Hexagonal Grid Autostereoscopic Display for Rotatable 3D Viewing
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Solution Overview
Problem
Existing autostereoscopic display devices struggle to provide a rotatable multi-view 3D experience as they are limited by fixed lenticular arrangements, which do not allow for effective autostereoscopic viewing in different orientations, especially in portrait and landscape modes common in handheld devices like tablets and mobile phones.
Innovation Solution
The solution involves a hexagonal grid for both the display panel and the view forming lens arrangement, with specific selection of basic translation vectors and circular regions in the vector space to exclude areas that cause banding, enabling a dynamic and effective autostereoscopic display capable of rotating between different viewing modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed lenticular arrangement is used, then the display can provide autostereoscopic viewing in a specific orientation, but it cannot effectively provide autostereoscopic viewing in different orientations (portrait and landscape modes)
Solution Approach 1:
The patent applies the dynamics principle by making the lenticular arrangement rotatable relative to the display panel, allowing the lens array to change its orientation dynamically. This enables the display to adapt to different viewing orientations (portrait and landscape modes) while maintaining effective autostereoscopic viewing, resolving the contradiction between viewing adaptability and device complexity.
2Object-affected harmful factors
If a hexagonal grid arrangement is used for pixels and lenses, then banding performance is improved, but the manufacturing precision requirements increase due to specific vector selection constraints
Solution Approach 1:
The patent applies parameter changes by defining specific constraints on the basic translation vectors (a, b) of the hexagonal grid, where the aspect ratio of the shorter to the longer vector must be between 0.66 and 1. This parameter specification optimizes the geometric relationship between pixels and lenses to reduce banding effects while providing clear manufacturing guidelines, balancing banding performance with manufacturability.
3Adaptability or versatility
If each lenticular lens is associated with only two columns of display sub-pixels, then a single stereoscopic image can be observed, but multiple successive stereoscopic views and look-around impression cannot be provided
Solution Approach 1:
The patent applies segmentation by associating each lenticular lens with multiple groups of display sub-pixels (three or more adjacent columns) instead of just two columns. This divides the sub-pixel information into multiple vertical slices, each corresponding to different viewing angles, enabling the display to provide multiple successive stereoscopic views and look-around impressions while maintaining ease of operation through the lens array's optical guidance.
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 allows for improved banding performance and effective multi-view autostereoscopic 3D displays that can operate in both portrait and landscape modes without the banding issues, enhancing the usability of portable devices.
Implementation Method 1
a view forming arrangement comprising an array of lens elements, positioned over the display panel, for directing the light from different pixels or sub-pixels to different spatial locations
Data Source
AI summary
An autostereoscopic display comprises a pixelated display panel comprising an array of single color pixels or an array of sub-pixels of different colors and a view forming arrangement comprising an array of lens elements. The pixels form a hexagonal grid, and the lenses also repeat in a hexagonal grid. A vector p is defined which relates to a mapping between the pixel grid and the lens grid. Regions in the two dimensional space for this vector p are identified which give good or poor banding performance, and the better banding performance regions are selected.