Buffer Layer Refractive Index Bridge for Transparent Display Clarity
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Solution Overview
Problem
Transparent displays face challenges in maintaining image clarity and brightness due to refractive index differences between layers, leading to chromaticity variations and reduced light transmission.
Innovation Solution
Incorporating a buffer layer with a higher refractive index than the substrate and lower refractive index than the insulating layer, strategically positioned between the substrate and insulating layers, to mitigate refractive index differences and minimize interference and reflection losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transparent display is constructed with multiple layers (substrate, insulating layers, wirings), then the display functionality is achieved, but refractive index differences between layers cause chromaticity variations and reduced light transmission
Solution Approach 1:
A buffer layer is introduced as an intermediary between the substrate and the first insulating layer. This buffer layer has a refractive index that is higher than the substrate and lower than the insulating layer, serving as a refractive index bridge that reduces the abrupt refractive index difference at the interface, thereby minimizing reflection and interference effects while maintaining the necessary layer structure for display functionality.
Solution Approach 2:
The refractive index parameter is strategically adjusted by introducing the buffer layer with an intermediate refractive index value. This parameter change creates a gradual transition in refractive index across the interface, reducing optical interference and improving light transmission without compromising the structural requirements of the display device.
2Stability of the object's composition
If buffer layer is added between substrate and insulating layer, then chromaticity stability and brightness are improved, but device structure becomes more complex
Solution Approach 1:
The buffer layer acts as an intermediary that stabilizes the optical properties at the substrate-insulating layer interface. By providing a gradual refractive index transition, it prevents chromaticity variations caused by interference effects, thereby improving chromaticity stability and brightness while adding only a single functional layer to the structure.
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 configuration enhances chromaticity stability and brightness by reducing refractive index-related issues, allowing for clearer image transmission through the display.
Implementation Method 1
A refractive index of the first buffer layer is higher than a refractive index of the first substrate, at an interface between the first buffer layer and the first substrate, and the refractive index of the first buffer layer is lower than a refractive index of the first insulating layer, at an interface between the first buffer layer and the first insulating layer
Data Source
AI summary
A display device includes a first substrate, a gate wiring on the first substrate, a first insulating layer on the gate wiring, a source wiring on the first insulating layer and intersecting the gate wiring, a second insulating layer on the source wiring, a pixel electrode on the second insulating layer; and a first buffer layer between the first substrate and the first insulating layer. A refractive index of the first buffer layer is higher than a refractive index of the first substrate, at an interface between the first buffer layer and the first substrate, and the refractive index of the first buffer layer is lower than a refractive index of the first insulating layer, at an interface between the first buffer layer and the first insulating layer.