Camera Chamber Venting Control for Lens Antifogging
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Solution Overview
Problem
Electronic devices face issues with camera lens fogging due to condensation in varying temperature and humidity scenarios, particularly in low temperature and high humidity environments, which existing solutions like complete enclosure face design challenges and are not effective.
Innovation Solution
An electronic device with an accommodating chamber containing a camera module, equipped with a light-permeable piece and a controllable opening/closing mechanism at the chamber's opening, controlled by humidity and temperature sensors to manage airflow and humidity levels, preventing condensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a completely enclosed space is used to prevent fogging, then the antifogging effect is improved, but the design difficulty increases and complete sealing is difficult to achieve
Solution Approach 1:
The patent uses a waterproof film with micropores to create a flexible sealing solution. This thin film structure can conform to complex geometries and connection interfaces, achieving effective sealing without the rigidity and manufacturing complexity of traditional enclosed structures. The microporous film allows vapor transmission while blocking liquid water, providing antifogging functionality through selective permeability rather than complete enclosure.
Solution Approach 2:
The patent employs a waterproof film containing micropores that allow water vapor to pass through while blocking liquid water. This porous material enables the chamber to maintain pressure equilibrium and prevent fogging simultaneously, avoiding the need for complex active control systems or complete sealing mechanisms.
2Reliability
If the chamber is completely sealed to prevent moisture entry, then the antifogging effect is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The waterproof film with micropores provides a flexible sealing solution that can accommodate manufacturing tolerances and assembly variations. The film's flexibility allows it to conform to slight irregularities in mating surfaces, achieving effective sealing without requiring ultra-precise manufacturing. The microporous structure maintains its vapor-blocking function even with minor positioning variations.
3Reliability
If an opening is provided to discharge moist airflow, then the antifogging effect is improved, but water vapor may enter the chamber
Solution Approach 1:
The waterproof microporous film serves as a selective barrier that allows water vapor to pass through in controlled amounts while blocking liquid water entry. The micropores are sized to permit vapor diffusion but prevent capillary action of liquid water, enabling the chamber to discharge internal moisture while resisting external vapor intrusion.
Solution Approach 2:
The patent applies different properties to different parts of the chamber boundary. The waterproof microporous film provides selective permeability at the chamber walls, while the opening/closing mechanism provides controlled access at the opening. This local differentiation allows vapor discharge when needed while maintaining barrier protection elsewhere.
4Reliability
If the opening/closing piece is added to control airflow, then the antifogging effect is improved, but the device complexity increases
Solution Approach 1:
The opening/closing piece is integrated with the waterproof microporous film, combining the sealing function with the vapor control function in a single component. This integration avoids adding separate complex mechanisms while achieving both opening/closing capability and vapor barrier protection.
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
Effectively maintains a dry environment within the chamber by managing airflow and humidity, reducing condensation on the camera lens, while minimizing design changes to the device.
Implementation Method 1
the opening/closing piece is configured to close the first opening to seal the accommodating chamber at the first position and to open the first opening to discharge moist airflow at the second position
Implementation Method 2
one side, opposite to a photosensitive component of the camera module, of the accommodating chamber is provided with a light-permeable piece
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The disclosure relates to an electronic device and a control method therefor. The electronic device includes: an accommodating chamber (1) configured to accommodate a camera module (1), one side, opposite to a photosensitive component of the camera module (100), of the accommodating chamber (1) is provided with a light-permeable piece (200), the accommodating chamber (1) is provided with a first opening (12) communicating an internal with an external of the accommodating chamber (1), the first opening (12) is provided with an opening/closing piece (4), and the opening/closing piece (4) has a first position and a second position. the opening/closing piece (4) is configured to close the first opening to seal the accommodating chamber (1) at the first position and to open the first opening (12) to discharge moist airflow at the second position.