Textured Display Panel Structure for Low-Reflectivity Solar Layers
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Solution Overview
Problem
Current display technologies face challenges in reducing reflection efficiency due to a large width-depth ratio of textured holes in PIN cell film layers, which limits the effectiveness of reflectivity reduction and increases the thickness of the display screen module.
Innovation Solution
A display panel design featuring a base substrate with an organic functional film layer, an insulating layer with pits, and an amorphous silicon solar cell film layer that replicates the morphology of the insulating layer's textured surface, achieving a smaller width-depth ratio for improved reflectivity reduction and photoelectric conversion efficiency without the need for a circular polarizer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If punching and texturing are performed on the lower electrode of a PIN cell to reduce reflectivity, then the solar cell film layer structure is created, but the metal thickness is limited and the width-depth ratio of the textured hole becomes too large, resulting in poor reflectivity reduction effect
Solution Approach 1:
Instead of texturing the lower electrode (traditional approach), this patent inverts the texturing process by forming pits on the upper electrode (ITO layer) of the solar cell film layer. This inversion allows for better control of the width-depth ratio and achieves superior reflectivity reduction. The pits are formed through a multi-step process: depositing a patterned resist layer, performing selective etching to create pit structures, and then removing the resist layer, resulting in controlled pit dimensions with optimal width-depth ratios.
Solution Approach 2:
The patent changes the key parameters of the texturing process by transitioning from lower electrode texturing to upper electrode texturing. This parameter change enables precise control over pit depth and width, achieving a width-depth ratio that is significantly improved compared to traditional methods. The controlled pit parameters (depth, width, and distribution) directly enhance the reflectivity reduction effect while maintaining manufacturing feasibility.
2Object-affected harmful factors
If a circular polarizer is used to reduce reflection, then the display screen module thickness increases, but the reflectivity reduction effect is achieved
Solution Approach 1:
The patent extracts and eliminates the circular polarizer component from the display screen module by replacing its function with the pit structure on the upper electrode. The pit structure directly reduces reflectivity through its geometric properties (controlled width-depth ratio and periodic distribution), making the circular polarizer redundant. This extraction not only reduces reflectivity but also decreases the overall module thickness by removing an unnecessary component layer.
Solution Approach 2:
The upper electrode with pit structures serves multiple functions: it acts as both the electrical contact layer and the anti-reflection texturing layer. This multi-functionality eliminates the need for separate circular polarizer components, thereby reducing the display screen module thickness while maintaining effective reflectivity reduction. The pit structure integrates optical and electrical functions in a single layer.
3Length of moving object
If the metal thickness of the lower electrode is increased to improve punching depth, then the width of the punching increases, but the width-depth ratio remains too large
Solution Approach 1:
The patent inverts the texturing location from the lower electrode to the upper electrode, which fundamentally changes the geometric constraints. By texturing the upper electrode (ITO layer), the process achieves much better control over the width-depth ratio. The inversion allows for deeper pits relative to their width because the etching process from the top enables precise depth control while maintaining narrow openings, thus achieving optimal width-depth ratios for reflectivity reduction.
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 effectively reduces reflectivity and enhances photoelectric conversion efficiency by creating a textured surface with a small width-depth ratio, thereby minimizing the thickness of the display panel and improving the overall performance of the solar cell film layer.
Implementation Method 1
an amorphous silicon solar cell film layer disposed on the side, facing away from the organic functional film layer, of the insulating layer
Data Source
AI summary
Disclosed in embodiments of the present disclosure are a display panel and a manufacturing method therefor, and a display apparatus. The display panel includes: a base substrate; an organic functional film layer provided on the base substrate; an insulating layer provided on the organic functional film layer, a plurality of dents distributed at intervals are provided on one side of the insulating layer distant from the organic functional film layer; and an amorphous silicon solar cell film layer provided at one side of the insulating layer distant from the organic functional film layer, the amorphous silicon solar cell film layer has the same morphology as the surface of the insulating layer where the dents are provided.