Camera Shaking Corrector Gravity Compensation Spring
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Solution Overview
Problem
Conventional camera modules require a motor with excessive driving force to compensate for gravity during shaking correction, leading to increased size and power consumption, as the influence of gravity on the shaking corrector is not adequately considered.
Innovation Solution
A camera device with a gravity compensation method that includes a movable portion supported by a gravity compensation spring, which offsets the component force of gravity perpendicular to the optical axis, reducing the driving force required for shaking correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motor provides sufficient driving force to counteract gravity during shaking correction, then the shaking correction function can be maintained in any orientation, but the motor size and power consumption increase
Solution Approach 1:
The patent introduces a gravity compensation mechanism that generates a counterbalancing force equal to the component of gravity acting on the imaging element unit in the direction perpendicular to the optical axis. This counterweight mechanism offsets the gravitational effect, allowing the motor to only provide the force necessary for shaking correction without needing to continuously counteract gravity, thereby reducing motor size and power consumption while maintaining shaking correction reliability in any orientation
2Reliability
If the motor provides sufficient driving force to counteract gravity during shaking correction, then the shaking correction function can be maintained in any orientation, but the power consumption increases
Solution Approach 1:
The gravity compensation mechanism generates a counterbalancing force that offsets the gravitational component acting on the imaging element unit. This allows the motor to operate only for active shaking correction movements rather than continuously fighting gravity, significantly reducing power consumption while maintaining the reliability of the shaking correction function across all orientations
3Reliability
If the motor size is increased to provide greater driving force for gravity compensation, then the shaking correction performance improves, but the device complexity increases
Solution Approach 1:
The patent divides the force generation function into two separate components: a gravity compensation mechanism that handles the static gravitational load, and a motor that handles only the dynamic shaking correction. This segmentation allows each component to be optimized independently, with the motor being smaller and less complex since it only needs to provide force for correction movements rather than continuous gravity opposition
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 approach reduces the driving force needed for shaking correction, enabling a smaller and more energy-efficient motor, thereby extending the lifespan of the camera device and maintaining image quality.
Implementation Method 1
a gravity support that supports the movable portion in a direction opposite to a direction of a component force of the gravity with a force equal to a component force of gravity applied to the movable portion along a direction perpendicular to the optical axis of the lens unit
Implementation Method 2
a gravity compensation spring, which offsets the component force of gravity perpendicular to the optical axis
Data Source
AI summary
A camera device includes an image sensor which images a subject, a lens unit that includes a lens for forming an image of the subject on a light receiving surface of the image sensor, a shaking corrector that includes a movable portion that includes the image sensor and moves the movable portion in a direction perpendicular to an optical axis of the lens unit according to shaking of the camera device to correct shaking, and a gravity support that supports the movable portion in a direction opposite to a direction of a component force of the gravity with a force equal to a component force of gravity applied to the movable portion along a direction perpendicular to the optical axis of the lens unit.