Stereoscopic Vision System Using Temporal Multiplexing
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Solution Overview
Problem
Current methods for dissociative stereoscopic vision, such as polarized or colored filters, and complex systems like I-MAX, fail to utilize the entire screen effectively, cause chromatic alterations, and do not account for correct convergence, leading to suboptimal results, especially in three-dimensional image tests.
Innovation Solution
A method involving fetching and processing right and left images, suppressing and merging columns, and alternately displaying them with synchronized shuttering of goggles' lenses to ensure each eye sees a complete image without chromatic alterations, using a system with a clock unit, image processing card, and liquid crystal goggles for high-frequency alternation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polarized or colored filters are used to dissociate between right and left eye, then each eye can see only the corresponding portion of the screen, but the portion of the screen seen by each eye is halved and overlapping of stimuli is impossible
Solution Approach 1:
The patent applies periodic action by alternately displaying images for the right and left eyes at high frequency (e.g., 120 Hz or higher). The display unit switches between right-eye images and left-eye images in rapid succession, while the goggles synchronously alternate between transmitting to the right eye and left eye. This temporal separation allows each eye to receive complete images without spatial division, resolving the contradiction between full screen utilization and eye dissociation.
2Reliability
If polarized or colored filters are used for dissociative stereoscopic vision, then stimuli can be shown to each eye, but chromatic alterations occur and results are unreliable in case of chromatic imbalance
Solution Approach 1:
The patent replaces the optical filtering mechanism (polarized or colored filters) with an electronic temporal multiplexing system. Instead of using physical filters that alter chromatic properties, the system uses rapid alternating display of right-eye and left-eye images with synchronized electronic shutters in the goggles. This substitution eliminates chromatic alterations entirely while maintaining reliable eye dissociation, as the separation is achieved through time rather than wavelength.
3Reliability
If I-MAX system with alternate projection of two image flows is used, then each eye perceives complete images, but the system is very complex and expensive
Solution Approach 1:
The patent merges the display unit and goggles into a synchronized single-channel system rather than requiring separate projection paths. The display unit alternates between right-eye and left-eye images, and the goggles synchronously alternate their transmission states. This unified approach achieves the same effect as the complex I-MAX dual-projector system but with a single display device and single goggle unit, dramatically reducing complexity and cost while maintaining complete image perception for each eye.
4Reliability
If filters are used to achieve high degree of dissociation between two eyes, then stimuli can overlap, but the stimuli are chromatically altered and results are unreliable
Solution Approach 1:
The patent uses periodic action with high-frequency alternation to achieve both complete dissociation and chromatic fidelity. By switching between right-eye and left-eye images at frequencies above the persistence of vision threshold (e.g., 120 Hz or higher), the system creates the perception of simultaneous presentation while actually delivering images sequentially. This temporal multiplexing achieves high dissociation without any chromatic alteration, as no optical filters are involved.
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
Enables full-screen image utilization, correct convergence, and reliable stereoscopic vision without chromatic issues, using affordable electronic devices, suitable for medical and cinematic applications.
Implementation Method 1
a pair of goggles with liquid crystal lenses equipped with an high-frequency circuitry to alternately shut the lenses
Data Source
Figure 1~2
AI summary
The following is a method to represent images for dissociative stereoscopic vision, which allows, by means of some simple operations on stereoscopic images, to develop a device comprising a processing card and LCD shuttering goggles, which together with a computer equipped with a graphic card with LVDS output and any image display device, enable to perform visual acuity tests on patients.