Pivoting HMD Light Shield to Block Glare Without Eyeglass Contact
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Solution Overview
Problem
Existing head-mounted displays (HMDs) face issues with external light interference due to the contact of light-shielding members with the face or eyeglasses, which can hinder the observation experience.
Innovation Solution
A pivotable light-shielding member, such as eyecups, is integrated into the HMD, allowing it to move away from or towards the face, preventing contact with the face or eyeglasses while effectively blocking external light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the light-shielding member is made fixed and contacts the face to block external light, then external light blocking is improved, but comfort and ease of operation deteriorate due to contact with face or eyeglasses
Solution Approach 1:
The light-shielding member is designed to be movable relative to the housing, allowing it to dynamically adjust its position between a retracted state (away from the face) and an extended state (towards the face). This dynamic capability enables the system to block external light when needed while avoiding contact with the face or eyeglasses during normal operation, thus resolving the contradiction between light blocking effectiveness and user comfort.
2Object-affected harmful factors
If the light-shielding member is extended to block external light, then external light blocking is improved, but interference with eyeglasses occurs
Solution Approach 1:
The movable light-shielding member can be dynamically positioned to extend towards the face when external light blocking is required, but retract away from the face when not needed. This dynamic adjustment prevents the light-shielding member from interfering with eyeglasses worn by the user, while still maintaining the capability to block external light when necessary.
3Ease of operation
If the light-shielding member is retracted away from the face, then comfort is improved, but external light blocking capability deteriorates
Solution Approach 1:
The light-shielding member's movable design allows it to be retracted away from the face during normal operation to ensure user comfort and avoid interference with eyeglasses. When external light blocking is needed, the member can be extended towards the face. This dynamic positioning capability maintains both comfort and light blocking capability as needed.
Data Source
AI summary
An image display device, having an optical observation system configured to guide light to eyes of an observer using the image display device, includes a housing, a mounting unit, and a light-shielding member. The housing is provided with the optical observation system. The mounting unit mounts the housing to a head of the observer. The light-shielding member is provided on the housing and blocks external light to be incident between the optical observation system and a face of the observer using the image display device. The light-shielding member is pivotable in a direction away from the face of the observer about a pivot axis extending in an up-down direction and in a direction approaching the face of the observer about the pivot axis.