Multi-Directional 3D Display Using Dual Optical Shutters
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Solution Overview
Problem
Conventional three-dimensional image display apparatuses restrict viewing to a single direction, limiting the ability to view three-dimensional images from multiple angles.
Innovation Solution
The apparatus employs an image display device with pixel pairs across light-shielding portions, combined with first and second optical shutter devices that control light transmission to allow three-dimensional image viewing from multiple directions by selectively transmitting light to the viewer's eyes through strategically placed light-transmitting portions and shutter control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional three-dimensional image display apparatus uses a single viewing direction configuration, then the device complexity is reduced, but the adaptability for viewing from multiple directions deteriorates
Solution Approach 1:
The optical shutter device is divided into multiple independent shutter units (first optical shutter device and second optical shutter device) positioned at different locations. Each shutter unit can be controlled independently to direct light toward different viewing directions, enabling multi-directional viewing capability while maintaining manageable complexity through modular design
Solution Approach 2:
The patent extends the viewing capability from a single direction to multiple directions by adding spatial dimensions. The first and second optical shutter devices are positioned at different spatial locations and angled to direct light toward different viewing directions, effectively adding angular dimensionality to the display system
2Manufacturing precision
If light is transmitted uniformly across the display screen, then the ease of manufacture is improved, but the image quality uniformity across different viewing angles deteriorates
Solution Approach 1:
Different regions of the display screen are equipped with different optical shutter devices configured for specific viewing directions. The first optical shutter device is configured for a first viewing direction while the second optical shutter device is configured for a second viewing direction, ensuring that each local region optimizes image quality for its intended viewing angle rather than attempting uniform performance across all angles
Solution Approach 2:
Optical shutter devices are introduced as intermediary elements between the display screen and the viewers. These shutters act as mediators that selectively transmit or block light based on the desired viewing direction, ensuring uniform image quality is delivered to viewers at different angles without requiring the screen itself to be manufactured with complex angle-dependent properties
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 high-quality three-dimensional image viewing not only from the normal direction but also from two directions tilting to the left and right, improving the viewing experience by eliminating image unevenness across different angles.
Implementation Method 1
first light-transmitting portions that are placed at positions corresponding to the first light-shielding portions of the image display device, transmit light toward the pixel pairs of the image display device, and cause image light beams passing through the pixels of the pixel pairs to strike a right eye and a left eye
Implementation Method 2
second light-transmitting portions that are placed at positions corresponding to the second light-shielding portions of the image display device, and cause image light beams respectively passing through the pixels of the pixel pairs that are adjacent to each other across the second light-shielding portions to strike right eyes and left eyes of viewers located in a predetermined second viewing direction and a third viewing direction
Implementation Method 3
first shutter portions to control transmission/shielding of light with respect to an area other than the first light-transmitting portions, and second shutter portions to control transmission/shielding of light with respect to an area other than the second light-transmitting portions
Data Source
AI summary
An image display apparatus includes an image display device having pixels to display right- and left-eye images for a three-dimensional image, a first and second optical shutter devices located on rear and front sides of the image display device. The pixels include pixel pairs that have pixels arranged across first light-shielding portions and that are arrayed across second light-shielding portions. The first shutter device includes first light-transmitting portions that cause image light beams passing through the pixels to strike the right and left eyes of a viewer located in a first direction, and first shutter portions to control transmission/shielding of light. The second shutter device includes second light-transmitting portions that cause image light beams passing through the pixels to strike right eyes and left eyes of viewers located in second and third directions, and second shutter portions to control transmission/shielding of light.