Touch Input Device with Laser Direct Structured Electrodes
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Solution Overview
Problem
Traditional touch input devices require adhesion methods, which are costly, vulnerable to external vibrations and high temperatures, and use rare-earth materials, making them unsuitable for durable applications, especially in devices that experience vibrations and high temperatures.
Innovation Solution
A touch input device with electrodes formed without adhesion, using a metal composite base with pattern grooves and conductive sensing patterns connected to an integrated circuit, manufactured using a laser direct structuring process, allowing for a slim and durable design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesion methods are used to attach metal patterns to touch panels, then electrical connection is achieved, but manufacturing cost increases and durability decreases due to vulnerability to vibrations and high temperatures
Solution Approach 1:
The base material and electrode pattern are merged into a single integrated structure. The metal composite base includes the sensing patterns directly formed within it, eliminating the need for separate adhesion processes to attach metal patterns to the touch panel, thereby reducing manufacturing complexity and improving durability
Solution Approach 2:
The base is constructed using a metal composite material that combines metallic properties (electrical conductivity) with structural properties (durability, vibration resistance). This composite material allows the base to serve both as the structural support and as the electrode pattern carrier without requiring additional adhesion layers
2Reliability
If adhesion methods are used to attach metal patterns, then electrode formation is achieved, but resistance to vibrations and high temperatures deteriorates
Solution Approach 1:
The base material and electrode pattern are merged into a single integrated structure. The metal composite base includes the sensing patterns directly formed within it, eliminating the need for separate adhesion processes to attach metal patterns to the touch panel, thereby reducing manufacturing complexity and improving durability
Solution Approach 2:
The metal composite base serves multiple functions simultaneously: it provides structural support, electrical conductivity, and vibration resistance. The base material itself forms the electrode patterns without requiring external adhesion materials, making the structure self-sufficient and more resistant to environmental stress
3Reliability
If ITO (Indium Thin Oxide) is used as transparent electrode, then touch panel functionality is achieved, but manufacturing cost increases due to rare-earth materials
Solution Approach 1:
The invention replaces expensive ITO material with a more cost-effective metal composite material. The metal composite base provides the necessary electrical conductivity and structural properties at a lower cost, eliminating dependence on rare-earth materials like indium
Solution Approach 2:
The base is constructed using a metal composite material that combines metallic properties (electrical conductivity) with structural properties (durability, vibration resistance). This composite material allows the base to serve both as the structural support and as the electrode pattern carrier without requiring additional adhesion layers
4Ease of manufacture
If typical manufacturing methods with multiple processing stages are used, then touch input device is produced, but manufacturing efficiency decreases and cost increases
Solution Approach 1:
The base material and electrode pattern are merged into a single integrated structure. The metal composite base includes the sensing patterns directly formed within it, eliminating the need for separate adhesion processes to attach metal patterns to the touch panel, thereby reducing manufacturing complexity and improving durability
Solution Approach 2:
The metal composite base performs multiple functions simultaneously: structural support, electrical conductivity, and vibration resistance. This multi-functional design reduces the number of separate components and manufacturing steps required, thereby improving manufacturing efficiency
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 provides a cost-effective, durable, and vibration-resistant touch input device capable of operating in high-temperature environments, enhancing its reliability and manufacturing efficiency.
Implementation Method 1
manufactured using a laser direct structuring process
Data Source
AI summary
A touch input device includes: a main body including a touch input unit disposed on a surface of the main body and a base including a metal composite disposed on another surface of the main body; a first pattern groove engraved in a surface of the base; a second pattern groove engraved in the surface of the base and disposed adjacent to the first pattern groove; a first sensing pattern disposed in the first pattern groove and including a conductive material; and a second sensing pattern disposed in the second pattern groove and including a conductive material; and a wire connecting the first sensing pattern and the second sensing pattern to an integrated circuit.