Laminated Wiring Antireflection for Outdoor Display Visibility
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Solution Overview
Problem
Outdoor displays face challenges in achieving favorable visibility due to high reflectance of aluminum alloy wiring, which causes incident light to reflect off the conductive film surfaces, compromising display characteristics.
Innovation Solution
The use of laminated wiring structures comprising a conductive film, a transparent film, and a translucent film, along with an insulating film, to suppress light reflection, enhancing visibility by employing a specific layering arrangement and materials like IZO and Mo films to manage optical path lengths and refractive indices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aluminum alloy is used for wiring to achieve low resistance and ease of manufacture, then electrical conductivity and manufacturing ease are improved, but light reflectance increases causing poor display visibility
Solution Approach 1:
The patent applies composite materials by creating a laminated wiring structure consisting of a conductive film (aluminum alloy) combined with a translucent film and a transparent film. This composite structure maintains the electrical conductivity of the aluminum alloy while the translucent and transparent films form an antireflection coating that reduces light reflectance, thereby resolving the contradiction between electrical performance and optical performance.
Solution Approach 2:
The translucent film and transparent film act as intermediary layers between the conductive film and the external environment. These intermediary films serve as an antireflection coating that mediates the interaction between incident light and the conductive film, reducing reflectance while allowing the conductive film to maintain its electrical function underneath.
2Ease of manufacture
If aluminum alloy wiring is used to simplify manufacturing, then ease of manufacture is improved, but display visibility in outdoor conditions deteriorates
Solution Approach 1:
The laminated wiring structure combines multiple materials (conductive film, translucent film, transparent film) where each layer contributes specific properties. The conductive film provides ease of manufacture and electrical conductivity, while the translucent and transparent films provide antireflection properties that enhance display visibility in bright outdoor conditions without significantly complicating the manufacturing process.
Solution Approach 2:
The invention applies local quality by giving different parts of the wiring structure different functions: the conductive film layer provides electrical conductivity and manufacturing ease, while the translucent and transparent film layers provide optical properties (antireflection) specifically at the surface exposed to light, thereby enhancing visibility without compromising manufacturing simplicity.
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
This solution effectively reduces light reflection from the conductive film surfaces, improving display visibility even in bright outdoor conditions by utilizing optical interference effects and appropriate film thicknesses and materials, resulting in a more effective display with reduced glare.
Implementation Method 1
The aforementioned display includes the laminated wiring and the wiring terminal part each including the translucent film and the transparent film laminated on the conductive film. This suppresses reflection of light from a surface of the conductive film, thereby obtaining a display with excellent visibility.
Data Source
AI summary
A display includes: a laminated wiring with a conductive film arranged on a foundation layer, and a transparent film and a translucent film arranged on the conductive film; a wiring terminal part arranged at an edge portion of the laminated wiring and having the same laminated structure as that of the laminated wiring; and an insulating film that covers the laminated wiring and the wiring terminal part.