Transparent Holographic Display with Diffraction Grating Segmentation
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Solution Overview
Problem
Existing display technologies for mixed reality and augmented reality lack flexibility and simplicity in displaying virtual scene images, as they often require complex methods to ensure that virtual objects and real objects are seamlessly integrated while maintaining privacy and flexibility in image presentation.
Innovation Solution
An image cast system utilizing a transparent holographic display screen with superimposed diffraction gratings and multiple cast light sources, where a control device manages the light sources and diffraction gratings to cast virtual scene images on one display surface while keeping them invisible on the other surface, enhancing privacy and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a transparent holographic display screen is used to display virtual scene images, then the display flexibility and privacy are improved, but the device complexity increases due to the need for multiple diffraction gratings and cast light sources
Solution Approach 1:
The display system is segmented into multiple independent components: multiple cast light sources (first, second, third, fourth) and multiple diffraction gratings (first, second), each responsible for specific viewing directions. This segmentation allows the system to display different virtual scene images to users on different sides of the transparent display screen independently, achieving display flexibility while managing complexity through modular design
Solution Approach 2:
Different regions of the transparent display screen are assigned different optical properties through localized diffraction gratings. The first diffraction grating is positioned at a first area while the second diffraction grating is positioned at a second area, allowing each region to optimize light diffraction for its specific viewing direction, thereby improving overall display flexibility
2Ease of operation
If multiple diffraction gratings are superimposed on the transparent display screen to control light diffraction, then the image visibility control is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The diffraction grating system is segmented into multiple independent gratings (first diffraction grating, second diffraction grating) positioned at different areas of the transparent display screen. Each grating can be controlled independently to manage light diffraction for specific viewing directions, improving image visibility control while allowing for modular manufacturing that reduces overall precision requirements
Solution Approach 2:
The diffraction gratings act as intermediary elements between the cast light sources and the users. They mediate the light path by diffracting light in specific directions, allowing precise control of image visibility for different viewing angles without requiring direct mechanical control, thereby reducing manufacturing precision demands
3Area of stationary object
If cast light sources are positioned both inside and outside the transparent display screen, then the light cast area coverage is improved, but the device complexity increases
Solution Approach 1:
The cast light source system is segmented into multiple light sources positioned at different locations: first and second cast light sources outside the transparent display screen, and third and fourth cast light sources inside the screen. Each light source is responsible for illuminating specific areas and viewing directions, achieving comprehensive light cast area coverage while managing complexity through functional segmentation
Solution Approach 2:
The system merges multiple cast light sources (both inside and outside the transparent display screen) to work together with multiple diffraction gratings, creating a unified optical system that achieves comprehensive light cast area coverage. The combination of external and internal light sources complements each other to illuminate different regions effectively
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 system effectively casts virtual scene images on one side of the transparent holographic display screen while ensuring they remain invisible on the other side, thereby improving privacy and flexibility in mixed reality and augmented reality applications.
Implementation Method 1
a first diffraction grating superimposed at a first display surface of the transparent holographic display screen; a second diffraction grating superimposed at a second display surface of the transparent holographic display screen
Data Source
AI summary
An image cast system includes: a transparent holographic display screen; a first diffraction grating superimposed at a first display surface of the transparent holographic display screen; a second diffraction grating superimposed at a second display surface of the transparent holographic display screen; a plurality of cast light sources including a cast light source disposed outside and facing towards the transparent holographic display screen or a cast light source disposed inside the transparent holographic display screen; and a control device connected to the transparent holographic display screen, the first diffraction grating, the second diffraction grating, and the plurality of cast light sources. The control device controls at least one cast light source of the plurality of cast light sources to cast a virtual scene image onto the first display surface of the transparent holographic display screen; and outputs an electrical control signal to the second diffraction grating.