Light Source Control via Luminance Correlation for White Balance
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Solution Overview
Problem
The existing white balance adjustment method in image acquisition systems, such as endoscopes and microscopic cameras, requires continuous adjustment of light source intensities based on image sensor outputs, which is inefficient and not accurately controlled.
Innovation Solution
An illuminating device with adjustable light sources and a light monitor unit that detects light amounts, allowing for precise control of light sources based on correlations between luminance and light amounts, enabling accurate color temperature adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If white balance adjustment is performed based on image sensor outputs, then color temperature can be adjusted, but continuous adjustment is required which reduces efficiency
Solution Approach 1:
The patent pre-calculates and stores the correlation between luminance and light amounts for each light source before actual imaging. This preliminary action allows the system to directly retrieve pre-computed adjustment values during operation, eliminating the need for continuous image sensor monitoring and iterative adjustment, thus resolving the contradiction between adjustment accuracy and efficiency
Solution Approach 2:
The system uses a light monitor unit to directly measure the luminance of each light source and automatically computes the required adjustment based on pre-stored correlation data. This self-service mechanism eliminates dependence on image sensor feedback loops, enabling accurate and efficient white balance adjustment without continuous monitoring
2Adaptability or versatility
If light source intensities are adjusted based on image sensor outputs, then white balance can be achieved, but the control is not accurate enough
Solution Approach 1:
The patent implements a feedback mechanism where the light monitor unit continuously monitors the actual luminance output of each light source, and the control unit adjusts the light amounts based on the correlation between measured luminance and required light amounts. This closed-loop feedback ensures accurate and adaptable white balance control
Solution Approach 2:
The patent replaces the indirect control method (adjusting light sources based on image sensor outputs) with a direct control method using a light monitor unit that directly measures light source luminance. This substitution of measurement mechanism enables more precise and accurate light amount control
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 allows for efficient and accurate adjustment of light sources, reducing the need for continuous image sensor output monitoring and improving image quality by maintaining consistent color temperature and light amounts.
Implementation Method 1
a light monitor unit configured to detect each of light amounts of emission light beams
Data Source
AI summary
An illuminating device includes an image acquisition system configured to adjust a plurality of light sources on the basis of a correlation between luminance acquired from an image processing device and the light amounts of the emission light beams. Accordingly, the color temperature of the image processing device can be accurately adjusted because the illuminating device can control the plurality of light sources by individual adjustment to output a desired light.