Capacitive Sensing Wire Segmentation for Display Reliability
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Solution Overview
Problem
As display devices increase in size, the width of wires in capacitive sensing structures increases, leading to separation of upper and lower wires, which affects the electrical resistance and reliability of the sensing structure.
Innovation Solution
The sensing structure incorporates a wire with strategically placed openings and varying widths to maintain electrical connectivity, reducing the risk of separation between upper and lower wires, and includes a dummy wire to prevent light leakage and enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the width of the wire is increased to reduce electrical resistance, then the electrical resistance is reduced, but the upper wire and lower wire may separate from each other
Solution Approach 1:
The wire is divided into multiple segments (upper wire and lower wire) that are stacked vertically. By segmenting the wire structure, each individual wire layer can maintain a smaller width while collectively providing low electrical resistance through parallel conduction paths. This segmentation prevents the separation issue that would occur with a single wide wire while still achieving the goal of reducing electrical resistance.
Solution Approach 2:
The wire structure transitions from a two-dimensional planar configuration to a three-dimensional stacked configuration. By adding the vertical dimension and stacking multiple wire layers, the design achieves low electrical resistance without increasing the horizontal width, thereby preventing wire separation while maintaining electrical performance.
2Loss of energy
If the width of the wire is increased to reduce electrical resistance, then the electrical resistance is reduced, but the wire structure becomes more complex
Solution Approach 1:
The wire is divided into multiple segments (upper wire and lower wire) that are stacked vertically. By segmenting the wire structure, each individual wire layer can maintain a smaller width while collectively providing low electrical resistance through parallel conduction paths. This segmentation prevents the separation issue that would occur with a single wide wire while still achieving the goal of reducing electrical resistance.
Solution Approach 2:
The wire structure transitions from a two-dimensional planar configuration to a three-dimensional stacked configuration. By adding the vertical dimension and stacking multiple wire layers, the design achieves low electrical resistance without increasing the horizontal width, thereby preventing wire separation while maintaining electrical performance.
3Area of stationary object
If the display device size is increased, then the display device can accommodate larger screens, but the wire width must be increased which leads to wire separation
Solution Approach 1:
The wire is divided into multiple segments (upper wire and lower wire) that are stacked vertically. By segmenting the wire structure, each individual wire layer can maintain a smaller width while collectively providing low electrical resistance through parallel conduction paths. This segmentation prevents the separation issue that would occur with a single wide wire while still achieving the goal of reducing electrical resistance.
Solution Approach 2:
The wire structure transitions from a two-dimensional planar configuration to a three-dimensional stacked configuration. By adding the vertical dimension and stacking multiple wire layers, the design achieves low electrical resistance without increasing the horizontal width, thereby preventing wire separation while maintaining electrical performance.
Data Source
AI summary
A sensing structure includes: a substrate including a sensing area and a peripheral area located adjacent to the sensing area; a sensing electrode disposed in the sensing area of the substrate; and a first wire disposed in the peripheral area of the substrate, wherein the first wire is connected to the sensing electrode, and the first wire has at least one opening.