Lens Module Heat Dissipation via Segmented Optical Filter
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Solution Overview
Problem
The heat dissipation issue in lens modules, particularly near the image side of the lens seat, leads to high temperatures that negatively impact the performance of the module.
Innovation Solution
The introduction of an optical filter that divides the space between the lens barrel and seat into two compartments, with an exhaust channel and air guiding groove system to efficiently exhaust heat from the image side compartment, preventing excessive temperature buildup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the lens module uses a traditional enclosed structure with lens barrel and lens seat, then the structural strength and reliability are maintained, but heat accumulates inside leading to high temperature that adversely affects performance
Solution Approach 1:
The internal space of the lens module is segmented into multiple regions using a baffle structure. The baffle divides the enclosed space into a first space and a second space, allowing different thermal management strategies for different components. This segmentation enables heat generated by the image sensing part to be isolated and managed separately from other components, preventing overall temperature rise while maintaining structural integrity.
Solution Approach 2:
A ventilation channel is introduced into the lens module structure, connecting the first space to the external environment. This pneumatic pathway allows air flow through the module, enabling convective heat transfer from the image sensing part in the first space to the external environment. The ventilation channel acts as a thermal management system that actively removes heat while maintaining the enclosed protective structure.
2Strength
If the lens module maintains an enclosed structure for protection, then structural strength is preserved, but heat dissipation is hindered causing temperature buildup
Solution Approach 1:
The baffle structure segments the internal volume into distinct thermal zones while maintaining the overall enclosed protective structure. This allows the lens barrel and lens seat to remain intact for structural strength, while the segmented spaces enable targeted heat management without compromising the protective enclosure.
Solution Approach 2:
The baffle acts as an intermediary structure between the image sensing part and other components. It creates a controlled interface that allows thermal management through the ventilation channel while maintaining the enclosed protective structure. The baffle mediates between the need for structural integrity and the need for heat dissipation pathways.
3Reliability
If no heat dissipation structure is added to maintain simple design, then device complexity is low, but heat accumulates affecting performance
Solution Approach 1:
The ventilation channel is integrated into the existing lens seat structure, merging the heat dissipation function with the structural component. The channel is formed as part of the lens seat rather than being a separate added component, thus improving performance reliability while minimizing the increase in device complexity through functional integration.
Solution Approach 2:
The baffle structure serves multiple functions: it segments the internal space for thermal management, maintains structural integrity of the enclosed space, and works in conjunction with the ventilation channel for heat dissipation. This multi-functionality improves performance reliability without proportionally increasing device complexity, as one structure achieves multiple objectives.
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 design effectively reduces high temperatures within the lens module, enhancing its performance by ensuring efficient heat dissipation without compromising structural strength or reliability.
Implementation Method 1
an exhaust channel 15 penetrating through the lens seat 13 and communicating the first space 101 with the outside. An air guiding groove is formed by recessing from the installation surface 132 towards the object side, and configured to communicate the second space 102 with the exhaust channel 15
Data Source
AI summary
Provided is a lens module including a lens, a lens barrel for accommodating the lens, a lens seat, and an optical filter disposed in the lens seat. The optical filter divides a space defined by the lens barrel and the lens seat into a first space and a second space. The first space is located at an object side of the optical filter, and the second space is located at the image side of the optical filter. The lens seat is provided with an exhaust channel communicating the first space with the outside. An air guiding groove is formed by recessing from installation surface towards the object side and communicates the second space with the exhaust channel. The air guiding groove includes a first groove close to the first space and a second groove extending from an end of the first groove while being bent towards the inner ring surface.