Holographic Display with Cambered Spatial Light Modulator
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Solution Overview
Problem
Conventional 3D display technologies cause user dizziness due to differing images for the left and right eyes, and existing holographic display techniques face challenges in dynamic display and limited viewing angles.
Innovation Solution
A holographic display device comprising a spatial light modulator with cambered surfaces and a light source unit, along with a deflecting device that adjusts output light to the user's observation position, allowing for dynamic hologram display and improved viewing angles through the use of a controller to manage light sources and deflecting elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional 3D display technology is used to provide different images for left and right eyes, then stereoscopic image effect is improved, but user comfort deteriorates due to dizziness
Solution Approach 1:
The spatial light modulator is divided into multiple loading portions (first, second, third loading portions) that can independently receive different holographic data. This segmentation allows different regions to display different content or adjust their parameters independently, enabling optimized viewing angles and reduced visual discomfort for different observer positions.
Solution Approach 2:
The patent implements dynamic control of the holographic display system where the controller can adjust which loading portions are active based on observer position. The system dynamically switches between different loading portions to maintain optimal viewing conditions, transforming the static display into a dynamic adaptive system that responds to user position and reduces dizziness.
2Object-affected harmful factors
If holographic display technique is used to provide consistent images for both eyes, then user comfort is improved, but viewing angle is limited
Solution Approach 1:
The spatial light modulator is divided into multiple loading portions with different cambered surface orientations. The first loading portion has a light exit surface protruding away from the light source, while the second loading portion has a light exit surface protruding toward the light source. This segmentation allows different portions to serve different viewing angles simultaneously.
Solution Approach 2:
The patent employs asymmetric cambered surfaces on different loading portions with different curvature directions and magnitudes. This asymmetry enables the display to accommodate observers at different positions and angles, expanding the effective viewing cone while maintaining comfortable holographic imaging for each observer.
3Adaptability or versatility
If multiple loading portions with different cambered surfaces are used to increase viewing angle, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent integrates multiple loading portions with different cambered surfaces into a single spatial light modulator device. By merging these functionally distinct portions into one unified component, the system achieves multi-angle viewing capability without requiring multiple separate devices, thereby managing complexity through integration rather than multiplication of discrete components.
Solution Approach 2:
The spatial light modulator is designed as a universal device that can serve multiple viewing angles and observer positions simultaneously through its multiple loading portions. Each loading portion can be independently controlled to address different viewing requirements, making the single device multi-functional and reducing the need for additional specialized components.
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 provides a dynamic and comfortable viewing experience by ensuring consistent images for both eyes and increasing the viewing angle of holographic displays, reducing user fatigue and enhancing the visibility of holographic images for multiple observers.
Implementation Method 1
The holography display technique is an image recording and reproduction technology which uses interference and diffraction principle to record and reproduce the real three-dimensional image of objects.
Implementation Method 2
The holography display technique is an image recording and reproduction technology which uses interference and diffraction principle to record and reproduce the real three-dimensional image of objects.
Implementation Method 3
a light exit surface of at least a part of which is a first cambered surface protruding in a direction away from the light source unit
Implementation Method 4
The deflecting device is provided on a light exit side of the spatial light modulator, covers at least a part of the at least one loading portion, and is configured to deflect the output light of the part of the at least one loading portion covered by the deflecting device to the observation position.
Data Source
AI summary
Embodiments of the present disclosure provide a holographic display device. The holographic display device includes a spatial light modulator and a light source unit. The light source unit is provided on the light entry side of the spatial light modulator and configured to providing read-out light to the spatial light modulator. The spatial light modulator includes at least one loading portion for receiving a write-in signal, which comprises a plurality of pixel units arranged in a matrix form, and the light exit surface of at least a part of which is a first cambered surface protruding in a direction away from the light source unit.