Camera Shake Correction Stage with Lateral Control Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing camera shake correction apparatuses face challenges in miniaturization due to the positioning of coils and control circuit boards, leading to complications in linear movement and increased production costs, while also being unable to precisely correct camera shake in all directions.
Innovation Solution
A stage apparatus with a magnetic force generator, a movable stage member, and a control circuit board positioned laterally, where the coils are placed on opposite sides of the center with respect to the control circuit board, and flexible printed circuit boards are used to connect components, allowing for linear movement despite differing distances from the center of gravity, and a driving force reducer is employed to maintain equal driving force across coils.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the control circuit board is positioned immediately at the rear of the rear yokes, then the electrical connection between coils and control circuit is simplified, but the thickness of the camera shake correction apparatus increases
Solution Approach 1:
The control circuit board is repositioned from a rear-positioned configuration to a lateral-side configuration relative to the stage member. This spatial rearrangement in a different dimension allows the FPC board to connect to the lateral side of the stage member, reducing the thickness direction length while maintaining electrical connectivity through optimized FPC routing.
2Device complexity
If coils are positioned at different distances from the center of gravity, then the structure can be simplified, but the stage plate cannot move linearly in the intended direction
Solution Approach 1:
The patent intentionally employs asymmetric coil positioning where coils are placed at different distances from the center of gravity of the integrated movable body. This asymmetric arrangement is compensated by adjusting the number of coil windings or applying different currents to each coil, allowing linear movement while simplifying the overall structure compared to symmetric positioning requirements.
Solution Approach 2:
The patent adjusts parameters such as the number of coil windings or current magnitude for coils positioned at different distances from the center of gravity. By changing these electrical parameters, the driving forces are balanced to achieve linear movement of the stage plate despite the asymmetric physical positioning of the coils.
3Volume of moving object
If the apparatus is miniaturized, then the camera size is reduced, but the FPC board may touch the stationary support plate causing abrasion and damage
Solution Approach 1:
The FPC board is configured to extend into a recess formed in the stationary support plate, creating a protective intermediary structure. This recess acts as a protective cavity that prevents the FPC board from contacting and being abraded by the stationary support plate or other components, thereby protecting the flexible circuit board while maintaining a compact apparatus size.
4Manufacturing precision
If multiple different specification coils are used to achieve precise movement, then the movement precision is improved, but the production cost increases
Solution Approach 1:
The patent employs coils with uniform specifications (same number of windings, same dimensions) positioned asymmetrically relative to the center of gravity. By using homogeneous coil components rather than heterogeneous ones, the production cost is reduced while the desired movement precision is achieved through careful positioning and electrical parameter adjustment rather than component specification variation.
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
Enables a slimmed-down camera shake correction apparatus that can precisely correct camera shake in multiple directions while maintaining component protection and reducing production costs.
Implementation Method 1
a coil, which produces a driving force upon a supply of electric current thereto, positioned within a magnetic field produced by the magnetic force generator
Data Source
AI summary
A stage apparatus includes a stationary support plate, magnetic force generators immovable relative to the stationary support plate, a stage member, an image sensor fixed to the stage member, a control circuit board connected to a side of the stage member, and coils which produce a driving force upon a supply of electric current thereto, the coils being fixed to the stage member at an opposite side of the center of the stage member with respect to the control circuit board, and a FPC board between the stationary support plate and the stage member. The stationary support plate is recessed, from a lateral edge of the stationary support plate at which the control circuit board is provided, in a direction toward the coils and includes an FPC board escape recess, in which said FPC board is partially positioned.