Independent Optical Module Adjustments for HMD Clarity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing head-mounted display apparatuses can only synchronously adjust the sight distance of the left and right lens barrel assemblies, leading to uneven image sharpness and pupillary distance adjustments that affect the display effect.
Innovation Solution
An optical module with separate sight distance and pupillary distance adjusting mechanisms for each lens barrel assembly, allowing independent adjustments of the sight distance and pupillary distance for each eye, using mechanisms like synchronous gears and belts to move the lens barrels relative to the display screens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If synchronous adjustment mechanism is used for sight distance, then the structure is simple, but the image sharpness becomes uneven for users with different diopters
Solution Approach 1:
The patent divides the adjustment mechanisms into independent left and right systems. The left lens barrel assembly has its own sight distance adjusting mechanism, and the right lens barrel assembly has its own sight distance adjusting mechanism. This segmentation allows each eye to be adjusted independently according to the user's specific diopter requirements, resolving the contradiction between structural simplicity and image sharpness uniformity.
2Adaptability or versatility
If pupillary distance adjusting mechanism moves lens barrels, then pupillary distance can be adjusted, but the optical centers change relative to the display screens
Solution Approach 1:
The patent implements independent pupillary distance adjusting mechanisms for the left and right lens barrel assemblies. Each mechanism can adjust its corresponding lens barrel assembly independently, allowing the optical centers to be repositioned relative to each other without affecting the display screen positions, thus maintaining optical center position accuracy while achieving pupillary distance adjustment capability.
Solution Approach 2:
The pupillary distance adjusting mechanisms are designed to perform multiple functions: adjusting the distance between the left and right lens barrel assemblies, positioning the optical centers relative to the display screens, and accommodating different pupillary distances. This multi-functionality resolves the contradiction between adaptability and precision.
3Device complexity
If existing pupillary distance adjusting mechanism is used, then the mechanism structure is simple, but separate adjustment of left and right lens barrel assemblies is not possible
Solution Approach 1:
The patent divides the pupillary distance adjustment system into separate left and right mechanisms. The left pupillary distance adjusting mechanism is connected to the left lens barrel assembly, and the right pupillary distance adjusting mechanism is connected to the right lens barrel assembly. This segmentation enables independent adjustment of each lens barrel assembly, achieving the desired adaptability while maintaining reasonable structural complexity.
Data Source
AI summary
The invention discloses an optical module and a head-mounted display apparatus. The optical module includes a left/right lens barrel mechanism, a left/right sight distance adjusting mechanism, and a left/right pupillary distance adjusting mechanism; The left lens barrel mechanism includes a left lens barrel assembly and a left display screen disposed behind the left lens barrel assembly through a left screen bracket; The left sight distance adjusting mechanism adjusts the distance between the left display screen and the left lens barrel assembly; The left pupillary distance adjusting mechanism drives the left lens barrel mechanism to move left and right. Symmetrically, the structure of the right side is the same as left. The optical module adjusts the sight distance/pupillary distance of left and right eye separately by the left and right sight distance adjusting mechanism/pupillary distance adjusting mechanism, so that images seen by both eyes are clearer.