Optical Element Drive Structure for Miniaturized Flat Camera Modules
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Solution Overview
Problem
The challenge of miniaturizing optical element driving mechanisms and improving their flatness in electronic devices with image-capturing or video-recording functions has not been adequately addressed.
Innovation Solution
The optical element driving mechanism incorporates a movable portion connected to a fixed portion with a sensing assembly, utilizing magnetic elements and adhesive elements for precise positioning and closed-loop control, along with a unique configuration of openings and protrusions to enhance rigidity and flatness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the optical element driving mechanism is miniaturized, then the device size is reduced, but the structural integrity and flatness deteriorate
Solution Approach 1:
The mechanism is divided into a fixed portion and a movable portion with distinct functions. The fixed portion provides structural support while the movable portion enables optical element actuation, allowing miniaturization without compromising overall stability
Solution Approach 2:
Different regions of the mechanism have different structural properties optimized for their specific functions. The fixed portion has higher rigidity for stability, while the movable portion has controlled flexibility for precise movement, resolving the contradiction between size reduction and structural integrity
2Volume of moving object
If the optical element driving mechanism is miniaturized, then the device size is reduced, but the manufacturing precision deteriorates
Solution Approach 1:
A sensing assembly detects the position of the movable portion and provides feedback signals. This closed-loop control system compensates for manufacturing tolerances and ensures precise positioning of the optical element even in the miniaturized structure
Solution Approach 2:
Traditional mechanical positioning mechanisms are replaced with a sensing assembly that uses magnetic fields or other non-contact methods to detect and control position, reducing mechanical complexity and improving positioning precision in the miniaturized device
3Ease of manufacture
If adhesive elements are used to fix magnetic elements, then the assembly is simplified, but the positioning precision may be affected
Solution Approach 1:
Positioning structures are pre-formed on the circuit component before the adhesive curing process. This preliminary positioning ensures that when adhesive elements are used to simplify assembly, the magnetic elements are already correctly positioned, maintaining both ease of manufacture and positioning precision
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 configuration achieves miniaturization and improved flatness of the optical element driving mechanism, ensuring precise movement and stability of optical elements while reducing weight and enhancing structural integrity.
Implementation Method 1
The sensing assembly includes a first magnetic element and a second magnetic element. The first magnetic element and the second magnetic element are arranged on both sides of the first opening of the movable portion.
Implementation Method 2
The first adhesive element is disposed between the first magnetic element and the movable portion. The first adhesive element is cured by thermosetting.
Implementation Method 3
The second adhesive element is disposed on the edge of the first magnetic element. The second adhesive element is cured by ultraviolet curing.
Data Source
AI summary
An optical element driving mechanism is provided. The optical element driving mechanism includes a movable portion, a fixed portion and a sensing assembly. The movable portion is connected with an optical element. The movable portion is movable relative to the fixed portion. The sensing assembly senses whether the movable portion is in a first position relative to the fixed portion.