3D Display Calibration Using Viewer Perception Offsets
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Solution Overview
Problem
Existing three-dimensional display systems fail to account for individual variations in human vision, leading to discrepancies between perceived and ideal positions, causing discomfort, disorientation, and reduced usability due to anatomical and positional differences in viewer's eyes and display configuration.
Innovation Solution
A method and apparatus for calibrating three-dimensional display systems by sensing a viewer's apparent position and determining adjustments to align the displayed entities with their actual perceived position, using a processor to apply corrections based on viewer indications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a standardized stereo display configuration is used, then device complexity is reduced and ease of manufacture is improved, but manufacturing precision deteriorates because individual viewer variations are not accommodated
Solution Approach 1:
The system dynamically adjusts display parameters (image position, timing, content) based on measured viewer parameters such as inter-pupillary distance and eye position, transforming a static standardized display into an adaptive system that compensates for individual variations
Solution Approach 2:
The system performs preliminary measurement of viewer-specific parameters before displaying content, using these measurements to pre-calculate and apply the appropriate adjustments to the display configuration
2Manufacturing precision
If individual calibration for each viewer is implemented, then manufacturing precision is improved by accommodating viewer variations, but device complexity increases due to additional sensing and processing requirements
Solution Approach 1:
The display system integrates multiple functions into a single apparatus: it serves as both the content display device and the measurement instrument, using the display itself or integrated sensors to measure viewer parameters and then apply corrections
Solution Approach 2:
The system implements a closed-loop feedback mechanism where viewer parameters are continuously measured, the display configuration is adjusted based on these measurements, and the process can be iterated to achieve optimal alignment
3Manufacturing precision
If display content is adjusted to match perceived position, then manufacturing precision is improved, but loss of time increases due to calibration measurements and adjustments
Solution Approach 1:
The system performs calibration measurements before content display, so that when content is presented, the adjustments are already in place, minimizing the time impact during actual usage
Solution Approach 2:
The system automatically performs measurements and applies adjustments without requiring manual intervention or complex user setup procedures, reducing the time burden on the viewer
4Adaptability or versatility
If multiple access paths to a single hardware data stream are implemented, then adaptability is improved by allowing sequential and simultaneous access, but device complexity increases due to access management requirements
Solution Approach 1:
The system dynamically switches between different access modes (sequential for calibration, simultaneous for content display) based on operational requirements, allowing flexible resource utilization without permanent complex infrastructure
Data Source
AI summary
A target is outputted to an ideal position in 3D space. A viewer indicates the apparent position of the target, and the indication is sensed. An offset between the ideal and apparent positions is determined, and an adjustment determined from the offset such that the apparent position of the ideal position with the adjustment matches the ideal position without the adjustment. The adjustment is made to the first entity and/or a second entity, such that the entities appear to the viewer in the ideal position. The indication may be monocular with a separate indication for each eye, or binocular with a single viewer indication for both eyes. The indication also may serve as communication, such as a PIN input, so that calibration is transparent to the viewer. The method may be continuous, intermittent, or otherwise ongoing over time.