Oscillating Lens Module Counterbalancing Vibration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing oscillating lens modules in projectors cause over-vibration and shaking of the projection image due to resonance from magnetic interactions between coils and other structures, leading to excessive vibrating noise.
Innovation Solution
Incorporating a second coil with an opposite oscillation phase to the first coil, which is connected to the frame and located within a magnetic field, to counterbalance vibrations and prevent them from transferring to other projector structures, ensuring smooth image projection without excessive noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single coil is used to drive the lens to oscillate, then the lens oscillation function is achieved, but the projector experiences over-vibration and image shaking due to resonance
Solution Approach 1:
The patent applies the counterweight principle by introducing a second coil that generates oscillation in the opposite phase to the first coil. The two coils are positioned symmetrically on opposite sides of the optical axis, and when driven with opposite phase signals, they create counterbalancing forces that eliminate the net vibration transmitted to the projector body, thus solving the over-vibration problem while maintaining the lens oscillation function
Solution Approach 2:
The patent utilizes asymmetric positioning of the two coils relative to the optical axis, placing them at different locations but symmetric to each other. This asymmetric yet balanced configuration allows each coil to contribute differently to the overall oscillation while maintaining force balance, enabling effective vibration cancellation through opposite phase operation
2Manufacturing precision
If the coil oscillation is increased to improve image smoothness, then the serration degree is reduced, but the vibrating noise increases
Solution Approach 1:
The patent converts the harmful vibration and noise generated by the oscillating coil into a beneficial effect by using the second coil to generate an opposite phase oscillation. This transforms the harmful resonance into a useful counterbalancing force, where the vibration that would normally cause noise is instead used to cancel out the vibration from the first coil, thereby eliminating noise while maintaining the image smoothing effect
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 counterbalancing mechanism effectively eliminates vibrations within the oscillating lens module, preventing projector over-vibration and image shaking, thus ensuring a stable and noise-free projection image during operation.
Implementation Method 1
the first coil is adapted to be electrified to oscillate about a first axis via the magnetic field
Implementation Method 2
the second coil is adapted to be electrified to oscillate about a second axis via the magnetic field
Data Source
AI summary
The invention discloses an oscillating lens module and a projector. The oscillating lens module includes a frame, a first coil, a lens, and a second coil. The first coil and the second coil are connected to the frame and located in a magnetic field, wherein the first coil and the second coil are adapted to be electrified and to oscillate about a first axis and a second axis respectively via the magnetic field. The lens is connected to the first coil, wherein the lens is adapted to oscillate along with the first coil. An oscillation phase of the second coil is opposite to an oscillation phase of the first coil, such that forces applied on the frame by the first coil and the second coil are counterbalanced, so as to prevent the oscillating lens module from over vibrating which makes projection images shake and makes noise.