Virtual Image Display Device Vision-Based Size Adjustment
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Solution Overview
Problem
Virtual image display devices struggle to enhance visibility for users with varying vision, particularly due to far-sightedness or near-sightedness, as they tend to include extensive information without adjusting for individual visual acuity, leading to reduced visibility.
Innovation Solution
A virtual image display device that includes a vision measurement interface, a display information acquirer, a display image generator, and a projection processor, which measures user vision and adjusts the display image's size and information volume based on the user's acuity, projecting the image at an optimal distance to enhance visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the display image includes extensive information to provide comprehensive data, then the information volume increases, but the visibility decreases for users with poor vision
Solution Approach 1:
The patent implements dynamic adjustment of image size based on measured vision parameters. The display system continuously adapts the scaling of displayed information according to the user's vision acuity, allowing the same information volume to be effectively displayed for users with different visual capabilities. This resolves the contradiction by making the display adaptable rather than static.
Solution Approach 2:
The patent changes the display parameter (image size) based on measured vision parameters. By measuring the user's vision and adjusting the display image size accordingly, the system maintains visibility while preserving information volume. The information density remains constant while the physical display size adapts to individual visual needs.
2Device complexity
If the virtual image is displayed at a fixed position, then the display structure is simple, but the visibility varies for users with far-sightedness or near-sightedness
Solution Approach 1:
The patent makes the virtual image position dynamic rather than fixed. The display position is adjusted based on measured vision parameters, allowing users with different visual conditions (far-sightedness, near-sightedness) to view the image at an optimal distance. This dynamic positioning resolves the visibility issue while maintaining relatively simple system architecture.
3Quantity of substance
If the display image size is reduced to fit more information, then the information density increases, but the visibility for users with poor vision decreases
Solution Approach 1:
The patent changes the display image size parameter based on measured vision acuity. Instead of reducing image size to increase information density, the system enlarges the image for users with poor vision while maintaining appropriate information density through selective display of high-priority information. This resolves the contradiction by adapting image size to individual visual needs rather than uniformly reducing size.
Solution Approach 2:
The patent applies different display strategies to different types of information based on priority. High-priority information is displayed with larger size and greater prominence, while lower-priority information is selectively omitted or displayed with reduced emphasis. This local differentiation of display quality maintains visibility for users with poor vision while preserving essential information density.
Data Source
AI summary
A virtual image display device includes a virtual image position selector, a vision measurement interface, a display information acquirer, a display image generator, and a projection processor. The virtual image position selector selects either a first virtual image position or a second virtual image position as a display position of the virtual image. The vision measurement interface measures a vision of a user based on a user's response to a vision measurement image projected as a virtual image at the display position. The display information acquirer acquires information to be shown. The display image generator generates a display image showing an image corresponding to the information acquired by the display information acquirer in a size determined by the vision acquired by the vision measurement interface. The projection processor performs a projection process of projecting the display image generated by the display image generator as a virtual image.