Switchable Optical Filters on Flexible Circuit Board
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Solution Overview
Problem
Existing filter switching devices for optical devices require complex structures and external wires, leading to low integration and inefficiency in switching between different light wavelengths for imaging applications.
Innovation Solution
An imaging device with a simplified structure that integrates a switching mechanism, driving mechanism, and imaging mechanism on a flexible printed circuit board, allowing for seamless switching between filters using a sliding mechanism and a driving mechanism controlled by a processor to adapt to varying ambient light conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If external wires and sensors are used for filter switching, then filter switching function is achieved, but device complexity increases and integration decreases
Solution Approach 1:
The patent combines the filter switching mechanism, driving mechanism, and imaging mechanism into an integrated assembly where the filters are mounted on a circuit board along with the control electronics. This merging eliminates the need for external wires and sensors, reducing device complexity while maintaining filter switching capability.
Solution Approach 2:
The circuit board serves multiple functions: it acts as the mounting structure for filters, provides electrical connections for the driving mechanism, and integrates the control logic for automatic filter switching based on ambient light detection. This multi-functionality reduces the need for separate external components.
2Device complexity
If multiple filters are integrated on a circuit board, then device integration is improved, but manufacturing complexity may increase
Solution Approach 1:
The patent segments the imaging system into distinct functional modules: the filter assembly mounted on the circuit board, the driving mechanism for filter positioning, and the imaging mechanism. This segmentation allows each module to be manufactured and tested separately before final assembly, reducing overall manufacturing complexity despite the integrated design.
Solution Approach 2:
The circuit board acts as an intermediary platform that standardizes the mounting and electrical connections for the filters and driving mechanism. This standardized interface simplifies the manufacturing process by providing a common platform that can be produced using standard PCB fabrication techniques.
3Productivity
If automatic filter switching is implemented, then imaging effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent implements automatic filter switching by detecting ambient light conditions and automatically selecting the appropriate filter. The system includes a light sensor that provides feedback to the control circuit, which then activates the driving mechanism to position the correct filter in the optical path. This feedback loop enables automatic adaptation to varying lighting conditions.
Solution Approach 2:
The imaging device performs self-adjustment by automatically detecting ambient light levels and switching filters without requiring manual intervention. The integrated control circuit continuously monitors light conditions and autonomously selects the appropriate filter configuration, enabling the device to serve itself in adapting to environmental changes.
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
The solution enhances integration, simplifies the structure, and improves imaging effectiveness by automatically selecting the appropriate filter based on ambient light conditions, ensuring clear image generation across different wavelengths.
Implementation Method 1
The first filter and the second filter are arranged side by side, and the first filter and the second filter respectively allow light of different wavelengths to pass through
Data Source
AI summary
A simple and integrated imaging device for housing motor-switchable and laterally-moving filters between a camera-lens holder and an imaging chip comprises the switchable filters in a cavity and a switching mechanism, and a driving mechanism are also in the cavity. The imaging chip is carried by a flexible printed circuit board. The driving mechanism connected to the switching mechanism drives the switching mechanism to slide back and forth underneath the camera-lens holder, so that either the first or the second switchable filter covers a through hole allowing light to fall on the imaging chip. An electronic device including the imaging device is also disclosed.