Curved-Mirror Display Optics for Short-Distance Large Virtual Images
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Solution Overview
Problem
Large-screen display systems are expensive, require large projection distances, and often necessitate additional components like Fresnel screens, limiting their usability and space requirements.
Innovation Solution
A display system comprising a picture generation unit, diffuser screen, and curved mirror that generates a real image, performs diffuse reflection, and creates a magnified virtual image, allowing for compact design and multi-user viewing without additional curtains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a large-screen display system is used, then the screen size is large, but the cost is high and the space occupied is large
Solution Approach 1:
The patent uses a small-size image generation unit to generate images that are then magnified through optical elements (curved mirror and diffuser screen) to create a large-screen display effect. This copying approach allows a compact device to produce large visual output without requiring expensive large-screen display hardware
Solution Approach 2:
The patent transforms the display from a direct 2D screen to a 3D virtual image space using a curved mirror and diffuser screen. This dimensional transformation allows the image to be viewed from multiple angles and creates the perception of a large screen without physically occupying large space
2Area of moving object
If a projector is used to achieve large projection, then the screen size is large, but the projection distance must be large and the space occupied is large
Solution Approach 1:
The patent employs a curved mirror with specific curvature to magnify the image and create a virtual image at a shorter distance. The curvature of the mirror enables the optical path to be folded, achieving large projection效果 in a compact space without requiring long projection distance
Solution Approach 2:
The patent introduces a diffuser screen as an intermediary between the image generation unit and the curved mirror. This diffuser screen performs diffuse reflection to create a virtual image that can be viewed from multiple angles, enabling large-screen display效果 at short distance without traditional projector requirements
3Length of moving object
If a traditional projector is used, then the projection distance is large, but the magnification capability at short distance is insufficient
Solution Approach 1:
The curved mirror's specific curvature is designed to provide magnification while maintaining a compact form factor. The mirror's shape enables it to converge and magnify light rays from the small image generation unit, achieving high magnification capability at short projection distance
Solution Approach 2:
The patent changes the optical parameters by using a diffuser screen that performs diffuse reflection instead of specular reflection. This parameter change enables the system to achieve magnification and wide viewing angles simultaneously at short distance, overcoming traditional projector limitations
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 large-screen projection at a short distance, reduces space requirements, and supports multi-user viewing without the need for specific curtains, enhancing usability and flexibility.
Implementation Method 1
The diffuser screen is configured to perform diffuse reflection on the real image
Implementation Method 2
The curved mirror is configured to perform imaging based on the real image obtained through diffuse reflection, to generate a magnified virtual image
Implementation Method 3
the first diffractive optical element is located between the light source and the prism, and the diffractive optical element is configured to split a light beam emitted by the light source
Implementation Method 4
The lens is configured to collimate a combined light beam and direct the combined light beam to the imaging chip
Implementation Method 5
the polarization film is placed after the diffuser screen, and the polarization film is configured to filter out interference light
Data Source
AI summary
A display system is provided. The display system includes a picture generation unit, a diffuser screen, and a curved mirror. The picture generation unit is configured to generate a real image and perform imaging on the diffuser screen. The diffuser screen is configured to perform diffuse reflection on the real image. The curved mirror is configured to perform imaging based on the real image obtained through diffuse reflection, to generate a magnified virtual image.