Rotating Stereoscopic Display With Region-Specific Emission Angles
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Solution Overview
Problem
Existing stereoscopic display methods using a rotating flat-plate-shaped screen suffer from reduced image quality near the rotational axis and require a large projection distance, leading to a larger apparatus size.
Innovation Solution
An image display apparatus with an irradiation target, rotational mechanism, emitter, and control section, where image light is emitted at different angles and synchronized with the rotation of the target to achieve stereoscopic display without a central rotational mechanism, allowing for a compact design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flat-plate-shaped screen is rotated to perform stereoscopic display, then stereoscopic display capability is achieved, but image quality degrades near the rotational axis and apparatus size increases
Solution Approach 1:
The screen is divided into multiple regions (first region, second region, third region) with different emission angle characteristics. The first region emits light at a first emission angle, the second region at a second emission angle, and the third region at a third emission angle. This local differentiation of optical properties ensures that each region optimally directs light to its corresponding viewpoint, maintaining high image quality across all viewing positions without degradation near the rotational axis.
Solution Approach 2:
The screen rotates about the optical axis to dynamically switch between different viewpoint images. During rotation, the screen passes through different angular positions where different regions face different viewpoints. The rotational mechanism enables time-multiplexed stereoscopic display, with the screen completing full rotations to serve multiple viewpoints sequentially, achieving versatile stereoscopic capability without requiring a large projection distance.
2Adaptability or versatility
If a flat-plate-shaped screen is rotated to perform stereoscopic display, then stereoscopic display capability is achieved, but apparatus size increases due to larger projection distance
Solution Approach 1:
Different regions of the screen are designed with specific emission angles tailored to their viewing positions. The first region directs light at a first emission angle toward a first viewpoint, the second region at a second emission angle toward a second viewpoint, and the third region at a third emission angle toward a third viewpoint. This localized optimization allows the screen to effectively serve multiple viewpoints during rotation without requiring a large projection distance, thus keeping the apparatus compact.
Solution Approach 2:
The screen rotates periodically about the optical axis, completing full rotations to sequentially present different viewpoint images to different viewpoints. This periodic rotation enables time-multiplexed stereoscopic display, where each viewpoint receives its designated image during specific phases of the rotation cycle. The periodic action allows versatile multi-viewpoint capability to be achieved within a compact apparatus by utilizing temporal rather than spatial separation.
3Manufacturing precision
If image light is emitted at different angles for different regions, then image quality is maintained across viewpoints, but device complexity increases
Solution Approach 1:
The screen incorporates multiple regions with different emission angle characteristics, where the first region emits light at a first emission angle, the second region at a second emission angle, and the third region at a third emission angle. This local differentiation of optical properties ensures that each region optimally directs light to its corresponding viewpoint, maintaining high image quality across all viewing positions without degradation near the rotational axis.
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
The solution enables high-quality stereoscopic display with a small form factor by emitting image light at varying angles and synchronizing with the rotation of the irradiation target, maintaining image quality across all viewpoints.
Implementation Method 1
The emitter emits the image light along the specified axis
Implementation Method 2
the optical section controlling an incident angle at which the image light emitted by the emitter is incident on the irradiation target
Implementation Method 3
The rotational mechanism rotates the irradiation target about the specified axis
Implementation Method 4
the irradiation target including at least one angle controller that emits the pieces of image light at different emission angles for respective regions
Data Source
AI summary
An image display apparatus that includes an irradiation target, a rotational mechanism, an emitter, an optical section, and a control section. The irradiation target is rotated about a specified axis (O) onto which image light from the emitter is irradiated by the rotational mechanism. The irradiation target includes at least one angle controller that emits the pieces of image light at different emission angles for respective regions of and/or for respective positions on the irradiation target. The emitter is capable of switching between the pieces of image light for at least a period of time shorter than a period of rotation performed by the rotational mechanism. The optical section controls an angle at which the image light emitted by the emitter is incident on the irradiation target. The control section synchronizes display of an image with the rotation of the irradiation target.