Flexible Touch Panel Transparent Conductive Oxide Layers Signal Delay
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Solution Overview
Problem
Flexible touch panels face issues with signal delay, visual recognition, and stress-induced damage due to the limitations of existing touch sensor units, particularly in flexible substrates with metal mesh or silver nanowire configurations.
Innovation Solution
A flexible touch panel design incorporating a touch sensor unit with a transparent conductive layer and sequentially deposited first and second transparent conductive oxide layers, which are patterned to form sensing electrodes and connection portions, minimizing signal delay and visual recognition while dispersing stress through metal mesh or nanowire structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a metal mesh or silver nanowire configuration is used for the touch sensor unit, then flexibility is improved, but signal delay increases and visual recognition occurs
Solution Approach 1:
The patent uses a composite structure combining transparent conductive oxide layers (ITO, IZO, or ZnO) with metal mesh or silver nanowire patterns. The transparent conductive oxide layers serve as the primary signal transmission path, while the metal mesh or nanowires provide additional conductivity and flexibility. This composite approach reduces signal delay compared to using only metal mesh or nanowires, while maintaining flexibility and reducing visual recognition through the transparency of the oxide layers.
2Adaptability or versatility
If a metal mesh or silver nanowire configuration is used for the touch sensor unit, then flexibility is improved, but visual recognition increases
Solution Approach 1:
The patent implements local quality by using transparent conductive oxide layers with varying transparency characteristics in different regions. The oxide layers are deposited to control their thickness and optical properties, allowing light to pass through while maintaining electrical conductivity. This local optimization of transparency reduces visual recognition of the touch sensor unit while preserving flexibility through the transparent material structure.
3Ease of manufacture
If existing touch sensor unit structures are used on flexible substrates, then manufacturing simplicity is maintained, but stress-induced damage increases
Solution Approach 1:
The patent segments the touch sensor unit into multiple functional layers: transparent conductive oxide layers, metal mesh or silver nanowire patterns, and protective structures. Each layer is optimized to handle stress independently - the oxide layers provide a flexible baseline structure, while the metal mesh or nanowires are arranged to accommodate bending stresses. This segmentation allows the structure to maintain manufacturing simplicity while significantly improving resistance to stress-induced damage.
4Loss of time
If transparent conductive oxide layers are sequentially deposited to reduce signal delay, then manufacturing complexity increases
Solution Approach 1:
The patent merges the deposition of transparent conductive oxide layers with the existing manufacturing process for metal mesh or silver nanowire patterns. The oxide layers are deposited using standard sputtering or chemical vapor deposition techniques that are already integrated into flexible substrate processing lines. By combining these deposition steps with existing patterning and metallization processes, the manufacturing complexity is minimized while achieving the signal delay reduction benefits of multiple oxide 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 inhibits signal delay, suppresses visual recognition of the touch sensor unit, and prevents damage from stress, enhancing the overall flexibility and durability of the touch panel.
Implementation Method 1
a transparent conductive layer, a first transparent conductive oxide layer, and a second transparent conductive oxide layer that are sequentially deposited
Data Source
AI summary
A flexible touch panel includes a touch sensor unit disposed on a flexible substrate. The flexible touch panel includes a transparent conductive layer, a first transparent conductive oxide layer, and a second transparent conductive oxide layer that are sequentially deposited and sequentially contact each other.