Adjustable Display Module for Myopic Vision in AR Headsets
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Solution Overview
Problem
Existing AR glasses often present unclear content for nearsighted users due to a fixed object distance between the screen and optical lens, and current solutions like adaptive myopia lenses make the devices bulky and uncomfortable to wear.
Innovation Solution
A head-mounted display device with a lens barrel assembly and an adjusting device that allows the display module to move closer to or farther from the optical lens group, enabling adjustable object distance through a reciprocating linear motion driven by a driving device, support, and transmission mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If adaptive myopia lenses are placed in front of AR glasses, then image clarity for nearsighted users is improved, but device bulkiness and structural complexity increase
Solution Approach 1:
The patent implements a movable display module that can adjust its position relative to the optical lens group along the optical axis. This dynamic adjustment mechanism allows the object distance to be changed, enabling clear images for users with different degrees of myopia without requiring additional fixed corrective lenses. The display module is driven by a driving device that moves it between multiple positions, transforming a static structure into a dynamic one that adapts to different user needs.
2Manufacturing precision
If adaptive myopia lenses are placed in front of AR glasses, then image clarity for nearsighted users is improved, but the device becomes bulky and uncomfortable to wear
Solution Approach 1:
The patent uses a dynamic adjustment mechanism where the display module can move along the optical axis to change object distance. This eliminates the need for heavy, fixed adaptive myopia lenses that would be placed in front of the AR glasses. The driving device and movable support structure enable weight reduction while maintaining image clarity for nearsighted users through positional adjustment rather than optical correction.
3Device complexity
If the object distance is fixed in AR glasses, then device structure is simplified, but image clarity for nearsighted users deteriorates
Solution Approach 1:
The patent transforms the fixed object distance design into a dynamic adjustable one. The display module is equipped with a driving device that enables it to move along the optical axis, changing the object distance between the display module and the optical lens group. This dynamic structure maintains relative simplicity while solving the image clarity issue for nearsighted users through adjustable positioning rather than complex optical systems.
Data Source
AI summary
A head-mounted display device, comprising a holder, a lens barrel assembly provided on the holder, and an adjusting device. The lens barrel assembly comprises a lens barrel, a display module provided in the lens barrel, and an optical lens group provided at one end of the lens barrel, wherein the optical lens group comprises at least one optical lens. The adjusting device comprises a driving device provided on the holder, a support provided in the lens barrel and fixedly connected to the display module, and a transmission device. The transmission device is configured to be capable of driving the support to do a reciprocating linear motion under a driving of the driving device, so that the display module is close to or away from the optical lens group.