HMD Display Position Adjustment for Eyesight Correction
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Solution Overview
Problem
Conventional Head-Mounted Display (HMD) apparatuses require adjustable lens distances to accommodate different users' eyesight, leading to reduced screen immersion, discomfort due to close eye relief, and the need for separate lens barrels or frequent lens replacements.
Innovation Solution
A HMD apparatus with a face plate and support part that includes display position adjustment units and a lens adjustment unit, allowing the display to be moved relative to the user's eyes without adjusting lens distance, and enabling correction of image blurring due to eyesight differences, thus providing a universal fit without specific head mounts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the lenses are moved toward the display to adjust for user's eyesight, then the lens distance is adjusted, but the area of the display to be viewed by the user is reduced, reducing immersion
Solution Approach 1:
The patent separates the display adjustment function from the lens adjustment function. The display can be independently moved toward or away from the user's eyes through a display position adjustment unit, while the lenses remain fixed in their optimal position relative to the user's eyes. This segmentation allows each component to be adjusted independently, resolving the contradiction between lens distance adjustment and display viewing area.
2Adaptability or versatility
If the lenses are moved toward the user's pupils to adjust for user's eyesight, then the eye relief distance is reduced, but the surface may contact the user's eye lashes, causing discomfort
Solution Approach 1:
The patent divides the optical system into separate adjustable components: the display position adjustment unit and the fixed lens assembly. By keeping the lenses at a fixed distance from the user's pupils and only adjusting the display position, the system achieves eyesight adaptation without the harmful effect of lens contact with eye lashes.
3Manufacturing precision
If separate lens barrels are fabricated for each user's sight, then the eyesight correction is accurate, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent implements a universal lens assembly that can serve all users regardless of their eyesight requirements. The multi-functionality is achieved by adding a display position adjustment unit that can be tuned by each user independently, allowing a single lens design to accommodate various eyesight conditions without requiring multiple specialized lens barrels.
Solution Approach 2:
Each user can independently adjust the display position to suit their own eyesight requirements through the display position adjustment unit. This self-service mechanism eliminates the need for manufacturers to create customized lens barrels for each user, reducing device complexity while maintaining eyesight correction accuracy.
4Manufacturing precision
If lenses are replaced according to user's sight, then the eyesight correction is achieved, but the time and frequency of replacements increase
Solution Approach 1:
The display position adjustment unit enables each user to independently configure the display to their eyesight requirements without requiring lens replacement. This self-service adjustment mechanism eliminates the time loss associated with frequent lens replacements while maintaining accurate eyesight correction.
Data Source
AI summary
A head-mounted display apparatus including a face plate having a first surface formed to face a user's face, and a support part configured to be coupled with at least a part of the face plate so as to allow the face plate to be fixed on the user's face. A cavity structure may be formed on second surface of the face plate which is opposite to the first surface so as to mount an external electronic device to the head mounted display apparatus. One or more position adjustment units are configured to adjust a position of the external electronic device and may be formed on at least one side surface of the face plate.