Imager Support Flex Layout for Faster Shake Correction
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Solution Overview
Problem
Existing image shake correction devices face challenges in improving drive response characteristics and reducing power requirements due to the influence of gravity on movable members, particularly when these members are supported to move in directions parallel to the gravity direction.
Innovation Solution
A movable support device comprising a movable unit with flexible substrates and a support member that allows the imager to move in a longitudinal and short direction of its light receiving surface, with specific configurations of folded portions and wirings to minimize elastic force and enhance drive response, while reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a flexible print substrate is drawn in up, down, left, and right directions of the camera module to hold the movable member at a neutral position, then the movable member can be maintained at neutral position due to elastic force, but the elastic force acts in a direction that hinders driving and reduces drive response characteristics
Solution Approach 1:
The flexible print substrate is divided into multiple independent drawing directions (up, down, left, right), with each direction's substrate having its elastic force independently adjusted. This segmentation allows the elastic forces to balance each other at the neutral position while minimizing the net hindering effect on driving in any single direction.
Solution Approach 2:
The elastic force parameters of the flexible print substrate are adjusted by controlling the drawing tension and direction during manufacturing. By optimizing these parameters, the substrate provides sufficient restoring force to maintain neutral position while minimizing the hindering elastic force that opposes driving motion.
2Stability of the object's composition
If the movable member is driven in a direction opposite to gravity to cancel movement due to gravity, then the movable member can be kept at neutral position, but the power required for driving increases
Solution Approach 1:
The flexible print substrate acts as an elastic counterweight mechanism, using its elastic force to counterbalance the gravitational force on the movable member. This eliminates the need for continuous active driving to maintain neutral position, thereby reducing power consumption.
Solution Approach 2:
The flexible print substrate provides self-service by automatically generating the restoring force needed to return the movable member to neutral position after displacement, without requiring additional power input for position maintenance.
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 solution improves drive response characteristics and reduces power requirements for image shake correction, enabling more efficient movement of the movable member while maintaining accurate position detection and image quality.
Implementation Method 1
the first flexible substrate includes a first portion extending in one direction of the short direction and a folded portion folded at an end portion of the first portion in the other direction of the short direction
Data Source
AI summary
A movable support device includes: a movable unit that includes an imager, a first flexible substrate including wirings connected to terminals other than a power supply terminal and a ground terminal among terminals of the imager, and a second flexible substrate including wirings connected to the power supply terminal and the ground terminal; and a support member that supports the movable unit to be movable in a longitudinal direction of a light receiving surface of the imager and a short direction of the light receiving surface, the first flexible substrate includes a first portion extending in one direction of the short direction and a folded portion folded at an end portion of the first portion in other direction of the short direction, and the second flexible substrate includes a second portion and a folded portion as defined herein.