Lenticular 3D Display Device Without Transparent Substrate
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Solution Overview
Problem
Current lenticular print three-dimensional image display devices require precise alignment and a transparent plastic sheet with specific thickness, making them costly, heavy, and difficult to produce, especially for partial page applications where the entire page cannot be in lenticular form.
Innovation Solution
A method involving two curable coating compositions applied directly on the interlaced image, where the first composition has a surface tension of less than 32 dynes/cm2 and the second composition has a liquid surface tension greater than 34 dynes/cm2, allowing self-registration and forming lenticular lenses without a transparent sheet, enabling flexible and efficient production of three-dimensional image displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transparent plastic sheet with specific thickness is used as a substrate for lenticular lenses, then the structural stability and optical performance are improved, but the device becomes heavier, more costly, and requires precise alignment
Solution Approach 1:
The invention extracts and eliminates the transparent plastic sheet substrate from the lenticular display structure. Instead of forming lenses on a separate substrate, the lenticular lenses are formed directly on the printed circuit board carrier, removing the need for the transparent sheet and its associated alignment requirements while maintaining structural integrity
Solution Approach 2:
The invention merges the substrate function and lenticular lens function into a single integrated structure. The printed circuit board carrier serves dual purposes as both the structural substrate and the base for forming lenticular lenses, eliminating the need for a separate transparent sheet and reducing overall device complexity
2Reliability
If a transparent plastic sheet with specific thickness is used as a substrate for lenticular lenses, then the structural stability is improved, but the production complexity and cost increase due to precise alignment requirements
Solution Approach 1:
The invention extracts and eliminates the transparent plastic sheet substrate from the lenticular display structure. Instead of forming lenses on a separate substrate, the lenticular lenses are formed directly on the printed circuit board carrier, removing the need for the transparent sheet and its associated alignment requirements while maintaining structural integrity
Solution Approach 2:
The invention employs self-alignment mechanisms where the lenticular lens pattern is directly registered with the underlying image elements during the formation process. The coating composition self-registers into patterns that do not overlap with the first pattern, eliminating the need for complex external alignment equipment and procedures
3Length of stationary object
If conventional extrusion process is used to form lenticular lenses, then the lens material thickness can be controlled, but the production flexibility and adaptability are limited
Solution Approach 1:
The invention replaces the mechanical extrusion process with a coating and curing system. Instead of mechanically extruding lens material to specific thicknesses, the invention applies curable coating compositions that are then cured to form lenticular lenses, allowing for greater flexibility in production and easier adaptation to different design requirements
Solution Approach 2:
The invention changes the fundamental parameter control mechanism from mechanical thickness control during extrusion to chemical curing control. By adjusting coating composition, application thickness, and curing parameters, the system achieves lens formation with greater flexibility and adaptability compared to fixed extrusion 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
This method allows for the creation of lenticular lenses that are in registration with the interlaced image, providing a flexible and cost-effective solution for producing three-dimensional image displays without the need for a transparent sheet, reducing production costs and complexity.
Implementation Method 1
The second curable coating composition has a liquid surface tension greater than at least 2 dynes/cm2, as measured by ASTM D1084, than the surface tension of the cured first curable coating composition, as measured by ASTM D7490-08
Implementation Method 2
The first curable coating composition comprises (i) at least one acrylate monomer, (ii) an acrylate oligomer with a backbone that comprises one or more groups selected from epoxy, polyester, urethane, acrylic and silicone, (iii) a photoinitiator
Data Source
AI summary
The invention provides a lenticular lens type three-dimensional image display device and a method of fabricating the device without a need for a clear plastic substrate transposed between the image and lenticular lenses. The device can be obtained by directly printing curable coatings onto the image, making them particularly well suited for volume production. The combination the image printing and application of curable coatings process can be joined together to conduct the single pass-process. The single pass-process allows for flexibility of the printing only selective areas of the substrate. Moreover, this process allows the device to be recyclable.