Optical Device Unit Vibration Isolation via Segmented Support
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Solution Overview
Problem
Existing optical device units for shifting the optical axis of image light suffer from noise generation due to vibration transmission, which is not adequately addressed in existing technologies.
Innovation Solution
An optical device unit with a light transmissive plate and a support structure that isolates vibrations from the coupler, using pivot portions and a support portion with connection points located away from the coupler, preventing vibration transmission and allowing quiet operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wobbling device is supported by a support body, then the optical device can be stabilized, but vibrations of the wobbling device are transmitted to the support body, generating unusual noise
Solution Approach 1:
The support body is divided into multiple support portions that are spatially separated from the coupler. Each support portion independently supports pivot portions, creating segmentation in the vibration transmission path. This segmentation prevents vibrations from being transmitted to the coupler while maintaining optical device stability.
Solution Approach 2:
The support portions act as intermediary elements between the pivot portions and the coupler. By positioning these support portions away from the coupler, they serve as intermediate support structures that prevent direct vibration transmission to the coupler, thus reducing noise while maintaining stability.
2Volume of moving object
If the connection portions are located close to the coupler, then the structure is compact, but vibrations are readily transmitted to the coupler
Solution Approach 1:
The connection portions are positioned in a different spatial dimension relative to the coupler, specifically away from it in the support body structure. This dimensional arrangement allows vibrations to be isolated in certain directions while maintaining overall structural compactness.
3Object-generated harmful factors
If the support portion is separated from the coupler, then vibration transmission is reduced, but the planar expansion of the optical device unit increases
Solution Approach 1:
The support body exhibits local quality differentiation where support portions are positioned away from the coupler in specific regions. This localized arrangement provides vibration isolation at critical points while maintaining compact dimensions in other areas, thus reducing overall planar expansion.
4Object-generated harmful factors
If the support portion is separated from the coupler in the in-plane direction, then vibration transmission is reduced, but the thickness of the optical device unit increases
Solution Approach 1:
The support structure is segmented into multiple support portions distributed in the thickness direction rather than being concentrated in the in-plane direction. This segmentation allows vibration isolation without significantly increasing the overall thickness of the optical device unit.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The optical device unit operates quietly by isolating vibrations, reducing noise and maintaining image quality through effective optical axis shifting, enhancing the reliability of image display apparatuses.
Implementation Method 1
The optical portion be light transmissive. In this case, the optical axis of light can be shifted by using refraction.
Data Source
AI summary
An optical device unit that can operate very quietly and an image display apparatus having the optical device unit are provided. An optical device unit includes an optical device and a coupler joined to the optical device. The optical device includes an optical portion that is shaped as a plate and has a light incident surface on which light is incident, a movable portion that supports the optical portion, pivot portions that support the movable portion, and a support portion that supports the pivot portions. The support portion includes connection portions to which the pivot portions are connected and the connection portions are located away from the coupler.