Head-Mounted Display Position Adjustment for Image Superimposition
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Solution Overview
Problem
Existing head-mounted display devices face challenges in maintaining optical performance and miniaturization while increasing the amount of information displayed, particularly in adjusting the position of left and right display devices to prevent image superimposition and accommodate varying content for each eye.
Innovation Solution
A head-mounted display apparatus with a pair of left and right display devices and a display control unit that adjusts the display content based on the position changes of the first and second video images, using posture adjustment mechanisms and sensors to ensure separate and effective image display for each eye, preventing superimposition and allowing for different content to be displayed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the position of left and right display devices is adjusted with high precision to display common content to both eyes, then stereoscopic video recognition is achieved, but it becomes difficult to respond to demands for maintaining optical performance and miniaturization while increasing the amount of information displayed
Solution Approach 1:
The patent makes the display position dynamically adjustable through posture adjustment mechanisms that allow the display devices to be moved in the optical axis direction. This dynamic adjustment capability enables the system to adapt to different viewing conditions and content types, resolving the contradiction by allowing high precision alignment when needed while providing flexibility to reduce precision requirements for other scenarios.
Solution Approach 2:
The patent changes the parameter of display position by introducing adjustable mechanisms that modify the optical path length and display distance. By allowing continuous adjustment of display position parameters, the system can optimize for both precision alignment and miniaturization requirements depending on the specific use case.
2Loss of information
If various pieces of information are individually displayed to increase the amount of information, then information display capability is improved, but it becomes difficult to maintain optical performance and miniaturization
Solution Approach 1:
The patent utilizes the optical axis direction as an additional dimension for information display. By adjusting display position along the optical axis, the system can present multiple layers of information at different depths, effectively increasing information capacity without proportionally increasing device volume. This dimensional approach allows efficient packing of information.
Solution Approach 2:
The patent segments information display into different depth layers along the optical axis. By dividing the display space into multiple focal planes, the system can present different types of information at different depths, increasing overall information capacity while maintaining a compact form factor through efficient spatial organization.
3Adaptability or versatility
If display position is adjusted to accommodate different content for each eye, then adaptability is improved, but image superimposition may occur and optical performance may deteriorate
Solution Approach 1:
The patent incorporates sensors that detect the display position and provide feedback to the control unit. This feedback mechanism allows the system to monitor and adjust for potential image superimposition in real-time, maintaining optical performance while accommodating different content for each eye. The control unit uses the sensor data to make precise adjustments that prevent degradation.
Solution Approach 2:
The patent replaces complex mechanical alignment systems with a combination of sensors and control algorithms. Instead of relying solely on precise mechanical positioning, the system uses electronic sensing and control to maintain proper optical alignment, improving adaptability while preserving optical performance through software-based correction.
Data Source
AI summary
In a left and right pair of a first display device and a second display device that perform repositionable display, mutually different display contents can be visually recognized as a first video image and a second video image. Further, a display control portion controls the display content in accordance with at least one of the first video image and the second video image.