Semiconductor Substrate Visible Infrared Signal Separation
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Solution Overview
Problem
Existing semiconductor devices face challenges in accurately capturing images using visible light and infrared light simultaneously due to interference from unnecessary wavelength regions, leading to deteriorated color reproducibility and increased complexity and cost.
Innovation Solution
A physical information acquisition method and device that employs a layered film configuration on a substrate, where detection units for visible light and infrared light are separated, allowing for independent detection and correction of signals to eliminate the influence of unnecessary wavelength regions, enabling simultaneous capture of visible and infrared images without the need for additional filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If infrared light cut filters are used to eliminate unnecessary wavelength regions, then color reproducibility is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts and removes the infrared light cut filter from the optical system, achieving infrared rejection through the semiconductor substrate itself rather than through separate filter components. This eliminates the complexity and cost of additional filters while maintaining the ability to reject infrared wavelengths.
Solution Approach 2:
The semiconductor substrate is given multiple functions: it serves both as the primary light-receiving detection medium and as the infrared rejection filter. This multi-functionality eliminates the need for separate infrared cut filters, reducing device complexity while maintaining color reproducibility.
2Measurement precision
If multiple plate types with separate image capturing devices are used for visible and infrared light, then wavelength separation is improved, but device complexity increases
Solution Approach 1:
The patent merges the visible light detection function and infrared rejection function into a single semiconductor substrate. Instead of using separate plates or devices for visible and infrared capture, the invention combines these functions in one integrated structure, reducing complexity while maintaining wavelength separation capability.
Solution Approach 2:
The semiconductor substrate performs multiple functions simultaneously: detecting visible light and rejecting infrared light. This multi-functionality eliminates the need for separate image capturing devices for different wavelength regions, thereby reducing device complexity.
3Measurement precision
If rotating type wavelength resolution optical systems are used, then spectral separation is improved, but device complexity and size increase
Solution Approach 1:
The patent removes the rotating type wavelength resolution optical system entirely, replacing it with a static semiconductor substrate that inherently separates wavelengths through its material properties and structure. This eliminates the complexity of rotating mechanisms while maintaining spectral separation capability.
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 approach allows for high-sensitivity image capture with improved color reproducibility and reduced complexity and cost, as it eliminates the requirement for infrared light cut filters and simplifies the optical system, while maintaining accurate representation of both visible and infrared light images.
Implementation Method 1
a first detection unit for detecting first wavelength region components following second wavelength region components different from the first wavelength region components being separated from the first wavelength region components beforehand
Data Source
AI summary
A physical information acquisition method in which a corresponding wavelength region of visible light with at least one visible light detection unit coupled to an image signal processing unit is detected, each said visible light detection unit comprising a color filter adapted to transmit the corresponding wavelength region of visible light; a wavelength region of infrared light with at least one infrared light detection unit coupled to the image signal processing unit is detected; and, with the signal processing unit, a first signal received from the at least one visible light detection unit by subtracting a product from said first signal is corrected, said product resulting from multiplication of a second signal received from the at least one infrared light detection unit and a predetermined coefficient factor.