Transparent Laminate Electrode Pattern Invisibility
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Solution Overview
Problem
Capacitance type input devices suffer from poor visibility due to conspicuous transparent electrode patterns, which are not fully obscured by existing layer configurations.
Innovation Solution
A transparent laminate configuration with specific refractive index and thickness ranges for the first and second transparent films, along with a transparent electrode pattern, is used to minimize the visibility of the electrode pattern by continuous coverage and adjacent positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a transparent electrode pattern is formed on a substrate, then the capacitance type input device can detect contact position, but the transparent electrode pattern becomes visually conspicuous
Solution Approach 1:
The patent applies optical interference effects by laminating low refractive index dielectric material layers and high refractive index dielectric material layers to change the optical properties of the transparent electrode pattern, making it visually inconspicuous while maintaining its electrical functionality for contact position detection
Solution Approach 2:
The patent creates a composite structure by combining transparent electrode material with multiple dielectric material layers of different refractive indices, forming a multi-layered composite that simultaneously achieves electrical functionality and optical invisibility
2Object-affected harmful factors
If low refractive index and high refractive index dielectric material layers are laminated on one side of the ITO pattern, then the transparent electrode pattern becomes less conspicuous, but the solution is incomplete
Solution Approach 1:
The patent divides the concealment function into multiple segments by laminating dielectric material layers on both the upper side and lower side of the transparent electrode pattern, with each layer contributing to the overall optical interference effect that fully conceals the pattern
Solution Approach 2:
The patent extends the solution from one-dimensional layering (single side) to two-dimensional layering (both sides), adding the dimension of bilateral symmetry to achieve complete concealment of the transparent electrode pattern
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 effectively reduces the visual recognition of the transparent electrode pattern, enhancing the appearance of the device by ensuring the pattern is inconspicuous.
Implementation Method 1
a region where a transparent substrate, a first transparent film which has a refractive index of 1.6 to 1.78 and a film thickness of 55 nm to 110 nm, a transparent electrode pattern, and a second transparent film which has a refractive index of 1.6 to 1.78 and a film thickness of 55 nm to 110 nm are laminated in this order is included in a plane
Data Source
AI summary
Provided is a transparent laminate which does not have a problem in which a transparent electrode pattern is visually recognized, a capacitance type input device having the transparent laminate, and an image display device provided with the capacitance type input device as a constituent element. The transparent laminate of the invention includes a region where a transparent substrate, a first transparent film having a refractive index of 1.6 to 1.78 and a film thickness of 55 nm to 110 nm, a transparent electrode pattern, and a second transparent film having a refractive index of 1.6 to 1.78 and a film thickness of 55 nm to 110 nm are laminated in this order in a plane.