3D Display Module Dihedral Mirror Overlap for Autostereoscopic HUD
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Solution Overview
Problem
Conventional Head Up Displays (HUDs) generate two-dimensional (2D) images, which do not meet the demand for more vivid three-dimensional (3D) images that better align with human visual perception.
Innovation Solution
A 3D display module and system utilizing a dihedral angle configuration between two plane mirrors and corresponding display screens, where the first and second virtual images generated by each screen overlap to form a 3D image, and a third plane mirror, concave mirror, and transflective mirror are used to reflect and magnify the image for a viewer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional HUD is used to display information, then the driver can see information without looking down, but the image is two-dimensional and lacks visual depth
Solution Approach 1:
The patent transforms the conventional 2D HUD display into a 3D display by introducing a dihedral angle structure with two plane mirrors. The first plane mirror reflects light from the first display screen, and the second plane mirror reflects light from the second display screen, creating overlapping virtual images that form a 3D virtual image. This dimensional transformation adds depth perception to the displayed information, making it more vivid and visually engaging while maintaining the head-up display functionality.
2Stability of the object's composition
If multiple mirrors and display screens are added to create 3D images, then image depth is improved, but the device complexity increases
Solution Approach 1:
The patent divides the display system into two independent but coordinated subsystems: the first display screen with the first plane mirror, and the second display screen with the second plane mirror. Each subsystem independently generates a virtual image, and the two virtual images overlap to form the final 3D image. This segmentation allows for modular design and assembly, making the complex 3D display system more manageable and easier to manufacture despite its increased complexity compared to conventional HUDs.
3Illumination intensity
If the virtual images are made larger for better visibility, then the viewing experience is improved, but the optical path length and device size increase
Solution Approach 1:
The patent combines the functions of multiple optical components into an integrated optical system. The first and second plane mirrors are positioned at a dihedral angle, and their reflective surfaces work together to direct light from both display screens to the viewer's eyes. The overlapping of the two virtual images creates a magnified 3D virtual image that is larger and brighter than conventional displays, improving visibility without requiring excessively long optical paths or large device dimensions.
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 generation and observation of autostereoscopic 3D images, allowing viewers to see an outside scene and 3D information simultaneously without looking down, enhancing the viewing experience by providing a magnified 3D image suitable for various applications, including automotive use.
Implementation Method 1
A first virtual image of the first display screen generated by the first plane mirror is overlapped with a second virtual image of the second display screen generated by the second plane mirror to form a first 3D virtual image
Implementation Method 2
light emitted from the overlapped first virtual image and the second virtual image are reflected onto an inner surface of the transflective mirror facing a viewer by the third plane mirror and the concave mirror
Implementation Method 3
light reflected by the inner surface of the transflective mirror is extended backwards to intersect to form a second 3D virtual image, and the second 3D virtual image is a magnified image of the first 3D virtual image
Data Source
AI summary
A three-dimensional (3D) display module, a 3D display system and a 3D display method are provided. The 3D display module includes a first plane mirror, a second plane mirror disposed correspondingly to the first plane mirror. A side of the first plane mirror coincides with a side of the second plane mirror to form a dihedral angle between the first plane mirror and the second plane mirror. The 3D display module also includes a first display screen and a second display screen disposed correspondingly to the first display screen. The first display screen and the second display screen are disposed outside the dihedral angle and at two sides of an angle bisecting plane of the dihedral angle, respectively. A first virtual image of the first display screen is overlapped with a second virtual image of the second display screen to form a first 3D virtual image.