, preventing conductive paste from spreading via capillary phenomenon while maintaining reduced device thickness.
Solution Approach 2:
The patent segments the conductor support structure into a base portion mounted on the substrate and a protruding portion that extends into the gap region. This segmentation allows the conductor support member to simultaneously provide mounting surface and gap-filling functions, preventing paste spread while maintaining wiring integrity.
2Reliability
If conductive paste is used for electrical coupling between substrates, then electrical coupling is achieved, but fine wiring functionality may be compromised due to conductor spread in gaps
Solution Approach 1:
The conductor support member serves as an intermediary platform that precisely positions conductors. By providing a dedicated mounting surface with controlled geometry, it enables precise wiring patterns while preventing conductive paste from spreading into gap regions, thus maintaining both electrical coupling and manufacturing precision.
Solution Approach 2:
The conductor support member creates locally differentiated regions: a flat base portion for stable mounting on the substrate and a protruding portion that extends into the gap area. This local quality differentiation allows precise conductor positioning on the base while the protruding portion prevents paste spread in the gap region.
3Ease of manufacture
If the space between substrates is left unfilled at edge positions, then device assembly is simplified, but conductors may become disconnected due to lack of support
Solution Approach 1:
The conductor support member acts as an intermediary structural element that fills the space between substrates at edge positions. It provides continuous physical support for conductors from the substrate surface through the gap region, ensuring reliable conductor connections while maintaining simplified assembly processes.
Solution Approach 2:
The conductor support member extends in the thickness dimension (z-direction) from the substrate surface into the gap region. This dimensional extension provides three-dimensional structural support that prevents conductor disconnection while maintaining ease of manufacture through a single integrated component.
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 solution ensures stable and efficient touch detection performance by preventing conductor spread and disconnection, enhancing the reliability of touch detection signals and reducing the risk of electrical coupling failures.
Implementation Method 1
Because the gap is small, the conductive paste may spread caused by a capillary phenomenon
Data Source
AI summary
According to an aspect, a display device with a touch detection function includes: a touch detection electrode that detects proximity or contact of an object; a drive electrode to which the excitation signal is applied; a first substrate on which the drive elements are provided; a second substrate on which at least one of the touch detection electrode and the drive electrode is provided, the second substrate being bonded to the first substrate to face each other via a sealing member; a conductor that electrically is coupled to at least one of the touch detection electrode and the drive electrode; and a conductor support member that fills a space between the first substrate and the second substrate and on the surface of which the conductor is provided.