Endoscope Light Source Device Mode Switching Control
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Solution Overview
Problem
Endoscope systems face issues with the generation of abnormal images during mode switching due to the mismatch between light source switching and image processing times, leading to unstable image tones and incorrect processing parameters.
Innovation Solution
A light source device with a light source unit capable of emitting light in multiple wavelength ranges and a control unit that adjusts the light emission ratios during the switching period to match the target mode, ensuring seamless transitions and corresponding image processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the light source is switched quickly to match the mode change, then the switching time is reduced, but the image processing cannot keep up causing abnormal images
Solution Approach 1:
The light source control unit performs preliminary switching of the light source before the image processing is fully switched. This allows the light source to be ready in advance, and the system can then smoothly transition to the new mode without waiting for image processing to complete, thereby reducing overall switching time while maintaining image quality.
Solution Approach 2:
The light source control unit acts as an intermediary that coordinates between the mode switching signal and the image processing unit. It manages the timing and sequence of light source switching relative to image processing, ensuring that the light source changes appropriately while the image processing catches up, thus preventing abnormal images.
2Reliability
If the image processing switching time is extended to match the light source switching, then image quality is maintained, but the overall mode switching time increases
Solution Approach 1:
The light source is switched in advance before image processing completes its transition. This preliminary action allows the system to prepare the light source for the new mode while the image processing unit is still finishing its switching, thereby reducing the perceived mode switching time without compromising image quality.
Solution Approach 2:
The system dynamically adjusts the timing of light source switching relative to image processing switching. Rather than maintaining a fixed relationship, the light source control unit optimizes the switching时序 based on the actual state of image processing, allowing for faster overall mode transitions while ensuring image quality is maintained throughout the transition.
3Speed
If the light emission ratio is changed abruptly, then the switching speed is improved, but image tone stability deteriorates
Solution Approach 1:
The light emission ratio is adjusted in a controlled periodic manner during the switching period. Instead of an abrupt single-step change, the system uses multiple incremental adjustments over several frames, which maintains image tone stability while still achieving relatively fast switching by distributing the change over time.
Data Source
AI summary
A light source unit emits light in a plurality of wavelength ranges. The light source unit can change the light emission ratio of light in each wavelength range. In a case where the switching of first illumination light having a first light emission ratio and second illumination light having a second light emission ratio different from the first light emission ratio is performed, switching-period-illumination light having a switching-period-light-emission ratio different from the first light emission ratio and the second light emission ratio is emitted in a switching period of at least one or more frames.