Capacitive Touch Sensing Structure With Holes In Insulating Layer
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Solution Overview
Problem
Conventional capacitive touch panels suffer from low light transmittance and rigidity due to the presence of insulators, which cause light reflection and refraction, and make the conductive lines prone to breakdown under external forces.
Innovation Solution
A touch sensing structure featuring an insulating layer with holes above the conductive lines, connecting adjacent conductive cells on the insulating layer to ensure electrical insulation, and a multi-layer conductive line structure using materials like molybdenum and aluminum for enhanced conductivity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulators are disposed between conductive lines to provide electrical insulation, then electrical insulation is achieved, but light transmittance decreases and rigidity decreases
Solution Approach 1:
The patent applies porous materials by forming an insulating layer with a plurality of holes ( openings) that extend from the first surface to the second surface. These holes allow light to pass through the insulating layer, significantly improving light transmittance while maintaining the electrical insulation function between the first and second conductive lines. The porous structure enables light transmission paths through the insulator without compromising its insulating capability.
Solution Approach 2:
The patent applies local quality by creating different regions within the insulating layer: regions with holes for light transmission and regions without holes for electrical insulation. The holes are strategically positioned to allow light passage while the solid insulating material maintains electrical isolation between conductive lines. This local differentiation resolves the contradiction between light transmittance and electrical insulation.
2Reliability
If insulators are disposed between conductive lines to provide electrical insulation, then electrical insulation is achieved, but rigidity decreases and conductive lines become prone to breakdown
Solution Approach 1:
The patent applies composite materials by combining the insulating layer with conductive line structures to form a composite touch sensing structure. The insulating layer provides both electrical insulation and mechanical support, while the conductive lines provide electrical conductivity. This composite structure enhances overall rigidity and prevents conductive line breakdown under external forces while maintaining electrical insulation functionality.
Solution Approach 2:
The insulating layer acts as an intermediary between the first and second conductive lines, providing both electrical insulation and mechanical support. The layer with holes serves as a mediator that allows light transmission while maintaining the structural integrity and rigidity of the overall structure, preventing conductive lines from breaking under external pressure.
3Reliability
If conventional insulator structures are used, then electrical insulation is provided, but manufacturing complexity increases
Solution Approach 1:
The patent applies merging by combining multiple functions into the insulating layer: electrical insulation, mechanical support for conductive lines, and light transmission medium. The holes are formed directly in the insulating layer during the manufacturing process, integrating the light transmission function into the insulator itself rather than requiring separate components. This reduces manufacturing complexity while achieving all required functions.
Data Source
AI summary
The present invention discloses a touch sensing structure for capacitive touch panel comprising a substrate, at least one first conductive line formed on the substrate, an insulating layer formed on the substrate and covering the first conductive line, the insulating layer having at least two adjacent holes therein formed above the two ends of the first conductive line respectively, at least two adjacent first conductive cells, at least two adjacent second conductive cells and at least one second conductive line formed on the insulating layer, the adjacent first conductive cells connected to two ends of the first conductive line correspondingly, the second conductive cells located on two sides of the first conductive line respectively, the second conductive line located on the insulating layer for interconnecting the adjacent second conductive cells, and the insulating layer makes the first conductive line electrically insulated from the second conductive line, thereby forming the touch sensing structure.