Liquid Lens Motor Guide Ball Structure for Precise AF and OIS
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Solution Overview
Problem
The deformation of the guide elastic piece in conventional motors for liquid state camera lenses results in a counterforce that reduces the driving force, affecting the accuracy of auto focus and optical image stabilization.
Innovation Solution
A motor design with independently controllable sub-motors, featuring a fixed and movable guide member with guide balls, a connecting arm, and a closed magnetic circuit, reduces friction and ensures precise movement for auto focus and optical image stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a guide elastic piece is used to guide the movable member, then the movable member can be guided in the optical axis direction, but the deformation of the guide elastic piece produces a counter force that reduces the driving force
Solution Approach 1:
The patent extracts and removes the guide elastic piece from the system, replacing it with a guide member structure consisting of guide grooves and guide balls. This eliminates the source of the counter force while maintaining the guiding function through a different mechanical structure that does not deform elastically under load.
Solution Approach 2:
The patent introduces guide balls as intermediary elements between the movable member and the guide grooves. These guide balls roll within the guide grooves, providing smooth guidance while minimizing friction and eliminating the elastic deformation issues that caused the counter force problem.
2Adaptability or versatility
If the guide elastic piece deforms in the optical axis direction, then it can accommodate movement, but the counter force counteracts the driving force resulting in insufficient driving force
Solution Approach 1:
The patent replaces the elastic deformation mechanism with a rigid guide structure consisting of guide grooves and guide balls. This mechanical substitution eliminates the counter force generated by elastic deformation while maintaining the ability to accommodate movement through the controlled rolling motion of the guide balls within the guide grooves.
3Speed
If friction is reduced through guide balls, then the movable member moves more smoothly, but the device complexity increases
Solution Approach 1:
The patent segments the guiding function into separate components: guide grooves formed on the guide member and guide balls that roll within these grooves. This segmentation allows each component to be optimized for its specific function while maintaining overall structural integration, reducing the actual increase in complexity despite the improved movement smoothness.
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 motor design ensures accurate and efficient auto focus and optical image stabilization by minimizing friction and maintaining consistent driving force, enhancing imaging quality.
Implementation Method 1
The guide balls arranged between the fixed guide member and the movable guide member are configured to reduce a friction force during movement of the movable guide member
Implementation Method 2
the coil can generate a magnetic field when energized, and the magnet can move relative to the coil under an action of the magnetic field
Data Source
AI summary
Disclosed are a motor for driving a liquid state camera lens. Includes at least one sub-motor, the sub-motor is independently controllable, and includes: a fixed member part; a movable member part movable relative to the fixed member part in an optical axis direction of the liquid state camera lens, where the fixed member part includes a fixed guide member, the movable member part includes a movable guide member, a connecting arm, and a plurality of guide balls, and the plurality of guide balls are arranged between the fixed guide member and the movable guide member; the connecting arm is arranged at an end of the movable guide member facing the liquid state camera lens; the movable guide member drives the rigid connecting arm to squeeze the liquid state camera lens when subjected to a force in the optical axis direction; and a driving circuit part.