Nanostructure Array Diffractive Optics for Motion Display
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Solution Overview
Problem
Current optical security and motion displays lack the ability to create high-resolution, animated images using nanostructure arrays that can be efficiently manufactured and utilized to provide secure and visually authenticating features.
Innovation Solution
The implementation of multiple nanostructure arrays oriented at differing relative angles of rotation on a single substrate layer, allowing for the creation of motion and animation displays that diffract light at specific angles, enabling selective viewability of image frames and providing enhanced chromatic resolution and security features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple nanostructure arrays are formed on a single substrate layer to create motion displays, then chromatic resolution and image quality are improved, but manufacturing complexity increases
Solution Approach 1:
The display is divided into multiple nanostructure arrays, with each array corresponding to a specific frame of the animation. Each nanostructure array is oriented at a different rotation angle to diffract light at specific angles, enabling selective viewability of individual frames. This segmentation allows high-resolution chromatic display while maintaining manageable manufacturing through modular design
Solution Approach 2:
The patent introduces angular orientation as an additional dimension for encoding information. By rotating nanostructure arrays at different angles relative to each other on the same substrate plane, multiple frames are encoded in the angular domain. This allows multiple high-resolution images to coexist on a single substrate without increasing area, resolving the contradiction between image quality and manufacturing complexity
2Adaptability or versatility
If nanostructure arrays are oriented at differing rotation angles for multiple frames, then motion display capability is improved, but alignment precision requirements increase
Solution Approach 1:
Reference markers are incorporated into the substrate before the nanostructure arrays are formed. These pre-established reference markers provide alignment guides that enable precise angular positioning of subsequent nanostructure arrays. By performing this alignment preparation in advance, the patent achieves high angular precision without requiring complex real-time alignment procedures during manufacturing
Solution Approach 2:
The reference markers act as intermediary elements between the substrate and the nanostructure arrays. These markers serve as a common reference framework that mediates the angular positioning process, allowing different nanostructure arrays to be precisely oriented relative to each other through a standardized intermediate reference system rather than direct pairwise alignment
3Illumination intensity
If diffraction gratings with smaller spacing are used to increase intensity, then brightness is improved, but manufacturing difficulty increases
Solution Approach 1:
The patent systematically varies multiple parameters of the nanostructure arrays, including spacing, size, shape, and rotation angle, to optimize both brightness and manufacturability. By changing these parameters across different arrays rather than relying solely on minimal spacing, the patent achieves high intensity displays while maintaining manufacturing feasibility through parameter optimization rather than extreme miniaturization
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 approach results in high-resolution, animated images that can be used for optical security devices, offering improved visual authentication and motion effects, with the ability to control the viewable angle of individual frames, making it suitable for secure applications.
Implementation Method 1
multiple nanostructure arrays oriented at differing relative angles of rotation corresponding to multiple frames of an animation image... each nanostructure array diffracting light at a specific angle
Data Source
AI summary
A motion and animation display is disclosed, including multiple nanostructure arrays oriented at differing relative angles of rotation corresponding to multiple frames of an animation image, wherein the multiple nanostructure arrays are formed on a single substrate layer. An optical display device is also disclosed, including a substrate having a surface, a first frame of an animated image comprising a first optical sub-wavelength nanostructure array formed on or in the surface of the substrate, and a second frame of an animated image comprising a second optical sub-wavelength nanostructure array formed on or in the surface of the substrate, where the second nanostructure array is rotated relative to the first nanostructure array by a first relative angle of rotation. A method of manufacturing a motion and animation display comprising multiple nanostructure arrays oriented at differing relative angles of rotation is also disclosed.