3D Projection Using Slanted Prism Array and Segmented Display
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Solution Overview
Problem
Conventional three-dimensional image projection methods using dual displays or single displays with prism arrays face issues such as increased system size, limited field of view, and distortion due to the need for multiple sections and asymmetrical prism arrays, which result in reduced image size and limited effective viewing angles.
Innovation Solution
A 3D image projection apparatus utilizing a single display with a slanted prism array and a field of view control filter to refract light rays, where the display is divided into sections with varying heights and angles to project dual-layer images, and the filter blocks interfering light rays to enhance the field of view and prevent image overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dual display configuration is used to project multi-layer 3D images, then the depth perception and stereoscopic effect are improved, but the system size and complexity increase
Solution Approach 1:
The patent merges the functions of multiple displays into a single display by dividing it into multiple output sections (first output section and second output section). Each section projects hologram images at different depths, achieving multi-layer 3D imaging without requiring multiple separate display devices. This reduces system size while maintaining stereoscopic image quality.
Solution Approach 2:
The single display is segmented into multiple output sections with different functions. The first output section projects hologram images at a first depth, while the second output section projects hologram images at a second depth. This segmentation allows each section to be optimized for specific depth ranges, achieving superior depth perception and stereoscopic effect.
2Device complexity
If a single display is used to reduce system size, then the system complexity is reduced, but the field of view and image size are limited
Solution Approach 1:
The patent extends the field of view by utilizing the vertical dimension. The first output section and second output section are arranged at different vertical positions on the single display. The first output section has a greater height than the second output section, allowing the system to project 3D images with a wider vertical field of view, effectively expanding the viewing area without increasing system footprint.
Solution Approach 2:
The patent employs an asymmetrical prism array where different sections have different heights and optical properties. The first output section corresponds to a larger prism section, while the second output section corresponds to a smaller prism section. This asymmetry allows each section to optimize its light refraction characteristics, expanding the overall field of view while maintaining system compactness.
3Area of stationary object
If asymmetrical prism arrays are used to expand field of view, then the viewing angle is improved, but image distortion and overlap occur
Solution Approach 1:
The patent implements a field of view control filter that selectively blocks interfering light rays. This filter receives feedback about light ray trajectories and blocks those that would cause image overlap or distortion while allowing beneficial rays to pass. This active control mechanism maintains image quality across an expanded field of view by dynamically managing light ray paths.
Solution Approach 2:
The patent extracts and blocks interfering light rays using a field of view control filter. By identifying and removing specific light rays that would cause distortion or overlap, the system maintains clear, undistorted images across a wider field of view. This selective extraction of harmful light paths resolves the distortion issue while preserving the expanded viewing angle.
4Reliability
If multiple sections with varying heights are used to project dual-layer images, then the depth perception is improved, but the device complexity increases
Solution Approach 1:
The single display performs multiple functions by operating different output sections simultaneously. The first output section projects hologram images at a first depth while the second output section projects hologram images at a second depth. This multi-functionality achieves superior depth perception without requiring separate display devices for each depth layer, reducing overall device complexity.
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 approach allows for a reduced system size, increased field of view, and improved depth perception by projecting larger 3D images with a wider vertical field of view, while minimizing distortion and overlap, thereby enhancing the overall viewing experience.
Implementation Method 1
a prism array that is located in front of the display and refracts light rays of the first hologram image and the second hologram image
Implementation Method 2
a field of view control filter that is located on the front of the first output section and blocks a light ray incident at a second angle among the light rays of the first hologram image
Data Source
AI summary
A three-dimensional image projection apparatus includes a display having a first output section that outputs a first hologram image and a second output section that outputs a second hologram image, and a prism array that is located in front of the display and refracts light rays of the first hologram image and the second hologram image, and the prism array is slanted at a first angle relative to the display.