3D Display Device Parallax Angle Measurement
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Solution Overview
Problem
Existing 3D image display devices using observer motion parallax fail to clearly determine the relationship between user viewing angle and visual angle, making it difficult to display sequential three-dimensional changes based on relative eye displacement with respect to the image display screen.
Innovation Solution
A 3D image display device and method that measure the to-display-screen parallax angle and separation distance, selecting a 2D image rotated by a calculated angle corresponding to the parallax angle, using 3D information including rotational and virtual separation distances, to determine the rotational angle of the object based on the formula ΔΘ=Θ1×Le/(Lo+Le), where Θ1 is the parallax angle, Le is the separation distance, and Lo is the virtual separation distance, allowing for dynamic adjustment of the virtual separation distance and scaling factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a 3D image display device uses observer motion parallax to provide sequential three-dimensional perception, then the observer does not need to wear special glasses, but the relationship between user viewing angle and visual angle is not clear, making it difficult to determine the correct image to display
Solution Approach 1:
The system measures the user's viewing angle relative to the display screen and uses this feedback to dynamically select and display the appropriate 2D image from multiple available images. The measurement unit continuously monitors the parallax angle and separation distance, providing real-time feedback that enables accurate image selection corresponding to the user's current viewing position.
Solution Approach 2:
The patent replaces the need for mechanical 3D display mechanisms (such as rotating displays or multiple physical screens) with a computational approach. The system uses image processing and coordinate transformation algorithms to calculate which pre-captured 2D image best corresponds to the user's viewing angle, substituting mechanical complexity with computational precision.
2Measurement precision
If multiple 2D images are stored with associated 3D information to enable sequential three-dimensional perception, then accurate 3D display is possible, but the device complexity increases due to the need to store and manage multiple images with metadata
Solution Approach 1:
The system performs preliminary action by pre-capturing multiple 2D images from different angles and pre-associating each image with its corresponding 3D information (viewing angle range, separation distance parameters). This preparation is done before the user views the content, so that when the user looks at the display, the system can quickly retrieve and display the appropriate pre-prepared image without requiring complex real-time processing.
3Measurement precision
If the system displays images based on measured parallax angle and separation distance, then accurate sequential 3D perception is achieved, but the calculation complexity increases due to the need to determine rotational angle using the formula ΔΘ=Θ1×Le/(Lo+Le)
Solution Approach 1:
The system changes parameters by using the measured parallax angle Θ1 and separation distance Le as input parameters to calculate the rotational angle ΔΘ. Rather than directly measuring the rotational angle, the system transforms the measurement problem into a parameter calculation problem using the established formula, which simplifies the measurement process while maintaining accuracy.
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 easy and accurate display of sequential three-dimensional changes by determining the rotational angle of the object based on observer motion parallax, providing a clear and dynamic 3D image display experience without the need for special glasses.
Implementation Method 1
a motion parallax amount measurement unit configured to measure a to-display-screen parallax angle Θ1 and a to-display-screen separation distance Le with respect to the image display screen
Data Source
AI summary
A three-dimensional image display device includes: an image display screen 10; a motion parallax amount measurement unit 12 which measures a to-display-screen parallax angle Θ1 and a to-display-screen separation distance Le with respect to the screen 10; and a display unit 8 which selects a two-dimensional image of the object to be observed that has rotated by an angle ΔΘ corresponding to the parallax angle Θ1, and transmits the two-dimensional image to the screen 10. Each of the plurality of two-dimensional images is associated with three-dimensional information; the three-dimensional information includes at least the rotational angle ΔΘ and a virtual separation distance Lo between the object to be observed and the image display screen; and the rotational angle ΔΘ of the object to be observed is determined on the basis of the following formula:ΔΘ=Θ1×Le/(Lo+Le).