Optical Unit Shake Correction Flexible Circuit Board
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Solution Overview
Problem
Existing optical units for cameras, such as those on cell phones, face challenges in preventing image shake due to the rigidity and repulsive forces of cables used for connecting the movable module, which disrupt the swing mechanism intended to correct hand shake.
Innovation Solution
The use of a flexible circuit board as a wiring member that connects the movable module to the outer side, with a low rigidity and small repulsive force, and strategically positioning the connecting portion on the swing center of the movable module relative to the spring member's support center, minimizes displacement and interference with the swing mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cable is used to connect the movable module, then electrical connection is achieved, but the rigidity of the cable disturbs the swing of the movable module
Solution Approach 1:
The patent replaces the rigid cable with a flexible circuit board that has a flexible substrate. This flexible circuit board can bend and deform elastically during the swing movement of the movable module, allowing electrical connection while not disturbing the swing motion. The flexible substrate enables the wiring member to adapt its shape dynamically.
Solution Approach 2:
The patent changes the rigidity parameter of the wiring member by using a flexible circuit board with a flexible substrate instead of a rigid cable. This parameter change allows the wiring member to transition from a rigid state to a flexible state, enabling it to accommodate the swing movement without interfering with the movable module's motion.
2Ease of operation
If a cable is bent to reduce rigidity impact, then swing disturbance is reduced, but repulsive force from cable deformation still disturbs the swing
Solution Approach 1:
The flexible circuit board uses a flexible substrate that can bend without generating significant repulsive force. The flexible nature of the substrate allows it to deform elastically during swing movement without the strong repulsive forces that would be generated by a rigid cable, thus minimizing interference with the movable module's motion.
Solution Approach 2:
The patent replaces the mechanical cable structure with a flexible circuit board that combines electrical connection functionality with flexible mechanical properties. This substitution eliminates the need for separate cable bending mechanisms and reduces mechanical interference through the flexible substrate's ability to deform without strong repulsive forces.
3Ease of manufacture
If the connecting portion is positioned away from the swing center, then wiring is easier to route, but displacement of the wiring member increases during swing
Solution Approach 1:
The patent applies different positioning strategies to different parts of the flexible circuit board. The connecting portion is positioned close to the swing center to minimize displacement during swing, while the extended part can be routed in optimal directions for electrical connections. This local optimization allows the wiring member to maintain stability during motion while achieving proper electrical connectivity.
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 solution effectively prevents the flexible circuit board from disturbing the swing of the movable module, ensuring accurate shake correction and image stability by reducing the impact of its rigidity and repulsive force, even when extended.
Implementation Method 1
a spring member which supports the movable module so as to be capable of displacing with respect to the fixed body
Implementation Method 2
a flexible circuit board which is connected with the movable module, the flexible circuit board including a movable side connecting part connected with the movable module and an extended part extended from the movable side connecting part
Data Source
AI summary
Disclosed is an optical unit with a shake correction function which is capable of suppressing interference with swinging of a movable module due to the rigidity of a wiring material and a repelling force generated when the wiring material is deformed, even when the wiring material is extended from the movable module. The optical unit uses a flexible wiring board as the wiring material for electrically interconnecting the movable module and outside. In the flexible wiring board, the connecting portion of a movable-side connecting section and an extending unit is provided, in the optical axis direction, on a side where the swing center of the movable module is positioned with respect to the position of the center of supporting a spring member to the movable module. The swing center, the connecting portion, and a fixed-side connecting section are at the same position in the optical axis direction.