Imaging Device Dynamic Filter Switching for Illuminance Adaptation

The patent implements dynamic filter configuration by providing multiple filter units (first filter unit with infrared cut filter, second filter unit with dummy glass, third filter unit with infrared pass filter) that can be selectively inserted or removed from the optical path based on illuminance conditions. This dynamic adjustment allows the imaging device to adapt to different lighting environments (daytime, nighttime, low-light) while maintaining a relatively compact structure through the use of movable filter units.

The patent achieves multi-functionality by designing filter units that can be selectively positioned in the optical path. The first filter unit (infrared cut filter) is used for daytime imaging, the second filter unit (dummy glass) is used for nighttime imaging, and the third filter unit (infrared pass filter) is used for low-light imaging. This universal design allows a single imaging device to handle multiple imaging scenarios without requiring completely separate systems for each condition.

The patent implements preliminary action by pre-configuring different image processing settings corresponding to different filter units and imaging modes. When a filter unit is selected, the processing unit automatically applies the pre-prepared processing parameters optimized for that specific mode. This approach ensures optimal image quality for each imaging condition while minimizing processing time, as the processing settings are prepared in advance rather than calculated in real-time during image capture.