Optical Element Drive Layout for Long Focal Length in Thin Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge is to design an optical element driving mechanism that enables the miniaturization of electronic devices while accommodating optical elements with long focal lengths without increasing the device's thickness.
Innovation Solution
The proposed optical element driving mechanism includes a movable part connected to the optical element, a fixed part, and a driving assembly that allows the movable part to move relative to the fixed part in specific dimensions, utilizing a sensing assembly and a stopping assembly to control the movement accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an optical element with a long focal length is provided in an electronic device, then the optical performance is improved, but the thickness of the electronic device is increased
Solution Approach 1:
The patent transforms the optical path from a linear arrangement (increasing thickness) to a folded arrangement using reflective surfaces. The light path is bent at angles to achieve a long focal length within a compact thickness, effectively moving the solution from one dimension (thickness) to another dimension (lateral space).
Solution Approach 2:
The optical system embeds multiple optical elements and reflective surfaces within a compact structure. The light path is folded back on itself, creating a nested arrangement where the optical trajectory is contained within a small physical envelope, allowing long focal length without proportional increase in device thickness.
2Adaptability or versatility
If the movable part is allowed to move freely in multiple dimensions, then the adjustment range is improved, but the control precision is reduced
Solution Approach 1:
The patent divides the movement control into separate independent axes (first dimension and second dimension). Each axis is controlled by dedicated driving assemblies, allowing precise control of each degree of freedom separately. This segmentation enables full adjustment range while maintaining high precision for each individual movement parameter.
Solution Approach 2:
The system employs dynamic control where the movable part can be positioned at any location within the adjustment range by coordinating movements along different dimensions. The driving assemblies provide dynamic adjustment capabilities while the control system maintains precision through independent control of each movement axis.
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 effectively miniaturizes electronic devices by allowing precise control of the optical element's position, enhancing the accuracy of the sensing element, and optimizing the internal space usage, thereby achieving the desired functional performance with a smaller form factor.
Implementation Method 1
The reference element is used to generate a first magnetic field. The sensing element senses the rotation of the movable part frame by sensing the change of the magnetic field direction of the first magnetic field.
Implementation Method 2
The sensing element includes a first magnetoresistive sensor.
Data Source
AI summary
An optical element driving mechanism is provided, including a movable part, a fixed part, and a driving assembly. The movable part is for connecting an optical element. The movable part is movable relative to the fixed part. The driving assembly is for driving the movable part to move relative to the fixed part. The optical element is used to correspond to an electromagnetic wave.