Perisopic Camera Module Arc Rail Friction Reduction
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Solution Overview
Problem
Periscopic lenses in mobile devices experience unsatisfactory optical stabilization due to friction resistance during the rotation of light deflection elements, affecting image quality and zoom performance.
Innovation Solution
A camera module design featuring a light deflection element fixed to a mounting base that rotates along an arc rail, minimizing friction through an electromagnetic driving mechanism, and a compact periscopic lens configuration with a decoration member to reduce overall thickness and enhance aesthetic appeal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a motor is used to drive the light deflection element to rotate for optical stabilization, then optical stabilization function is achieved, but friction resistance significantly affects the rotation and deteriorates optical stabilization performance
Solution Approach 1:
The patent replaces the traditional motor-driven mechanical rotation system with an optical path adjustment system. Instead of rotating the light deflection element (prism) mechanically, the system adjusts the position of the image sensor or uses electronic image stabilization to achieve the same optical stabilization effect, thereby eliminating friction resistance from mechanical rotation.
Solution Approach 2:
The patent introduces an intermediary mechanism (such as a movable platform or adjustable mount) that allows the light deflection element to be positioned and oriented without direct mechanical rotation. This intermediary structure enables precise angular adjustment while minimizing direct friction contact between rotating parts.
2Manufacturing precision
If a periscopic lens configuration is adopted to achieve 3x optical zoom, then image quality is improved, but the device thickness increases
Solution Approach 1:
The patent transitions from a traditional linear optical path to a folded periscopic optical path that utilizes vertical space instead of horizontal space. By folding the optical path at 45-degree angles using prisms or mirrors, the system achieves the same zoom capability within a reduced thickness profile, effectively moving the optical expansion from one dimension to another.
Solution Approach 2:
The patent employs a compact nested arrangement where the light deflection element is integrated within the mounting base, and the optical components are arranged in a space-efficient configuration. The periscopic lens system is nested within the device housing, with each component optimally positioned to minimize overall thickness while maintaining optical performance.
3Ease of operation
If the light deflection element is rotated through a motor for optical stabilization, then stabilization function is achieved, but the friction affects the rotation and leads to unsatisfying performance
Solution Approach 1:
The patent replaces the motor-driven mechanical rotation system with an optical path adjustment system. Instead of rotating the light deflection element (prism) mechanically, the system adjusts the position of the image sensor or uses electronic image stabilization to achieve the same optical stabilization effect, thereby eliminating friction resistance from mechanical rotation.
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 solution improves optical stabilization performance and image quality by reducing friction during light deflection, while maintaining a compact and aesthetically pleasing device design.
Implementation Method 1
a light deflection element (22), fixed to the mounting base (23), configured to deflect an incident light entering through the light inlet (211)
Implementation Method 2
The driving device (28) has an arc rail (281), and is configured to drive the mounting base (23) to rotate around a central axis (282) of the arc rail (281) along the arc rail (281)
Data Source
Figure 1
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AI summary
A camera module, a camera assembly and an electronic device are provided. The camera module includes a casing, a mounting base, a light deflection element, an image sensor and a driving device. The casing has a light inlet. The mounting base is disposed in the casing. The light deflection element is fixed to the mounting base, and configured to deflect an incident light entering through the light inlet. The image sensor is arranged in the casing and configured to sense the defected incident light. The driving device has an arc rail, and is configured to drive the mounting base to rotate around a central axis of the arc rail along the arc rail.