Camera Driving Module Unitary Base Assembly
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Solution Overview
Problem
Conventional camera driving modules for lens assemblies are bulky and complex to assemble, requiring multiple alignment and calibration steps, which reduces manufacturing efficiency and yield.
Innovation Solution
A camera driving module design that includes a base, a casing, a lens unit, and a focus driving part with a carrier, an AF coil element, permanent magnets, and a Hall element, which simplifies the assembly process and reduces size by using a unitary base and closed-ring side wall structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional lens assemblies use thread structures to assemble lens barrel and lens carrier, then the lens assembly can be assembled, but the size increases and assembling complexity increases
Solution Approach 1:
The patent merges the lens barrel and lens carrier into a unitary base structure, eliminating the need for separate thread structure assembly. The base integrates both components that were previously separate, thereby reducing assembling complexity and overall size while maintaining structural integrity.
Solution Approach 2:
The unitary base serves multiple functions simultaneously: it acts as both the lens barrel and lens carrier, provides structural support, and integrates the mounting structure for the focus driving part. This multi-functionality reduces the number of components and simplifies the assembly process.
2Manufacturing precision
If multiple alignment and calibration steps are used during assembly of camera driver module and lens unit, then movement accuracy and smoothness are achieved, but manufacturing efficiency decreases and yield rate is influenced
Solution Approach 1:
The focus driving part is pre-integrated with the lens unit during manufacturing, with the carrier, permanent magnets, and Hall element positioned in their final configurations. This preliminary integration eliminates the need for subsequent alignment and calibration steps during assembly, thereby improving manufacturing efficiency while maintaining movement accuracy.
Solution Approach 2:
The Hall element is pre-positioned to automatically detect the position of the lens unit relative to the carrier without requiring external calibration. The system self-adjusts and self-calibrates through the magnetic field interaction between the permanent magnets and Hall element, eliminating manual alignment steps.
3Ease of operation
If conventional camera driver modules use multiple components for auto focus, then focusing function is achieved, but the module size increases and assembly complexity increases
Solution Approach 1:
The focus driving part components (carrier, permanent magnets, Hall element) are nested within the lens unit structure. The carrier is disposed on the lens unit, and the permanent magnets are mounted on the carrier, creating a compact nested arrangement that reduces overall module size while maintaining all necessary focusing functions.
Solution Approach 2:
The patent combines multiple focusing components into a single integrated focus driving part assembly. The carrier, permanent magnets, and Hall element are assembled as one unit that attaches to the lens unit, reducing the overall module size compared to conventional designs that use separate components.
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 design reduces assembly complexity and size, improving manufacturing efficiency and yield while maintaining high image quality and accuracy of lens movement.
Implementation Method 1
The AF coil element is fixed to the base, and the AF coil element faces toward the carrier. The permanent magnets are fixed on one side of the carrier facing toward the base... The AF coil element and the corresponding surface of the permanent magnets are arranged in the direction parallel to the optical axis.
Implementation Method 2
The Hall element faces toward the corresponding surface of one of the permanent magnets. The Hall element detects a displacement of the lens unit in parallel with the optical axis according to a position of one of the permanent magnets.
Data Source
AI summary
A camera driving module includes: a base including a central opening; a casing disposed on the base and including an opening hole corresponding to the central opening; a lens unit movably disposed on the casing; and a focus driving part. The focus driving part includes a carrier, an AF coil element, at least two permanent magnets and a Hall element. The carrier is disposed on the lens unit and movable in a direction parallel to an optical axis. The AF coil element is fixed to the base and faces toward the carrier. The permanent magnets are fixed on one side of the carrier facing toward the base and disposed opposite to each other about the optical axis. The Hall element faces toward a corresponding surface of one of the permanent magnets. The AF coil element and the corresponding surfaces are arranged in the direction parallel to the optical axis.