Autostereoscopic 3D Display Using Single Projector and Mirror Arrangement
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Solution Overview
Problem
Current 3D display technologies either require specialized glasses or are costly due to the use of multiple projectors, lacking a cost-effective solution for displaying 3D images without glasses.
Innovation Solution
An autostereoscopic display system utilizing a single projector and a fixed mirror arrangement to project images onto a holographic diffuser from distinct directions, allowing a 3D image to be perceived without the need for glasses, with the option of using either simultaneous or time-multiplexed projection methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple projectors are used to display 3D images without glasses, then the 3D display quality is improved, but the cost and device complexity increase
Solution Approach 1:
The patent divides the projection function into multiple virtual projectors created by a single physical projector working with a mirror arrangement. Each mirror reflects light to create a distinct virtual projector position, achieving the effect of multiple projectors without the actual hardware complexity and cost associated with using multiple physical projectors.
2Device complexity
If a single projector is used to reduce cost, then the device complexity is reduced, but the ability to display 3D images without glasses deteriorates
Solution Approach 1:
The patent introduces a mirror arrangement as an intermediary between the single physical projector and the display medium. This mirror arrangement creates multiple virtual projector positions, enabling the single projector to produce the optical effects of multiple projectors and achieve proper 3D image display without glasses.
3Adaptability or versatility
If multiple projectors are positioned at different locations, then the viewing perspectives are improved, but the device complexity and cost increase
Solution Approach 1:
The patent creates virtual copies of projectors through the mirror arrangement. Each mirror generates a virtual projector image at a different position and angle, providing multiple viewing perspectives equivalent to having multiple physical projectors located at different positions, but without the associated complexity and cost.
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
This configuration provides a cost-effective and simple method to display 3D images, allowing for flexible viewing positions and perspectives, while maintaining high image resolution and aspect ratio, and enabling a rear projection design.
Implementation Method 1
The mirror arrangement is configured to reflect the plurality of projected images onto the holographic diffuser from distinct directions
Implementation Method 2
The holographic diffuser is configured to display the plurality of projected images projected by the single projector
Data Source
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AI summary
An autostereoscopic display (10) configured to display (10) a three dimensional (3D) image of a scene. The autostereoscopic display (10) uses a single projector (12) to project a plurality of projected images (14a, 14b, 14c) into a mirror arrangement (26) fixedly positioned in the projection field (16) of the single projector (12) to reflect the plurality of projected images (14a, 14b, 14c) onto the holographic diffuser (24) from distinct directions such that a 3D image is perceived by a person (18) viewing the holographic diffuser (24).