Elastic Optical Member Vibration Control
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Solution Overview
Problem
Current image display apparatuses with pixel shifters experience unstable optical paths due to unnecessary vibrations, leading to decreased image quality, particularly in high-resolution displays like 4K and 8K resolutions.
Innovation Solution
An optical device with a simple configuration featuring a plate-shaped optical member, an elastic frame, and restricting members that attenuate vibrations, allowing the optical member to swing and control light deflection without inducing unnecessary vibrations, thereby stabilizing the optical path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an optical element is rotated to shift the optical path, then the optical path can be controlled and adjusted, but unnecessary vibrations occur that destabilize the optical path and degrade image quality
Solution Approach 1:
The patent replaces the mechanical rotation system with a piezoelectric actuator that uses elastic deformation to tilt the optical member. The piezoelectric element converts electrical signals directly into precise angular adjustments without mechanical rotation, eliminating vibration issues while maintaining optical path control capability.
Solution Approach 2:
The patent introduces a tilt mechanism as an intermediary between the actuator and the optical member. This tilt mechanism converts linear displacement from the piezoelectric element into angular tilting motion, enabling precise optical path control without direct mechanical rotation that causes vibrations.
2Reliability
If vibration suppression control is added to the pixel shifter, then unnecessary vibrations can be reduced, but the control circuit becomes complicated
Solution Approach 1:
The patent uses the elastic properties of the optical member itself to suppress vibrations, converting what could be a source of instability into a damping mechanism. The elastic material naturally absorbs and dissipates vibrational energy, providing vibration suppression without requiring complex control circuits.
Solution Approach 2:
The optical member's elastic material provides inherent vibration damping capability, allowing the system to suppress unnecessary vibrations through its own physical properties rather than requiring external active control systems. This self-service approach eliminates the need for complicated vibration suppression control circuits.
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 effectively suppresses unnecessary vibrations, ensuring high-image-quality displays with precise control over image shifting, enhancing resolution and reducing defects in high-definition images.
Implementation Method 1
a frame so provided that the frame surrounds side surfaces of the optical member and made of an elastic material more elastic than the optical member
Implementation Method 2
The configuration described above in which the first restricting member and the second restricting member come into contact with each other allows attenuation of produced vibration of the optical member
Implementation Method 3
The optical element is configured to be rotatable around an axis, and the rotation of the optical element causes light passing therethrough to be refracted, resulting in a shift of the optical path
Data Source
AI summary
An optical device includes: an optical member which is formed of a plate-shaped part and on which light is incident; a frame so provided that the frame surrounds side surfaces of the optical member and made of an elastic material more elastic than the optical member; a shaft that supports the optical member and the frame in a swingable manner and is made of the elastic material; a support that supports the shaft; a first restricting member provided on a plate surface of the optical member; and a second restricting member that is provided in a position separate from the optical member and comes into contact with the first restricting member when the optical member and the frame swing.