Optical Module Magnetic Interference Reduction via Extraction
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Solution Overview
Problem
The challenge in miniaturizing optical modules is the inconsistency in orientation due to magnetic interference between adjacent modules, leading to increased assembly complexity and reduced production speed, as multiple soldering steps are required to adjust each module correctly.
Innovation Solution
The optical module design includes a movable portion with a holder for optical elements, a driving mechanism using magnetic elements, a position-sensing element, and a circuit board with a dentate structure, allowing for precise alignment and movement of optical components while minimizing magnetic interference, thus facilitating assembly and reducing the need for multiple soldering steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If optical modules are miniaturized and assembled in multi-module optical systems, then the size of optical modules is reduced, but magnetic interference occurs between adjacent modules causing orientation inconsistency
Solution Approach 1:
The patent extracts the magnetic element from the driving portion and positions it on the circuit board, separating it from the movable portion. This extraction eliminates the magnetic interference problem that occurred when magnetic elements were integrated into the movable portion, while still enabling driving functionality through the magnetic interaction between the circuit board-mounted magnetic element and the coil in the movable portion.
Solution Approach 2:
The patent introduces the circuit board as an intermediary carrier for the magnetic element. Instead of directly integrating the magnetic element into the movable portion, it places the magnetic element on the circuit board, which acts as a mediator to transmit the magnetic field through the coil to achieve driving while preventing direct magnetic interference between adjacent modules.
2Object-affected harmful factors
If orientation adjustment is performed to avoid magnetic interference, then magnetic interference is prevented, but assembly complexity increases due to multiple soldering steps
Solution Approach 1:
The patent performs preliminary action by pre-positioning the magnetic element on the circuit board in a fixed location before final assembly. This preliminary positioning ensures that the magnetic field orientation is predetermined, allowing the movable portion to be oriented correctly during a single soldering step without requiring subsequent orientation adjustments or multiple soldering operations.
Solution Approach 2:
The patent merges the magnetic element with the circuit board, combining two previously separate components (magnetic element and circuit board) into a single integrated unit. This merging simplifies the assembly process by reducing the number of separate components that need to be positioned and soldered, thereby reducing assembly complexity while maintaining the ability to prevent magnetic interference.
3Ease of manufacture
If circuit components are disposed on the first side only, then assembly is simplified, but space utilization is reduced
Solution Approach 1:
The patent utilizes the third dimension (vertical stacking) by disposing circuit components on both the first side and second side of the circuit board. This dimensional transition from single-sided to dual-sided component placement increases space utilization without complicating the assembly process, as each side can be independently populated with components during the assembly sequence.
Solution Approach 2:
The patent segments the circuit board into two functional sides: the first side for mounting the magnetic element and certain circuit components, and the second side for mounting additional circuit components and the external electrical connection portion. This segmentation allows efficient space utilization while maintaining assembly simplicity by organizing components according to their functional requirements on different sides.
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
This design enables efficient assembly of miniaturized optical modules by preventing magnetic interference and streamlining the assembly process, enhancing production speed and accuracy while maintaining the optical module's functionality.
Implementation Method 1
a driving mechanism, a driving portion including a coil and a driving magnetic element corresponding to the coil, wherein the driving magnetic element is disposed on the circuit board and the coil is wound around the holder
Implementation Method 2
a position-sensing element disposed on the circuit board; wherein the position-sensing element is configured to sense the position of the movable portion relative to the fixed portion
Data Source
AI summary
An optical module includes a first side and a second side, and includes a movable portion, a fixed portion, a driving portion, a position-sensing portion, and a circuit board. The movable portion includes a holder for holding an optical element with an optical axis. The fixed portion includes a base and a circuit component, wherein the circuit component has an external electrical connection portion, and the movable portion is movably connected to the fixed portion. The driving portion is configured to drive the movable portion to move relative to the fixed portion. The position-sensing portion includes a position-sensing element, and the position-sensing element is configured to sense the position of the movable portion relative to the fixed portion. The circuit board is electrically connected to the position-sensing component, and the position-sensing element is disposed on the circuit board; wherein the circuit board is disposed on the first side, and the external electrical connection portion is disposed on the second side.