Telecentric Augmented Reality Display for Multi-Depth Imaging
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Solution Overview
Problem
Existing augmented reality display systems face high costs and display quality issues due to the use of multiple displays or temperature-sensitive liquid lenses, which affect image display effects.
Innovation Solution
An augmented reality display apparatus with a depth acquisition module, display module, processing module, and lifter module, which work together to ensure multi-depth display without changing the angle of light received by the human eye, using a spectacle frame and optical system to maintain an object-side telecentric optical structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple displays are arranged at different locations to achieve multi-depth display, then virtual images can be displayed at different depth positions, but the cost of the augmented reality apparatus increases
Solution Approach 1:
The patent merges multiple display functions into a single display device by moving it along the optical axis to achieve multi-depth display. Instead of using multiple displays at different locations, one display is dynamically repositioned to different depths along the optical axis, combining multiple display functions into a single component.
Solution Approach 2:
The display device is made dynamic by enabling it to move along the optical axis. The display position is adjusted dynamically based on the depth information of the virtual object, allowing a single display to serve multiple depth positions rather than being static at one location.
2Adaptability or versatility
If a liquid lens is used as an optical processor to control light angle and direction, then the angle and direction of light can be controlled by controlling the shape of the liquid lens, but the liquid lens has strict requirements on the temperature of the surrounding environment
Solution Approach 1:
The patent extracts the temperature sensitivity issue from the system by removing the liquid lens component. Instead of using a liquid lens that is sensitive to temperature changes, the invention uses a display device whose position can be adjusted along the optical axis, eliminating the harmful temperature dependency while maintaining light control capability.
3Adaptability or versatility
If the display system moves to different positions to achieve multi-depth display, then virtual images can be displayed at different depths, but the angle of light received by the human eye may change
Solution Approach 1:
The patent maintains equipotentiality in terms of light angle by ensuring that the display surface remains perpendicular to the optical axis at all positions along the optical axis. This is achieved by moving the display along the optical axis while keeping its orientation consistent, so that the light angle received by the human eye remains stable despite changes in display depth.
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 apparatus achieves cost-effective, high-quality multi-depth augmented reality display by maintaining consistent light angles and reducing power consumption and display delays.
Implementation Method 1
the driver is a voice coil motor, the voice coil motor is configured to drive the display system to move to the target position
Data Source
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Figure 6(a)~7(b)
AI summary
An augmented reality display apparatus and an augmented reality display device comprising the same. The apparatus comprises: a display system (12) configured to display a target image; a depth acquisition assembly (11) configured to acquire depth position information of a target object, the target object including at least one of a human eye, the target image, and a real environment within a field of view of the human eye, the depth position information of the target object including at least one of position information of a depth plane at a gaze position of human eyes, position information of a depth plane where the target image is to be displayed, and position information of a depth plane of the real environment; a processor (13) fixedly connected to the display system (12), the processor (13) being configured to determine displacement information of the display system (12) based on the depth position information of the target object acquired by the depth acquisition assembly (11); a spectacle frame (15) connected to the display system (12) and the depth acquisition assembly (11); and a lifter (14) fixedly connected to the spectacle frame (15), the lifter (14) being connected to the processor (13) by a cable, a driver (142) in the lifter (14) being fixedly connected to the display system (12), the lifter (14) being configured to drive the display system (12) to move to a target position relative to the spectacle frame (15) based on the displacement information determined by the processor (13), the target position being a final arrival position of the display system (12) indicated by the displacement information.