Camera Actuator Resultant Force Lens Displacement
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Solution Overview
Problem
Existing camera modules struggle to accurately displace lenses during autofocusing and shake correction, as existing actuators lack precision in controlling lens movement in specific directions.
Innovation Solution
A camera actuator system comprising a fixed-side member, a movable-side member holding a lens, and a driving section that generates a resultant force combining thrust and resistance forces to accurately displace the lens in specific directions, orthogonal to each other, using a combination of AF and OIS actuators to ensure precise movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional actuators are used for lens displacement, then the camera module can perform autofocusing and shake correction, but the lens displacement accuracy in specific directions deteriorates
Solution Approach 1:
The driving section is divided into multiple independent actuators (first actuator for thrust in optical axis direction, second actuator for thrust in orthogonal direction, and third actuator for resistance force). Each actuator is responsible for a specific directional component, allowing precise control of lens displacement in predetermined directions without interference from other movements.
2Measurement precision
If multiple actuators are combined to improve directional precision, then lens displacement accuracy improves, but device complexity increases
Solution Approach 1:
The driving section uses a combination of actuators that can serve multiple functions: the first and second actuators provide thrust in different directions for both autofocusing and shake correction, while the third actuator provides resistance force for stabilization. This multi-functional design achieves precise directional control without requiring completely separate systems for each function.
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 accurate and precise displacement of lenses in specific directions, enhancing autofocusing and shake correction capabilities, reducing deviations and improving overall camera performance.
Implementation Method 1
the driving section generates as the driving force a resultant force obtained by combining thrust that displaces the movable-side member in a specific direction that is either the first direction or the second direction, and a resistance force that resists an external force acting so as to cause the movable-side member to deviate from the specific direction
Data Source
AI summary
A camera actuator comprises: a fixed-side member; a movable-side member provided so as to be displaced in relation to the fixed-side member, the movable-side member holding a lens unit; and a drive unit that generates drive force to displace the movable-side member within a plane including a first direction and a second direction orthogonal to the first direction, the drive unit generating as drive force a combined force obtained by combining a propulsion force that displaces the movable-side member in a specified direction that is either the first direction or the second direction, and a resistance force that resists an external force acting so as to cause the movable-side member to deviate from the specified direction.