Decorative Sheet Transmitting Portions for Clear Images and Moiré Control
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Solution Overview
Problem
Existing decorative sheets for display devices, such as those described in Patent Literature 2, do not effectively enhance the visibility of complex picture patterns like wood grain or marble textures while maintaining image clarity, especially when used with dot matrix displays.
Innovation Solution
A decorative sheet with a picture pattern portion and transmitting portions having an aperture ratio of 5% to 50% and a distance between adjacent transmitting portions of 40 µm to 140 µm, featuring a transparent material with a refractive index close to the base material, arranged in a grid pattern to optimize visibility and image transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the spacing between holes in a colored front panel is made smaller than the pixel size to ensure image clarity, then image quality is improved, but the visibility of the decorative picture pattern deteriorates
Solution Approach 1:
The patent applies local quality by creating different functional zones within the decorative sheet: transmitting portions with specific spacing for image clarity and picture pattern portions with appropriate spacing for decorative visibility. The transmitting portions are strategically positioned to allow image light passage while the picture pattern portions maintain decorative integrity, resolving the contradiction between image quality and pattern visibility.
Solution Approach 2:
The decorative sheet is segmented into distinct transmitting portions and picture pattern portions. This segmentation allows each region to serve its specific function optimally - the transmitting portions with controlled spacing ensure image clarity while the picture pattern portions with their own spacing characteristics maintain decorative visibility, thereby solving the contradiction.
2Loss of information
If the aperture ratio is increased to improve picture pattern visibility, then decorative visibility is improved, but image brightness and clarity deteriorate
Solution Approach 1:
The patent applies local quality by creating different functional zones within the decorative sheet: transmitting portions with specific spacing for image clarity and picture pattern portions with appropriate spacing for decorative visibility. The transmitting portions are strategically positioned to allow image light passage while the picture pattern portions maintain decorative integrity, resolving the contradiction between image quality and pattern visibility.
Solution Approach 2:
The decorative sheet is segmented into distinct transmitting portions and picture pattern portions. This segmentation allows each region to serve its specific function optimally - the transmitting portions with controlled spacing ensure image clarity while the picture pattern portions with their own spacing characteristics maintain decorative visibility, thereby solving the contradiction.
3Area of stationary object
If transmitting portions are placed closer together to reduce overall size, then device compactness is improved, but moiré patterns and image degradation occur
Solution Approach 1:
The patent applies parameter changes by precisely controlling the spacing between transmitting portions within the range of 40-140 µm and maintaining the aperture ratio between 5%-50%. This optimized parameter range allows the decorative sheet to maintain compactness while preventing moiré patterns and image degradation, resolving the contradiction between size and image quality.
Solution Approach 2:
The patent converts the potential harm of closely spaced transmitting portions (which would cause moiré patterns) into a benefit by optimizing the spacing to 40-140 µm. This optimized spacing, combined with the aperture ratio control, actually prevents moiré patterns while maintaining compactness, turning a potential problem into a solution.
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 enhances the visibility of the decorative sheet's picture pattern and maintains clear image transmission by preventing image degradation and moiré patterns, ensuring sharp detail observation and sufficient brightness.
Implementation Method 1
each of the transmitting portions may be formed of a transparent material having a refractive index of ±0.2 of a refractive index of the base material portion
Data Source
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AI summary
To provide a decorative sheet, a display device with a decorative sheet, and a display device with a panel that are excellent in visibility of a picture pattern of the decorative sheet. The decorative sheet 50 includes the picture pattern portion 53 and a plurality of the transmitting portions 57 that are portions in which the picture pattern portion 53 is not formed, an aperture ratio is 5% or more and 50% or less, and each of the transmitting portions 57 is formed such that a distance between the transmitting portions 57 adjacent to each other is 40 µm or more.