Stereoscopic Display Polarization Control Plate Light Blocking
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Solution Overview
Problem
Existing stereoscopic displaying apparatuses experience cross talk issues when viewed from positions off-center, as a part of the right eye image is transmitted to the left eye due to the design of the quarter wave retarder, leading to reduced image fidelity.
Innovation Solution
Incorporating light blocking sections between the polarizing regions on the polarization axis control plate, which are strategically positioned and sized to block image light from adjacent regions, preventing cross talk by ensuring that only intended images are viewed by each eye, even when the viewer is not centered.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light blocking sections are added between polarizing regions to prevent cross talk, then image fidelity is improved, but device complexity increases
Solution Approach 1:
The polarization control plate is segmented into multiple polarizing regions (first polarizing region and second polarizing region) separated by light blocking sections. This segmentation allows independent control of light paths for different eyes while preventing cross-talk, resolving the contradiction between image fidelity and device complexity.
Solution Approach 2:
Light blocking sections are introduced as intermediary elements between adjacent polarizing regions. These sections act as mediators that block unwanted light paths and prevent cross-talk between eyes, thereby improving image fidelity without requiring complex active control mechanisms.
2Adaptability or versatility
If the viewing angle range is increased to allow off-center viewing, then adaptability is improved, but cross talk increases
Solution Approach 1:
Different regions of the polarization control plate are assigned different functions: the first polarizing region serves the right eye while the second polarizing region serves the left eye. By assigning local quality differences to different spatial regions, the system maintains proper image separation across a wider viewing angle range without increasing cross-talk.
Solution Approach 2:
The light blocking sections, which might be considered obstructions to light transmission, are actually converted into beneficial elements that selectively block harmful cross-talk light paths while allowing intended image light to pass through the appropriate polarizing regions.
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 significantly reduces cross talk rates, maintaining high image fidelity across a wider range of viewing angles, with measured cross talk rates decreasing to less than 7% within ±13.5 degrees, compared to 4% without light blocking sections.
Implementation Method 1
a polarization axis control plate including a right eye polarizing region and an adjacent left eye polarizing region on which the right eye image light and the left eye image light from the polarizing plate are incident, respectively, and from which the right eye image light and the left eye image light are emitted as linear polarized lights of which polarization axes are orthogonalized to each other
Implementation Method 2
Viewing from a position off the center line at the center of the vertical direction of the stereoscopic displaying apparatus, cross talk may occur such that a part of the right eye image generated by a liquid-crystal display panel is transmitted to the left eye of the viewer through a quarter wave retarder for the left eye
Implementation Method 3
a plurality of light blocking sections for blocking the right and left eye image light and a plurality of apertures formed between said light blocking sections and transmitting therethrough the right and left eye image light
Data Source
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AI summary
A stereoscopic displaying apparatus includes: an image generating section having a right eye image generating region on which a right eye image light is generated and a left eye image generating region on which a left eye image light is generated; a polarizing plate that emits the right eye image light and the left eye image light generated by the image generating section in the same polarizing direction; and a polarization axis control plate on which the right eye image light and the left eye image light from the polarizing plate are incident, and from which the right eye image light and the left eye image light are emitted as linear polarized lights of which polarization axes are orthogonalized to each other or circularly polarized lights of which polarization axes are rotated in the directions opposite to each other. The polarization axis control plate includes: a right eye polarizing region on which a right eye image light is incident; a left eye polarizing region which is arranged adjacent to the right eye polarizing region and on which a left eye image light is incident; a plurality of light blocking sections arranged on a plane facing the polarizing plate, each of which is a boundary between the right eye polarizing region and the left eye polarizing region that blocks the right eye image light and the left eye image light; and a plurality of apertures formed between each of the plurality of light blocking sections that transmit therethrough the right eye image light and the left eye image light. The image light emitted from one of the right eye polarizing region and the left eye polarizing region and incident on one of the plurality of apertures goes to the inside of the angle of field while the image light emitted from the other of the right eye polarizing region and the left eye polarizing region adjacent to each other and incident on the one aperture goes to the outside of the angle of field.