Projector Optical Path Changer Vibration Absorption
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Solution Overview
Problem
Existing projectors with liquid crystal panels face challenges in maintaining high image resolution while minimizing operating noise due to vibration transmission from the optical device to the enclosure.
Innovation Solution
A projector design incorporating an optical path changer with a swingable optical member and a vibration absorbing member that links the image formation unit and projection optical unit, using magnetic drivers for actuation and elastic materials for vibration absorption, to shift the optical path and suppress vibration propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the optical path changer is fixed to the enclosure via a fixing section, then the optical device is securely mounted, but vibration is transmitted to the enclosure producing operating noise
Solution Approach 1:
The patent introduces a vibration absorbing member as an intermediary element between the optical path changer and the enclosure. This member includes a vibration absorbing section that contacts the optical path changer and transmits only light while absorbing vibration, and a wall section that protrudes to contact the enclosure. This mediator prevents direct rigid contact, allowing secure mounting while blocking vibration transmission to the enclosure, thereby eliminating operating noise.
2Device complexity
If the optical path changer is directly mounted to the linkage frame, then the structure is simple, but vibration is transmitted causing noise
Solution Approach 1:
The vibration absorbing member serves as a mediator between the optical path changer and the linkage frame. It comprises a vibration absorbing section that contacts the optical path changer and a wall section that contacts the linkage frame, with the vibration absorbing section positioned between them. This intermediate structure prevents direct rigid mounting while maintaining structural connection, thereby reducing vibration transmission and operating noise without significantly increasing device complexity.
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 solution enables the projection of high-resolution images while significantly reducing operating noise, maintaining quietness and preventing vibration-induced noise without increasing the projector's size.
Implementation Method 1
a vibration absorbing member that absorbs vibration generated by the optical path changer
Implementation Method 2
using elastic materials for vibration absorption
Data Source
AI summary
A projector according to an aspect of the present disclosure includes an optical path changer that is provided between an image formation unit and an projection optical unit and changes the optical path of image light from the image formation unit, a linkage frame that links the image formation unit and the projection optical unit to each other, and a vibration absorbing member that absorbs vibration generated by the optical path changer. The optical path changer includes a base member, an optical member, and a swing frame that supports the optical member and is swingably supported relative to the base member. The vibration absorbing member has vibration absorbing surfaces that are in contact with the base member of the optical path changer, and the vibration absorbing surfaces are in contact with support surfaces of the linkage frame to cause the support surfaces to support the optical path changer.