Camera Module Drive Motor With Coil Heat Dissipation Structure
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Solution Overview
Problem
High-end electronic devices face challenges in implementing large-stroke automatic focusing and optical image stabilization in camera modules without increasing the module's volume, while maintaining optical performance.
Innovation Solution
A drive motor with a coil heat dissipation structure and chip heat dissipation structure that effectively dissipates heat generated during operation, preventing it from affecting the optical lens, and a camera module design that integrates these structures to maintain optical performance without increasing the module's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If the coil is installed close to the optical lens to reduce the camera module volume, then the module size is reduced, but the heat generated by the coil affects the optical performance of the lens
Solution Approach 1:
A heat dissipation structure is introduced as an intermediary component between the coil and the optical lens. This heat dissipation structure conducts heat away from the coil while providing thermal isolation to the optical lens, thereby resolving the contradiction between reducing module volume and preventing heat impact on the lens.
Solution Approach 2:
The heat dissipation function is extracted as a separate structural component rather than being integrated into the coil or carrier. This allows the heat dissipation structure to be optimized independently for thermal management while maintaining the compact arrangement of other components.
2Adaptability or versatility
If large-stroke automatic focusing and optical image stabilization are implemented, then the focusing and stabilization performance is improved, but the camera module volume increases
Solution Approach 1:
The drive motor structure is designed to perform multiple functions: automatic focusing, optical image stabilization, and heat dissipation. The heat dissipation structure serves both as a thermal management component and as part of the mechanical support structure, allowing large-stroke movement capabilities without proportionally increasing volume.
Solution Approach 2:
The heat dissipation function is merged with the structural components of the drive motor. The heat dissipation structure is integrated into the carrier or motor housing, combining thermal management with mechanical support functions, thereby achieving multi-functionality without additional volume penalty.
3Temperature
If the coil heat dissipation structure is designed with large area to improve heat dissipation, then heat dissipation performance is improved, but the device complexity increases
Solution Approach 1:
The heat dissipation structure is designed with non-uniform properties: the portion facing the coil has high thermal conductivity to conduct heat away, while the portion near the optical lens has low thermal conductivity to prevent heat transfer to the lens. This local differentiation of thermal properties optimizes heat dissipation while protecting the lens.
Solution Approach 2:
The heat dissipation structure may be constructed from composite materials or multi-layer structures with different thermal conductivity characteristics. This allows the structure to simultaneously achieve efficient heat conduction from the coil and thermal isolation from the optical lens, optimizing heat dissipation without increasing complexity.
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
Enables large-stroke automatic focusing and optical image stabilization without increasing the camera module's volume, ensuring the optical performance of the optical lens by efficiently dissipating heat generated during operation.
Implementation Method 1
The coil heat dissipation structure is a high thermal conduction structure. The coil heat dissipation structure is located between the coil and the carrier, the coil heat dissipation structure is fastened to the carrier, and the coil thermal conduction is fastened to the coil heat dissipation structure with thermal conduction.
Implementation Method 2
heat generated when the coil works may be conducted to the coil heat dissipation structure
Data Source
AI summary
In accordance with an embodiment, a drive motor includes a carrier comprising a lens installation hole configured to have an optical lens installed therein; a coil located on an outer side of the carrier; and a coil heat dissipation structure located between the carrier and the coil, wherein the coil heat dissipation structure is fastened to the carrier, and the coil is fastened to and is in thermal conduction with the coil heat dissipation structure.