See-Through Display Projection Adjustment by Superimposition Distance
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Solution Overview
Problem
Existing display devices, such as HUDs, struggle to maintain appropriate image display within a predetermined angle of view, leading to information loss due to inconsistent superimposition distances, especially when adjusting images to fit within the viewable region.
Innovation Solution
A display device that includes a projector, an obtainer to measure superimposition distance, and a controller to adjust the projection position by an amount corresponding to the superimposition distance, ensuring images are displayed within the viewable region and maintaining information clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the image projection position is adjusted to fit within the predetermined angle of view, then the image display within the viewable region is improved, but the superimposition distance information is lost
Solution Approach 1:
The system measures the actual superimposition distance and uses this feedback to dynamically adjust the projection position. The controller calculates the required position adjustment based on the measured superimposition distance and applies it to ensure the virtual image is correctly positioned within the predetermined angle of view, thereby maintaining both display accuracy and distance information.
Solution Approach 2:
The system changes the projection position parameter based on the superimposition distance. By adjusting the projection position by an amount corresponding to the superimposition distance, the system maintains the correct spatial relationship and distance information while ensuring the image remains within the viewable region.
2Device complexity
If the projection position is fixed, then the device complexity is reduced, but the image cannot be displayed accurately for different superimposition distances
Solution Approach 1:
The system transitions from a fixed projection position to a dynamic one that automatically adjusts based on the measured superimposition distance. The controller calculates and applies the necessary position adjustment in real-time, enabling accurate image display for different distances without requiring complex manual adjustment mechanisms.
Solution Approach 2:
The system performs self-adjustment by automatically measuring the superimposition distance and calculating the required projection position change. This self-service capability eliminates the need for complex external adjustment mechanisms while maintaining high display accuracy across different superimposition distances.
3Manufacturing precision
If the projection position is adjusted for each superimposition distance, then the image display accuracy is improved, but the processing time increases
Solution Approach 1:
The system performs preliminary measurement of the superimposition distance and pre-calculates the required projection position adjustment. By obtaining the superimposition distance in advance and using it to determine the projection position change before actual image projection, the system minimizes processing time while maintaining accuracy.
Solution Approach 2:
The system replaces complex mechanical adjustment mechanisms with an optical and computational approach. By using the measured superimposition distance to calculate and apply position adjustments through the projection system's existing optical path, the system achieves accurate image display without requiring time-consuming mechanical reconfiguration.
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 solution allows for accurate display of images within the viewable region, preserving information integrity by adjusting projection positions based on superimposition distances, thereby preventing information loss.
Implementation Method 1
a projector that projects light showing the image onto the display medium
Implementation Method 2
a display medium that transmits light from the outside world to allow a user to view a virtual image superimposed on the outside world
Implementation Method 3
changes the original projection position of the image by an amount of change corresponding to the superimposition distance
Data Source
AI summary
A display device forms a virtual image of an image visible to a user in a predetermined region in an outside world by projecting the image within a predetermined angle of view (display region) of a display medium through which the outside world is viewable, the predetermined region corresponding to the predetermined angle of view. The display device includes: a projector that projects light showing the image onto the display medium; an obtainer (first obtainer) that obtains a superimposition distance that is a distance from the user to a position at which the virtual image of the image is formed; and a controller that, when an original projection position of the image is outside the predetermined angle of view, changes the original projection position of the image by an amount of change corresponding to the superimposition distance and causes the projector to project the image.