Freeform Surface Display Apparatus for Multi-Depth Virtual Images
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Solution Overview
Problem
Existing display technologies struggle to provide clear virtual images at multiple depths, leading to discomfort and dizziness due to discrepancies between perceived and provided depth information.
Innovation Solution
A display apparatus featuring a freeform surface that is optimally designed to form virtual images at different depths, combined with a driver mechanism to adjust the position of the image generator and a processor to control depth perception, ensuring clear and comfortable viewing across varying depths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional display surface is used, then the device structure is simple, but clear virtual images at multiple depths cannot be formed
Solution Approach 1:
The patent applies a freeform curved surface instead of a conventional flat display surface. This curved surface is specifically designed to reflect light from the image generator at different depths, enabling clear virtual images to be formed at multiple depth positions simultaneously while maintaining optical precision
2Measurement precision
If virtual images at multiple depths are provided, then depth perception accuracy is improved, but user discomfort and dizziness increase due to perception discrepancies
Solution Approach 1:
The patent incorporates an eye tracking sensor that detects the user's eye position and provides feedback to the processor. The processor adjusts the image generation parameters based on this feedback, dynamically optimizing the virtual images at different depths to match the user's actual viewing position, thereby eliminating perception discrepancies and preventing discomfort and dizziness
Solution Approach 2:
The system dynamically adjusts the virtual image parameters based on real-time eye tracking data. The processor modifies the depth and position of virtual images according to the detected eye position, creating a dynamic adaptation that maintains accurate depth perception without causing user discomfort
3Manufacturing precision
If the image generator position is fixed, then the device structure is simple, but clear viewing at varying depths cannot be achieved
Solution Approach 1:
The patent introduces a driver mechanism that enables the image generator to move along the optical axis. This dynamic positioning capability allows the system to adjust the image generator's position to optimize image clarity at different depths, working in coordination with the freeform surface and eye tracking system to achieve clear viewing across varying depths
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 clear and comfortable viewing of virtual images at multiple depths by minimizing errors in depth perception, reducing dizziness and enhancing user experience.
Implementation Method 1
a freeform surface that is optimally designed to form virtual images at different depths
Data Source
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AI summary
Provided is a display apparatus including an image generator configured to time-sequentially generate a plurality of images by modulating light, and an optical system including a freeform surface that is configured to time-sequentially form a plurality of virtual images respectively corresponding to the plurality of images at different depths from a user's eye, wherein each error value among error values between the plurality of images and the plurality of virtual images respectively corresponding to the plurality of images on the freeform surface is less than or equal to a profile value of the freeform surface.