3D Display Lens-Array Plate with Synchronized Shielding Pattern
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Solution Overview
Problem
Conventional 3D display technologies suffer from cross talk due to scattering and bluntness at the edge of lenses and aberration caused by different sampling point sizes at various viewing angles, leading to a poor 3D display effect.
Innovation Solution
A 3D display device with a lens-switching function, comprising a liquid-crystal-display (LCD) picture layer, a lens-array plate, and an LCD shielding pattern layer, where the shielding pattern layer is synchronized with the picture layer to alternately shield odd and even lens units, reducing the area of light transparent regions and eliminating cross talk by increasing the black shielding pattern area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a spherical lens or cylindrical lens is used in conventional 3D display, then the lens can focus light, but an aberration is generated such that sampling points at large viewing angles are greater than sampling points at small viewing angles, causing cross talk
Solution Approach 1:
The patent changes the lens shape parameter from spherical or cylindrical to a specific curved surface design where the curvature radius varies with the radial distance from the optical axis. This parameter change ensures that light rays from different viewing angles are focused at uniform sampling points, eliminating the aberration that causes cross talk while maintaining effective light focusing capability
Solution Approach 2:
The patent employs an asymmetric lens design where the curvature radius is not constant but varies with the radial distance from the optical axis. This asymmetric curvature distribution compensates for the optical path differences at various viewing angles, ensuring uniform sampling point distribution and preventing cross talk between left and right eye images
2Ease of manufacture
If the lens edge is not sharp enough in conventional 3D display, then the manufacturing is easier, but the eyes can see unnecessary lights causing cross talk phenomenon
Solution Approach 1:
The patent introduces a shielding pattern layer as an intermediary component between the lens array plate and the picture layer. This shielding layer with precisely designed black patterns blocks stray light and unnecessary light paths at the lens edges, preventing cross talk while allowing the lens itself to maintain a manufacturable design without requiring extremely sharp edges
3Object-affected harmful factors
If the area of light transparent region is reduced by adding shielding pattern, then cross talk is eliminated, but the light transparent aperture of lens unit is reduced
Solution Approach 1:
The patent applies local quality by strategically positioning the shielding pattern only in specific regions where it is most effective at blocking stray light and preventing cross talk. The shielding patterns are placed at the lens edges and in areas where light scattering occurs, while leaving the central light transmission regions open to maintain sufficient illumination intensity for clear image display
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 cross talk and aberration, enhancing the 3D display effect by ensuring that only necessary light passes through, resulting in a clearer and more focused image across different viewing angles.
Implementation Method 1
a lens-array plate... the lens-array plate having multiple lens units
Implementation Method 2
an area of a single light transparent region is smaller than an area of a single lens unit such that an edge of each lens unit corresponding to the shielding region is shielded
Data Source
AI summary
A 3D display device having a lens-switching function. The device includes an LCD picture layer, a lens-array plate, an LCD shielding pattern layer, and a synchronous picture providing system. The synchronous picture providing system is connected with the LCD picture layer and the LCD shielding pattern layer such that the LCD picture layer and the LCD shielding pattern layer are synchronous to respectively display a 3D picture and a shielded pattern. Through increasing an area of black shielding pattern, an edge of each lens unit corresponding to the shielding region is shielded, the area of a single light transparent region is reduced, and a light transparent aperture of a lens unit corresponding to the shielding region is reduced in order to eliminate a cross talk generated by scattering and bluntness at the edge.