Capacitive Touch Sensing Assembly with Merged X-Y Traces
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Solution Overview
Problem
Prior capacitive touch panels with X and Y axis sensing traces formed separately suffer from misalignment issues, affecting sensitivity and precision, and cause image distortion due to differing light permeability between traces and un-patterned areas.
Innovation Solution
A capacitive touch sensing assembly with X and Y axis traces formed on the same plane, using a transparent capacitive sensing layer with intersecting traces, an inducting layer with conducting wires, and an isolating layer to ensure precise alignment and uniform light permeability, reducing the number of layers and assembly complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If X and Y axis sensing traces are formed on separate layers, then the manufacturing process can be divided into independent steps, but misalignment occurs during assembly reducing sensing precision
Solution Approach 1:
The patent merges the X andY axis sensing traces onto a single substrate layer, eliminating the need for separate layer assembly. This integration ensures precise alignment of intersecting traces while maintaining manufacturing feasibility through single-layer fabrication processes.
2Ease of manufacture
If X andY axis sensing traces are formed on separate layers, then each layer can be manufactured independently, but the number of layers increases causing image distortion
Solution Approach 1:
The patent combines both sensing trace patterns into a single transparent layer, reducing the total number of layers in the touch panel assembly. This minimizes light refraction and image distortion while maintaining the capability to manufacture the sensing layer independently with precise trace patterns.
3Quantity of substance
If multiple separate layers with traces are used, then the sensing coverage can be distributed, but the assembly complexity increases
Solution Approach 1:
The patent integrates both X andY axis sensing traces into a single layer structure, maintaining comprehensive sensing coverage through intersecting trace patterns while significantly reducing assembly complexity by eliminating the need to align and bond multiple separate sensing layers.
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 enhances sensitivity and precision of sensing signals, simplifies the manufacturing process, lowers costs, and corrects image distortion by ensuring uniform light permeability across the touch panel.
Implementation Method 1
When operating, an instant capacity effect is generated by a conductor or a user's finger touch so as the position being touched will be located by detection of the variation of capacitance
Implementation Method 2
a gluing layer being an insulated transparent UV adhesive arranged between the first and the second substrates so as to glue the first and the second substrates as a plate body
Data Source
AI summary
A capacitive touch sensing assembly is a plate body assembled by a first and second substrate glued by a gluing layer. The first and second substrates are insulated transparent thin plates, and the gluing layer is an insulated transparent adhesive. On an upper surface of the first substrate, a capacitive sensing layer including a plurality of transparent first and second axis traces intersecting to each other. Induction-spots formed on each first axis trace are connected one by one, and induction-spots formed on each second axis trace are formed separately with gaps. An inducting layer has a plurality of conducting wires formed along the direction of the second axis traces. Electrical joints formed on two ends of the conducting wires contact the two adjacent induction-spots of the second axis traces respectively so as to electrically connect all induction-spots on each second axis trace.