Imaging Displacement Module Using Elastic Torsion for Projection
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Solution Overview
Problem
Conventional techniques for improving image quality in projection apparatuses by eliminating net-like black areas are hindered by the complexity and bulkiness of vibrating prisms or projection lenses, making mass production impractical.
Innovation Solution
An imaging displacement module that includes a frame, optical element, carrier, connecting portion, and actuators, where the carrier vibrates periodically around the connecting portion to shift the imaging position within each frame time, using voice coil motors or piezoelectric ceramics to drive the optical element, reducing net-like black areas and improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a prism or projection lens is vibrated to eliminate net-like black areas, then image quality is improved, but device complexity and occupied space increase
Solution Approach 1:
The patent segments the heavy projection lens into a lightweight reflective mirror mounted on a carrier, decoupling the vibration function from the heavy optical component. This allows independent vibration of the mirror to achieve image displacement without the complexity of vibrating the entire lens system.
Solution Approach 2:
The patent introduces a reflective mirror as an intermediary element between the light source and projection lens. This mirror serves as a lightweight mediator that can be easily vibrated to achieve image displacement, avoiding the need to directly vibrate the heavy projection lens.
2Manufacturing precision
If a prism or projection lens is vibrated to eliminate net-like black areas, then image quality is improved, but occupied space increases
Solution Approach 1:
The patent separates the vibration function from the heavy projection lens by using a lightweight reflective mirror on a carrier. This segmentation enables the vibration mechanism to be compact and localized, significantly reducing the occupied space compared to vibrating the entire lens assembly.
Solution Approach 2:
The patent replaces the heavy mechanical projection lens with a lightweight reflective mirror system. This substitution dramatically reduces the mass and space requirements for the vibration mechanism, enabling compact implementation while maintaining image quality improvement.
3Speed
If a connecting portion with elastic torsion is used to mount the optical element, then responding speed increases, but manufacturing precision requirements increase
Solution Approach 1:
The patent changes the mounting parameters by using a connecting portion with elastic torsion instead of rigid mounting. This allows the optical element to be mounted with relaxed precision requirements while the elastic connection provides the necessary vibration response at appropriate frequencies.
Solution Approach 2:
The connecting portion combines rigid and elastic properties to create a composite mounting structure. This composite design provides both the structural support needed for stable mounting and the elastic torsion needed for rapid vibration response, balancing manufacturing precision requirements with responding speed.
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 module effectively reduces net-like black areas, enhances image quality, and allows for mass production due to its compact and stable design, with lower material and production costs, and increased responding speed.
Implementation Method 1
the connecting portion connects between the frame and the carrier having an axis thereof, and the connecting portion is capable of generating an elastic torsion around the axis
Implementation Method 2
The first actuator is disposed at a side of the carrier and capable of driving the carrier to vibrate periodically. The first actuator includes a voice coil motor (VCM) or a piezoelectric ceramic (PZT).
Implementation Method 3
The first actuator includes a voice coil motor (VCM) or a piezoelectric ceramic (PZT).
Data Source
AI summary
An imaging displacement module including a frame, an optical element, a carrier, a connecting portion and at least a first actuator is provided. The frame has a first opening, and the optical element, the carrier, the connecting portion and the first actuator are all disposed in the first opening. The carrier is capable of carrying the optical element, and the connecting portion connects between the frame and the carrier and capable of generating an elastic torsion around an axis. The first actuator is disposed at a side of the carrier and capable of driving the carrier to vibrate periodically.