Optical Element Drive With 2D Motion for Thin Zoom Modules
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Solution Overview
Problem
The integration of longer focal length optical elements in electronic devices, such as lenses, increases device thickness, compromising lightweight and stability objectives, necessitating an optical element driving mechanism that reduces weight and enhances stability.
Innovation Solution
An optical element driving mechanism comprising a movable part, frames, driving assemblies, sensing assemblies, and a control unit, utilizing electromagnetic forces to adjust optical elements in two dimensions, allowing for precise movement and aperture control, thereby optimizing optical performance without increasing device thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If longer focal length optical elements are integrated into electronic devices, then optical quality and photography capabilities are improved, but device thickness increases
Solution Approach 1:
The patent transitions from single-dimensional linear movement of optical elements to two-dimensional movement control. By adding a second frame and driving unit that operate perpendicular to the first driving assembly, the system achieves optical zoom and focal length adjustment without increasing the linear thickness of the device, as movements occur in multiple dimensions within the same space.
Solution Approach 2:
The patent implements a nested structure where the first frame and driving assembly are positioned within the optical module, and the second frame and driving unit are integrated into the same space. The mobile part connects to both driving assemblies, allowing nested arrangement of multiple driving mechanisms without increasing overall device thickness.
2Illumination intensity
If longer focal length optical elements are integrated into electronic devices, then photographic capabilities are improved, but device weight increases
Solution Approach 1:
The patent divides the optical element driving function into two separate driving assemblies: a first driving assembly for controlling movement in a first dimension, and a second driving unit for controlling movement in a second dimension. This segmentation allows each component to be optimized independently and reduces the overall weight compared to a single heavy linear driving mechanism.
3Illumination intensity
If optical elements are made movable for zoom adjustment, then optical performance is improved, but device stability is compromised
Solution Approach 1:
The patent incorporates a first sensing assembly that senses the movement of the movable part and a second sensing assembly that senses the movement of the mobile part. These sensing assemblies provide feedback to the control unit, which adjusts the driving signals to maintain precise positioning and stability during optical element movement, preventing unwanted vibrations or position drift.
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 solution enables the adjustment of optical zoom and focal length, improving photographic capabilities while maintaining device stability and reducing weight, thus addressing the challenge of integrating longer focal length optical elements without compromising device design.
Implementation Method 1
The first coil has a first section, a second section, and a third section. The magnetic element has a magnetic element surface facing the first section. The second coil corresponds to the magnetic element... The driving assembly drives the movable part to move relative to the first frame
Implementation Method 2
The first coil has a first section, a second section, and a third section. The magnetic element has a magnetic element surface facing the first section. The second coil corresponds to the magnetic element... When viewed along a direction perpendicular to the magnetic element surface, the magnetic element surface does not overlap with the third section
Data Source
AI summary
An optical element driving mechanism is provided, including a movable part, a first frame, a driving assembly, and a first sensing assembly. The movable part is for connecting an optical element. The movable part may move relative to the first frame. The driving assembly drives the movable part to move relative to the first frame. The first sensing assembly is for sensing the movement of the movable part.