Camera Module Shield Can Rib for Heat Dissipation
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Solution Overview
Problem
Existing camera modules face challenges in efficiently dissipating heat, which can affect their performance and reliability, especially in ultra-small form factors used in small electronic devices and vehicles.
Innovation Solution
The camera module incorporates a shield can with ribs that contact the printed circuit board, allowing for improved heat dissipation by transferring heat generated in the substrate module to the outside through a metal shield can, even when the housing is made of plastic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the housing is made of plastic to reduce weight and cost, then weight and manufacturing cost are reduced, but heat dissipation efficiency deteriorates
Solution Approach 1:
The housing is divided into two parts: a plastic housing for structural support and a separate metal shield can for heat dissipation. This segmentation allows each component to be optimized for its specific function without compromising the other, resolving the contradiction between using plastic for weight/cost reasons and needing metal for heat dissipation.
Solution Approach 2:
The metal shield can acts as an intermediary between the heat-generating substrate module and the plastic housing. It provides a thermal conduction path that allows heat to escape from the plastic housing, effectively mediating the heat dissipation issue without requiring the entire housing to be metal.
2Temperature
If the camera module is made ultra-small to fit in small electronic products, then compactness is improved, but heat dissipation capability deteriorates
Solution Approach 1:
The shield can is merged with the housing structure, integrating the heat dissipation function into the existing compact design. By combining the protective shielding function with the heat dissipation function in a single component, the solution achieves effective heat management without requiring additional separate structures that would increase the module volume.
3Temperature
If the shield can is made of metal to improve heat dissipation, then heat dissipation efficiency is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The metal shield can serves multiple functions simultaneously: it provides electromagnetic shielding for the circuit board, acts as a heat dissipation structure through its thermal conductivity, and offers mechanical protection. This multi-functionality justifies the use of metal despite the increased manufacturing complexity, as it eliminates the need for separate shielding and heat dissipation components.
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
Enhances heat dissipation efficiency by effectively transferring heat generated in the substrate module, ensuring better performance and reliability of the camera module, particularly in ultra-small form factors.
Implementation Method 1
transferring heat generated in a substrate module to the outside through the shield can
Data Source
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AI summary
A camera module comprises: a first housing; a lens module disposed in the first housing; a second housing coupled to the first housing; a first printed circuit board disposed in the inner space of the first housing and the second housing; an image sensor disposed on the first printed circuit board; and a shield can disposed under the first printed circuit board in the second housing, wherein the shield can comprises a rib which comes into contact with the lower surface of the first printed circuit board.