Image Sensor Heat Exchanger Airflow Cooling
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Solution Overview
Problem
Conventional image pickup apparatuses face challenges in efficiently radiating heat generated by image sensors, leading to temperature rises that can affect image quality and motion image capturing performance, especially due to the limitations of heat radiating sheets like graphite sheets which either fail to adequately cool the sensors or increase the moving load when thickness and width are increased.
Innovation Solution
The apparatus incorporates an image sensor unit with a movable heat exchanger and a duct unit forming an air channel, where the heat exchanger, often with cylindrical cooling fins, is inserted inside the duct unit to facilitate airflow-based cooling, effectively transferring heat away from the image sensor and control ICs, thereby maintaining optimal operating temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the thickness and width of the heat radiating sheet are increased to increase the heat radiating amount, then the heat radiating performance is improved, but the moving load of the image sensor increases
Solution Approach 1:
The patent introduces a fan unit that generates airflow to pass over the heat radiating sheet, using pneumatic principles to enhance heat dissipation. The airflow carries heat away from the image sensor more efficiently, allowing the heat radiating sheet to be thinner and lighter while maintaining effective cooling performance.
2Temperature
If a heat radiating sheet is attached to the back surface of the device unit to improve heat radiating performance, then the temperature rise of the image sensor is reduced, but the moving load of the image sensor increases
Solution Approach 1:
The patent employs a fan unit that generates directed airflow over the heat radiating sheet, using pneumatic principles to enhance convective heat transfer. This allows the system to use a lighter, thinner heat radiating sheet while achieving effective temperature control of the image sensor through forced convection.
3Power
If the heating value of the image sensor increases due to improvements in motion image performance, then the image quality and motion image capturing capability are improved, but the heat radiating capability of the existing structure becomes insufficient
Solution Approach 1:
The patent introduces a fan unit that generates controlled airflow to pass over the heat radiating sheet, using pneumatic principles to dramatically enhance convective heat transfer. This allows the system to handle the increased heating value from high-performance motion image capturing by efficiently carrying heat away through the airflow, maintaining adequate temperature control despite higher power consumption.
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 enhances heat dissipation capacity beyond traditional graphite sheets, ensuring reliable cooling of the image sensor and control ICs, maintaining extended imaging times while minimizing the moving load and maintaining accurate image stabilization.
Implementation Method 1
a duct unit configured to form an air channel. The movable unit includes an image sensor and a heat exchanger. At least part of the heat exchanger is inserted inside the duct unit through an opening of the duct unit
Implementation Method 2
The apparatus incorporates an image sensor unit with a movable heat exchanger and a duct unit forming an air channel, where the heat exchanger, often with cylindrical cooling fins, is inserted inside the duct unit to facilitate airflow-based cooling
Data Source
AI summary
An image pickup apparatus includes an image sensor unit that includes a fixed unit and a movable unit movable relative to the fixed unit, and a duct unit configured to form an air channel. The movable unit includes an image sensor and a heat exchanger. At least part of the heat exchanger is inserted inside the duct unit through an opening of the duct unit.