Photographing Module with Folded Optical Axis and VCM Stabilization
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Solution Overview
Problem
Conventional telephoto optical systems face challenges in achieving both compact size and high image quality, often requiring complex structures and increased weight to fold the optical axis, which complicates the lens assembly and fails to meet the requirements of modern electronic devices.
Innovation Solution
A photographing module incorporating a lens assembly, a reflection element, and driving modules such as axial and lateral voice coil motors to move the lens and image sensor elements, with specific geometric configurations and elastic elements to stabilize and rotate components, allowing for compact size and high image quality while simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional telephoto optical systems use a folded optical axis to reduce the dimension of the optical system, then the size of the optical system is reduced, but the structure becomes more complex and weight increases due to the driving unit required to drive the optical axis folding element
Solution Approach 1:
The patent extracts the optical axis folding function from the lens assembly and implements it separately using a reflection element (mirror) positioned outside the lens assembly. This allows the lens assembly to maintain a simpler structure while achieving the compact folded optical path through the external reflection element, thereby reducing overall system complexity while maintaining compact size.
2Reliability
If conventional telephoto optical systems add anti-vibration function to achieve high image quality, then image quality is improved, but the structure becomes more complex and weight increases
Solution Approach 1:
The patent merges the anti-vibration function with the existing optical components by enabling the reflection element and image sensor to serve dual purposes: optical path folding and image stabilization. The driving modules that position these components can perform both functions simultaneously, eliminating the need for separate anti-vibration mechanisms and reducing overall structural complexity.
3Reliability
If conventional optical systems reduce pixel size to improve image quality, then image quality is improved, but the optical system requires longer focal length which increases system size
Solution Approach 1:
The patent uses a folded optical axis configuration with a reflection element to change the spatial arrangement of the optical path. By folding the optical path in a different dimension (using the reflection element to redirect light at an angle), the system achieves a longer effective focal length without proportionally increasing the physical size of the lens assembly, thus maintaining compact dimensions while supporting high-resolution imaging.
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 proposed solution enables a compact and stable photographing module that maintains high image quality by using voice coil motors and geometric configurations to move and stabilize lens and image sensor elements, addressing the complexity and size issues of conventional systems.
Implementation Method 1
The lens element driving module includes an axial voice coil motor, and the lens element driving module drives the lens assembly to move along a lens optical axis of the lens assembly by the axial voice coil motor
Implementation Method 2
The first lateral voice coil motor is configured to drive the carrier to rotate around a first axis, and the first axis passes through the rotating connection part
Implementation Method 3
The second lateral voice coil motor is configured to drive the movable plate to move so that the image sensor can be moved in directions based on the first dynamic axis
Implementation Method 4
The reflection element has a reflection surface. The reflection surface is configured to redirect an incident light traveling along an incident optical axis towards the lens assembly
Data Source
AI summary
A photographing module includes a lens assembly, a reflection element, an image sensor, and lens element, reflection element and image sensor driving modules. An axial voice coil motor of the lens element driving module moves the lens assembly along a lens optical axis. A rotating connection part and a curved recess structure are disposed between a holder and a carrier movable relative to the holder. A lateral voice coil motor of the reflection element driving module drives the carrier carrying the reflection element to rotate around an axis passing through the rotating connection part. A plurality of rollable elements are located between and in contact with the fixed member and the movable plate. A lateral voice coil motor of the image sensor driving module drives the movable plate carrying the image sensor to move based on a dynamic axis orthogonal to the lens optical axis.