Solar Module Print Layer Transparency for Rear-Side Visibility
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Solution Overview
Problem
Existing solar cell modules lack optimal design properties and power generation performance, particularly when printing is performed on the light-receiving surface side, which affects visibility and efficiency.
Innovation Solution
A solar cell module configuration with a print layer formed further toward the light-receiving surface side, utilizing specific transparencies and color printing techniques, ensuring spectral sensitivity integral ratios meet predefined conditions to maintain visibility and enhance power generation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If printing is performed on the light-receiving surface side of the solar cell module, then design properties are improved, but power generation performance deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the transparency of the print layer and the spectral sensitivity integral ratio. By adjusting these parameters, the print layer allows sufficient light transmission to maintain power generation performance (short circuit current ratio of 0.6 or more) while achieving the desired design properties and visibility through the rear surface side.
Solution Approach 2:
The patent applies local quality by forming the print layer only in specific regions rather than uniformly across the entire solar cell module. This selective printing approach allows design properties to be enhanced in designated areas while preserving light transmission and power generation performance in other regions.
2Illumination intensity
If printing is performed with high transparency to maintain power generation performance, then visibility through the rear surface side is improved, but design properties deteriorate
Solution Approach 1:
The patent resolves this contradiction by changing the transparency parameter to an optimal range that balances both visibility and design properties. The transparency is controlled to allow sufficient light transmission for visibility while maintaining enough opacity to achieve the desired design effect, coupled with controlling the spectral sensitivity integral ratio to ensure power generation performance.
Solution Approach 2:
The patent applies composite materials by combining the print layer with the solar cell module structure in a way that achieves multiple functions simultaneously. The print layer is formulated and positioned to provide both aesthetic design properties and adequate light transmission, creating a composite structure that balances visual and functional requirements.
3Shape
If whole surface printing is performed to enhance design properties, then aesthetic appeal is improved, but short circuit current ratio decreases below 0.6
Solution Approach 1:
The patent applies local quality by performing printing only in specific regions rather than across the entire surface. This selective approach allows design properties to be enhanced in designated areas while preserving sufficient light transmission in other regions to maintain the short circuit current ratio at 0.6 or more.
Solution Approach 2:
The patent applies parameter changes by controlling the transparency and spectral sensitivity integral ratio of the print layer. These parameter adjustments ensure that even when printing is performed, the light transmission characteristics are optimized to maintain power generation performance while achieving the desired design properties.
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 configuration achieves excellent design properties with visibility through the rear surface side while maintaining a short circuit current ratio of 0.6 or more, enhancing both aesthetic appeal and power generation efficiency.
Implementation Method 1
a print layer formed further toward a light-receiving surface side than a solar cell module body by printing with a specific transparency
Implementation Method 2
solar cell module body; Quantum efficiency IPCE
Data Source
AI summary
A printing data generation device generates printing data for printing only one part of a specific image in a solar cell module. The solar cell module includes a solar cell module body and a print layer that is formed further toward a light-receiving surface side than the solar cell module body by printing with a specific transparency in a specific region. A rear surface side is visible from the light-receiving surface side in at least part of the specific region. The specific transparency is set such that a condition A is satisfied, the condition A being that a spectral sensitivity integral ratio A defined by formula (1), shown below, is not less than 0.6 when printing is performed with a transparency resulting in a short circuit current ratio of 0.6,A=∫ 360 830(f(λ)) dλ∫ 360 830(fSC(λ)) dλFormula (1)