Stereoscopic Display Head Roll Adjustment
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Solution Overview
Problem
Conventional 3D displays lose depth sensation and cause discomfort when viewers tilt their heads due to the fixed horizontal disparity between left and right images, leading to image crosstalk and eyestrain.
Innovation Solution
A stereoscopic display system that includes a sensor to detect head roll and an image renderer to adjust disparities between the left and right images based on the viewer's head position, rotating and attenuating disparities to maintain a comfortable viewing experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the viewer relaxes their posture and views 3D images with head roll, then comfort is improved, but depth sensation is lost and image quality deteriorates
Solution Approach 1:
The system dynamically adjusts the disparity parameters of the 3D image based on the detected head roll angle. The image renderer modifies the horizontal and vertical disparities in real-time according to the viewer's head position, transforming a static disparity system into a dynamic one that adapts to changing viewing conditions.
Solution Approach 2:
The system changes the disparity parameters (horizontal and vertical offsets) of the stereoscopic image based on the detected head roll angle. By adjusting these parameters dynamically, the system maintains proper binocular correspondence even when the viewer's head is rolled, preserving depth sensation while allowing relaxed viewing postures.
2Ease of operation
If the viewer relaxes their posture with head roll, then viewing comfort is improved, but image crosstalk and eyestrain increase
Solution Approach 1:
The system applies preliminary correction to the 3D image by pre-calculating and applying compensatory vertical disparities based on the detected head roll angle. This preliminary adjustment prevents the misalignment that would otherwise cause image crosstalk and eyestrain, counteracting the harmful effects before they occur.
Solution Approach 2:
The system converts the harmful effect of head roll (which causes misalignment and crosstalk) into a beneficial adjustment opportunity. By detecting the head roll angle and applying corresponding vertical disparity corrections, the system uses the information about the harmful condition to generate the precise compensation needed, turning the problem into a solution.
3Device complexity
If fixed horizontal disparities are used in 3D displays, then image simplicity is maintained, but adaptability to different head positions is lost
Solution Approach 1:
The system transforms the static, fixed horizontal disparity approach into a dynamic system that adjusts both horizontal and vertical disparities based on detected head roll angle. This dynamic adaptation enables the display to accommodate various head positions while maintaining image quality and comfort.
Data Source
Figure 1A~1B
Figure 2A~2C
Figure 3
AI summary
A stereoscopic display includes: a sensor configured to detect head roll of a viewer; and an image renderer coupled to the sensor and configured to adjust a 3D image according to the detected head roll.