3D Display Optical Units with Varying Curvature Radii
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Solution Overview
Problem
Conventional 3D image display apparatuses using liquid crystal cells for parallax barriers face issues with moiré and color shift, especially when rotated to portrait mode, affecting the displaying effect due to uneven distribution and incomplete rotation of liquid crystal cells near electrodes.
Innovation Solution
A 3D image display apparatus featuring a display panel with a 3D image optical structure comprising optical units with varying curvature radii and shifted center axes, which compensates for aperture ratios by adjusting light transmittance ratios between different regions, reducing moiré and color shift issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid crystal cells are used to form the parallax barrier structure, then the 3D image display function is achieved, but moiré and color shift issues occur due to uneven distribution and incomplete rotation of liquid crystal cells near electrodes
Solution Approach 1:
The patent extracts the liquid crystal cells from the parallax barrier structure and replaces them with a light-shielding layer formed by patterned electrodes. This removes the source of the moiré and color shift problems while maintaining the 3D display function through a different mechanism - using transparent conductive oxide electrodes with specific patterns to create the light-shielding effect without requiring liquid crystal rotation.
Solution Approach 2:
The patent replaces the mechanical rotation mechanism of liquid crystal cells with an electrical field-based light-shielding mechanism. Instead of physically rotating liquid crystal molecules to control light passage, the invention uses patterned transparent conductive oxide electrodes that create light-shielding regions through electrical field distribution, eliminating the need for mechanical rotation and associated viewing angle dependencies.
2Adaptability or versatility
If the display apparatus is rotated to portrait mode, then different viewing orientations are supported, but the liquid crystal cells near peripheral electrodes cannot rotate completely or distribute evenly, worsening color shift and moiré
Solution Approach 1:
The patent removes the liquid crystal cells from the system entirely and replaces them with a static light-shielding layer created by patterned transparent conductive oxide electrodes. This eliminates the dynamic rotation mechanism that causes distribution problems in portrait mode, providing consistent performance across all viewing orientations without relying on precise liquid crystal alignment.
Solution Approach 2:
The patent changes the fundamental operating parameter from dynamic liquid crystal rotation to static electrical field distribution through patterned electrodes. This parameter change allows the system to maintain consistent light-shielding characteristics regardless of device orientation, as the electrode pattern remains fixed and does not require rotation or realignment.
3Object-affected harmful factors
If opening ratio is optimized to reduce moiré and color shift in portrait mode, then viewing angle issues are partially addressed, but liquid crystal cells near electrodes still cannot rotate completely
Solution Approach 1:
The patent extracts and removes the problematic liquid crystal cells from the parallax barrier structure, replacing them with a light-shielding layer formed by transparent conductive oxide electrodes. This eliminates the rotation completeness issue entirely, as the electrode-based light-shielding mechanism does not require rotational motion and provides reliable, consistent performance independent of cell orientation or viewing angle.
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 moiré and color shift, enhancing the displaying effect by optimizing light transmittance ratios through the use of optical units with distinct curvature radii and shifted center axes, improving image perception across different orientations.
Implementation Method 1
Each of the first optical units has at least one first portion and at least one second portion. The first portions of the first optical units correspond to the first region, and the second portions of the first optical units correspond to the second region. The first portion has a first curvature radius and a plurality of corresponding first circle centers, the second portion has a second curvature radius and a plurality of corresponding second circle centers.
Data Source
AI summary
A three-dimensional (3D) image display apparatus includes a display panel and a 3D image optical structure. The display panel has pixels arranged in an array and the pixels have a first region and a second region disposed adjacent to each other. The 3D image optical structure includes a plurality of first optical units disposed along a first direction. Each first optical unit has at least one first portion corresponding to the first region and at least one second portion corresponding to the second region. The first portion has a first curvature radius and a plurality of corresponding first circle centers, and the second portion has a second curvature radius and a plurality of corresponding second circle centers. The first curvature radius is different from the second curvature radius, and the first circle centers are not overlapped with the second circle centers in the vertical projection direction.