Low-Reflective Conductive Layers for Borderless Display Visibility
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Solution Overview
Problem
Flip-over type display devices with thin film transistors as the viewing surface face issues with reduced visibility due to high reflectance from metal lines and electrodes, leading to a reddish color and decreased visibility at the panel's outer portions.
Innovation Solution
The implementation of conductive layers with low-reflective materials, such as combinations of metals and metal oxides, is used to reduce reflectance and improve visibility, allowing for a borderless display design by minimizing the bezel area and reducing the visibility of metal layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional metal layers (high reflectance) are used in the conductive layers, then electrical conductivity is improved, but visibility is lowered and a reddish color appears due to high reflectance
Solution Approach 1:
The conductive layer is formed as a composite structure with a first sub-conductive layer (metal or metal oxide) and a second sub-conductive layer (different metal or metal oxide) disposed on the first sub-conductive layer. This composite structure reduces reflectance and eliminates the reddish color while maintaining electrical conductivity, thereby improving visibility without sacrificing electrical performance.
2Area of stationary object
If the substrate with thin film transistors is used as the viewing surface to achieve borderless design, then bezel area is minimized, but visibility is lowered due to metal lines and electrodes being visually recognized
Solution Approach 1:
The conductive layer uses low-reflective materials that reduce reflectance across the visible spectrum, preventing the reddish coloration caused by conventional metal layers. This color control allows the conductive layer to remain visually imperceptible, enabling the substrate to serve as the viewing surface for a true borderless display design.
Solution Approach 2:
The multi-layer composite structure of the conductive layer combines materials with complementary optical and electrical properties, creating a layer that is electrically functional but visually transparent, thus enabling the borderless display design.
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 use of low-reflective conductive layers significantly reduces reflectance, improves visibility, and maintains high electrical characteristics, enabling a borderless display device with enhanced aesthetic and functional performance.
Implementation Method 1
defects due to reflection in which the conductive layers are visually recognized by a user and visibility decreases can be resolved
Data Source
AI summary
The present disclosure relates to a display device. According to the present disclosure, since conductive layers disposed on a substrate include a layer formed of a material having a low reflectance, defects in which the conductive layers are visually recognized by a user and visibility decreases can be resolved.