Multi-Focal Image Display Optics With Telecentric Real Image Formation
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Solution Overview
Problem
Current image display devices are unable to effectively display images of different focal lengths, limiting their ability to provide a three-dimensional viewing experience with high-quality images.
Innovation Solution
An image display device comprising a first display device, an imaging optical system, and a second display device, where the imaging optical system forms a real image corresponding to the first image and the optical member reflects and transmits light to create virtual and actual images of different focal lengths, allowing for a three-dimensional display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional imaging optical system is used to display images of different focal lengths, then the display capability is improved, but the system size increases and integration becomes difficult
Solution Approach 1:
The patent implements nesting by placing the first display device inside the second display device structure. The imaging optical system is integrated within the display device assembly, allowing compact arrangement. The real image formed by the imaging optical system is positioned between the imaging optical system and the optical member, enabling space-efficient configuration that reduces overall system volume while maintaining multi-focal length display capability.
Solution Approach 2:
The patent utilizes the spatial dimension by forming a real image at a specific position between the imaging optical system and the optical member. This three-dimensional spatial arrangement allows light from the first display device to be reflected by the optical member after passing through the imaging optical system, creating virtual images at different focal lengths without increasing system footprint.
2Volume of moving object
If the imaging optical system is made compact, then ease of integration is improved, but image quality may deteriorate
Solution Approach 1:
The patent changes the optical parameters by using a telecentric imaging optical system design. This parameter change allows the system to maintain high image quality with reduced size. The telecentric design ensures that light rays are parallel to the optical axis, improving image quality while allowing compact configuration. The system also utilizes the specific parameter of light distribution (Lambertian) from the first display device to optimize image formation.
3Adaptability or versatility
If multiple display devices are used to create different focal lengths, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent implements multi-functionality by using a single integrated system that performs multiple functions: the first display device displays a first image, the imaging optical system forms a real image, the optical member reflects light, and the second display device displays a second image. This unified multi-functional design achieves multi-focal length display without requiring separate independent systems, thereby reducing overall device complexity.
Solution Approach 2:
The patent merges multiple functional components into an integrated assembly. The imaging optical system is combined with the display devices and optical member in a unified structure. The light path is integrated such that light from the first display device passes through the imaging optical system, is reflected by the optical member, and reaches the viewer, while the second display device operates simultaneously. This merging reduces the number of separate components and simplifies the overall system.
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 the simultaneous display of images with different focal lengths, enhancing the three-dimensional viewing experience while maintaining high image quality and reducing the size of the imaging optical system, thus improving visibility and ease of integration in limited spaces.
Implementation Method 1
an optical member configured to reflect light from the imaging optical system
Implementation Method 2
an imaging optical system comprising an input element on which light from the first display device is incident and an output element on which light having traveled via the input element is incident, the output element emitting light to form a real image corresponding to the first image
Data Source
AI summary
An image display device includes: a first display device configured to display a first image; an imaging optical system including: an input element configured to receive light emitted from the first display device, and an output element configured to receive light traveling via the input element and to emit light to form a real image corresponding to the first image; an optical member configured to reflect light emitted from the imaging optical system; and a second display device configured to display a second image. The imaging optical system is substantially telecentric at a real image side. The first display device is configured such that the light emitted from the first display device exhibits a substantially Lambertian light distribution. The imaging optical system and the optical member are configured such that the real image is formed between the imaging optical system and the optical member.