Reflective Structures in 3D Display Substrates to Reduce Moiré
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Solution Overview
Problem
Existing glasses-free 3D display technologies face challenges in achieving high-definition, high-brightness, and high-contrast displays due to low resolution and moiré issues caused by large etching gaps between sub-anodes.
Innovation Solution
A display substrate is designed with a base substrate having sub-pixels with stacked transparent and reflective conductive portions, insulation layers, and reflective structures. The reflective structures include overlapping portions with the electrodes, optimizing microcavity gain and reducing moiré effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If large etching gaps are used between sub-anodes, then manufacturing is easier, but moiré effects increase and display resolution deteriorates
Solution Approach 1:
The patent introduces a reflective structure as an intermediary element positioned between adjacent sub-pixels. This reflective structure mediates the optical interaction between sub-pixels, redirecting light to reduce moiré effects while allowing larger etching gaps for easier manufacturing. The reflective structure acts as a buffer that maintains display quality without requiring precise tight spacing.
2Manufacturing precision
If the number of sub-pixels is increased for higher resolution, then display quality improves, but device complexity increases
Solution Approach 1:
The reflective structure serves multiple functions simultaneously: it acts as a light reflector to enhance brightness, a moiré reduction element to improve display quality, and a structural component that simplifies the overall device design. By consolidating these functions into a single element, the patent achieves high resolution without proportionally increasing device complexity.
3Illumination intensity
If insulation layer thickness is adjusted for optimal microcavity gain, then light-emitting brightness improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent optimizes the insulation layer thickness to a specific parameter range (50-200 nm) to achieve optimal microcavity gain. By establishing this specific parameter range, the patent balances brightness enhancement with manufacturability - thick enough to provide sufficient insulation and optical cavity effect, but thin enough to be controllable with standard manufacturing processes.
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 improves light-emitting brightness and reduces moiré issues, enhancing the 3D display resolution and viewing experience by increasing the number of individually controlled sub-pixels and adjusting the thickness of the insulation layer for optimal microcavity gain.
Implementation Method 1
a plurality of reflective structures, located between the insulation layer and the base substrate... the reflective structure includes a first portion and a second portion... an orthographic projection of the first portion on the base substrate and an orthographic projection of one of the two adjacent first electrodes on the base substrate have an overlap area
Data Source
AI summary
Disclosed are a display substrate and a manufacturing method thereof. The display substrate includes: a base substrate; multiple first electrodes on the base substrate, where each of the multiple first electrodes includes a transparent conductive portion and a reflective conductive portion; a light-emitting function layer on a side of the multiple first electrodes facing away from the base substrate; an insulation layer between a layer where the multiple first electrodes are located and the base substrate; and multiple reflective structures between the insulation layer and the base substrate. Two adjacent first electrodes are correspondingly provided with one of the multiple reflective structures. The one of the multiple reflective structures includes a first portion and a second portion, an orthographic projection of the first portion on the base substrate and an orthographic projection of one of the two adjacent first electrodes on the base substrate have an overlap area.