Slanted Lenticular Array for Uniform 3D Pixel Resolution
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Solution Overview
Problem
Auto stereoscopic display devices with lenticular lenses suffer from brightness non-uniformities due to dark zones and significant reduction in horizontal resolution compared to vertical resolution, which are not adequately addressed by existing technologies.
Innovation Solution
The design involves slanting lenticular lenses at a specific angle θ, where s = ±αp / (c² - 1), with α being the aspect ratio of 3D pixels and p the lens pitch across the pixel row direction, to create square or near-square 3D pixels, optimizing the lens pitch and slant angle to maintain aspect ratio and reduce spatial resolution uniformly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If lenticular lenses are used in auto stereoscopic display devices, then multiple views can be projected in different directions, but dark zones appear causing brightness non-uniformities
Solution Approach 1:
The patent applies asymmetry by slanting the lenticular lenses at a specific angle relative to the pixel rows. This asymmetric orientation redistributes the light paths to eliminate dark zones while maintaining multiple view capability. The slant angle is specifically designed to balance the optical paths from different pixel columns, ensuring uniform brightness across all views.
2Adaptability or versatility
If lenticular lenses are used to create multiple views, then auto stereoscopic imaging is enabled, but horizontal resolution is significantly reduced compared to vertical resolution
Solution Approach 1:
The patent changes the geometric parameters of the lenticular lenses, specifically the slant angle and pitch, to optimize the distribution of light from pixel columns. By adjusting these parameters, the patent achieves more uniform sampling across horizontal pixel columns, thereby improving horizontal resolution while maintaining the multi-view stereoscopic imaging capability.
3Illumination intensity
If lenticular lenses are slanted at an acute angle, then brightness uniformity improves, but the lens pitch and slant angle must be precisely optimized
Solution Approach 1:
The patent provides specific mathematical relationships for determining the optimal slant angle and pitch based on the display pixel configuration. By establishing these parameter relationships, the patent guides manufacturers to achieve brightness uniformity without requiring excessive trial and error, thus reducing the practical manufacturing precision burden while maintaining theoretical optimality.
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 improved brightness uniformity and balanced horizontal and vertical resolutions, enabling high-resolution auto stereoscopic displays like Super Hi-Vision with optimized 3D pixel layouts.
Implementation Method 1
Outputs from the display pixels are projected through these lenticular lenses, which function to modify the directions of the outputs
Implementation Method 2
elongate lenses configurable to focus outputs of groups of the display pixels into the plurality of views projected towards a user in different directions
Data Source
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Figure 5~6(3D)
AI summary
Autostereoscopic display device (1) comprising rows and columns of colour sub-pixels and a lenticular array (9) in registration with the display, the lenses of which being slanted with respect to the general column pixel direction in order to enable square, or near-square, 3D pixels.