Single LCD Projector for Passive 3D via Polarization Switching
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Solution Overview
Problem
Traditional methods for displaying stereoscopic content require two separate projectors or complex setups, which are cumbersome and inefficient for providing a 3D illusion to viewers wearing passive glasses.
Innovation Solution
A single display system utilizing a liquid crystal display (LCD) integrated with a polarized filter, capable of alternately displaying stereoscopic content targeted at each eye of the viewer, using a single feed and synchronization to align polarization with the lenses of passive glasses, allowing for efficient and high-refresh-rate 3D viewing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two separate projectors are used to display stereoscopic content, then the 3D illusion for viewers wearing passive glasses is achieved, but the device complexity and cost increase
Solution Approach 1:
The patent combines two separate projectors into a single projector that can display stereoscopic content by alternately projecting left-eye and right-eye images at high refresh rates. The single projector integrates the functionality of two traditional projectors, reducing system complexity while maintaining stereoscopic display quality through rapid alternating projection synchronized with passive glasses switching.
Solution Approach 2:
The system uses periodic action by alternating between left-eye and right-eye image projection at high refresh rates (e.g., 120Hz or higher). The single projector rapidly switches between displaying images for the left eye and right eye in sequential periods, creating the stereoscopic effect when synchronized with the passive glasses that switch between polarizations at the same rate.
2Manufacturing precision
If two separate projectors are used for stereoscopic content, then each eye receives targeted images, but the system cost and setup complexity increase
Solution Approach 1:
The patent merges the image generation and projection functions into a single projector system with integrated control logic. The projector includes a processing unit that generates left-eye and right-eye images from a single feed and alternately directs them through the same projection path, eliminating the need for two separate projection systems while maintaining precise image targeting for each eye through electronic control.
Solution Approach 2:
The patent introduces an intermediary control system within the single projector that manages the alternating projection of left-eye and right-eye images. This intermediary control logic synchronizes the rapid switching of images with the passive glasses switching, ensuring each eye receives the correct targeted image without requiring two separate projectors.
3Device complexity
If a single display mechanism is used, then system complexity is reduced, but the ability to display stereoscopic content for passive glasses viewing is limited
Solution Approach 1:
The patent makes the single display mechanism dynamic by implementing rapid alternating projection of left-eye and right-eye images at high refresh rates. The projector dynamically switches between different image streams and polarization states, enabling stereoscopic content display despite using only a single display component. This dynamic operation allows the system to adapt between 2D and 3D modes as needed.
Solution Approach 2:
The system changes parameters rapidly by alternating the polarization state and image content at high refresh rates. The single projector modifies its output parameters (polarization direction, image source) in real-time to display stereoscopic content, transforming a static single-display system into a dynamic stereoscopic display capable of providing separate targeted images to each eye through passive glasses.
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 efficient and high-quality stereoscopic content display using a single system, reducing complexity and cost while maintaining a high refresh rate and clear 3D illusion for viewers wearing passive glasses.
Implementation Method 1
a liquid crystal may be provided behind the polarized filter. The liquid crystal may be capable of rotating the polarization of the light by a predetermined amount, such as 90 degrees, when a voltage is applied across the liquid crystal
Implementation Method 2
A single display system utilizing a liquid crystal display (LCD) integrated with a polarized filter
Data Source
AI summary
A single display system and method are provided for displaying stereoscopic content. In particular, a single display mechanism capable of displaying stereoscopic content for viewing with passive glasses is provided.